CN110813517A - Beneficiation method for recycling wolframite from tailings - Google Patents
Beneficiation method for recycling wolframite from tailings Download PDFInfo
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- CN110813517A CN110813517A CN201911092932.2A CN201911092932A CN110813517A CN 110813517 A CN110813517 A CN 110813517A CN 201911092932 A CN201911092932 A CN 201911092932A CN 110813517 A CN110813517 A CN 110813517A
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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
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B7/00—Combinations of wet processes or apparatus with other processes or apparatus, e.g. for dressing ores or garbage
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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
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B9/00—General arrangement of separating plant, e.g. flow sheets
- B03B9/06—General arrangement of separating plant, e.g. flow sheets specially adapted for refuse
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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
- B03C1/30—Combinations with other devices, not otherwise provided for
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
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Abstract
The invention relates to a beneficiation method for recovering wolframite from tailings, and belongs to the technical field of beneficiation recovery. Grinding wolframite tailings until the content of-0.075 mm is 70-90%; (2) carrying out magnetic separation on the obtained substance in the step (1) under the magnetic field intensity of 0.1-0.2T to obtain weak magnetic concentrate and weak magnetic tailings; (3) carrying out magnetic separation on the weak magnetic tailings obtained in the step (2) under the magnetic field intensity of 0.8-1.4T to obtain strong magnetic concentrate and non-magnetic tailings; (4) grading the strong magnetic concentrate obtained in the step (3) into two grades of + 0.051-0.075 mm and-0.051-0.075 mm, and taking the coarse fraction; (5) and (4) reselecting the obtained matter in the step (4), during reselection, roughing is firstly carried out to obtain roughing concentrate, roughing middlings and roughing tailings, during scavenging, the selected raw material is the roughing middlings to obtain scavenging concentrate and scavenging tailings, and the roughing concentrate and the scavenging concentrate are combined to obtain reselected wolframite concentrate. The invention avoids the flotation process adopted in the conventional wolframine beneficiation recovery, does not need to add any chemical agent, and does not produce secondary pollution to the environment.
Description
Technical Field
The invention relates to the technical field of beneficiation recovery, in particular to a beneficiation method for recovering wolframite from tailings.
Background
With the continuous development of economy in China, a large amount of mineral resources are developed and utilized, and the resources are gradually exhausted. The recycling of useful components in the tailings serving as secondary resources can effectively relieve resource shortage, improve the utilization efficiency of resources, reduce the stacking area of the tailings, reduce the pollution of heavy metal ions in the tailings to the environment and avoid landslide, collapse and other disasters to the maximum extent. The black tungsten is a nonmetal aluminosilicate mineral which is widely applied and is widely applied in the industries of materials, chemistry, coatings, cosmetics and the like. Most metamorphic rock metal mine tailings contain a large amount of wolframite resources, and most metamorphic rock metal mine tailings are piled in a tailing pond and are not recycled.
Chinese patent documents with publication number CN110302905A and publication date 2019, 10 and 08 disclose a wolframite beneficiation method, which mainly comprises the following steps: s1, grinding: grinding the wolframite through an ore grinding machine, then screening, grinding the unqualified wolframite again to prepare wolframite fine particles; s2, removing iron, namely feeding iron into a magnetic separator for magnetic separation of magnetite to remove iron elements in the iron, wherein iron cannot be effectively separated from wolframite in the flotation process and the concentrate grade of the wolframite is influenced, and tailings enter a concentration tank for concentration; s3, flotation sulfide ore: adding the ore raw pulp into a stirring barrel, then adding a medicament, stirring for 3 minutes, and floating out sulfide ore; s4, flotation of black tungsten: and (4) the sulfide ore tailings enter a tungsten flotation section for roughing and fine selection, and finally black tungsten concentrate is selected.
