CN114749271A - Quality-based grading separation and middling selective regrinding method for lead-zinc sulfide ore containing pyrrhotite - Google Patents
Quality-based grading separation and middling selective regrinding method for lead-zinc sulfide ore containing pyrrhotite Download PDFInfo
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- CN114749271A CN114749271A CN202210478349.0A CN202210478349A CN114749271A CN 114749271 A CN114749271 A CN 114749271A CN 202210478349 A CN202210478349 A CN 202210478349A CN 114749271 A CN114749271 A CN 114749271A
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- 238000000926 separation method Methods 0.000 title claims abstract description 43
- JQJCSZOEVBFDKO-UHFFFAOYSA-N lead zinc Chemical compound [Zn].[Pb] JQJCSZOEVBFDKO-UHFFFAOYSA-N 0.000 title claims abstract description 40
- 229910052952 pyrrhotite Inorganic materials 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 23
- 239000005083 Zinc sulfide Substances 0.000 title claims abstract description 16
- 229910052984 zinc sulfide Inorganic materials 0.000 title claims abstract description 9
- 238000007885 magnetic separation Methods 0.000 claims abstract description 47
- 239000012141 concentrate Substances 0.000 claims abstract description 37
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 35
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 24
- 239000011593 sulfur Substances 0.000 claims abstract description 23
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 22
- 239000011707 mineral Substances 0.000 claims abstract description 22
- 229910052742 iron Inorganic materials 0.000 claims abstract description 18
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000011133 lead Substances 0.000 claims description 32
- 239000011701 zinc Substances 0.000 claims description 31
- 229910052725 zinc Inorganic materials 0.000 claims description 31
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 30
- 239000003795 chemical substances by application Substances 0.000 claims description 17
- 229910001656 zinc mineral Inorganic materials 0.000 claims description 15
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 claims description 10
- 229910021532 Calcite Inorganic materials 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 6
- 239000010453 quartz Substances 0.000 claims description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 claims description 5
- ZOOODBUHSVUZEM-UHFFFAOYSA-N ethoxymethanedithioic acid Chemical compound CCOC(S)=S ZOOODBUHSVUZEM-UHFFFAOYSA-N 0.000 claims description 5
- 239000003112 inhibitor Substances 0.000 claims description 5
- 239000002994 raw material Substances 0.000 claims description 5
- 235000010265 sodium sulphite Nutrition 0.000 claims description 5
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 claims description 5
- 229910000368 zinc sulfate Inorganic materials 0.000 claims description 5
- 229960001763 zinc sulfate Drugs 0.000 claims description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 4
- 230000003213 activating effect Effects 0.000 claims description 4
- 229910000365 copper sulfate Inorganic materials 0.000 claims description 4
- 230000002401 inhibitory effect Effects 0.000 claims description 3
- 239000004088 foaming agent Substances 0.000 claims description 2
- 239000002245 particle Substances 0.000 claims description 2
- QTANTQQOYSUMLC-UHFFFAOYSA-O Ethidium cation Chemical compound C12=CC(N)=CC=C2C2=CC=C(N)C=C2[N+](CC)=C1C1=CC=CC=C1 QTANTQQOYSUMLC-UHFFFAOYSA-O 0.000 claims 1
- 238000007865 diluting Methods 0.000 claims 1
- 229910052745 lead Inorganic materials 0.000 claims 1
- 230000005389 magnetism Effects 0.000 abstract description 4
- 239000000178 monomer Substances 0.000 abstract description 3
- 238000010494 dissociation reaction Methods 0.000 abstract description 2
- 230000005593 dissociations Effects 0.000 abstract description 2
- 230000002411 adverse Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 abstract 1
- 238000011084 recovery Methods 0.000 description 11
- 230000005484 gravity Effects 0.000 description 4
- 238000005188 flotation Methods 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 238000003723 Smelting Methods 0.000 description 1
- APYGBEXYIRZQJR-UHFFFAOYSA-N [N].C(C)[S] Chemical compound [N].C(C)[S] APYGBEXYIRZQJR-UHFFFAOYSA-N 0.000 description 1
- 239000012190 activator Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 238000010408 sweeping Methods 0.000 description 1
- 230000031068 symbiosis, encompassing mutualism through parasitism Effects 0.000 description 1
Images
Classifications
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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
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- Manufacture And Refinement Of Metals (AREA)
Abstract
A method for separating, grading and separating lead-zinc sulfide ores containing pyrrhotite and selectively regrinding middlings comprises the following steps: (1) performing magnetic separation and quality separation on a product obtained after ore grinding to obtain magnetic separation rough concentrate; (2) grading and sorting the magnetic separation rough concentrate, wherein a product of 0.074mm is a high-sulfur iron concentrate; (3) and combining the product with the thickness of 0.074mm in the magnetic separation rough concentrate and the magnetic separation tailings as middlings, feeding the middlings into a grinding machine for middling selective regrinding, feeding the qualified ground ore products into lead-zinc separation operation, and feeding the oversize products back to the magnetic separation quality separation operation. Based on the characteristics of strong magnetism and coarse embedded granularity of pyrrhotite, the high-sulfur iron ore concentrate is obtained after separation by quality classification, so that the influence of high sulfur on subsequent operation can be reduced, the adverse effect of magnetic minerals on a grinding machine can be reduced, intergrowth in middlings is further subjected to monomer dissociation through selective regrinding of the middlings, and the subsequent sorting operation is facilitated.
