CN105233973A - Graded desliming system and process for mica - Google Patents

Abstract

The invention relates to a graded desliming system and process for mica. Mica ore pulp enters a first-grade vibration screen to be subjected to first-level screening, and the partition size of the first-grade vibration screen is 0.5 mm; screen underflow, with the size fraction being lower than 0.5 mm, of the first-grade vibration screen enters a mixing tank to be evenly mixed and then is delivered into a 2.0 mm filter through a delivery pump to be subjected to impurity removal; the ore pulp with impurities removed enters a swash plate grader to be subjected to graded desliming, and fine-fraction ore slime with the size fraction being lower than 38 micrometers is discharged into tailings from an overflow discharging port of the swash plate grader; settled sand of the grader is discharged from an underflow discharging port of the swash plate grader and enters a second-grade vibration screen to be screened again, and the partition size of the second-grade vibration screen is 0.3 mm; screen underflow, with the size fraction being lower than 0.3 mm, of the second-grade vibration screen enters the tailings, and oversize products of the second-grade vibration screen enter the next working section. By means of the graded desliming system and process for mica, fine-fraction gangue particles can be effectively thrown away, coarse-fraction mica is effectively reserved, and the recovery rate of mica is increased.

Description

A kind of graded desliming system of MICA and desliming process

Technical field

The present invention relates to a kind of ore-sorting system, particularly a kind of graded desliming system of MICA; The invention still further relates to a kind of graded desliming technique of MICA, belong to ore pulp processing technology field.

Background technology

Mica is a kind of rock-forming mineral, has the characteristics such as insulation, high temperature resistant, glossy, physical and chemical performance is stable, has good thermal insulation, elasticity and toughness, have again and shelled into the performance with flexible transparent sheet.Be widely used in the chemical engineering industries such as building material industry, fire protection sector, extinguishing chemical, welding rod, plastics, electric insulation, papermaking, bituminized paper, rubber, pearlescent pigment.MICA obtains mica concentrate through ore-dressing techniques such as fragmentation, sieve classification, shape separation, selection by winnowing, flotation.While mica monomer dissociates, also create the graininess gangue mineral of fine fraction (particle diameter is below 38 μm), in sieve classification operation, fine-graded gangue particle causes screen cloth to block, and causes sieve classification operation normally to carry out.Therefore graded desliming need be carried out before sieve classification operation.

In current ore-dressing technique, for the MICA that granularity is thicker, first with the screening of primary vibration sieve, under suitable mine-supplying quantity condition, its partition size is 0.5mm, and major part is greater than 0.5mm grade oversize and enters next workshop section; Major part is less than 0.5mm grade screenings again through the screening of secondary vibration sieve, and under suitable mine-supplying quantity condition, its partition size is 0.3mm, and major part is greater than 0.3mm grade oversize and enters next workshop section; Major part is less than 0.3mm grade screenings and directly enters Tailings Dam.

Be in the sieve classification operation of 0.3mm in partition size, because fine-graded gangue particle easily causes screen cloth to block, cause sieve classification operation normally to carry out.Because mica is many, in flake, current classification desliming device cannot meet technological requirement, and while graded desliming, comparatively coarse fraction mica also incites somebody to action jettisoning simultaneously, causes very large waste.

Summary of the invention

Primary and foremost purpose of the present invention is, overcomes problems of the prior art, provides a kind of graded desliming system of MICA, can the effective fine-graded gangue particle of jettisoning, effectively retains comparatively coarse fraction mica, improves the rate of recovery of mica.

For solving above technical problem, the graded desliming system of a kind of MICA of the present invention, comprise primary vibration sieve and secondary vibration sieve, also comprise agitator tank, delivery pump, filter and swash plate grader, the screenings outlet of described primary vibration sieve is connected with the entrance of described agitator tank, the outlet of described agitator tank is connected with the entrance of described delivery pump, described conveying delivery side of pump is connected with the entrance of described filter, the outlet of described filter is connected with the charging aperture of described swash plate grader, the overflow discharging opening of described swash plate grader is connected with tail-mineral pipeline, the entrance that underflow discharging opening and the described secondary vibration of described swash plate grader are sieved is connected, the screenings outlet of described secondary vibration sieve is connected with tail-mineral pipeline.

Relative to prior art, the present invention achieves following beneficial effect: MICA ore pulp enters primary vibration sieve and carries out one-level screening, primary vibration sieve screenings below 0.5mm grade enters after agitator tank stirs evenly and sends into the impurity elimination of 2.0mm filter by delivery pump, and the ore pulp after impurity elimination enters swash plate grader and carries out graded desliming; The Fine fraction of ore mud of grade less than 38 μm is discharged from the overflow discharging opening of swash plate grader and is entered mine tailing; Grader sand setting is discharged from the underflow discharging opening of swash plate grader, enters secondary vibration sieve and again sieves, and the secondary vibration sieve screenings below 0.3mm grade enters mine tailing, and the oversize of secondary vibration sieve enters next workshop section.Mica ore pulp graded desliming system of the present invention, technological process is simple and reliable, and achieve the rapid classification desliming operation of ore pulp, operational efficiency is high, ensure that the normal production that secondary vibration is sieved; After swash plate grader carries out graded desliming operation, the classification matter efficiency of 38 μm can reach 65%, and in the overflow of swash plate grader, mica grade is less than 30%, greatly improves the rate of recovery of mica.

As improvement of the present invention, described swash plate grader comprises rotary drum case and is positioned at the drum assembly of rotary drum case inner chamber, described rotary drum case is surrounded by superposed overflow case and the underflow case that is positioned at bottom and forms, the top of described overflow case be fornix shape and top center by overflow case top closure, the bottom, periphery of described overflow case is provided with overflow discharging opening, and the bottom, periphery of described underflow case is provided with underflow discharging opening; The center of described overflow case top cover is plugged with feed pipe, and the axis of the lower end edge drum assembly of described feed pipe is inserted into the inner chamber bottom of drum assembly, and the lower end periphery of described feed pipe is provided with the feed pipe flinger ring stoping liquid upper reaches; The mid diameter maximum of described drum assembly is evenly distributed with multiple rotary drum underflow opening, and described rotary drum underflow opening is connected by runner with described underflow discharging opening; The top of described drum assembly is circumferentially evenly distributed with multiple rotary drum overfall, and described rotary drum overfall is connected by runner with described overflow discharging opening; The bottom centre of described drum assembly is fixed on the armature spindle upper end of mair motor, and described mair motor is fixed on the inner chamber of base, and the upper port of described base is fixedly connected with the lower end of described underflow case.When 1. working, drum assembly High Rotation Speed under the driving of mair motor produces very large centrifugal force, rotary drum case and feed pipe transfixion, material enters the inner chamber bottom of drum assembly by feed pipe, under the effect of feed pipe flinger ring and centrifugal force, after the runner entering drum assembly carries out rotating separation, after light phase material is discharged from the rotary drum overfall on drum assembly top, the overflow discharging opening arriving bottom, overflow case periphery through runner is also discharged; Concentrated phase material arrives the underflow discharging opening of bottom, underflow case periphery through runner and discharges, so achieving the classification of light phase material and concentrated phase material after discharging from the rotary drum underflow opening of drum assembly mid diameter maximum.2. grader of the present invention self contains power source, drum assembly High Rotation Speed, produces powerful centrifugal force field, and can accelerate the sedimentation separation of microfine, production efficiency is high, effectiveness of classification and efficiency high, treating capacity is large.3. grader floor space of the present invention is little, and the costs such as equipment investment and capital construction stringing are low.4. little by feed force restriction, graded index is stablized.5. the built-in and Direct driver drum assembly of mair motor, has greatly saved drive disk assembly, has made equipment compacter, greatly reduced gross weight and the appearance and size of equipment, be convenient to whole Transporting and lifting, saved manufacturing cost.6. grader of the present invention is outside forms a closed entirety by base, underflow case and overflow case are stacked successively, and external without any rotary part, security is good, and profile is succinctly attractive in appearance.7. drum assembly of the present invention and mair motor coaxial line, rotation portion entirety state axisymmetricly, be conducive to equipment and keep dynamic balancing when High Rotation Speed, the force-bearing situation of bearing portion is good, long service life.8. with adopt compared with traditional hydrocyclone or lamella thickener classification, swash plate grader floor space of the present invention is little, production efficiency is high, invests low, effectiveness of classification and efficiency high, simplify Desliming process, substantially increase the rate of recovery of object metal, without the need to adopting multistage desliming, also without the need to adding flocculant, the composition of flocculant can not be brought in ore pulp and affect mineral processing index, reduce reagent cost and be conducive to reducing the pollution to environment.

