CN105689117A - Concentration magnetic separator and concentration method based on concentration magnetic separator - Google Patents
Concentration magnetic separator and concentration method based on concentration magnetic separator Download PDFInfo
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- CN105689117A CN105689117A CN201610084275.7A CN201610084275A CN105689117A CN 105689117 A CN105689117 A CN 105689117A CN 201610084275 A CN201610084275 A CN 201610084275A CN 105689117 A CN105689117 A CN 105689117A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C1/00—Magnetic separation
- B03C1/02—Magnetic separation acting directly on the substance being separated
- B03C1/16—Magnetic separation acting directly on the substance being separated with material carriers in the form of belts
- B03C1/18—Magnetic separation acting directly on the substance being separated with material carriers in the form of belts with magnets moving during operation
Abstract
The invention provides a concentration magnetic separator and a concentration method based on the concentration magnetic separator. The concentration magnetic separator comprises a groove body, an ore feeding opening located in the bottom face of the groove body, a first magnetic drum, a second magnetic drum, a first transmission drum, a second transmission drum, a first conveyor belt and a second conveyor belt. The first magnetic drum comprises a first magnetic drum outer drum body and a first magnetic system. The second magnetic drum comprises a second magnetic drum outer drum body and a second magnetic system. The first transmission drum drives the first magnetic drum to rotate through the first conveyor belt. The second transmission drum drives the second magnetic drum to rotate through the second conveyor belt. The first magnetic system and the second magnetic system are opposite in rotation direction so that magnetite in the groove body can be conveyed to the first conveyor belt and the second conveyor belt. By the adoption of the concentration magnetic separator and the concentration method based on the concentration magnetic separator, the concentration efficiency of strongly magnetic mineral particles can be improved effectively.
Description
Technical field
The present invention relates to technical field of magnetic separation equipment, particularly relate to and a kind of concentrate magnetic separator and the method for concentration based on this concentration magnetic separator。
Background technology
In the whole technical process in ore dressing plant, ore crushing technique and grinding process carry the task of providing suitable selected raw meal particle size into follow-up sorting operation。The main task that grinding process undertakes makes the abundant monomer dissociation of mineral exactly, and material crosses pulverizing as far as possible less, and product granularity is uniform。From economic benefit aspect, in ore dressing plant, ore crushing technique accounts for the 30% of full factory investment, the ring that grinding process is important especially with the investment of grinding process。
During ore grinding, if ore milling concentration is low, ore pulp flowing is fast, and material level of adhesion around steel ball is poor, and steel ball is weak to impact and the abrasive action of material, and ore discharge granularity qualification rate is low, and grinding efficiency can not get playing；If ore milling concentration is high, ore pulp flowing is slow, and material level of adhesion around steel ball is good, and steel ball is strong to impact and the abrasive action of material, but easily causes material and cross pulverizing, is unfavorable for improving grinding machine treating capacity。Particularly in the iron ore beneficiating factory adopting Stage grinding separation technology, the feed ore concentration of two-stage nitration ball mill is the emerging factor being concerned, in actual production process, the ore deposit of giving of two-stage nitration ball mill is made up of the closed cycle load of ball mill and the concentrate of a magnetic separation, in order to meet the requirement of respective function, the high-frequency screen (can also be spiral classifier or hydrocyclone) of the closed circuit classification of two-stage nitration ball mill and a magnetic separation are desirable that corresponding discharging flushing water, the pulp density making two-stage nitration ball mill mineral-feeding is non-normally low, the ore pulp of low concentration is directly entered two-stage nitration ball mill and carries out ore deposit process of regrinding, result in two-stage nitration ball milling feed ore concentration cannot ensure, have impact on the production efficiency of ball mill operation, the production efficiency making whole system is not in full use。
Existing a kind of concentration magnetic separator, has the advantage such as the concentration height of product, high, reliable, the long service life of structure of the response rate, can be used for sorting of strongly magnetic mineral, and the thickening operation of two-stage nitration ball mill mineral-feeding and the dense media of coal preparation plant reclaim。