Description
Technical Field
The invention relates to the technical field of mineral processing. In particular to a method for separating, grading and sorting lead-zinc sulphide ores containing pyrrhotite and selectively regrinding middlings.
Background
The pyrrhotite and the lead-zinc sulphide ore are in close symbiosis, while the pyrrhotite has strong magnetism and larger hardness, the lead-zinc ore has brittle physical property, and the embedding particle sizes of the minerals are different. At present, lead-zinc sulphide ore containing pyrrhotite is produced and treated by an ore dressing plant, and the ore is usually ground once, and then the obtained product is floated. The flotation principle flow is to inhibit pyrrhotite, float lead and zinc, and finally perform lead and zinc separation operation, but the presence of pyrrhotite can deteriorate the lead and zinc flotation separation operation. Therefore, some ore dressing plants perform magnetic separation on the ground ore products to remove pyrrhotite in advance, and lead-zinc separation operation is performed on the magnetic separation tailings or the lead-zinc separation operation is performed after the ore grinding.
However, because the pyrrhotite has high hardness, large specific gravity and strong magnetism, even if the pyrrhotite is removed in advance by adopting magnetic separation, the subsequent lead and zinc operation is facilitated to a certain extent, but the impurity content in the pyrrhotite removed in advance is very high, and the subsequent smelting index is difficult to meet. In addition, magnetic minerals with high specific gravity are easy to form vicious circle in the mill, the efficiency of the ore mill is reduced, and lead-zinc minerals are subjected to more over-crushing.
Disclosure of Invention
The invention provides a method for separating, grading and sorting lead-zinc sulphide ores containing pyrrhotite and selectively regrinding middlings aiming at the problems. The method is simple to operate, and can be popularized and applied in polymetallic mines containing pyrrhotite on a large scale.
The technical scheme of the invention is as follows: a method for separating and grading the lead-zinc sulfide ore containing pyrrhotite by different qualities and selectively regrinding middling, wherein the raw material of the ore is the lead-zinc ore containing pyrrhotite, the contents of lead, zinc, iron and sulfur in the ore are respectively 2.36%, 2.42%, 15.55% and 18.72%, the gangue minerals are quartz and calcite,
the specific operation steps are as follows:
(1) introducing a product obtained after ore grinding into a stirring barrel for size mixing, so that the concentration of ore pulp is diluted from 60% to 10% -25%, and the subsequent magnetic separation and quality separation operation is facilitated;
(2) performing magnetic separation and quality separation on the ore pulp in the step (1) to obtain magnetic separation rough concentrate, wherein the magnetic field intensity of the magnetic separation is 1500-2500 Gs;
(2) grading and sorting the magnetic separation rough concentrate by using a hydrocyclone, wherein a product of-0.074 mm is a high-sulfur iron concentrate;
(3) And combining and concentrating the product with the thickness of 0.074mm in the magnetic separation rough concentrate and the magnetic separation tailings, and then feeding the concentrated product as middling into a grinding machine for middling selective regrinding, wherein the grinding fineness is 80-85% at minus 0.074mm, the grinding concentration is 50-65%, the qualified ground product is subjected to lead-zinc separation, and the product on a sieve is returned to the magnetic separation quality-separation operation.
