CN104236279A - Dehydrating and drying method for scheelite concentrate and device thereof - Google Patents
Dehydrating and drying method for scheelite concentrate and device thereof Download PDFInfo
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- CN104236279A CN104236279A CN201410466942.9A CN201410466942A CN104236279A CN 104236279 A CN104236279 A CN 104236279A CN 201410466942 A CN201410466942 A CN 201410466942A CN 104236279 A CN104236279 A CN 104236279A
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- fine ore
- white tungsten
- tungsten fine
- dehydrating
- microwave
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Abstract
The invention discloses a dehydrating and drying method for scheelite concentrate and a device thereof. The method comprises the following steps: filtering and dehydrating the scheelite concentrate through a GW type cylindrical external filtering filter (ceramic filter or box-type filter press) to obtain scheelite concentrate of which the water mass ratio is 2-15 percent (the range is adjustable); introducing the filtered scheelite concentrate into microwave equipment capable of generating microwave frequency of 2,400-2,500MHZ; distributing at the thickness of 0.5-5 centimeters (the range is adjustable); statically moving on a polyurethane belt of which the rotating speed is 0-1 meter per minute (the range is adjustable), and performing microwave drying to obtain scheelite concentrate of which the water mass ratio is 0.07-2 percent (the range is adjustable); transporting to a packing workshop through a set of conveying device, and packing through an automatic packing machine to obtain a final qualified scheelite concentrate product. According to the method, a novel process for applying a microwave drying principle to the dehydration and drying of the scheelite concentrate is adopted for the first time, so that the machining cost is low, an operation environment is clean and environmentally friendly, metal loss is little, and remarkable economical benefit and social benefit are achieved.
Description
Technical field
The present invention relates to a kind of dehydrating and drying method of white tungsten fine ore, the invention still further relates to the device of the dehydrating and drying method realizing this white tungsten fine ore.
Background technology
Dry general reference removes the operating procedure of moisture content or other wet parts from wet stock, and it is one of production technology of grasping the earliest of the mankind, one of important procedure that Ye Shi bargh in modern times selects factory to produce.The modes such as hot blast, combustion gas, steam (superheated steam), electrical heating are mostly adopted to heat in current industry, thermograde between thermal source and material is the original motive force of energy transferring, and this heat transfer type from outward appearance to inner essence needs to heat whole material while removing moisture; And the motive force of mass transfer is the gradient of moisture concentration between internal batch and surface, the evaporation of moisture is from material surface, and inner moisture, slowly from diffusion inside to surface, for accelerating rate of drying, then needs higher external temperature to carry out formation temperature gradient.Heating using microwave has the advantages such as inner heating, selective heating.Permittivity ε due to hydrone ' up to 70 ~ 78, much larger than general mineral and compound, in microwave drying process, hydrone is a large amount of microwave of preferential absorption always, form larger vapour pressure at short notice, rapidly effusion material surface, significantly reduce the dry processing time.This drying mode decreases and heats the entirety of material, significantly reduces energy consumption; Meanwhile, due to inside heating, in material, form thermograde from inside to outside, its direction and Water Transport are oppositely identical, facilitate the mass transport process of hydrone greatly, improve drying efficiency.Material belongs to inactive state in dry run, thus reduces dust from flying, keeps the excellent clean environmental protection of environment.Therefore, microwave drying process day by day comes into one's own and is rapidly developed.
Summary of the invention
First technical problem to be solved by this invention be to provide a kind of processing cost low, can qualified products be obtained and the dehydrating and drying method of the few white tungsten fine ore of the clean environmental protection of operating environment, metal loss.
Second technical problem to be solved by this invention is to provide a kind of device realizing the dehydrating and drying method of this white tungsten fine ore.
In order to solve above-mentioned first technical problem, the dehydrating and drying method of white tungsten fine ore provided by the invention, white tungsten fine ore filters through a kind of filter plant, then passes through in a kind of microwave drier cavity, and cloth moves and passes through microwave drying on belt still.
Described white tungsten fine ore is containing WO
3grade quality is 35% ~ 80.5%; Grain class distribution-200 order mass ratio of described white tungsten fine ore is 55% ~ 96%; The moisture content mass ratio of described white tungsten fine ore is at 30%-50%.
Specifically comprise the steps: first, Bai Wuxuan factory Scheelite Flotation concentrate is transported to drying plant after filter plant filters, again, static cloth slowly moves and carries out drying by the microwave device producing microwave on belt, finally, by a set of conveying device, be transported between baling vehicle and packed to obtain white tungsten fine ore qualified products by automatic packaging machine.
Described white tungsten fine ore static fabric thickness on belt is 0.5cm ~ 5cm.