Existing another kind of concentration magnetic separator, the enrichment method being generally used in mineral processing circuit low concentration mineral, it is possible to effectively reduce ore grinding cost。It is simultaneously used in beneficiation flowsheet and also has the higher response rate。
The many magnetic pole concentration magnetic separators of the strong magnetic of existing one, can reduce thickness of feed layer during magnetic upset, it is to avoid material produces in filter pressing roller bottom to pile up, it is ensured that the disposal ability of equipment, fundamentally avoids mine tailing and runs the generation of ferrum, it is ensured that the economic benefit in ore dressing plant。
Existing a kind of efficient concentration type magnetic separator for condensation of strong magnetic mineral, the product design after dehydration is high, concentrated effect is good；Cylinder rotation rate continuously adjustabe, simple to operate, use flexibly, and can be used for other thickening operations in assorting room。This concentration magnetic separator has the advantages that the product solids content after concentration is high, concentrated effect is good。
In summary, the concentration magnetic separator of at present application mainly has single cylinder concentration magnetic separator, single cylinder with pressing plate and filter pressing roller to concentrate magnetic separator etc.。Above-mentioned concentration magnetic separator, owing to magnetic material is subject to pressing plate and the extruding of filter pressing roller in the process of fortune ore deposit, result in a part of fine granular materials and cannot pass through pressing plate and filter pressing roller, solid accumulation phenomenon is produced at filter pressing roller place, have impact on the disposal ability of equipment, time serious, fine granular materials is extruded into mine tailing district, causes that concentration magnetic separator mine tailing runs ferrum, have impact on the economic benefit in ore dressing plant；Owing to adding auxiliary equipment, cause that manufacturing cost is higher, and the enrichment method efficiency of fine grained, low concentration material is low。
Summary of the invention
Based on the defect of prior art, the present invention provides a kind of and concentrates magnetic separator and the method for concentration based on this concentration magnetic separator, technical problem magnetic mineral thickening efficiency is low to solve prior art。
First aspect, the present invention provides a kind of concentration magnetic separator, including: cell body, is positioned at the feed port of described cell body bottom surface, the first magnet drum, the second magnet drum, the first driving drum, the second driving drum, the first feed belt and the second feed belt；
Described first magnet drum includes the first magnet drum outer cylinder body and the first magnetic system coaxial with described first magnet drum outer cylinder body, and described second magnet drum includes the second magnet drum outer cylinder body and the second magnetic system coaxial with described second magnet drum outer cylinder body；
Described first driving drum drives described first magnet drum to rotate by described first feed belt, and described second driving drum drives described second magnet drum to rotate by described second feed belt；
The direction of rotation of described first magnetic system and described second magnetic system is contrary, to be brought to by the magnetic iron ore in described cell body on described first feed belt and described second feed belt。
Alternatively, described first magnet drum and described second magnet drum are positioned at described cell body, and described first magnet drum is parallel with the axis of described second magnet drum and belongs to same horizontal plane。
Alternatively, there is gap between the downside of described first feed belt and downside and the upper edge of described cell body of described second feed belt。
Alternatively, the disk pack angle of described first magnetic system and described second magnetic system is 360 °。
Alternatively, the rotating speed of described first magnetic system is more than the rotating speed of described first magnet drum outer cylinder body, and the rotating speed of described second magnetic system is more than the rotating speed of described second magnet drum outer cylinder body。
Alternatively, described first magnet drum and described second magnet drum are arranged on slide device, to regulate the distance between described first magnet drum and described second magnet drum。
Alternatively, being provided with two downflow weirs inside described cell body, said two downflow weir is positioned at the both sides of described feed port, and the height of described cell body is more than the height of each downflow weir。
Alternatively, described concentration magnetic separator also includes multiple buncher, and the plurality of buncher connects and regulate the rotating speed of described first magnetic system, described second magnetic system, described first driving drum and described second driving drum respectively。
Alternatively, being additionally provided with two overfalls below described cell body, said two overfall lays respectively at the both sides of said two downflow weir。
