CN115505735A - Method for separating silver and zinc from high-zinc silver concentrate - Google Patents
Method for separating silver and zinc from high-zinc silver concentrate Download PDFInfo
- Publication number
- CN115505735A CN115505735A CN202211332329.9A CN202211332329A CN115505735A CN 115505735 A CN115505735 A CN 115505735A CN 202211332329 A CN202211332329 A CN 202211332329A CN 115505735 A CN115505735 A CN 115505735A
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- Prior art keywords
- zinc
- silver
- leaching
- concentrate
- separating
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000011701 zinc Substances 0.000 title claims abstract description 74
- 229910052725 zinc Inorganic materials 0.000 title claims abstract description 68
- 229910052709 silver Inorganic materials 0.000 title claims abstract description 62
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 title claims abstract description 60
- 239000004332 silver Substances 0.000 title claims abstract description 60
- 239000012141 concentrate Substances 0.000 title claims abstract description 43
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000002386 leaching Methods 0.000 claims abstract description 61
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 25
- 238000000227 grinding Methods 0.000 claims abstract description 12
- 238000001035 drying Methods 0.000 claims abstract description 9
- 239000002270 dispersing agent Substances 0.000 claims abstract description 8
- 229920005610 lignin Polymers 0.000 claims abstract description 8
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 6
- 239000001301 oxygen Substances 0.000 claims abstract description 6
- 238000003756 stirring Methods 0.000 claims abstract description 6
- BSWGGJHLVUUXTL-UHFFFAOYSA-N silver zinc Chemical compound [Zn].[Ag] BSWGGJHLVUUXTL-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000000463 material Substances 0.000 claims description 19
- 239000007788 liquid Substances 0.000 claims description 12
- 238000001914 filtration Methods 0.000 claims description 9
- 238000005406 washing Methods 0.000 claims description 9
- 238000000926 separation method Methods 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 238000000967 suction filtration Methods 0.000 claims description 5
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 229910052717 sulfur Inorganic materials 0.000 claims description 3
- 239000011593 sulfur Substances 0.000 claims description 3
- 230000035484 reaction time Effects 0.000 claims 1
- 239000000243 solution Substances 0.000 abstract description 19
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 abstract description 4
- 229960001763 zinc sulfate Drugs 0.000 abstract description 4
- 229910000368 zinc sulfate Inorganic materials 0.000 abstract description 4
- 238000009854 hydrometallurgy Methods 0.000 abstract description 3
- 229910052751 metal Inorganic materials 0.000 abstract description 2
- 239000002184 metal Substances 0.000 abstract description 2
- 239000002893 slag Substances 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract 2
- 239000000843 powder Substances 0.000 abstract 1
- 239000011550 stock solution Substances 0.000 abstract 1
- 238000005303 weighing Methods 0.000 description 5
- 238000003828 vacuum filtration Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000010310 metallurgical process Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/04—Extraction of metal compounds from ores or concentrates by wet processes by leaching
- C22B3/06—Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic acid solutions, e.g. with acids generated in situ; in inorganic salt solutions other than ammonium salt solutions
- C22B3/08—Sulfuric acid, other sulfurated acids or salts thereof
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B11/00—Obtaining noble metals
- C22B11/04—Obtaining noble metals by wet processes
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B19/00—Obtaining zinc or zinc oxide
- C22B19/20—Obtaining zinc otherwise than by distilling
- C22B19/22—Obtaining zinc otherwise than by distilling with leaching with acids
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B19/00—Obtaining zinc or zinc oxide
- C22B19/20—Obtaining zinc otherwise than by distilling
- C22B19/26—Refining solutions containing zinc values, e.g. obtained by leaching zinc ores
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/20—Treatment or purification of solutions, e.g. obtained by leaching
- C22B3/22—Treatment or purification of solutions, e.g. obtained by leaching by physical processes, e.g. by filtration, by magnetic means, or by thermal decomposition
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Manufacturing & Machinery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Geochemistry & Mineralogy (AREA)
- Inorganic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a method for separating silver and zinc from high-zinc silver concentrate, which comprises the steps of pretreatment, pressure leaching reaction and post-treatment, and specifically comprises the following steps: finely grinding the high-zinc silver concentrate to 200 meshes, drying, and preparing a sulfuric acid solution with a certain concentration; adding high zinc silver concentrate powder, sulfuric acid leaching stock solution and dispersant lignin into a high-pressure kettle; setting a preset reaction temperature and a preset stirring speed, introducing high-purity oxygen, and reacting for a certain time to obtain a leaching solution and leaching residues; and performing subsequent treatment on the leaching solution and the leaching residues to obtain silver-containing residues and a zinc sulfate solution. The leaching method of the high-zinc silver concentrate is simple, economic, easy to operate, safe and environment-friendly, more than 99% of silver enters slag, and valuable metal loss is effectively avoided; zinc forms a zinc sulfate solution, the zinc solution can conveniently enter a zinc hydrometallurgy system, the leaching rate reaches more than 91 percent, and the zinc hydrometallurgy system has great practical significance for normal production and reduction of production cost.