Currently, the black tungsten recovery is mainly a flotation process, and a small amount of combined processes such as gravity separation-flotation, magnetic separation-flotation and the like mainly based on flotation are adopted, and the flotation processes mainly comprise two types: one method is to float black tungsten by using a cation collector under the condition of acid ore pulp (pH 2-4), and the method has higher requirement on strong acid corrosion resistance of equipment because the ore pulp has lower pH and is easy to corrode pipelines and equipment; the other method is to float the black tungsten by using an anion collecting agent under the condition of neutral or alkalescent ore pulp, and the method has low requirements on equipment, but the product quality and the recovery rate of the black tungsten concentrate are not as good as those of an acid ore pulp flotation method. Meanwhile, a large amount of chemical agents are used in the two flotation processes, the production cost is high, the flotation environment is severe, the environmental pollution is serious, the safety and the environmental protection can hardly reach the relevant national standards, and the requirements of the national policy on environmental protection, energy conservation and emission reduction are not met.
Disclosure of Invention
The invention provides a beneficiation method for recovering wolframite from tailings, which aims to solve the problems that pipelines and equipment are easy to corrode, the environmental pollution is serious, and the safety and environmental protection are difficult to reach the relevant national standard.
The technical scheme adopted by the invention is as follows: comprises the following steps:
(1) grinding the wolframite tailings until the content of-0.075 mm is 70-90%;
(2) carrying out magnetic separation on the obtained substance in the step (1) under the magnetic field intensity of 0.1-0.2T to obtain weak magnetic concentrate and weak magnetic tailings;
(3) carrying out magnetic separation on the weak magnetic tailings obtained in the step (2) under the magnetic field intensity of 0.8-1.4T to obtain strong magnetic concentrate and non-magnetic tailings;
(4) grading the strong magnetic concentrate obtained in the step (3) into two grades of + 0.051-0.075 mm and-0.051-0.075 mm, and taking the coarse fraction;
(5) and (4) reselecting the obtained matter in the step (4), during reselection, roughing is firstly carried out to obtain roughing concentrate, roughing middlings and roughing tailings, during scavenging, the selected raw material is the roughing middlings to obtain scavenging concentrate and scavenging tailings, and the roughing concentrate and the scavenging concentrate are combined to obtain reselected wolframite concentrate.
It will be understood by those skilled in the art that the beneficiation process of the present invention consists of only different physical beneficiation processes. The invention avoids the problems of pollution and higher cost caused by chemical agents due to only adopting a physical ore dressing process, thereby having the advantages of less equipment investment, simple flow structure and low ore dressing cost.
Generally, when the wolframite of the mineral processing tailings is recovered, the content of the wolframite should not be too low. The method adopts segmented magnetic separation and combines the processes of classification and gravity separation, and can perform ore dressing on the wolframite in the wolframite tailings to obtain the wolframite concentrate with the content of more than 77 percent.
In the magnetic separation process of the step (2), the obtained weak magnetic concentrate mainly contains iron slag, and the black tungsten is enriched in the weak magnetic tailings. By this step, the black tungsten can be easily selected in the subsequent step.
After the step (3), the obtained strong magnetic concentrate is classified, the classified coarse fraction is used as a subsequent reselection raw material, and then the black tungsten concentrate with excellent grade can be efficiently obtained through reselection.
The black tungsten is enriched step by utilizing ore grinding, low-intensity magnetic separation, high-intensity magnetic separation, classification and gravity separation in sequence, and finally black tungsten concentrate with excellent grade is formed. Although magnetic separation and gravity separation are also commonly used for separating the wolframium in the prior art, the combination of the magnetic separation and gravity separation with a flotation process added with a chemical agent cannot be avoided, so that the problems of high production cost and high environmental treatment cost cannot be solved. Meanwhile, the magnetic separation process in the prior art is used for separating weak magnetic wolframite from strong magnetic iron minerals, while the magnetic separation process in the invention is used for separating weak magnetic wolframite from non-magnetic gangue minerals, and although the same process is used, the principle is different. The invention realizes the technical effect of obtaining the wolframite concentrate with excellent grade only by a physical ore dressing method by continuously searching the specific process of the magnetic separation and providing the classification treatment specified by the invention before the gravity separation. It can be understood that because the invention does not need to add any chemical agent, the water and the washing water after the concentrate and the tailings are filtered can be used as the return water to be returned for recycling, and the secondary pollution to the environment can not be generated.