As improvement of the present invention, the inner chamber of described overflow case is provided with overflow inner casing, described overflow inner casing envelope is in the upper periphery of described drum assembly, and the top of described overflow inner casing is connected with inner casing apical ring, and described inner casing apical ring is positioned at the lower outer of described rotary drum overfall; Be interconnected by overflow discharging ring between described overflow inner casing and described overflow case, described overflow discharging ring to round and minimum position is docked with described overflow discharging opening along the chuck of described overflow case in the shape of a spiral; The inner chamber of described underflow case is provided with underflow inner casing, described underflow inner casing envelope is in the lower, outer perimeter of described drum assembly, the top of described underflow inner casing is positioned at inside the below of described rotary drum underflow opening, be interconnected by underflow discharging ring between described underflow inner casing and described underflow case, described underflow discharging ring to round and minimum position is docked with described underflow discharging opening along the chuck of described underflow case in the shape of a spiral.When grader is in running order, drum assembly High Rotation Speed, after light phase material is discharged from the rotary drum overfall on drum assembly top, outwards fly out under huge centrifugal action, cross the endoporus of inner casing apical ring, enter in the chuck between overflow case and overflow inner casing, drop on overflow discharging ring, rotate descending along overflow discharging ring, the minimum position of overflow discharging ring is docked with overflow discharging opening, is discharged by light phase material.After the rotary drum underflow opening of concentrated phase material in the middle part of drum assembly is discharged, outwards fly out under huge centrifugal action, enter in the chuck between underflow case and underflow inner casing, drop on underflow discharging ring, rotate descending along underflow discharging ring, the minimum position of underflow discharging ring is docked with underflow discharging opening, is discharged by concentrated phase material.When grader needs cleaning, stop material supply, clear water enters from feed pipe, drum assembly rotates a period of time under remaining on fast state, the inner chamber of clear water to material flow path and drum assembly washs, and then clear water flies out from rotary drum overfall and rotary drum underflow opening, overflow discharging ring and underflow discharging ring is cleaned up respectively, overflow discharging ring and underflow discharging ring whole process do not have dead angle, can thoroughly be cleaned up.Then reduce the rotating speed of drum assembly, centrifugal force diminishes, and the water outlet of rotary drum overfall falls from the endoporus of inner casing apical ring, and the outer wall along drum assembly flows, and cleans from top to bottom to the outer wall of drum assembly.The top of underflow inner casing is positioned at inside the below at drum assembly maximum gauge place, and rinse water is dropped on underflow discharging ring.

As improvement of the present invention, the bottom centre region of described drum assembly is upwards recessed to form up-small and down-big and is the rotary drum cavity in isosceles trapezoid cross section, in described rotary drum cavity, rotary drum fan is installed, described rotary drum fan is the low taper in height periphery, center, and the center of described rotary drum fan is fixed on the armature spindle of described mair motor; The inner chamber of described base is provided with the base inner casing with base coaxial line, be interconnected by base gusset between described base inner casing and the internal perisporium of base, the upper end cover of described mair motor stretches out the periphery of motor body and is fixedly connected in the upper port of described base inner casing, described mair motor upper end cover is circumferentially evenly distributed with multiple motor upper cover air vent, the fresh air inlet that the inner chamber lower circumference of described base being respectively equipped with multiple and described base inner casing communicates near outer rim; The highest portion position of described underflow discharging ring is lower than the upper limb of described underflow inner casing; The below of described rotary drum fan is provided with drip tray, described drip tray is low inside and high outside taper, the inner edge of described drip tray is provided with the flanging upwards bent, described flanging embeds in the annular groove of described rotary drum fan lower surface, the periphery of described drip tray is provided with the annular deep gouge to lower recess, the middle part of described underflow inner casing short transverse is provided with spilled water hole, described spilled water hole communicates with the bottom of described annular deep gouge, and the axis of described spilled water hole and the axis of described underflow discharging opening are positioned at same perpendicular.Because mair motor is underlying, mair motor region can not have water droplet to enter, when drum assembly during High Rotation Speed, under centrifugal action, flies out outside current direction under mair motor drives; Rotary drum fan is also with the armature spindle High Rotation Speed of mair motor simultaneously, air-flow enters the inner chamber of base inner casing from the fresh air inlet of base lower circumference, the superjacent air space of mair motor is entered again from motor upper cover air vent, under the effect of rotary drum fan, upwards blow out from the gap between base inner casing top and drum assembly, stop water droplet to fall from here.When equipment is in cleaning state, rinse water drops on underflow discharging ring, a small amount of water droplet can flow downward to the lowest part of drum assembly along the outer wall of drum assembly, then fall on drip tray, because drip tray is low inside and high outside taper and inner edge is provided with the flanging upwards bent, all water droplets can outwards flow in annular deep gouge, then fall to underflow discharging ring from the spilled water hole underflow inner casing.The water height of annular deep gouge is enough to ensure the mobilization dynamic to spilled water hole, and drip tray can not be made to produce overflow.The underflow discharging ring of underflow discharge outlet is in extreme lower position, and spilled water hole is located at and can keeps maximum drop with underflow discharging ring herein, avoids the annular of the current direction on underflow discharging ring deep gouge to pour in down a chimney.