Description
Technical Field
The invention belongs to the technical field of metallurgy, and particularly relates to a method for separating silver and zinc from high-zinc silver concentrate.
Background
High zinc silver concentrate is usually treated as normal silver concentrate, causing about 50% of its metallic zinc to be lost. The invention adopts a pressure leaching technology, utilizes the reaction temperature higher than the boiling point of aqueous solution under the condition of normal pressure in a closed reactor, and further enhances the reaction driving force in the metallurgical process, so that zinc enters the solution to form zinc sulfate, and enters a wet zinc smelting system; more than 99% of silver enters the slag, and the pressure leaching technology has the characteristics of short process, high efficiency, reinforcement and environmental protection.
Disclosure of Invention
The invention aims to provide a method for separating silver and zinc from high-zinc silver concentrate.
The invention aims to realize that the method for separating silver and zinc from the high-zinc silver concentrate comprises the steps of pretreatment, pressure leaching reaction and post-treatment, and specifically comprises the following steps:
A. pretreatment: finely grinding the high-zinc silver concentrate, and drying to obtain a material a for later use;
B. pressure leaching reaction: adding a sulfuric acid solution and a dispersant lignin into the material a, and introducing high-purity oxygen at the same time under the conditions of temperature of 130 to 150 ℃ and pressure of 1.2 to 1.4Mpa to perform pressure leaching reaction;
C. and (3) post-treatment: and after the leaching reaction is finished, performing suction filtration and separation on the substances in the kettle to obtain a leaching solution and leaching residues.
The specific operation is as follows:
A. preparing materials: analyzing the content of Zn and Ag in the raw materials, finely grinding the raw materials to 200 meshes, and drying to obtain a material a;
B. pressure leaching reaction: adding a sulfuric acid solution (140-170 g/L), a dispersant lignin (3-6% of the material a), and a solid-liquid volume ratio of 1: (4-7), and introducing high-purity oxygen at the same time for pressure leaching reaction under the conditions of temperature of 130-150 ℃, pressure of 1.2-1.4 Mpa and stirring speed of 700-850 r/min;
C. and (3) post-treatment: and after the leaching reaction is finished, filtering the materials in the kettle, and washing with water with the temperature being equal to or higher than 80 ℃ to obtain a leaching solution and leaching residues, wherein Zn enters the leaching solution, and Ag is retained in the leaching residues.
The invention has the beneficial effects that:
the invention adopts the pressure leaching process to treat the high-zinc silver concentrate, so that Zn and Ag are separated, zn exists in the form of zinc sulfate and can directly enter a zinc hydrometallurgy system; ag is kept in the leaching residue and is still silver concentrate after being dried, so that the loss of valuable metal Zn is avoided.
Detailed Description
The invention is further illustrated by the following examples, but is not intended to be limited in any way, and any modifications or alterations based on the teachings of the invention are intended to fall within the scope of the invention.
The method for separating silver and zinc from high-zinc silver concentrate comprises the steps of pretreatment, pressure leaching reaction and post-treatment, and specifically comprises the following steps:
A. pretreatment: finely grinding the high-zinc silver concentrate, and drying to obtain a material a for later use;
B. pressure leaching reaction: adding a sulfuric acid solution and a dispersant lignin into the material a, and introducing high-purity oxygen for pressure leaching reaction at the temperature of 130-150 ℃ and under the pressure of 1.2-1.4 Mpa;
C. and (3) post-treatment: and after the leaching reaction is finished, performing suction filtration and separation on the substances in the kettle to obtain a leaching solution and leaching residues.
The step A comprises the following steps:
1) The high-zinc silver concentrate consists of the following elements: 40 to 50 percent of zinc, 20 to 40 percent of sulfur and 3000 to 4000g/t of silver;
2) The fine grinding treatment is to grind the high-zinc silver concentrate into a material with the granularity of 200 meshes.