On the basis of the principle of the invention, as an alternative scheme of the invention, in the step (1), at least one of an autogenous mill, a semi-autogenous mill, a rod mill and a ball mill can be adopted for ore grinding.
Generally, magnetic separation work is convenient to carry out, and in step (2) and/or step (3), when carrying out the magnetic separation, the ore pulp mass percentage concentration is 25-50%.
In the step (2), a wet type low-intensity magnetic separator is adopted during magnetic separation, and the wet type low-intensity magnetic separator comprises one or a combination of a permanent magnet type low-intensity magnetic separator and a wet type electromagnetic type low-intensity magnetic separator.
In the step (3), a wet type strong magnetic separator is adopted during magnetic separation, and the wet type strong magnetic separator comprises one or a combination of a plurality of devices of a flat ring type strong magnetic separator, a vertical ring type strong magnetic separator, a flat ring type high gradient strong magnetic separator and a vertical ring type high gradient strong magnetic separator.
In the step (4), when the classification is carried out, one or a plurality of devices including a hydrocyclone and a high-frequency vibrating screen are combined.
In the step (5), during the gravity separation, one or more devices including a shaking table and a cyclone of an industrial machine type are adopted.
The invention has the beneficial effects that: according to the method, a chemical agent is not needed, and the black tungsten concentrate with excellent quality is obtained only by adopting a physical ore dressing method, so that the operation cost is reduced, and the environmental pollution is avoided; the content of the black tungsten concentrate obtained by the method can reach more than 77%, and the recovery rate of the black tungsten can reach more than 40%.
Drawings
FIG. 1 is a schematic process flow diagram of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Example 1
The method comprises the following steps:
(1) grinding the wolframite tailings until the content of-0.075 mm is 70%;
(2) carrying out magnetic separation on the product obtained in the step (1) under the magnetic field intensity of 0.1T to obtain weak magnetic concentrate and weak magnetic tailings;
(3) carrying out magnetic separation on the weak magnetic tailings obtained in the step (2) under the magnetic field intensity of 0.8T to obtain strong magnetic concentrate and nonmagnetic tailings;
(4) grading the strong magnetic concentrate obtained in the step (3) into two grades of +0.0515mm and-0.051 mm, and taking the coarse fraction;
(5) reselecting the obtained matter in the step (4), during reselection, firstly roughing to obtain roughing concentrate, roughing middlings and roughing tailings, during scavenging, selecting the roughing middlings as the raw materials to obtain scavenging concentrate and scavenging tailings, and combining the roughing concentrate and the scavenging concentrate to obtain reselected wolframite concentrate;
in the step (1), autogenous grinding is adopted during ore grinding;
when the magnetic separation is carried out, the mass percentage concentration of the ore pulp is 25%;
in the step (2), a wet type low-intensity magnetic separator is adopted during the magnetic separation, and the wet type low-intensity magnetic separator comprises one of a permanent magnet type low-intensity magnetic separator and a wet type electromagnetic type low-intensity magnetic separator;
in the step (3), a wet type strong magnetic separator is adopted during the magnetic separation, and the wet type strong magnetic separator comprises one of a flat ring type strong magnetic separator, a vertical ring type strong magnetic separator, a flat ring type high gradient strong magnetic separator and a vertical ring type high gradient strong magnetic separator;
in the step (4), one of a hydrocyclone and a high-frequency vibrating screen is adopted during the classification;
in the step (5), one of a shaker and a cyclone, which are industrial models, is used for the gravity separation.