The classification and separation equipment in the step (2) is FXJ-350 hydrocyclone.
And (3) the lead-zinc separation operation adopts a zinc-inhibiting lead floating process, the lead circulation adopts 'one-coarse three-fine three-sweep' operation, the zinc circulation adopts 'one-coarse three-fine two-sweep' operation, the lead-zinc separation all adopts No. two oil as a foaming agent, the ethidium-sulfur-nitrogen is a lead mineral collecting agent, the ethyl xanthate is a zinc mineral collecting agent, and the zinc sulfate and the sodium sulfite are mixed according to the mass ratio of 1: 1 as a combined inhibitor of zinc minerals and copper sulphate as a zinc mineral activator in the zinc cycle.
The invention has the following advantages:
(1) the pyrrhotite is separated out by the quality separator, and high-sulfur iron ore concentrate is obtained after separation, so that the influence of high sulfur on separation can be reduced. The magnetic minerals with higher hardness and higher specific gravity are separated from the ore and are separately treated. The vicious circle of magnetic minerals with large specific gravity which are easy to form in the grinding machine is reduced, and the efficiency of the grinding machine is improved;
(2) The selective regrinding of the middlings promotes the association in the middlings to further dissociate the monomers, thereby being beneficial to improving the ore dressing recovery rate;
(3) the method is simple to operate and easy to popularize and apply in mines on a large scale.
Drawings
Fig. 1 is a schematic diagram of the method for separating, classifying and separating the lead-zinc sulfide ore containing pyrrhotite and selectively regrinding middlings.
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
The technical solution of the present invention is further described in detail with reference to the following examples, but the scope of the present invention is not limited to the contents.
Example 1
This example is an example of the method for separating, classifying and separating the lead-zinc sulphide ore containing pyrrhotite and selectively regrinding middlings according to the invention,
the mineral raw material is a lead-zinc ore containing pyrrhotite in Guangxi, the contents of lead, zinc, iron and sulfur in the ore are respectively 2.36%, 2.42%, 15.55% and 18.72%, and the gangue minerals comprise quartz, calcite and the like.
The specific operation steps are as follows:
(1) introducing a product obtained after ore grinding into a stirring barrel for size mixing to dilute the concentration of ore pulp to 10%;
(2) performing magnetic separation and quality separation on the ore pulp in the step (1) to obtain magnetic separation rough concentrate, wherein the magnetic field intensity of the magnetic separation is 2500 Gs;
(3) classifying and sorting the magnetic separation rough concentrate by adopting an FXJ-350 hydrocyclone, wherein a product of 0.074mm is a high-sulfur iron concentrate;
(4) Combining and concentrating products with the thickness of 0.074mm in the magnetic separation rough concentrate and the magnetic separation tailings, and then taking the products as middlings to enter a grinding machine for middling selective regrinding, wherein the grinding fineness is 82% when the thickness of minus 0.074mm is minus, the grinding concentration is 60%, qualified grinding products enter lead-zinc separation operation, the lead-zinc separation operation adopts a zinc suppression lead flotation process, and products on a screen return to the magnetic separation quality separation operation. Lead circulation is 'one-coarse three-fine three-sweeping' operation, ethyl sulfur nitrogen is a collecting agent of lead minerals, and zinc sulfate and sodium sulfite are mixed according to a mass ratio of 1: 1 is used as a zinc mineral combined inhibitor, zinc circulation is 'one-coarse three-fine two-sweep', ethyl xanthate is a zinc mineral collecting agent, and copper sulfate is an activating agent of the zinc mineral collecting agent.
By adopting the process, the high-sulfur iron concentrate with the sulfur content of 30.75 percent and the recovery rate of 40.71 percent, the lead concentrate with the lead content of 47.59 percent and the lead recovery rate of 74.69 percent, and the zinc concentrate with the zinc content of 42.39 percent and the zinc recovery rate of 76.35 percent can be finally obtained.
Example 2
This example is another example of the method for separating, classifying and separating the lead-zinc sulfide ore containing pyrrhotite and selectively regrinding middlings according to the invention,
the mineral raw material is lead-zinc ore containing pyrrhotite in Yunnan, the contents of lead, zinc, iron and sulfur in the ore are respectively 3.36%, 5.42%, 16.83% and 21.72%, and gangue minerals comprise quartz, calcite and the like.