The step B comprises the following steps:
the sulfuric acid solution is prepared by 98% concentrated sulfuric acid, and the preparation concentration of the final flowing acid solution is 140-170 g/L;
the addition amount of the dispersant lignin is 3-6% of the amount of the material a;
the solid-liquid volume ratio of the material a to the sulfuric acid solution is 1: (4-7);
the stirring speed of the pressure leaching reaction is 700 to 850r/min;
the time of the pressure leaching reaction is 2 to 4 hours;
the pressure leaching reaction temperature is 130 to 150 ℃;
the pressure leaching reaction adopts high-purity oxygen, and the pressure is 1.2 to 1.4Mpa.
The high-zinc silver concentrate consists of the following elements: 40 to 50 percent of zinc, 20 to 40 percent of sulfur and 3000 to 4000g/t of silver.
The fine grinding treatment is to grind the high-zinc silver concentrate into a material with the granularity of 200 meshes.
The solid-liquid volume ratio of the material a to the sulfuric acid solution is 1: (4-7).
The concentration of the sulfuric acid solution is 140-170 g/L.
The addition amount of the dispersant lignin is 3-6% of the mass of the material a.
And the pressure leaching reaction in the step B is carried out under the condition of stirring, and the stirring speed is 700-850 r/min.
And B, the time of the pressure leaching reaction in the step B is 2 to 4 hours.
And the suction filtration in the step C also comprises a washing hot filtration step.
The washing heat filtration is carried out by adopting water with the temperature of more than 80 ℃.
The invention is further illustrated by the following specific examples:
example 1
In the following examples, the mass percentage of Zn in the high-zinc silver concentrate is 51.05%, and the mass percentage of Ag in the high-zinc silver concentrate is 3256.8g/t. Finely grinding the high-zinc silver concentrate to 200 meshes, drying, weighing 150g, wherein the solid-to-liquid ratio is 1; after leaching, carrying out solid-liquid separation by vacuum filtration, washing with water at 90 ℃ and filtering, and calculating the leaching rate of zinc according to the element content of leaching residues. The leaching rate of zinc is 93.2 percent, and the actual yield of silver is 99.2 percent.
Example 2
In the following examples, the mass percentage of Zn in the high-zinc silver concentrate is 49.23%, and the mass percentage of Ag in the high-zinc silver concentrate is 3422.5g/t. Finely grinding the high-zinc silver concentrate to 200 meshes, drying, weighing 150g, wherein the solid-to-liquid ratio is 1; after leaching, carrying out solid-liquid separation by vacuum filtration, washing with water at 90 ℃ for hot filtration, and calculating the leaching rate of zinc according to the element content of leaching residues. The leaching rate of zinc is 92.4 percent, and the actual yield of silver is 98.9 percent.
Example 3
In the following examples, the mass percentage of Zn in the high-zinc silver concentrate is 48.83%, and the mass percentage of Ag in the high-zinc silver concentrate is 3578.6g/t. Finely grinding the high-zinc silver concentrate to 200 meshes, drying, weighing 200g of the concentrate, and weighing a solid-to-liquid ratio of 1; after leaching, carrying out solid-liquid separation by vacuum filtration, washing with water at 85 ℃ and carrying out hot filtration, and calculating the leaching rate of zinc according to the element content of leaching residues. The leaching rate of zinc is 94.1 percent, and the actual yield of silver is 99.4 percent.
Example 4
In the following examples, the mass percentage of Zn in the high-zinc silver concentrate is 43.48%, and the mass percentage of Ag in the high-zinc silver concentrate is 3732.3g/t. Finely grinding the high-zinc silver concentrate to 200 meshes, drying, weighing 120g, wherein the solid-to-liquid ratio is 1; after leaching, carrying out solid-liquid separation by vacuum filtration, washing with water at 93 ℃ for hot filtration, and calculating the leaching rate of zinc according to the element content of leaching residues. The leaching rate of zinc is 92.9 percent, and the actual yield of silver is 98.3 percent.
Claims (10)
1. A method for separating silver and zinc from high-zinc silver concentrate is characterized by comprising the steps of pretreatment, pressure leaching reaction and post-treatment, and specifically comprises the following steps:
A. pretreatment: finely grinding the high-zinc silver concentrate, and drying to obtain a material a for later use;
B. pressure leaching reaction: adding a sulfuric acid solution and a dispersant lignin into the material a, and introducing high-purity oxygen for pressure leaching reaction at the temperature of 130-150 ℃ and under the pressure of 1.2-1.4 Mpa;
C. and (3) post-treatment: and after the leaching reaction is finished, performing suction filtration and separation on the substances in the kettle to obtain a leaching solution and leaching residues.