As improvement of the present invention, described drum assembly comprises rotary drum body, and described rotary drum body is the cydariform that upper and lower two ends diameter is little, middle part diameter is large; The inner chamber of described rotary drum body is provided with the swash plate support with rotary drum body coaxial line, and the center of described swash plate support is provided with up-small and down-big conically shaped, and the lower end of described feed pipe is inserted into the inner chamber bottom of described conically shaped; The periphery, bottom of described conically shaped is connected with up-small and down-big conical floor, and the lower edge of described conical floor is supported on the inwall of described rotary drum body, leaves charging space between the below of described conical floor and the bottom of described rotary drum body; The outer wall of described conically shaped is radially evenly provided with the outer gusset of many conically shapeds, and form upper circulation road respectively between the outer gusset of adjacent two conically shapeds, the upper end of described upper circulation road communicates with corresponding described rotary drum overfall respectively; The top of described conical floor is stacked with multiple up-small and down-big and taper swash plate that shape size is identical successively, the upper surface of each taper swash plate is provided with multiple tracks and is radially uniformly distributed and highly equal fin, the outer gusset one_to_one corresponding of described fin and described conically shaped and be positioned in identical phase place, the inner periphery of each taper swash plate is fixed on the outer gusset of described conically shaped by keyway; Be respectively equipped with swash plate through hole between the lower end of fin described in adjacent two, each swash plate through hole is distributed in circumferentially same; The lower circumference of described conical floor is provided with multiple chassis through hole, described chassis through hole and described swash plate through hole one_to_one corresponding and mutually through; Swash plate gland is pressed with above the taper swash plate of top layer, the periphery of described swash plate gland is fixed in the upper port of described rotary drum body, the centre of described swash plate gland protrudes upward outside described inner casing apical ring, the upper port of described swash plate gland is provided with and overflows lid, the described centre overflowing lid is higher than lower circumference, the described lower circumference overflowing lid is fixed in the upper port of described swash plate gland, overflows the lower circumference of lid and level points to outside described in each described rotary drum overfall is arranged in.The horn mouth of conically shaped lower end plays the effect of diffusion material, bottom conically shaped, the conical floor of periphery plays the effect supporting taper swash plate, conical floor and swash plate gland carry out axial location to taper swash plate heap jointly, and the outer gusset of each conically shaped carries out centralized positioning to taper swash plate heap and carries out radial location by key; The bottom of arrival conically shaped after material flows out from feed pipe, enter the underlying space of conical floor under the influence of centrifugal force, then each chassis through hole and swash plate through hole is upward through, settlement space is formed between two taper swash plates, the lower surface of concentrated phase material each taper swash plate because particle diameter is deposited in more greatly, and to the large end flowing of taper swash plate under centrifugal action, then depart from taper swash plate and flow out from each rotary drum underflow opening; Light phase material is because the less gap between taper swash plate of particle diameter is to overflow, and the upper circulation road from each conically shaped between gusset upwards flows, and finally flows out from overflowing lid each rotary drum overfall circumferentially.The fin of each taper swash plate upper surface makes to keep equal distance between taper swash plate, the space between taper swash plate is divided into some deciles simultaneously, and the upper circulation road separately between gusset outer with conically shaped is corresponding to be communicated with; Form swash plate heap because drum assembly adopts multiple thinner taper swash plate to be superimposed, significantly increase settling area, improve output; Simultaneously due to the High Rotation Speed of drum assembly, be beneficial to centrifugation and the discharge of concentrated phase material, greatly improve classification efficiency.

As improvement of the present invention, described in overflow between the centre of lid and lower circumference and be connected as a single entity by overflowing the lid conical surface, described in overflow on the lid conical surface and be evenly distributed with multiple jet orifice; Described overflow case top cover points to described jet orifice position corresponding be circumferentially at least provided with a visor.After material enters conically shaped bottom from feed pipe, to the flowing underneath of conical floor under centrifugal action, feed pipe flinger ring plays the effect stoping liquid up; If but the feed rate of feed pipe is excessive, exceed the disposal ability of swash plate grader, material upwards will choke along conically shaped, upwards spray from the jet orifice overflowed the lid conical surface, be mapped on visor, operating personnel can observe this phenomenon from device external, suitably reduce feed rate, thus both can ensure that grader worked under comparatively large discharge, flow excess load can be avoided again.

As improvement of the present invention, the armature spindle upper end of described mair motor is connected with up-small and down-big deflection cone, and the lower surface of described deflection cone is pressed on the diapire of described rotary drum body; Radially evenly be provided with multiple tracks charging shunting gusset in the inner chamber of described conically shaped and the underlying space of described conical floor and the underlying space of conically shaped inner chamber and described conical floor is separated into multiple independently charging runner; Described charging shunting gusset and described conically shaped gusset one_to_one corresponding and be positioned in identical phase place outward, the lower end of each described charging runner is communicated with described swash plate through hole one_to_one corresponding respectively; Lower disc is provided with between the described taper swash plate of bottom and described conical floor, be provided with disc between the described taper swash plate of top layer and described swash plate gland, described lower disc be circumferentially respectively equipped with disc through hole with described swash plate through hole one_to_one corresponding and mutually through.Deflection cone can reduce material to resistance during conical floor flowing underneath, and material flow path is divided into multiple unit by the fin on charging shunting gusset, taper swash plate and the outer gusset of conically shaped, makes between each unit separate, avoids the disorder in flow field.The upper and lower surface of upper disc and lower disc can be parallel to each other, also can be in a certain angle, changes the upper disc of different angles and lower disc, the drift angle of taper swash plate can be changed, to adapt to different mineral better, substantially increase the versatility of grader, reduce equipment investment.

As improvement of the present invention, described in overflow lid and described swash plate gland upper port between be provided with overflow and regulate plate, described overflow regulates between the inner periphery of plate and the outer wall of described conically shaped and leaves gap.Overflow regulates plate to the insertion depth of overflow ducts, determine the uninterrupted of light phase material, overflow flow velocity is avoided to cause classification insufficient too soon, the overflow changing different size regulates plate, just can adapt to different mineral better, substantially increase the versatility of grader, reduce equipment investment.

As improvement of the present invention, be separately installed with underflow nozzle in described rotary drum underflow opening, the inner termination of described underflow nozzle is embedded with anti-wearing liner respectively, the inner face of described anti-wearing liner is respectively equipped with bush ring connected in star.Because the wearing and tearing of concentrated phase material to underflow nozzle are larger, the inner termination of underflow nozzle arranges the service life that anti-wearing liner can extend underflow nozzle; In use, amass in bush ring connected in star and expired ore pulp material, first ore pulp deposit bears the impact of concentrated phase material to equipment, defines with the situation of thing mill thing, extends the service life of underflow nozzle further.

Another object of the present invention is, provides a kind of desliming process of ore pulp, can the effective fine-graded gangue particle of jettisoning, effectively retains comparatively coarse fraction mica, improves the rate of recovery of mica.

For solving above technical problem, the graded desliming technique of MICA of the present invention, in turn includes the following steps: (1) MICA ore pulp enter primary vibration sieve carry out one-level screening, primary vibration sieve partition size be 0.5mm; (2) the primary vibration sieve screenings below 0.5mm grade enters agitator tank; Agitator tank stir evenly after ore pulp send into the impurity elimination of 2.0mm filter by delivery pump; (4) the ore pulp after impurity elimination enters swash plate grader and carries out graded desliming; (5) grader sand setting is discharged from the underflow discharging opening of swash plate grader, and the Fine fraction of ore mud of grade less than 38 μm is discharged from the overflow discharging opening of swash plate grader and entered mine tailing; Grader sand setting enter secondary vibration sieve again sieve, secondary vibration sieve classification granularity be below 0.3mm, 0.3mm grade secondary vibration sieve screenings enter mine tailing.

Relative to prior art, the present invention achieves following beneficial effect: mica ore pulp grading technology of the present invention is simple and reliable, and achieve the rapid classification desliming operation of ore pulp, operational efficiency is high, ensure that the normal production that secondary vibration is sieved; After swash plate grader carries out graded desliming operation, the classification matter efficiency of 38 μm can reach 65%, and in the overflow of swash plate grader, mica grade is less than 30%, greatly improves the rate of recovery of mica.

Accompanying drawing explanation

Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation, and accompanying drawing only provides reference and explanation use, is not used to limit the present invention.

Fig. 1 is the flow chart of the graded desliming system of MICA of the present invention.

Fig. 2 is the front view of swash plate grader in the present invention.

Fig. 3 is the top view of Fig. 2.