The specific operation steps are as follows:
(1) introducing a product obtained after ore grinding into a stirring barrel for size mixing, and introducing the product into the stirring barrel for size mixing to dilute the ore pulp to 15%;
(2) performing magnetic separation and quality separation on the ore pulp in the step (1) to obtain magnetic separation rough concentrate, wherein the magnetic field intensity of the magnetic separation is 2000 Gs;
(3) classifying and sorting the magnetic separation rough concentrate by adopting an FXJ-350 hydrocyclone, wherein a product of 0.074mm is a high-sulfur iron concentrate;
(4) and (3) concentrating products with the thickness of 0.074mm in the magnetic separation rough concentrate and magnetic separation tailings, and enabling the concentrated products and the magnetic separation tailings to be used as middlings to enter a grinding mill for middling selective regrinding, wherein the grinding fineness of-0.074 mm is 80%, the grinding concentration is 50%, qualified ground products enter lead-zinc separation operation, the lead-zinc separation operation adopts a zinc-suppression lead-floating process, and products on a sieve return to the magnetic separation quality-classifying operation. The lead circulation is 'one-coarse three-fine three-sweep' operation, the ethide-sulfur-nitrogen is a collecting agent of lead minerals, and the zinc sulfate and the sodium sulfite are mixed according to the mass ratio of 1: 1 is used as a zinc mineral combination inhibitor, zinc circulation is 'one-coarse three-fine two-sweep', ethyl xanthate is a zinc mineral collecting agent, and copper sulfate is an activating agent of the zinc mineral collecting agent.
By adopting the flow, high-sulfur iron concentrate with the sulfur content of 38.45% and the recovery rate of 42.36%, lead concentrate with the lead content of 57.59% and the lead recovery rate of 78.44% and zinc concentrate with the zinc content of 43.09% and the zinc recovery rate of 84.13% can be finally obtained.
Example 3
This example is another example of the process for the separate classification and classification of the pyrrhotite-containing lead-zinc sulphide ore and the selective regrinding of middlings according to the invention,
the mineral raw material is a lead-zinc ore containing pyrrhotite in Hunan, the contents of lead, zinc, iron and sulfur in the ore are respectively 1.45%, 1.87%, 17.56% and 16.45%, and the gangue minerals comprise quartz, calcite and the like.
The specific operation steps are as follows:
(1) introducing a product obtained after ore grinding into a stirring barrel for size mixing to dilute the concentration of ore pulp to 25%;
(2) carrying out magnetic separation and quality separation on the ore pulp in the step (1) to obtain magnetic separation rough concentrate, wherein the magnetic field intensity of the magnetic separation is 1500 Gs;
(3) classifying and sorting the magnetic separation rough concentrate by adopting an FXJ-350 hydrocyclone, wherein a product of 0.074mm is a high-sulfur iron concentrate;
(4) combining products with the thickness of 0.074mm in the magnetic separation rough concentrate and the magnetic separation tailings as middlings, feeding the middlings into a grinding machine for middling selective regrinding, wherein the grinding fineness of-0.074 mm is 85%, the grinding concentration is 65%, feeding qualified ground products into lead-zinc separation operation, wherein the lead-zinc separation operation adopts a zinc-inhibiting lead-floating process, and feeding products on a screen back to the magnetic separation quality-classifying operation. The lead circulation is 'one-coarse three-fine three-sweep' operation, the ethide-sulfur-nitrogen is a collecting agent of lead minerals, and the zinc sulfate and the sodium sulfite are mixed according to the mass ratio of 1: 1 is used as a zinc mineral combination inhibitor, zinc circulation is 'one-coarse three-fine two-sweep', ethyl xanthate is a zinc mineral collecting agent, and copper sulfate is an activating agent of the zinc mineral collecting agent.
By adopting the process, high-sulfur iron concentrate with the sulfur content of 32.25% and the recovery rate of 37.49%, lead concentrate with the lead content of 43.78% and the lead recovery rate of 83.33%, and zinc concentrate with the zinc content of 38.26% and the zinc recovery rate of 71.34% can be finally obtained.