Example 2
The method comprises the following steps:
(1) grinding wolframite tailings until the content of-0.075 mm is 80%;
(2) carrying out magnetic separation on the product obtained in the step (1) under the magnetic field intensity of 0.15T to obtain weak magnetic concentrate and weak magnetic tailings;
(3) carrying out magnetic separation on the weak magnetic tailings obtained in the step (2) under the magnetic field intensity of 1.1T to obtain strong magnetic concentrate and nonmagnetic tailings;
(4) grading the strong magnetic concentrate obtained in the step (3) into two grades of + 0.051-0.075 mm and-0.051-0.075 mm, and taking the coarse fraction;
(5) reselecting the obtained matter in the step (4), during reselection, firstly roughing to obtain roughing concentrate, roughing middlings and roughing tailings, during scavenging, selecting the roughing middlings as the raw materials to obtain scavenging concentrate and scavenging tailings, and combining the roughing concentrate and the scavenging concentrate to obtain reselected wolframite concentrate;
in the step (1), a rod mill is adopted during ore grinding;
when the magnetic separation is carried out, the mass percentage concentration of the ore pulp is 35 percent;
in the step (2), a wet type low-intensity magnetic separator is adopted during the magnetic separation, and the wet type low-intensity magnetic separator comprises one of a permanent magnet type low-intensity magnetic separator and a wet type electromagnetic type low-intensity magnetic separator;
in the step (3), a wet type strong magnetic separator is adopted during the magnetic separation, and the wet type strong magnetic separator comprises one of a flat ring type strong magnetic separator, a vertical ring type strong magnetic separator, a flat ring type high gradient strong magnetic separator and a vertical ring type high gradient strong magnetic separator;
in the step (4), one of a hydrocyclone and a high-frequency vibrating screen is adopted during the classification;
in the step (5), one of a shaker and a cyclone, which are industrial models, is used for the gravity separation.
Example 3
The method comprises the following steps:
(1) grinding the wolframite tailings until the content of-0.075 mm is 90%;
(2) carrying out magnetic separation on the product obtained in the step (1) under the magnetic field intensity of 0.2T to obtain weak magnetic concentrate and weak magnetic tailings;
(3) carrying out magnetic separation on the weak magnetic tailings obtained in the step (2) under the magnetic field intensity of 1.4T to obtain strong magnetic concentrate and nonmagnetic tailings;
(4) grading the strong magnetic concentrate obtained in the step (3) into two grades of +0.075mm and-0.075 mm, and taking the coarse fraction;
(5) reselecting the obtained matter in the step (4), during reselection, firstly roughing to obtain roughing concentrate, roughing middlings and roughing tailings, during scavenging, selecting the roughing middlings as the raw materials to obtain scavenging concentrate and scavenging tailings, and combining the roughing concentrate and the scavenging concentrate to obtain reselected wolframite concentrate;
in the step (1), ore grinding is carried out by adopting at least one of an autogenous mill, a semi-autogenous mill, a rod mill and a ball mill;
when the magnetic separation is carried out, the mass percentage concentration of the ore pulp is 50 percent;
in the step (2), a wet type low-intensity magnetic separator is adopted during the magnetic separation, and the wet type low-intensity magnetic separator comprises a permanent magnet type low-intensity magnetic separator and a plurality of equipment combinations in the wet type electromagnetic type low-intensity magnetic separator;
in the step (3), a wet type strong magnetic separator is adopted during the magnetic separation, and the wet type strong magnetic separator comprises a plurality of equipment combinations of a flat ring type strong magnetic separator, a vertical ring type strong magnetic separator, a flat ring type high gradient strong magnetic separator and a vertical ring type high gradient strong magnetic separator;
in the step (4), during the classification, a plurality of equipment combinations including a hydrocyclone and a high-frequency vibrating screen are adopted;
in the step (5), the gravity separation is performed by using one or more devices selected from a shaker and a cyclone of an industrial machine type.
The present invention is further illustrated by the following specific experimental examples.