Fig. 4 is the left view of Fig. 2.

Fig. 5 is the sectional view along A-A in Fig. 3.

Fig. 6 is the enlarged drawing at B position in Fig. 5.

Fig. 7 is the stereogram of swash plate grader in the present invention.

Fig. 8 is the runner schematic diagram of the overflow discharging ring of swash plate grader.

Fig. 9 is the three-dimensional exploded view of swash plate grader in the present invention.

Figure 10 is the three-dimensional exploded view of drum assembly.

Figure 11 is the control principle drawing of swash plate grader of the present invention.

In figure: S1. primary vibration sieves; T1. agitator tank; B1. delivery pump; L1. filter; D1. swash plate grader; S2. secondary vibration sieve; 1. base; 1a. base inner casing; 1b. base gusset; 1c. fresh air inlet; 2. mair motor; 2a. armature spindle; 2b. deflection cone; 2c. motor upper cover air vent; 3. drip tray; 3a. annular deep gouge; 4. rotary drum fan; 5. rotary drum body; 5a. rotary drum underflow opening; 5b. underflow nozzle; 5b1. anti-wearing liner; 5b2. bush ring connected in star; 5c. rotary drum body counterweight tank; 6. conically shaped; The outer gusset of 6a. conically shaped; 6b. charging shunting gusset; 7. conical floor; 8. descend disc; 9. taper swash plate; 9a. swash plate through hole; 10. go up disc; 11. swash plate glands; 11a. gland counterweight tank; 12. overflow lid; 12a. rotary drum overfall; 12b. jet orifice; 12c. overflow regulates plate; 13. feed pipes; 13a. feed pipe flinger ring; 14. overflow cases; 14a. overflow case top cover; 14b. overflow discharging opening; 15. overflow inner casings; 15a. inner casing apical ring; 16. overflow discharging rings; 17. visors; 18. underflow cases; 18a. underflow discharging opening; 19. underflow inner casings; 19a. spilled water hole; 20. underflow discharging rings; 21. terminal boxes; SA1. safety relay; SB1. scram button; SB2. stop button; SB3. start button; SB4. SR; SW1. safety door protects switch; SW2. pulse signal detection switch; SW3. vibration signal sense switch; PTC1. temperature signal sense switch; CM1. mair motor control relay; KT1. very first time relay; KT2. second time relay; KT3. the 3rd time relay; LP1. signal lamp; F1. fuse one; F2. fuse two; F3. fuse three; Q1. electrothermal relay.

Detailed description of the invention

As shown in Figure 1, the graded desliming system of MICA of the present invention comprises primary vibration sieve S1, agitator tank T1, delivery pump B1, filter L1, swash plate grader D1 and secondary vibration sieve S2, the screenings outlet of primary vibration sieve S1 is connected with the entrance of agitator tank T1, the outlet of agitator tank T1 is connected with the entrance of delivery pump B1, the outlet of delivery pump B1 is connected with the entrance of filter L1, the outlet of filter L1 is connected with the charging aperture of swash plate grader D1, the overflow discharging opening of swash plate grader D1 is connected with tail-mineral pipeline, the entrance that underflow discharging opening and the secondary vibration of swash plate grader D1 sieve S2 is connected, the screenings outlet of secondary vibration sieve S2 is connected with tail-mineral pipeline.

MICA ore pulp enters primary vibration sieve S1 and carries out one-level screening, and the partition size of primary vibration sieve S1 is 0.5mm; Primary vibration sieve oversize more than 0.5mm grade enters next workshop section, primary vibration sieve screenings below 0.5mm grade enters after agitator tank T1 stirs evenly, 2.0mm filter L1 impurity elimination is sent into by delivery pump B1, ore pulp after impurity elimination enters swash plate grader D1 and carries out graded desliming, and the Fine fraction of ore mud of grade less than 38 μm is discharged from the overflow discharging opening of swash plate grader D1 and entered mine tailing; Grader sand setting is discharged from the underflow discharging opening of swash plate grader D1, enter secondary vibration sieve S2 again to sieve, secondary vibration sieve S2 partition size is that the secondary vibration sieve screenings of below 0.3mm, 0.3mm grade enters mine tailing, and the oversize of secondary vibration sieve S2 enters next workshop section.

As shown in Fig. 2 to Figure 10, swash plate grader D1 comprises rotary drum case and is positioned at the drum assembly of rotary drum case inner chamber, rotary drum case is surrounded by superposed overflow case 14 and the underflow case 18 that is positioned at bottom and forms, the top of overflow case 14 is fornix shape and top center is closed by overflow case top cover 14a, the bottom, periphery of overflow case 14 is provided with overflow discharging opening 14b, and the bottom, periphery of underflow case 18 is provided with underflow discharging opening 18a; The center of overflow case top cover 14a is plugged with feed pipe 13, and the axis of the lower end edge drum assembly of feed pipe 13 is inserted into the inner chamber bottom of drum assembly, and the lower end periphery of feed pipe 13 is provided with the feed pipe flinger ring 13a stoping liquid upper reaches; The mid diameter maximum of drum assembly is evenly distributed with multiple rotary drum underflow opening 5a, and rotary drum underflow opening 5a is connected by runner with underflow discharging opening 18a; The top of drum assembly is circumferentially evenly distributed with multiple rotary drum overfall 12a, and rotary drum overfall 12a is connected by runner with overflow discharging opening 14b; The bottom centre of drum assembly is fixed on the armature spindle 2a upper end of mair motor 2, and mair motor 2 is fixed on the inner chamber of base 1, and the upper port of base 1 is fixedly connected with the lower end of underflow case 18, and the periphery of base 1 is provided with terminal box 21.

The inner chamber of overflow case 14 is provided with overflow inner casing 15, and overflow inner casing 15 envelope is in the upper periphery of drum assembly, and the top of overflow inner casing 15 is connected with inner casing apical ring 15a, and inner casing apical ring 15a is positioned at the lower outer of rotary drum overfall 12a; Be interconnected by overflow discharging ring 16 between overflow inner casing 15 and overflow case 14, overflow discharging ring 16 to round and minimum position is docked with overflow discharging opening 14b along the chuck of overflow case 14 in the shape of a spiral; The inner chamber of underflow case 18 is provided with underflow inner casing 19, underflow inner casing 19 envelope is in the lower, outer perimeter of drum assembly, the top of underflow inner casing 19 is positioned at inside the below of rotary drum underflow opening 5a, be interconnected by underflow discharging ring 20 between underflow inner casing 19 and underflow case 18, underflow discharging ring 20 to round and minimum position is docked with underflow discharging opening 18a along the chuck of underflow case 18 in the shape of a spiral.

During work, drum assembly High Rotation Speed under the driving of mair motor 2 produces very large centrifugal force, rotary drum case and feed pipe 13 transfixion, material enters the inner chamber bottom of drum assembly by feed pipe 13, under the effect of feed pipe flinger ring 13a and centrifugal force, after the runner entering drum assembly carries out rotating separation, after light phase material is discharged from the rotary drum overfall 12a on drum assembly top, the overflow discharging opening 14b arriving bottom, overflow case 14 periphery through runner also discharges; Concentrated phase material arrives the underflow discharging opening 18a of bottom, underflow case 18 periphery through runner and discharges, so achieving the classification of light phase material and concentrated phase material after discharging from the rotary drum underflow opening 5a of drum assembly mid diameter maximum.