Second aspect, the present invention provides a kind of method for concentration based on the concentration magnetic separator described in any of the above-described embodiment, including:
First driving drum and the second driving drum rotate respectively, to drive the first feed belt and the second feed belt to carry out transmission；
First magnetic system and the second magnetic system rotate respectively, to be adsorbed onto by strongly magnetic mineral granule in cell body on described first feed belt and described second feed belt respectively, it is achieved the concentration to strongly magnetic mineral granule, described strongly magnetic mineral granule is entered by feed port。
As shown from the above technical solution, the concentration magnetic separator of the present invention and the method for concentration based on this concentration magnetic separator, adopt double; two magnet drum condensing mode, and strongly magnetic mineral granule is sent into from the lower section of cell body, strongly magnetic mineral granule is adsorbed to double; two magnet drum conveyer belt surface immediately, and strongly magnetic mineral granule is preferentially selected, so that strongly magnetic mineral granule separates in advance with moisture, be conducive to follow-up concentration, not only increase thickening effect, and improve the disposal ability of equipment。
Accompanying drawing explanation
The front view of the concentration magnetic separator structure that Fig. 1 provides for one embodiment of the invention；
The front view of the concentration magnetic separator structure that Fig. 2 provides for another embodiment of the present invention；
The top view of the concentration magnetic separator structure that Fig. 3 provides for one embodiment of the invention；
The schematic flow sheet of the method for concentration based on concentration magnetic separator that Fig. 4 provides for one embodiment of the invention。
Description of reference numerals
Magnet drum 4 first magnet drum outer cylinder body 40 first magnetic system 41 first of cell body 1 feed port 2 first magnet drum 3 first magnet drum outer cylinder body 30 first magnetic system 31 second feed belt 5 second feed belt 6 first driving drum 7 second driving drum 8 overfall 1 overfall 2 91 downflow weir 1 downflow weir 2 101 hopper 1 hopper 2 111 frame 12 buncher 13。
Detailed description of the invention
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail。Following example are used for illustrating the present invention, but are not limited to the scope of the present invention。
Fig. 1 illustrates the structural representation concentrating magnetic separator that one embodiment of the invention provides。As it is shown in figure 1, the concentration magnetic separator of the present embodiment includes: cell body 1, feed port the 2, first magnet drum the 3, second magnet drum the 4, first driving drum the 7, second driving drum the 8, first feed belt 5 being positioned at described cell body 1 bottom surface and the second feed belt 6。
In the present embodiment, feed port 2 being arranged on the lower section of cell body 1, be connected by pipeline with cell body 1, magnetic iron ore is adsorbed to two feed belt surfaces immediately, and magnetic iron ore is preferentially selected, so that magnetic iron ore separates in advance with water, is conducive to follow-up concentration。Feed port 2 is connected with to slag stock pump, and mine-supplying quantity and feed ore concentration can be regulated by slag stock pump。
In the present embodiment, the making material of cell body 1 is that non-magnet material makes, such as non-magnetic rustless steel S304, engineering plastics, fiberglass etc.。
Described first magnet drum 3 includes the first magnet drum outer cylinder body 30 and the first magnetic system 31 coaxial with described first magnet drum outer cylinder body 30, and described second magnet drum 4 includes the second magnet drum outer cylinder body 40 and the second magnetic system 41 coaxial with described second magnet drum outer cylinder body 40。
Described first driving drum 7 drives described first magnet drum 3 to rotate by described first feed belt 5, and described second driving drum 8 drives described second magnet drum 4 to rotate by described second feed belt 6。
In the present embodiment, the linear velocity of the first feed belt 5 and the second feed belt 6 ranges for 0.1-1.0m/s。
The linear velocity of the first feed belt 5 and the second feed belt 6 is not defined by the present embodiment, and those skilled in the art can arrange the linear velocity of the first feed belt 5 and the second feed belt 6 according to actual needs。
The direction of rotation of described first magnetic system 31 and described second magnetic system 41 is contrary, to be brought to by the magnetic iron ore in described cell body 1 on described first feed belt 5 and described second feed belt 6。
The material of magnetic system can be selected for multiple magnetic material and makes, and neodymium-iron-boron magnetic material is preferably used is formed to extrude magnetic pole form in the present embodiment, and magnetic system baseboard material selects Q235 steel, it is possible to ensures as far as possible that higher magnetic induction and is easy to the installation of magnetic system。First magnetic system 31 and the second magnetic system 41 magnetic pole respectively N-S circumferential array, when the first magnetic system 31 and 41 collaborative work of the second magnetic system, it rotates the magnetic pole one produced is N pole, and one is S pole, is N-S arranged type。So making to present attracting state between two magnetic systems, magnetic induction is strong。