Microwave frequency is 2400-2500MHz, and microwave leakage is less than 1mW/cm
2.
Described belt is rotating speed 0m/min ~ 1m/min.
Described Scheelite Flotation concentrate white tungsten fine ore water content mass ratio after cylinder outside filtering type filter (ceramic filter or chamber-type press filter) carries out filtering means dehydration is 2% ~ 15%.
In order to solve above-mentioned second technical problem, the device realizing the dehydrating and drying method of white tungsten fine ore provided by the invention, a kind of import of microwave drier is docked in the outlet of filter plant, the import of the outlet butt jointing conveyer of described microwave drier, an automatic packing machine is docked in the outlet of conveying device.
Described filter plant comprises: GW type cylinder outside filtering type filter (ceramic filter or chamber-type press filter), filtering vacuum pressure stability is at more than 0.8MPa.
The structure of described microwave drier comprises: distribution device (two bar tooth rolls shape), passive support, dehumidification system, suppression system, antinose-dive leg, cleaning window, cooling pipe, electrical system, microwave cavity, active bracket and feed opening and travelling belt.
Described conveying device is pneumatic conveyer or screw conveying device, and the structure of described pneumatic conveyer comprises: charging aperture, suction nozzle, carrier pipe (lined ceramics pipe), cyclone separator, feed bin, secondary cyclone separator, blower fan and a discharging opening.
Microwave drier technological parameter is: microwave frequency is 2400-2500MHz totally 8 groups, and belt speed is 0-1m/min (scope is adjustable), and spin manifold temperature is for being less than 45 DEG C, and microwave leakage is less than 1mW/cm
2.
Belt is polyurethane belt.
Adopt dehydrating and drying method and the device thereof of the white tungsten fine ore of technique scheme, white tungsten fine ore is after dehydrating, and white tungsten fine ore qualified products water content mass ratio is at 0.07%-2%.
The invention compared with prior art, has the following advantages and good effect:
1. drying effect is remarkable especially.The white tungsten fine ore of water content 2%-15% (scope is adjustable) dries 0.07%-2% (scope is adjustable) only to be needed just can complete for 25 minutes.
2. more more save energy consumption with other drying modes.Electric energy is converted to microwave Concentrate Drying again, and general 1 degree of electric energy removes 0.6t water.
3. tungsten concentrate loss late is low.Through data statistic analysis, white tungsten fine ore is dried loss late and is controlled below 0.5%.
4. this art production process is without dust, to the clean environmental protection of environment.
Accompanying drawing explanation
Fig. 1 is cylinder outside filtering type filtering machine structure schematic diagram.
Fig. 2 is microwave drier structural front view.
Fig. 3 is microwave drier structure left view.
Fig. 4 is pneumatic conveyer structural representation.
Fig. 5 is automatic packing machine structural representation.
Detailed description of the invention
In order to understand the present invention better, further illustrate content of the present invention below in conjunction with embodiment, but the present invention is not limited to following examples, person skilled in the relevant technique, without departing from the spirit and scope of the present invention, various change can also be made.Therefore, all equivalent technical schemes also should belong to category of the present invention, should be limited by each claim.
The dehydrating and drying method of white tungsten fine ore, white tungsten fine ore filters through a kind of filter plant, then passes through in a kind of microwave drier cavity, and cloth moves and passes through microwave drying on belt still.
Described white tungsten fine ore is containing WO
3grade quality is 35% ~ 80.5%; Grain class distribution-200 order mass ratio of described white tungsten fine ore is 55% ~ 96%; The moisture content mass ratio of described white tungsten fine ore is at 30%-50%.
Specifically comprise the steps: first, Bai Wuxuan factory Scheelite Flotation concentrate is transported to drying plant after filter plant filters, again, static cloth slowly moves and carries out drying by the microwave device producing microwave on belt, finally, by the device of a set of pneumatic convey, be transported between baling vehicle and packed to obtain white tungsten fine ore qualified products by automatic packaging machine.
Described white tungsten fine ore static fabric thickness on belt is 0.5cm ~ 5cm.
Microwave frequency is 2400-2500MHz, and microwave leakage is less than 1mW/cm
2.
Described belt is rotating speed 0m/min ~ 1m/min.
It is 2% ~ 15% that described Scheelite Flotation concentrate carries out white tungsten fine ore water content mass ratio after filtering means dehydration through cylinder outside filtering type filter.
See Fig. 1, Fig. 2, Fig. 3, Fig. 4 and Fig. 5, realize the device of the dehydrating and drying method of white tungsten fine ore, a kind of import of microwave drier 2 is docked in the outlet of filter plant, the import of the outlet docking pneumatic conveyer 15 of microwave drier 2, an automatic packing machine 16 is docked in the outlet of pneumatic conveyer 15.