When grader is in running order, drum assembly is with 900 ~ 1200rpm High Rotation Speed, after light phase material is discharged from the rotary drum overfall 12a on drum assembly top, outwards fly out under huge centrifugal action, cross the endoporus of inner casing apical ring 15a, enter in the chuck between overflow case 14 and overflow inner casing 15, drop on overflow discharging ring 16, rotate descending along overflow discharging ring 16, the minimum position of overflow discharging ring 16 is docked with overflow discharging opening 14b, is discharged by light phase material.After the rotary drum underflow opening 5a of concentrated phase material in the middle part of drum assembly discharges, outwards fly out under huge centrifugal action, enter in the chuck between underflow case 18 and underflow inner casing 19, drop on underflow discharging ring 20, rotate descending along underflow discharging ring 20, the minimum position of underflow discharging ring 20 is docked with underflow discharging opening 18a, is discharged by concentrated phase material.

When grader needs cleaning, stop material supply, clear water enters from feed pipe 13, drum assembly rotates a period of time under remaining on fast state, the inner chamber of clear water to material flow path and drum assembly washs, then clear water flies out from rotary drum overfall 12a and rotary drum underflow opening 5a, overflow discharging ring 16 and underflow discharging ring 20 is cleaned up respectively.Then reduce the rotating speed of drum assembly, centrifugal force diminishes, and the water outlet of rotary drum overfall 12a falls from the endoporus of inner casing apical ring 15a, and the outer wall along drum assembly flows, and cleans from top to bottom to the outer wall of drum assembly.The top of underflow inner casing 19 is positioned at inside the below at drum assembly maximum gauge place, and rinse water is dropped on underflow discharging ring 20.

The bottom centre region of drum assembly is upwards recessed to form up-small and down-big and is the rotary drum cavity in isosceles trapezoid cross section, rotary drum fan 4 is installed in rotary drum cavity, the taper that rotary drum fan 4 is low in height periphery, center, the center of rotary drum fan 4 is fixed on the armature spindle 2a of mair motor 2; The inner chamber of base 1 is provided with the base inner casing 1a with base coaxial line, be interconnected by base gusset 1b between the internal perisporium of base inner casing 1a and base 1, the upper end cover of mair motor 2 stretches out the periphery of motor body and is fixedly connected in the upper port of base inner casing 1a, mair motor 2 upper end cover is circumferentially evenly distributed with multiple motor upper cover air vent 2c near outer rim, the lower circumference of base 1 is respectively equipped with multiple fresh air inlet 1c communicated with the inner chamber of base inner casing 1a; The highest portion position of underflow discharging ring 20 is lower than the upper limb of underflow inner casing 19.

The below of rotary drum fan 4 is provided with drip tray 3, drip tray 3 is in low inside and high outside taper, the inner edge of drip tray 3 is provided with the flanging upwards bent, flanging embeds in the annular groove of rotary drum fan 4 lower surface, the periphery of drip tray 3 is provided with the annular deep gouge 3a to lower recess, the middle part of underflow inner casing 19 short transverse is provided with spilled water hole 19a, and spilled water hole 19a communicates with the bottom of annular deep gouge 3a, and the axis of spilled water hole 19a and the axis of underflow discharging opening 18a are positioned at same perpendicular.

Because mair motor 2 is underlying, mair motor 2 region can not have water droplet to enter, when drum assembly during High Rotation Speed, under centrifugal action, flies out outside current direction under mair motor 2 drives; Rotary drum fan 4 is also with the armature spindle 2a High Rotation Speed of mair motor 2 simultaneously, air-flow enters the inner chamber of base inner casing 1a from the fresh air inlet 1c of base 1 lower circumference, the superjacent air space of mair motor 2 is entered again from motor upper cover air vent 2c, under the effect of rotary drum fan 4, upwards blow out from the gap between base inner casing 1a top and drum assembly, stop water droplet to fall from here.

When equipment is in cleaning state, rinse water drops on underflow discharging ring 20, a small amount of water droplet can flow downward to the lowest part of drum assembly along the outer wall of drum assembly, then fall on drip tray 3, because drip tray 3 is in low inside and high outside taper and inner edge is provided with the flanging upwards bent, all water droplets can outwards flow in annular deep gouge 3a, then fall to underflow discharging ring 20 from the spilled water hole 19a underflow inner casing 19.The water height of annular deep gouge 3a is enough to ensure the mobilization dynamic to spilled water hole 19a, and drip tray 3 can not be made to produce overflow.The underflow discharging ring 20 at underflow discharging opening 18a place is in extreme lower position, and spilled water hole 19a is located at and can keeps maximum drop with underflow discharging ring 20 herein, avoids the annular of the current direction on underflow discharging ring 20 deep gouge 3a to pour in down a chimney.

Drum assembly comprises rotary drum body 5, and rotary drum body 5 is the cydariform that upper and lower two ends diameter is little, middle part diameter is large; The inner chamber of rotary drum body 5 is provided with the swash plate support with rotary drum body coaxial line, and the center of swash plate support is provided with up-small and down-big conically shaped 6, and the lower end of feed pipe 13 is inserted into the inner chamber bottom of conically shaped 6; The periphery, bottom of conically shaped 6 is connected with up-small and down-big conical floor 7, and the lower edge of conical floor 7 is supported on the inwall of rotary drum body 5, leaves charging space between the below of conical floor 7 and the bottom of rotary drum body 5; The outer wall of conically shaped 6 is radially evenly provided with the outer gusset 6a of many conically shapeds, and form upper circulation road respectively between the outer gusset 6a of adjacent two conically shapeds, the upper end of upper circulation road communicates with corresponding rotary drum overfall 12a respectively.

The top of conical floor 7 is stacked with multiple up-small and down-big and taper swash plate 9 that shape size is identical successively, the upper surface of each taper swash plate 9 is provided with multiple tracks and is radially uniformly distributed and highly equal fin, the outer gusset 6a one_to_one corresponding of fin and conically shaped and be positioned in identical phase place, the inner periphery of each taper swash plate 9 is fixed on the outer gusset 6a of conically shaped by keyway; Be respectively equipped with swash plate through hole 9a between the lower end of adjacent two fins, each swash plate through hole 9a is distributed in circumferentially same; The lower circumference of conical floor 7 is provided with multiple chassis through hole, chassis through hole and swash plate through hole 9a one_to_one corresponding and mutually through.

Swash plate gland 11 is pressed with above the taper swash plate 9 of top layer, the periphery of swash plate gland 11 is fixed in the upper port of rotary drum body 5, the centre of swash plate gland 11 protrudes upward outside inner casing apical ring 15a, the upper port of swash plate gland 11 is provided with and overflows lid 12, overflow the centre of lid 12 higher than lower circumference, the lower circumference overflowing lid 12 is fixed in the upper port of swash plate gland 11, and each rotary drum overfall 12a is arranged in the lower circumference and level sensing outside that overflow lid 12.In Fig. 9, the taper swash plate 9 of multiple superposed is reduced to swash plate heap.