In the present embodiment, the magnetic induction on the first magnet drum outer cylinder body 30 and the second magnet drum outer cylinder body 40 surface ranges for 0.1-0.6T。
The magnetic induction of the first magnet drum outer cylinder body 30 and the second magnet drum outer cylinder body 40 surface is not defined by the present embodiment, and those skilled in the art can arrange the magnetic induction on the first magnet drum outer cylinder body 30 and the second magnet drum outer cylinder body 40 surface according to actual needs。
Magnetic iron ore is fed in cell body 1 by feed port 2, in cell body 1, magnetic iron ore is adsorbed on the first feed belt 5 and second feed belt 6 of the first magnet drum outer cylinder body 30 and the second magnet drum outer cylinder body 40 outer surface under the magnetic field force effect of the first magnetic system 31 and the generation of the second magnetic system 41, and is rotated up along with the rotation of the first feed belt 5 of the first magnetic system 31 and the second magnetic system 41 and the first magnet drum outer cylinder body 30 outer surface and the first feed belt 6 of the second magnet drum outer cylinder body 40 outer surface。When magnetic iron ore turns to the position between the first magnet drum 3 and the second magnet drum 4, adsorbed magnetic iron ore sloughs moisture under magnetic field force and action of gravity。Magnetic iron ore after dehydration is transmitted to specifying position by the first feed belt 5 and the second feed belt 6 respectively, drops under gravitational and centrifugal forces and becomes concentrated product, thus realizing magnetic iron ore to sort the thickening of product。
The concentration magnetic separator of the present embodiment, adopt the condensing mode of double; two magnet drum, can produce to be better than the magnetic field intensity of the magnetic field intensity of magnetic material own, it is thus able to provide higher magnetic field force, the magnetic iron ore absorbability formed is big, the concentrate concentration obtained after concentration is high, not only increases thickening effect, and improves the disposal ability of equipment。And magnetic iron ore sends into from the lower section of cell body so that magnetic iron ore separates in advance with water, is conducive to follow-up concentration。
Fig. 2 illustrates the front view concentrating magnetic separator structure that another embodiment of the present invention provides。Compared to the concentration magnetic separator shown in Fig. 1, the concentration magnetic separator of the present embodiment also includes: overfall 1, overfall 2 91, downflow weir 1, downflow weir 2 101, hopper 1 and hopper 2 111。
Downflow weir 1 and downflow weir 2 101 are positioned at the inside of cell body 1, and downflow weir 1 is positioned at the left side of feed port 2, and downflow weir 2 101 is positioned at the right side of feed port 2, and the height of cell body 1 is more than the height of each downflow weir。
Region between downflow weir 1 and downflow weir 2 101 is called sorting district, and the first magnet drum 3 and the second magnet drum 4 are positioned at sorting district。
Being additionally provided with overfall 1 and overfall 2 91 below cell body 1, overfall 1 is positioned at the left side of downflow weir 1, and overfall 2 91 is positioned at the right side of downflow weir 2 101。
When the liquid level sorted in district exceedes the height of downflow weir, water flows out cell body by downflow weir respectively through overfall one and overfall two。
Hopper 1 is positioned at the left side of the first driving drum 7, and hopper 2 111 is positioned at the right side of the second driving drum 8, is respectively used to receive the magnetic iron ore of the concentration on the first feed belt 5 and the second feed belt 6。
In the present embodiment, the direction of rotation of the first magnetic system 31 and the second magnetic system 41 is contrary, to be brought to by the magnetic iron ore sorting district in cell body 1 on first feed belt 5 and the second feed belt 6。
In the present embodiment, the downside of described first feed belt 5 and there is gap between downside and the upper edge of described cell body 1 of described second feed belt 6。
Namely when the height of the first driving drum 7 axis lower than the height of the axis of the first magnet drum 3 or the height of the second driving drum 8 axis lower than the height of the second magnet drum axis 4 time, a roller supporting tube is increased in the downside of the downside of the first feed belt 5 and the second feed belt 6, the lower side frame of the downside of the first feed belt 5 and the second feed belt 6 is high so that the downside of the first feed belt 5 and the downside of the second feed belt 6 are higher than the upper edge of cell body 1。