2. The method of claim 1, wherein said concentrate consists of the following elements: 40-50% of zinc, 20-40% of sulfur and 3000-4000 g/t of silver.
3. The method for separating silver and zinc from high zinc-silver concentrate according to claim 1, characterized in that the fine grinding treatment is to fine grind the high zinc-silver concentrate into 200-mesh material.
4. The method for separating silver and zinc from high-zinc silver concentrate according to claim 1, wherein the solid-liquid volume ratio of the material a to the sulfuric acid solution is 1: (4-7).
5. The method of claim 1 or 4, wherein the concentration of the sulfuric acid solution is 140-170 g/L.
6. The method for separating silver and zinc from high-zinc silver concentrate according to claim 1, wherein the addition amount of the lignin as a dispersant is 3-6% of the mass of the material a.
7. The method for separating silver and zinc from high-zinc silver concentrate according to claim 1, wherein the pressure leaching reaction in the step B is carried out under stirring at a speed of 700 to 850r/min.
8. The method for separating silver and zinc from high-zinc silver concentrate according to claim 1, characterized in that the pressure leaching reaction time in step B is 2 to 4 hours.
9. The method for separating silver and zinc from high zinc silver concentrate according to claim 1, wherein the suction filtration in step C further comprises a washing heat filtration step.
10. The process of claim 9, wherein the washing heat filtration is carried out with water having a temperature above 80 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211332329.9A CN115505735A (en) | 2022-10-28 | 2022-10-28 | Method for separating silver and zinc from high-zinc silver concentrate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211332329.9A CN115505735A (en) | 2022-10-28 | 2022-10-28 | Method for separating silver and zinc from high-zinc silver concentrate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115505735A true CN115505735A (en) | 2022-12-23 |
Family
ID=84511420
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211332329.9A Pending CN115505735A (en) | 2022-10-28 | 2022-10-28 | Method for separating silver and zinc from high-zinc silver concentrate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115505735A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04311541A (en) * | 1991-04-08 | 1992-11-04 | Akita Seiren Kk | Wet-type treating method for zinc concentration and zinc leaching residue at the same time |
| JP2004292901A (en) * | 2003-03-27 | 2004-10-21 | Dowa Mining Co Ltd | Leaching method for zinc concentrate |
| CN102134654A (en) * | 2010-01-21 | 2011-07-27 | 云南冶金集团股份有限公司 | Treatment method of zinc sulfide ore concentrates |
| CN105603186A (en) * | 2016-01-24 | 2016-05-25 | 李家元 | Technology for efficiently and selectively separating zinc in zinc sulfide concentrate |
| CN108048651A (en) * | 2017-12-16 | 2018-05-18 | 郴州市金贵银业股份有限公司 | A kind of method of the complicated high silver ore of synthetical recovery |
| CN112458309A (en) * | 2020-12-14 | 2021-03-09 | 昆明冶金研究院有限公司 | Method for improving zinc leaching rate in zinc sulfide concentrate |
-
2022
- 2022-10-28 CN CN202211332329.9A patent/CN115505735A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04311541A (en) * | 1991-04-08 | 1992-11-04 | Akita Seiren Kk | Wet-type treating method for zinc concentration and zinc leaching residue at the same time |
| JP2004292901A (en) * | 2003-03-27 | 2004-10-21 | Dowa Mining Co Ltd | Leaching method for zinc concentrate |
| CN102134654A (en) * | 2010-01-21 | 2011-07-27 | 云南冶金集团股份有限公司 | Treatment method of zinc sulfide ore concentrates |
| CN105603186A (en) * | 2016-01-24 | 2016-05-25 | 李家元 | Technology for efficiently and selectively separating zinc in zinc sulfide concentrate |
| CN108048651A (en) * | 2017-12-16 | 2018-05-18 | 郴州市金贵银业股份有限公司 | A kind of method of the complicated high silver ore of synthetical recovery |
| CN112458309A (en) * | 2020-12-14 | 2021-03-09 | 昆明冶金研究院有限公司 | Method for improving zinc leaching rate in zinc sulfide concentrate |
Non-Patent Citations (1)
| Title |
|---|
| 王吉坤;董英;周廷熙;: "高铁硫化锌精矿加压浸出工业试验及产业化", 中国工程科学, no. 04, 30 September 2005 (2005-09-30) * |
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