The horn mouth of conically shaped 6 lower end plays the effect of diffusion material, bottom conically shaped 6, the conical floor 7 of periphery plays the effect supporting taper swash plate 9, conical floor 7 and swash plate gland 11 carry out axial location to taper swash plate heap jointly, and the outer gusset 6a of each conically shaped carries out centralized positioning to taper swash plate heap and carries out radial location by key; Material flows out the bottom of rear arrival conically shaped 6 from feed pipe 13, enter the underlying space of conical floor 7 under the influence of centrifugal force, then each chassis through hole and swash plate through hole 9a is upward through, settlement space is formed between two taper swash plates 9, the upper surface of concentrated phase material each taper swash plate 9 because proportion is deposited in more greatly, and to the large end flowing of taper swash plate 9 under centrifugal action, then depart from taper swash plate 9 and flow out from each rotary drum underflow opening 5a; Light phase material is because the little gap between taper swash plate 9 of proportion is to overflow, and the upper circulation road from each conically shaped between gusset 6a upwards flows, and finally flows out from overflowing lid 12 each rotary drum overfall 12a circumferentially.

The fin of each taper swash plate 9 upper surface makes to keep equal distance between taper swash plate 9, the space between taper swash plate 9 is divided into some deciles simultaneously, and the upper circulation road separately between gusset 6a outer with conically shaped is corresponding to be communicated with; Form swash plate heap because drum assembly adopts multiple thinner taper swash plate 9 to be superimposed, significantly increase settling area, improve output; Simultaneously due to the High Rotation Speed of drum assembly, utilize centrifugation and the discharge of concentrated phase material, greatly improve classification efficiency.

Overflow between the centre of lid 12 and lower circumference and be connected as a single entity by overflowing the lid conical surface, overflow on the lid conical surface and be evenly distributed with multiple jet orifice 12b; Overflow case top cover 14a points to jet orifice 12b position corresponding be circumferentially at least provided with a visor 17.After material enters conically shaped 6 bottom from feed pipe 13, to the flowing underneath of conical floor 7 under centrifugal action, feed pipe flinger ring 13a plays the effect stoping liquid up; If but the feed rate of feed pipe 13 is excessive, exceed the disposal ability of swash plate grader D1, material upwards will choke along conically shaped 6, upwards spray from the jet orifice 12b overflowed the lid conical surface, be mapped on visor 17, operating personnel can observe this phenomenon from device external, suitably reduce feed rate, thus both can ensure that grader worked under comparatively large discharge, flow excess load can be avoided again.

The armature spindle 2a upper end of mair motor 2 is connected with up-small and down-big deflection cone 2b, and the lower surface of deflection cone 2b is pressed on the diapire of rotary drum body 5; Radially evenly be provided with multiple tracks charging shunting gusset 6b in the inner chamber of conically shaped 6 and the underlying space of conical floor 7 and the underlying space of conically shaped inner chamber and conical floor 7 is separated into multiple independently charging runner; Charging shunting gusset 6b and conically shaped gusset 6a one_to_one corresponding and be positioned in identical phase place outward, the lower end of each charging runner is communicated with swash plate through hole 9a one_to_one corresponding respectively.Deflection cone 2b can reduce material to resistance during conical floor 7 flowing underneath, and material flow path is divided into multiple unit by the fin on charging shunting gusset 6b, taper swash plate 9 and the outer gusset 6a of conically shaped, makes between each unit separate, avoids the disorder in flow field.

Be provided with lower disc 8 between the taper swash plate 9 of bottom and conical floor 7, between the taper swash plate 9 of top layer and swash plate gland 11, be provided with disc 10, lower disc 8 be circumferentially respectively equipped with disc through hole with swash plate through hole 9a one_to_one corresponding and mutually through.The upper and lower surface of upper disc 10 and lower disc 8 can be parallel to each other, also can be in a certain angle, changes the upper disc 10 of different angles and lower disc 8, the drift angle of taper swash plate 9 can be changed, to adapt to different mineral better, substantially increase the versatility of grader, reduce equipment investment.Under normal circumstances, the drift angle of grader taper swash plate is 90 ° ~ 120 °, and spacing is 2 ~ 10mm.

Be provided with overflow between the upper port overflowing lid 12 and swash plate gland 11 and regulate plate 12c, overflow regulates between the inner periphery of plate 12c and the outer wall of conically shaped 6 and leaves gap.Overflow regulates plate 12c to the insertion depth of overflow ducts, determine the uninterrupted of light phase material, overflow flow velocity is avoided to cause classification insufficient too soon, the overflow changing different size regulates plate, just can adapt to different mineral better, substantially increase the versatility of grader, reduce equipment investment.

Be separately installed with underflow nozzle 5b in rotary drum underflow opening 5a, the inner termination of underflow nozzle 5b is embedded with anti-wearing liner 5b1 respectively, the inner face of anti-wearing liner 5b1 is respectively equipped with bush ring connected in star 5b2.Because the wearing and tearing of concentrated phase material to underflow nozzle 5b are larger, the inner termination of underflow nozzle 5b arranges the service life that anti-wearing liner 5b1 can extend underflow nozzle 5b; In use, amass in bush ring connected in star 5b2 and expired ore pulp material, first ore pulp deposit bears the impact of concentrated phase material to equipment, defines with the situation of thing mill thing, extends the service life of underflow nozzle 5b further.

The bottom excircle of rotary drum body 5 is provided with rotary drum body counterweight tank 5c, and the middle part outer step of swash plate gland 11 is provided with gland counterweight tank 11a, rotary drum body counterweight tank 5c and gland counterweight tank 11a respectively with rotary drum body coaxial line, and be T-slot.Setting-in balancing weight in rotary drum body counterweight tank 5c and gland counterweight tank 11a, can regulate the dynamic balancing of rotary drum body easily, reduces grader vibration at work, the service life of extension device.

The adpting flange place of overflow case 14 and underflow case 18 is provided with safety door and protects interrupteur SW 1, once overflow case 14 departs from underflow case 18, the normally closed interlock that safety door protects interrupteur SW 1 will disconnect.

Rotary drum case inner chamber and the just right position of rotary drum underflow opening 5a are provided with pulse signal detection interrupteur SW 2, drum assembly rotates a circle, pulse signal detection interrupteur SW 2 will detect the pulse equal with rotary drum underflow opening 5a number, when part rotary drum underflow opening blocks, the umber of pulse that pulse signal detection interrupteur SW 2 detects will reduce, during lower than setting number, the normally open contact of pulse signal detection interrupteur SW 2 will close.

The bearing portion of mair motor 2 is provided with the temperature signal sense switch PTC1 of detection mair motor bearing temperature, and when temperature exceedes setting value, the normally open contact of temperature signal sense switch PTC1 will be connected.

The upper end cover of mair motor and the connecting portion of base are provided with the vibration signal sense switch SW3 detecting mair motor and vibrate, and when mair motor vibration is excessive, the normally open contact of vibration signal sense switch SW3 will be connected.

As shown in figure 11, the control system of swash plate grader of the present invention, comprise the temperature signal sense switch PTC1 of detection grader mair motor bearing temperature and the vibration signal sense switch SW3 of detection mair motor vibration, the pulse signal detection interrupteur SW 2 and safety relay SA1, the safety relay SA1 that also comprise detection grader rotary drum underflow opening jet can select Siemens 3TK28 safety relay.Be connected to after the coils connected in series of pulse signal detection interrupteur SW 2 and very first time relay K T1 between the live wire of control loop and zero line; Be connected between the live wire of control loop and zero line after the coils connected in series of vibration signal sense switch SW3 and the second time relay KT2; Be connected between the live wire of control loop and zero line after the coils connected in series of temperature signal sense switch PTC1 and the 3rd time relay KT3; The power input A1 of safety relay SA1 is connected with the live wire of control loop, between power input A2 and zero line by fuse one F1.