In the present embodiment, the disk pack angle of the first magnetic system 31 and the second magnetic system 41 is 360 °。
Its objective is to enable magnetic system to continuously perform concentration operation, improve the work efficiency of concentration magnetic iron ore, and completely avoid mine tailing race ferrum。
In the present embodiment, the rotating speed of the first magnetic system 31 is more than the rotating speed of the first magnet drum outer cylinder body 30, and the rotating speed of the second magnetic system 41 is more than the rotating speed of the second magnet drum outer cylinder body 40。
The magnetic iron ore adsorbed by magnetic field force can carry out relative sliding on feed belt and between feed belt, so that the magnetic iron ore of concentration is moisture lower, improves work efficiency。The speed discrepancy of magnetic system and magnet drum outer cylinder body enhances magnetic inverting action, improves thickening ability。
In the present embodiment, the range of speeds of the first magnetic system 31 and the second magnetic system 41 is 1-150r/min, and the speed discrepancy of the first magnetic system 31 and the first magnet drum outer cylinder body 30 and the second magnetic system 41 and the second magnet drum outer cylinder body 40 speed discrepancy scope are 1-120r/min。
The rotating speed of the first magnetic system 31 and the second magnetic system 41 is not defined by the present embodiment, and those skilled in the art can arrange the rotating speed of the first magnetic system 31 and the second magnetic system 41 according to actual needs。
The equal scalable of rotating speed of first the 31, second magnetic system of magnetic system the 41, first magnet drum outer cylinder body 30 and the second magnet drum outer cylinder body 40, to adapt to the user regulatory demand to device parameter。
In the present embodiment, the first magnet drum 3 and the second magnet drum 4 are arranged on slide device, to regulate the distance between the first magnet drum 3 and the second magnet drum 4。
In the present embodiment, the distance range between the first magnet drum 3 and the second magnet drum 4 is 10-200mm。
Distance between first magnet drum 3 and the second magnet drum 4 is not defined by the present embodiment, and those skilled in the art can arrange the distance between the first magnet drum 3 and the second magnet drum 4 according to actual needs。
In the present embodiment, the height of the first driving drum 7 and the height of the second driving drum 8 are identical。
In the present embodiment, the diameter of the first driving drum 7 is less than the diameter of the first magnet drum outer cylinder body 30, and the diameter of the second driving drum 8 is less than the diameter of the second magnet drum outer cylinder body 40。
The concentration magnetic separator of the present embodiment, has the advantage that
(1) feedstock concentrations, double; two magnet drum spacing, magnetic system and the magnet drum equal scalable of outer cylinder body rotating speed, it is possible to according to material properties and technical requirement flexible, operable scope is wide, strong adaptability；
(2) simple in construction, easy to operate, each building block can produce in factory modularization, Assembling, it is simple to transport；
(3) utilizing the absorption of high-intensity magnetic field power and strengthening magnetic upset, after dehydration, concentrate concentration increase rate is big；
(4) adjust the technological parameter of concentration magnetic separator, adjustable concentrated product technical specification, produce and regulate convenient management。
Fig. 3 illustrates the top view concentrating magnetic separator structure that one embodiment of the invention provides。As it is shown on figure 3, the concentration magnetic separator of the present embodiment also includes frame 12, each buncher 13。
Each buncher is respectively used to regulate the rotating speed of first the 31, second magnetic system of magnetic system the 41, first driving drum the 7, second driving drum 8, thus meeting the user requirement to rotating speed。
The concentration magnetic separator of the present embodiment, can be adjusted the rotating speed of each magnetic system and driving drum respectively by buncher, meets user needs to different rotating speeds at scheduling and planning and when using。
Fig. 4 illustrates the schematic flow sheet based on the method for concentration concentrating magnetic separator shown in any of the above-described embodiment that one embodiment of the invention provides。As shown in Figure 4, the method for concentration of the present embodiment includes step S41 to S42。
S41, the first driving drum and the second driving drum rotate respectively, to drive the first feed belt and the second feed belt to carry out transmission；
S42, the first magnetic system and the second magnetic system rotate respectively, strongly magnetic mineral granule in cell body is adsorbed onto respectively on described first feed belt and described second feed belt, realizing the concentration to strongly magnetic mineral granule, described strongly magnetic mineral granule is entered by feed port。
In the present embodiment, the concentration of the strongly magnetic mineral granule of the concentration obtained is 60%-85%。