Experimental example 1
The method takes the black tungsten tailings with the grade of 3.21 percent and the black tungsten content of 13.25 percent in a certain large black tungsten mine tailing pond K20 in China as raw materials, and utilizes the process technology of the invention to carry out the following steps, as shown in figure 1:
(1) grinding: adding the wolframite tailings into a ball mill for closed circuit grinding operation, and grinding the raw ore to a content of 79.4 percent with a thickness of-0.075 mm;
(2) performing low-intensity magnetic separation: carrying out low-intensity magnetic separation on the ground ore sample by a wet permanent magnet low-intensity magnetic separator, wherein the magnetic field intensity is 0.14T, and the mass concentration of ore pulp is 45%; carrying out low-intensity magnetic separation to obtain low-intensity magnetic concentrate (iron slag) and low-intensity magnetic tailings, and taking the low-intensity magnetic tailings as a raw material for further carrying out high-intensity magnetic separation on black tungsten;
(3) strong magnetic separation: the tailings subjected to low-intensity magnetic separation are used as raw materials, and the high-intensity magnetic separation is carried out through a vertical ring type high-gradient high-intensity magnetic separator, wherein the magnetic field intensity is 1.0T, and the mass concentration of ore pulp is 40%. Performing strong magnetic separation to obtain weak magnetic strong magnetic concentrate and nonmagnetic strong magnetic tailings, wherein the strong magnetic tailings are final tailings, and the strong magnetic concentrate containing a large amount of tungsten black minerals is used as a raw material for the next classification process;
(4) grading: grading the strong magnetic separation concentrate by adopting a hydrocyclone, and dividing the grade into two grades of +0.051mm and-0.051 mm, wherein a fine-fraction product is final tailings, and a coarse-fraction product enters the next step of gravity separation operation;
(5) and (3) reselection: adding the classified coarse fraction product into a slime shaking table for gravity concentration and roughing to produce three products of roughing concentrate, roughing middling and roughing tailings, wherein the heavy product is the roughing concentrate, the secondary heavy product is the roughing middling, and the light product is the roughing tailings; meanwhile, adding the rougher middlings into a slime shaking table for scavenging to produce scavenged concentrate and scavenged tailings; the roughing concentrate and the scavenging concentrate are combined to form reselected wolframite concentrate, the roughing tailings and the scavenging tailings are combined to form final tailings, and finally high-quality wolframite concentrate with the K2O content of 8.67%, the wolframite content of 79.45% and the wolframite recovery rate of 41.8% is obtained.
Experimental example 2
The method takes selected wolframite tailings with 2.54 percent of K20 grade and 12.87 percent of wolframite content in a certain domestic wolframite mine tailing pond as raw materials, and utilizes the process technology of the invention to carry out the following steps, as shown in figure 1:
(1) grinding: adding the wolframite tailings into a rod mill for closed circuit grinding operation, and grinding raw ore to the content of 84.7 percent with the content of-0.075 mm;
(2) performing low-intensity magnetic separation: carrying out low-intensity magnetic separation on the ground ore sample by a wet electromagnetic low-intensity magnetic separator, wherein the magnetic field intensity is 0.10T, the mass concentration of the ore pulp is 40%, carrying out low-intensity magnetic separation to obtain low-intensity magnetic concentrate (iron slag) and low-intensity magnetic tailings, and taking the low-intensity magnetic tailings as a raw material for further carrying out high-intensity magnetic separation on black tungsten;
(3) strong magnetic separation: the tailings subjected to low-intensity magnetic separation are used as raw materials, and are subjected to high-intensity magnetic separation through a flat ring type high-gradient high-intensity magnetic separator, wherein the magnetic field intensity is 1.2T, and the mass concentration of ore pulp is 35%. Performing strong magnetic separation to obtain weak magnetic strong magnetic concentrate and nonmagnetic strong magnetic tailings, wherein the strong magnetic tailings are final tailings, and the strong magnetic concentrate containing a large amount of tungsten black minerals is used as a raw material for the next classification process;
(4) grading: grading the high-intensity magnetic separation concentrate by adopting a high-frequency vibrating screen, and dividing the grade into two grades of +0.075mm and-0.075 mm, wherein a fine-fraction product is final tailings, and a coarse-fraction product enters the next step of gravity separation operation;