The sender end T1 of safety relay first signal element and receiving terminal IN1 phase short circuit, the sender end T2 of the secondary signal unit of safety relay and receiving terminal IN2 phase short circuit; The normally closed interlock of very first time relay K T1, the second time relay KT2 and the 3rd time relay KT3 is in series with between the sender end T3 of the 3rd signal element of safety relay and receiving terminal IN3.

The upper pile crown 41 of first normally closed interlock of safety relay SA1 is connected with the live wire of control loop by fuse two F2, is connected after the lower pile crown 42 of the first normally closed interlock of safety relay is connected with signal lamp LP1 with zero line.

The upper pile crown 43 of the first normally open contact of safety relay is connected with the live wire of control loop by fuse three F3, the lower pile crown 44 of the first normally open contact is connected with the upper pile crown 23 of the second normally open contact, after the lower pile crown 24 of the second normally open contact and the coils connected in series of scram button SB1, stop button SB2, start button SB3 and mair motor control relay CM1, be connected with zero line; The self-keeping contact CM1-1 of mair motor control relay is connected in parallel on the two ends of start button SB3.SR SB4 is in series with between the reset signal unit 51/52 of safety relay.

Under normal circumstances, the voltage signal that the sender end T1 that the receiving terminal IN1 of the first signal element receives the first signal element sends, the voltage signal that the sender end T2 that the receiving terminal IN2 of secondary signal unit receives secondary signal unit simultaneously sends, then the first normally open contact of safety relay closes.Second normally open contact of the voltage signal that the sender end T3 that the receiving terminal IN3 of the 3rd signal element receives the 3rd signal element sends then safety relay closes.

First, second and third signal element is all in conducting state, and the first normally closed interlock of safety relay disconnects, and signal lamp LP1 does not work.

After pressing start button SB3, the coil of mair motor control relay CM1 obtains electric, and mair motor starts, the self-keeping contact CM1-1 adhesive self-insurance of mair motor control relay.

When pulse signal detection interrupteur SW 2 detects the umber of pulse weekly of rotary drum underflow opening lower than when setting number, the normally open contact of pulse signal detection interrupteur SW 2 closes, the coil of very first time relay K T1 obtains electric, and the normally closed interlock time delay of very first time relay K T1 disconnects; When mair motor vibration is excessive, the normally open contact of vibration signal sense switch SW3 is connected, and the coil of the second time relay KT2 obtains electric, and the normally closed interlock time delay of the second time relay KT2 disconnects; When mair motor bearing temperature exceedes setting value, the coil of normally open contact connection the 3rd time relay KT3 of temperature signal sense switch PTC1 obtains electric, and the normally closed interlock time delay of the 3rd time relay KT3 disconnects; As long as the above-mentioned normally closed interlock of first, second and third time relay has a disconnection, the voltage signal that the sender end T3 that then the receiving terminal IN3 of the 3rd signal element does not receive the 3rd signal element sends, second normally open contact of safety relay disconnects, the coil losing electricity of mair motor control relay CM1, mair motor is out of service; First normally closed interlock of safety relay closes, and signal lamp LP1 lights, and sends signal.After failture evacuation, press SR SB4, then safety relay resets.

Between the overflow case of swash plate grader D1 and underflow case, safety door is installed and protects interrupteur SW 1, the first normally closed interlock SW1-1 that safety door protects switch is connected between the first signal element T1/IN1 of safety relay, and the second normally closed interlock SW1-2 that safety door protects switch is connected between the secondary signal unit T2/IN2 of safety relay.When overflow case is separated with underflow case, first normally closed interlock SW1-1 and the second normally closed interlock SW1-2 of safety door guarantor switch will disconnect, the voltage signal that the sender end T1 that the receiving terminal IN1 of the first signal element does not receive the first signal element sends, or the voltage signal that the sender end T2 that the receiving terminal IN2 of secondary signal unit does not receive secondary signal unit sends, then the first normally open contact of safety relay disconnects, mair motor is out of service, and synchronous signal indicator lamp LP1 lights.

The normally closed interlock of electrothermal relay Q1 is also in series with between 3rd signal element T3/IN3 of safety relay.When the load of mair motor is larger, when there is overcurrent, the normally closed interlock of electrothermal relay Q1 disconnects, the voltage signal that the sender end T3 that the receiving terminal IN3 of safety relay the 3rd signal element also can be made not receive the 3rd signal element sends, second normally open contact of safety relay disconnects, the coil losing electricity of mair motor control relay CM1, mair motor is out of service; First normally closed interlock of safety relay closes, and signal lamp LP1 lights, and sends signal.

The graded desliming technique of MICA of the present invention, in turn includes the following steps: (1) MICA ore pulp enter primary vibration sieve S1 carry out one-level screening, primary vibration sieve S1 partition size be 0.5mm; (2) the primary vibration sieve oversize more than 0.5mm grade enters next workshop section, and the primary vibration sieve screenings below 0.5mm grade enters agitator tank T1; Agitator tank T1 stir evenly after ore pulp send into 2.0mm filter L1 impurity elimination by delivery pump B1; (4) the ore pulp after impurity elimination enters swash plate grader and carries out graded desliming; (5) grader sand setting is discharged from the underflow discharging opening of swash plate grader, and the Fine fraction of ore mud of grade less than 38 μm is discharged from the overflow discharging opening of swash plate grader and entered mine tailing; (6) grader sand setting enters secondary vibration sieve S2 and again sieves, and secondary vibration sieve S2 partition size is that the secondary vibration sieve screenings of below 0.3mm, 0.3mm grade enters mine tailing, and the oversize of secondary vibration sieve S2 enters next workshop section.

The foregoing is only the better possible embodiments of the present invention, non-ly therefore limit to scope of patent protection of the present invention.In addition to the implementation, the present invention can also have other embodiments, and all employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop in the protection domain of application claims.The present invention can pass through without the technical characteristic described or adopt existing techniques in realizing, does not repeat them here.

Claims (10)

1. the graded desliming system of a MICA, comprise primary vibration sieve and secondary vibration sieve, it is characterized in that: also comprise agitator tank, delivery pump, filter and swash plate grader, the screenings outlet of described primary vibration sieve is connected with the entrance of described agitator tank, the outlet of described agitator tank is connected with the entrance of described delivery pump, described conveying delivery side of pump is connected with the entrance of described filter, the outlet of described filter is connected with the charging aperture of described swash plate grader, the overflow discharging opening of described swash plate grader is connected with tail-mineral pipeline, the entrance that underflow discharging opening and the described secondary vibration of described swash plate grader are sieved is connected, the screenings outlet of described secondary vibration sieve is connected with tail-mineral pipeline.

2. the graded desliming system of MICA according to claim 1, it is characterized in that: described swash plate grader comprises rotary drum case and is positioned at the drum assembly of rotary drum case inner chamber, described rotary drum case is surrounded by superposed overflow case and the underflow case that is positioned at bottom and forms, the top of described overflow case be fornix shape and top center by overflow case top closure, the bottom, periphery of described overflow case is provided with described overflow discharging opening, and the bottom, periphery of described underflow case is provided with described underflow discharging opening; The center of described overflow case top cover is plugged with feed pipe, and the axis of the lower end edge drum assembly of described feed pipe is inserted into the inner chamber bottom of drum assembly, and the lower end periphery of described feed pipe is provided with the feed pipe flinger ring stoping liquid upper reaches; The mid diameter maximum of described drum assembly is evenly distributed with multiple rotary drum underflow opening, and described rotary drum underflow opening is connected by runner with described underflow discharging opening; The top of described drum assembly is circumferentially evenly distributed with multiple rotary drum overfall, and described rotary drum overfall is connected by runner with described overflow discharging opening; The bottom centre of described drum assembly is fixed on the armature spindle upper end of mair motor, and described mair motor is fixed on the inner chamber of base, and the upper port of described base is fixedly connected with the lower end of described underflow case.