The method for concentration based on concentration magnetic separator of the present embodiment, it is possible to effectively utilize any of the above-described embodiment disclosed concentration magnetic separator and strongly magnetic mineral granule is concentrated, improve thickening efficiency。
One of ordinary skill in the art will appreciate that: various embodiments above only in order to technical scheme to be described, is not intended to limit；Although the present invention being described in detail with reference to foregoing embodiments, it will be understood by those within the art that: the technical scheme described in foregoing embodiments still can be modified by it, or wherein some or all of technical characteristic is carried out equivalent replacement；And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of the claims in the present invention。
Claims (10)
1. a concentration magnetic separator, it is characterised in that including: cell body, be positioned at the feed port of described cell body bottom surface, the first magnet drum, the second magnet drum, the first driving drum, the second driving drum, the first feed belt and the second feed belt；
Described first magnet drum includes the first magnet drum outer cylinder body and the first magnetic system coaxial with described first magnet drum outer cylinder body, and described second magnet drum includes the second magnet drum outer cylinder body and the second magnetic system coaxial with described second magnet drum outer cylinder body；
Described first driving drum drives described first magnet drum to rotate by described first feed belt, and described second driving drum drives described second magnet drum to rotate by described second feed belt；
The direction of rotation of described first magnetic system and described second magnetic system is contrary, to be brought to by the magnetic iron ore in described cell body on described first feed belt and described second feed belt。
2. concentration magnetic separator according to claim 1, it is characterised in that described first magnet drum and described second magnet drum are positioned at described cell body, described first magnet drum is parallel with the axis of described second magnet drum and belongs to same horizontal plane。
3. concentration magnetic separator according to claim 1, it is characterised in that the downside of described first feed belt and there is gap between downside and the upper edge of described cell body of described second feed belt。
4. concentration magnetic separator according to claim 1, it is characterised in that the disk pack angle of described first magnetic system and described second magnetic system is 360 °。
5. concentration magnetic separator according to claim 1, it is characterised in that the rotating speed of described first magnetic system is more than the rotating speed of described first magnet drum outer cylinder body, and the rotating speed of described second magnetic system is more than the rotating speed of described second magnet drum outer cylinder body。
6. concentration magnetic separator according to claim 1, it is characterised in that described first magnet drum and described second magnet drum are arranged on slide device, to regulate the distance between described first magnet drum and described second magnet drum。
7. concentration magnetic separator according to claim 1, it is characterised in that be provided with two downflow weirs inside described cell body, said two downflow weir is positioned at the both sides of described feed port, and the height of described cell body is more than the height of each downflow weir。
8. concentration magnetic separator according to claim 1, it is characterized in that, described concentration magnetic separator also includes multiple buncher, and the plurality of buncher connects and regulate the rotating speed of described first magnetic system, described second magnetic system, described first driving drum and described second driving drum respectively。
9. concentration magnetic separator according to claim 1, it is characterised in that described cell body is connected with two overfalls, and said two overfall lays respectively at the both sides of said two downflow weir。
10. the method for concentration based on the concentration magnetic separator described in any one of claim 1 to 9, it is characterised in that including:
First driving drum and the second driving drum rotate respectively, to drive the first feed belt and the second feed belt to carry out transmission；
First magnetic system and the second magnetic system rotate respectively, to be adsorbed onto by strongly magnetic mineral granule in cell body on described first feed belt and described second feed belt respectively, it is achieved the concentration to strongly magnetic mineral granule, described strongly magnetic mineral granule is entered by feed port。
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| CN107694745A (en) * | 2017-11-15 | 2018-02-16 | 中冶北方（大连）工程技术有限公司 | A kind of elutriation magnetic separator tailing treatment technology |
| CN113245016A (en) * | 2021-04-10 | 2021-08-13 | 蒋禄亮 | Stainless steel ball surface magnetic powder removing device utilizing magnetism |
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