The method utilizes the characteristic of strong magnetism of pyrrhotite, and performs grading separation on the magnetic concentrate through magnetic separation and quality separation to obtain high-sulfur iron concentrate, thereby improving the efficiency of a grinding machine and reducing the influence of high sulfur on the subsequent lead-zinc separation; the selective regrinding of middlings promotes the monomer dissociation degree of minerals and effectively improves the metal recovery rate.
Claims (4)
1. A method for separating, classifying and selectively regrinding the lead-zinc sulfide ore containing pyrrhotite features that the ore is a lead-zinc ore containing pyrrhotite, the contents of Pb, Zn, Fe and S in said ore are respectively 2.36%, 2.42%, 15.55% and 18.72%, the gangue minerals are quartz and calcite,
the specific operation steps are as follows:
(1) introducing a product obtained after ore grinding into a stirring barrel for size mixing, and diluting the ore pulp concentration from 60% to 10% -25%;
(2) performing magnetic separation and quality separation on the ore pulp in the step (1) to obtain magnetic separation rough concentrate, wherein the magnetic field intensity of the magnetic separation is 1500-2500 Gs;
(3) Grading and sorting the magnetic separation rough concentrate by adopting a hydrocyclone, wherein a product with the thickness of-0.074 mm is a high-sulfur iron concentrate;
(4) and combining and concentrating the product with the thickness of 0.074mm in the magnetic separation rough concentrate and the magnetic separation tailings, and then feeding the concentrated product as middling into a grinding machine for middling selective regrinding, wherein the grinding fineness is 80-85% at minus 0.074mm, the grinding concentration is 50-65%, the qualified ground product is subjected to lead-zinc separation, and the product on a sieve is returned to the magnetic separation quality-separation operation.
2. The pyrrhotite-containing lead-zinc sulphide ore separating, classifying and separating and middling selective regrinding method according to claim 1, wherein the classifying and separating device in the step (3) is FXJ-350 hydrocyclone with the throughput capacity of 85m3H, the separation particle size range is 0.05-0.15 mm.
3. The method for the separate classification and the selective regrinding of the lead-zinc sulfide ore containing pyrrhotite according to the claim 1, characterized in that the lead-zinc separation operation in the step (4) adopts a zinc-inhibiting lead-floating flow, the lead cycle adopts a 'one-coarse three-fine three-sweep' separation operation, the ethidium and the azote are collecting agents of lead minerals, and the zinc sulfate and the sodium sulfite are mixed according to the mass ratio of 1: 1 as a combined inhibitor of zinc minerals; the zinc separation operation is carried out on the lead separation tailings, the zinc separation operation of 'one-coarse three-fine two-sweep' is adopted in the zinc separation cycle, and copper sulfate and ethyl xanthate are respectively used as a zinc mineral activating agent and a collecting agent. The foaming agent for lead-zinc separation operation is No. two oil.
4. The method for the separate classification and the selective regrinding of the lead-zinc sulfide ore containing pyrrhotite according to the claim 1, characterized in that the mineral raw material is a lead-zinc ore containing pyrrhotite, the contents of lead, zinc, iron and sulfur in the ore are respectively 1.45%, 1.87%, 17.56% and 16.45%, and the gangue minerals are quartz and calcite.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117816363A (en) * | 2024-03-05 | 2024-04-05 | 中国矿业大学(北京) | Separation and purification method of zinc concentrate |
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| CN104437818A (en) * | 2014-11-24 | 2015-03-25 | 西北矿冶研究院 | Beneficiation method for copper-lead-zinc polymetallic ore |
| CN105689147A (en) * | 2016-03-07 | 2016-06-22 | 紫金矿业集团股份有限公司 | Pollution-free flotation separation method for copper-lead-zinc polymetallic ore |
| CN106222397A (en) * | 2016-08-04 | 2016-12-14 | 中南大学 | A kind of utilize pyrite sulfidation roasting smithsonite and the method for Zn accumulation galvanized iron |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103301931A (en) * | 2013-06-14 | 2013-09-18 | 紫金矿业集团股份有限公司 | Beneficiation method for veinlet disseminated ore body type copper-lead-zinc-sulfur complex polymetallic ore |
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| CN117816363A (en) * | 2024-03-05 | 2024-04-05 | 中国矿业大学(北京) | Separation and purification method of zinc concentrate |
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Application publication date: 20220715 |