3. the graded desliming system of MICA according to claim 2, it is characterized in that: the inner chamber of described overflow case is provided with overflow inner casing, described overflow inner casing envelope is in the upper periphery of described drum assembly, the top of described overflow inner casing is connected with inner casing apical ring, and described inner casing apical ring is positioned at the lower outer of described rotary drum overfall; Be interconnected by overflow discharging ring between described overflow inner casing and described overflow case, described overflow discharging ring to round and minimum position is docked with described overflow discharging opening along the chuck of described overflow case in the shape of a spiral; The inner chamber of described underflow case is provided with underflow inner casing, described underflow inner casing envelope is in the lower, outer perimeter of described drum assembly, the top of described underflow inner casing is positioned at inside the below of described rotary drum underflow opening, be interconnected by underflow discharging ring between described underflow inner casing and described underflow case, described underflow discharging ring to round and minimum position is docked with described underflow discharging opening along the chuck of described underflow case in the shape of a spiral.

4. the graded desliming system of MICA according to claim 2, it is characterized in that: the bottom centre region of described drum assembly is upwards recessed to form up-small and down-big and is the rotary drum cavity in isosceles trapezoid cross section, in described rotary drum cavity, rotary drum fan is installed, described rotary drum fan is the low taper in height periphery, center, and the center of described rotary drum fan is fixed on the armature spindle of described mair motor; The inner chamber of described base is provided with the base inner casing with base coaxial line, be interconnected by base gusset between described base inner casing and the internal perisporium of base, the upper end cover of described mair motor stretches out the periphery of motor body and is fixedly connected in the upper port of described base inner casing, described mair motor upper end cover is circumferentially evenly distributed with multiple motor upper cover air vent, the fresh air inlet that the inner chamber lower circumference of described base being respectively equipped with multiple and described base inner casing communicates near outer rim; The highest portion position of described underflow discharging ring is lower than the upper limb of described underflow inner casing; The below of described rotary drum fan is provided with drip tray, described drip tray is low inside and high outside taper, the inner edge of described drip tray is provided with the flanging upwards bent, described flanging embeds in the annular groove of described rotary drum fan lower surface, the periphery of described drip tray is provided with the annular deep gouge to lower recess, the middle part of described underflow inner casing short transverse is provided with spilled water hole, described spilled water hole communicates with the bottom of described annular deep gouge, and the axis of described spilled water hole and the axis of described underflow discharging opening are positioned at same perpendicular.

5. the graded desliming system of MICA according to claim 3, is characterized in that: described drum assembly comprises rotary drum body, and described rotary drum body is the cydariform that upper and lower two ends diameter is little, middle part diameter is large; The inner chamber of described rotary drum body is provided with the swash plate support with rotary drum body coaxial line, and the center of described swash plate support is provided with up-small and down-big conically shaped, and the lower end of described feed pipe is inserted into the inner chamber bottom of described conically shaped; The periphery, bottom of described conically shaped is connected with up-small and down-big conical floor, and the lower edge of described conical floor is supported on the inwall of described rotary drum body, leaves charging space between the below of described conical floor and the bottom of described rotary drum body; The outer wall of described conically shaped is radially evenly provided with the outer gusset of many conically shapeds, and form upper circulation road respectively between the outer gusset of adjacent two conically shapeds, the upper end of described upper circulation road communicates with corresponding described rotary drum overfall respectively; The top of described conical floor is stacked with multiple up-small and down-big and taper swash plate that shape size is identical successively, the upper surface of each taper swash plate is provided with multiple tracks and is radially uniformly distributed and highly equal fin, the outer gusset one_to_one corresponding of described fin and described conically shaped and be positioned in identical phase place, the inner periphery of each taper swash plate is fixed on the outer gusset of described conically shaped by keyway; Be respectively equipped with swash plate through hole between the lower end of fin described in adjacent two, each swash plate through hole is distributed in circumferentially same; The lower circumference of described conical floor is provided with multiple chassis through hole, described chassis through hole and described swash plate through hole one_to_one corresponding and mutually through; Swash plate gland is pressed with above the taper swash plate of top layer, the periphery of described swash plate gland is fixed in the upper port of described rotary drum body, the centre of described swash plate gland protrudes upward outside described inner casing apical ring, the upper port of described swash plate gland is provided with and overflows lid, the described centre overflowing lid is higher than lower circumference, the described lower circumference overflowing lid is fixed in the upper port of described swash plate gland, overflows the lower circumference of lid and level points to outside described in each described rotary drum overfall is arranged in.

6. the graded desliming system of MICA according to claim 5, it is characterized in that: described in overflow between the centre of lid and lower circumference and be connected as a single entity by overflowing the lid conical surface, described in overflow on the lid conical surface and be evenly distributed with multiple jet orifice; Described overflow case top cover points to described jet orifice position corresponding be circumferentially at least provided with a visor.

7. the graded desliming system of MICA according to claim 5, is characterized in that: the armature spindle upper end of described mair motor is connected with up-small and down-big deflection cone, and the lower surface of described deflection cone is pressed on the diapire of described rotary drum body; Radially evenly be provided with multiple tracks charging shunting gusset in the inner chamber of described conically shaped and the underlying space of described conical floor and the underlying space of conically shaped inner chamber and described conical floor is separated into multiple independently charging runner; Described charging shunting gusset and described conically shaped gusset one_to_one corresponding and be positioned in identical phase place outward, the lower end of each described charging runner is communicated with described swash plate through hole one_to_one corresponding respectively; Lower disc is provided with between the described taper swash plate of bottom and described conical floor, be provided with disc between the described taper swash plate of top layer and described swash plate gland, described lower disc be circumferentially respectively equipped with disc through hole with described swash plate through hole one_to_one corresponding and mutually through.

8. the graded desliming system of MICA according to claim 5, it is characterized in that: described in overflow lid and described swash plate gland upper port between be provided with overflow and regulate plate, described overflow regulates between the inner periphery of plate and the outer wall of described conically shaped and leaves gap.

9. the graded desliming system of MICA according to claim 5, it is characterized in that: in described rotary drum underflow opening, be separately installed with underflow nozzle, the inner termination of described underflow nozzle is embedded with anti-wearing liner respectively, the inner face of described anti-wearing liner is respectively equipped with bush ring connected in star.

10. the technique adopting the graded desliming system of the MICA according to any one of claim 1 to 9 to carry out MICA desliming, in turn include the following steps: (1) MICA ore pulp enter primary vibration sieve carry out one-level screening, primary vibration sieve partition size be 0.5mm; (2) the primary vibration sieve screenings below 0.5mm grade enters agitator tank; Agitator tank stir evenly after ore pulp send into the impurity elimination of 2.0mm filter by delivery pump; (4) the ore pulp after impurity elimination enters swash plate grader and carries out graded desliming; (5) grader sand setting is discharged from the underflow discharging opening of swash plate grader, and the Fine fraction of ore mud of grade less than 38 μm is discharged from the overflow discharging opening of swash plate grader and entered mine tailing; Grader sand setting enter secondary vibration sieve again sieve, secondary vibration sieve classification granularity be below 0.3mm, 0.3mm grade secondary vibration sieve screenings enter mine tailing.