Pneumatic conveyer 15 also can replace with screw conveying device.
Filter plant comprises: GW type cylinder outside filtering type filter 1, GW type cylinder outside filtering type filter is ceramic filter or chamber-type press filter, and filtering vacuum pressure stability is at more than 0.8MPa.
The structure of microwave drier 2 comprises: distribution device 3 (two bar tooth rolls shape), passive support 4, dehumidification system 5, suppression system 6, antinose-dive leg 7, cleaning window 8, cooling pipe 9, electrical system 10, microwave cavity 11, active bracket 12 and feed opening 13 and travelling belt 14, travelling belt 14 is polyurethane belt.Microwave drier technological parameter is: microwave frequency is 2400-2500MHz totally 8 groups, and belt speed is 0-1m/min (scope is adjustable), and spin manifold temperature is for being less than 45 DEG C, and microwave leakage is less than 1mW/cm
2.
The structure of pneumatic conveyer 15 comprises: charging aperture, suction nozzle, carrier pipe (lined ceramics pipe), cyclone separator, feed bin, secondary cyclone separator, blower fan and a discharging opening.
Embodiment 1:
(1) white tungsten flotation concentrate moisture content 40%, adopts the dehydration of vacuum outside filtering type drumfilter, and the white tungsten of output filters concentrate water content 3.85%.
(2) tungsten filtration concentrate uniform distribution is static is laid on polyurethane feed belt, regulates white tungsten fine ore thickness 2.0cm, 6 groups of microwaves, belt speed 0.588m/min.Finally obtain white tungsten fine ore water content 0.07%.
Embodiment 2:
(1) white tungsten flotation concentrate moisture content 50%, adopts the dehydration of vacuum outside filtering type drumfilter, and the white tungsten of output filters concentrate water content 15%.
(2) tungsten filtration concentrate uniform distribution is static is laid on polyurethane feed belt, regulates white tungsten fine ore thickness 1.0cm, 8 groups of microwaves, belt speed 0.488m/min.Finally obtain white tungsten fine ore water content 1.98%.
Embodiment 3:
(1) white tungsten flotation concentrate moisture content 30%, adopts the dehydration of vacuum outside filtering type drumfilter, and the white tungsten of output filters concentrate water content 4.26%.
(2) tungsten filtration concentrate uniform distribution is static is laid on polyurethane feed belt, regulates white tungsten fine ore thickness 3.0cm, 7 groups of microwaves, belt speed 0.568m/min.Finally obtain white tungsten fine ore water content 0.26%.
Embodiment 4:
(1) white tungsten flotation concentrate moisture content 38%, adopts the dehydration of vacuum outside filtering type drumfilter, and the white tungsten of output filters concentrate water content 5.84%.
(2) tungsten filtration concentrate uniform distribution is static is laid on polyurethane feed belt, regulates white tungsten fine ore thickness 2.6cm, 5 groups of microwaves, belt speed 0.668m/min.Finally obtain white tungsten fine ore water content 0.30%.
Embodiment 5:
(1) white tungsten flotation concentrate moisture content 43%, adopts the dehydration of vacuum outside filtering type drumfilter, and the white tungsten of output filters concentrate water content 6.20%.
(2) tungsten filtration concentrate uniform distribution is static is laid on polyurethane feed belt, regulates white tungsten fine ore thickness 1.8cm, 8 groups of microwaves, belt speed 0.436m/min.Finally obtain white tungsten fine ore water content 0.19%.
Claims (10)
1. a dehydrating and drying method for white tungsten fine ore, is characterized in that: white tungsten fine ore filters through a kind of filter plant, then passes through in a kind of microwave drier cavity, and cloth moves and passes through microwave drying on belt still.
2. the dehydrating and drying method of white tungsten fine ore according to claim 1, is characterized in that: described white tungsten fine ore is containing WO
3grade quality is 35% ~ 80.5%; Grain class distribution-200 order mass ratio of described white tungsten fine ore is 55% ~ 96%; The moisture content mass ratio of described white tungsten fine ore is at 30%-50%.
3. the dehydrating and drying method of white tungsten fine ore according to claim 1 and 2, it is characterized in that: specifically comprise the steps: first, Bai Wuxuan factory Scheelite Flotation concentrate is transported to drying plant after filter plant filters, again, static cloth slowly moves and carries out drying by the microwave device producing microwave on belt, finally, by a set of conveying device, be transported between baling vehicle and packed to obtain white tungsten fine ore qualified products by automatic packaging machine.
4. the dehydrating and drying method of white tungsten fine ore according to claim 1 and 2, is characterized in that: described white tungsten fine ore static fabric thickness on belt is 0.5cm ~ 5cm.