(5) and (3) reselection: adding the classified coarse fraction product into a slime shaking table for gravity concentration and roughing to produce three products of roughed concentrate, roughed middlings and roughed tailings; meanwhile, adding the rougher middlings into a slime shaking table for scavenging to produce scavenged concentrate and scavenged tailings, wherein the rougher concentrate and the scavenged concentrate are combined into reselected wolframite concentrate, and the rougher tailings and the scavenged tailings are combined into final tailings;
finally obtaining the high-quality wolframite concentrate with the K2O content of 8.23 percent, the wolframite content of 77.32 percent and the wolframite recovery rate of 47.35 percent.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. A beneficiation method for recovering wolframite from tailings is characterized by comprising the following steps:
(1) grinding the wolframite tailings until the content of-0.075 mm is 70-90%;
(2) carrying out magnetic separation on the obtained substance in the step (1) under the magnetic field intensity of 0.1-0.2T to obtain weak magnetic concentrate and weak magnetic tailings;
(3) carrying out magnetic separation on the weak magnetic tailings obtained in the step (2) under the magnetic field intensity of 0.8-1.4T to obtain strong magnetic concentrate and non-magnetic tailings;
(4) grading the strong magnetic concentrate obtained in the step (3) into two grades of + 0.051-0.075 mm and-0.051-0.075 mm, and taking the coarse fraction;
(5) and (4) reselecting the obtained matter in the step (4), during reselection, roughing is firstly carried out to obtain roughing concentrate, roughing middlings and roughing tailings, during scavenging, the selected raw material is the roughing middlings to obtain scavenging concentrate and scavenging tailings, and the roughing concentrate and the scavenging concentrate are combined to obtain reselected wolframite concentrate.
2. A beneficiation method for recovering wolframite from tailings according to claim 1, wherein in the step (1), ore grinding is performed by at least one of an autogenous mill, a semi-autogenous mill, a rod mill and a ball mill.
3. The beneficiation method for recovering wolframite from tailings according to claim 1, characterized in that, during the magnetic separation, the mass percentage concentration of ore pulp is 25-50%.
4. The beneficiation method for recovering wolframite from tailings according to claim 1, wherein in the step (2), a wet type weak magnetic separator is adopted for the magnetic separation, and the wet type weak magnetic separator comprises one or more of a permanent magnet type weak magnetic separator and a wet type electromagnetic type weak magnetic separator.
5. The beneficiation method for recovering wolframite from tailings according to claim 1, wherein in the step (3), a wet type strong magnetic separator is adopted for the magnetic separation, and the wet type strong magnetic separator comprises one or more of a flat ring type strong magnetic separator, a vertical ring type strong magnetic separator, a flat ring type high gradient strong magnetic separator and a vertical ring type high gradient strong magnetic separator.
6. A beneficiation method for recovering wolframite from tailings according to claim 1, wherein in the step (4), the classification is performed by using one or more of a combination of equipment including a hydrocyclone and a high frequency vibration screen.
7. A beneficiation method according to claim 1, wherein the step (5) of re-concentrating is performed by using one or more devices including an industrial type shaker and a cyclone.
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| CN111229449A (en) * | 2020-02-26 | 2020-06-05 | 赣州有色冶金研究所 | Tungsten ore sorting method |
| CN111346741A (en) * | 2020-03-16 | 2020-06-30 | 江西理工大学 | Method for recycling fine-grained wolframite by applying superconducting magnetic separation |
| CN111715399A (en) * | 2020-06-28 | 2020-09-29 | 广东省资源综合利用研究所 | Pretreatment method of high-calcium high-magnesium fine-particle embedded scheelite |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111229449A (en) * | 2020-02-26 | 2020-06-05 | 赣州有色冶金研究所 | Tungsten ore sorting method |
| CN111229449B (en) * | 2020-02-26 | 2021-11-09 | 赣州有色冶金研究所有限公司 | Tungsten ore sorting method |
| CN111346741A (en) * | 2020-03-16 | 2020-06-30 | 江西理工大学 | Method for recycling fine-grained wolframite by applying superconducting magnetic separation |
| CN111715399A (en) * | 2020-06-28 | 2020-09-29 | 广东省资源综合利用研究所 | Pretreatment method of high-calcium high-magnesium fine-particle embedded scheelite |
| CN111715399B (en) * | 2020-06-28 | 2021-12-24 | 广东省科学院资源利用与稀土开发研究所 | Pretreatment method of high-calcium high-magnesium fine-particle embedded scheelite |
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