5. white tungsten fine ore according to claim 1 and 2 dehydrate process, it is characterized in that: microwave frequency is 2400-2500MHz, described belt is rotating speed 0m/min ~ 1m/min.
6. the dehydrating and drying method of white tungsten fine ore according to claim 1 and 2, is characterized in that: described Scheelite Flotation concentrate after filtration after equipment filtering means dehydration white tungsten fine ore water content mass ratio be 2% ~ 15%.
7. realize the device of the dehydrating and drying method of white tungsten fine ore according to claim 1, it is characterized in that: a kind of import of microwave drier is docked in the outlet of filter plant, the import of the outlet butt jointing conveyer of described microwave drier, an automatic packing machine is docked in the outlet of conveying device.
8. the device of the dehydrating and drying method of white tungsten fine ore according to claim 7, is characterized in that: described filter plant is cylinder outside filtering type filter, and filtering vacuum pressure stability is at more than 0.8MPa.
9. the device of the dehydrating and drying method of the white tungsten fine ore according to claim 7 or 8, is characterized in that: the structure of described microwave drier comprises: distribution device, passive support, dehumidification system, suppression system, antinose-dive leg, cleaning window, cooling pipe, electrical system, microwave cavity, active bracket and feed opening and travelling belt.
10. the device of the dehydrating and drying method of the white tungsten fine ore according to claim 7 or 8, it is characterized in that: described conveying device is pneumatic conveyer or screw conveying device, and the structure of described pneumatic conveyer comprises: charging aperture, suction nozzle, carrier pipe, cyclone separator, feed bin, secondary cyclone separator, blower fan and a discharging opening.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410466942.9A CN104236279A (en) | 2014-08-13 | 2014-09-15 | Dehydrating and drying method for scheelite concentrate and device thereof |
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|---|---|---|---|
| CN201410397296.5 | 2014-08-13 | ||
| CN201410397296 | 2014-08-13 | ||
| CN201410466942.9A CN104236279A (en) | 2014-08-13 | 2014-09-15 | Dehydrating and drying method for scheelite concentrate and device thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110694937A (en) * | 2019-09-26 | 2020-01-17 | 湖南有色新田岭钨业有限公司 | Low-grade dip-dyed skarn type scheelite pre-waste-throwing process |
| CN115875956A (en) * | 2022-12-01 | 2023-03-31 | 文山麻栗坡紫金钨业集团有限公司 | Rapid dehydration drying system |
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| CN1614049A (en) * | 2004-09-30 | 2005-05-11 | 云南驰宏锌锗股份有限公司 | Method and apparatus for drying hydrated germanium dioxide by microwave in extraction |
| US20070271811A1 (en) * | 2004-04-12 | 2007-11-29 | Takaharu Tsuruta | Method And Apparatus For Drying Under Reduced Pressure Using Microwaves |
| CN101722110A (en) * | 2010-01-14 | 2010-06-09 | 中南大学 | Collector for scheelite concentration and use thereof |
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| CN203100405U (en) * | 2012-12-20 | 2013-07-31 | 河南勃达微波设备有限责任公司 | Microwave drying equipment with cooling device |
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- 2014-09-15 CN CN201410466942.9A patent/CN104236279A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002172394A (en) * | 2000-12-05 | 2002-06-18 | Nippon Steel Corp | Method for ss removing treatment of yard wastewater |
| US20070271811A1 (en) * | 2004-04-12 | 2007-11-29 | Takaharu Tsuruta | Method And Apparatus For Drying Under Reduced Pressure Using Microwaves |
| CN1614049A (en) * | 2004-09-30 | 2005-05-11 | 云南驰宏锌锗股份有限公司 | Method and apparatus for drying hydrated germanium dioxide by microwave in extraction |
| CN101722110A (en) * | 2010-01-14 | 2010-06-09 | 中南大学 | Collector for scheelite concentration and use thereof |
| CN102011017A (en) * | 2010-11-19 | 2011-04-13 | 中南大学 | Method for extracting tungsten by decomposing tungsten minerals |
| CN102896049A (en) * | 2012-11-06 | 2013-01-30 | 永利高盛（北京）环保科技有限公司 | Beneficiation method and system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110694937A (en) * | 2019-09-26 | 2020-01-17 | 湖南有色新田岭钨业有限公司 | Low-grade dip-dyed skarn type scheelite pre-waste-throwing process |
| CN115875956A (en) * | 2022-12-01 | 2023-03-31 | 文山麻栗坡紫金钨业集团有限公司 | Rapid dehydration drying system |
| CN115875956B (en) * | 2022-12-01 | 2023-10-13 | 文山麻栗坡紫金钨业集团有限公司 | Quick dehydration drying system |
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Application publication date: 20141224 |