CN101760624A - Method for extracting gold by using circuit board anode mud - Google Patents
Method for extracting gold by using circuit board anode mud Download PDFInfo
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- CN101760624A CN101760624A CN200910193748A CN200910193748A CN101760624A CN 101760624 A CN101760624 A CN 101760624A CN 200910193748 A CN200910193748 A CN 200910193748A CN 200910193748 A CN200910193748 A CN 200910193748A CN 101760624 A CN101760624 A CN 101760624A
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- immersion liquid
- sodium
- leached
- slag
- added
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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
- 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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- Manufacture And Refinement Of Metals (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention relates to a method for extracting gold by using circuit board anode mud. The method comprises the following steps that: sulfuric acid, sodium chloride and sodium chlorate are added in anode mud, and leached liquid and leached residue are obtained through filtration; the leached liquid is cooled, crystals are precipitated and copper is recovered; sodium bromide, hydrogen chloride, sodium hypochlorite and sodium chloride are added in the obtained leached residue, and leached liquid containing gold and leached residue containing silver are obtained through filtration; ammonia water is added in the leached residue containing silver, and leached liquid containing silver and leached residue are obtained through filtration; hydrazine hydrate is added to reduce the leached liquid containing silver and silver powder is obtained; and sodium sulfite is added to reduce the obtained leached liquid containing gold, then hydrogen nitrate and sodium hydroxide are added and finally gold powder is obtained. The invention solves the difficulty in China that precious metals are hard to be separated from the anode mud after cathode copper is extracted from waste circuit boards through miscellaneous copper alloy electrolysis, and has the advantages that the recovery rate of the precious metals is improved, the resources are protected and the economic benefit is improved.
Description
Technical field
The present invention relates to a kind of method for extracting gold by using circuit board anode mud.
Background technology
The wiring board treatment technology is researched and developed so far, and the purification technique for metal in the broken rear board mainly contains treatment technology methods such as wet method, burning method, biological process.Wet method is that ion enters into solution with the acid treatment abandoned printed circuit board of strong oxidizing property with wherein contained burning; From solution, utilize the difference of each metal ion species reductibility then, adopt displacement or electrolysis treatment technology to reclaim metal.This kind treatment process is made oxygenant with acid, can produce a large amount of NO gases, contaminate environment in treating processes.Precious metal contains a large amount of metal ions after reclaiming in the solution, later stage improvement investment is bigger, if deal with improperly, easily causes secondary pollution.
Burning method is earlier abandoned printed circuit board to be put into smelting furnace to burn, thereby adopts the treating processes of fire-refining copper and electrolytic refined copper to reclaim precious metal in the lime-ash after components such as resin are effectively removed again.Owing to contain toxic substances such as bromine, benzene, lead and mercury in the waste printed wiring board, can produce the poison gas that contains Dioxins, furans and polychlorinated biphenyl material during burning.And the rate of recovery of other metal such as tin and lead etc. is but very low, and serious waste of resources produces certain influence to economic return.
The technology of biological process is simple, working cost is low, easy and simple to handle, but that the cultivation fee of microorganism reaches maturity more greatly is lower.Other treatment process is generally external research and development technology, and expense is big, takes up an area of extensively, and is not suitable for China's national situation, and generalization is poor.
Summary of the invention
Technical problem to be solved: the present invention is directed to the prior art deficiency, provide a kind of higher, the method for extracting gold by using circuit board anode mud that can increase economic efficiency to the precious metal rate of recovery.
Technical scheme: a kind of method for extracting gold by using circuit board anode mud, its step is as follows:
(1), in anode sludge weight, in the anode sludge, add 15～20% sulfuric acid H
2SO
4, 10～15% sodium chloride NaCl, 2～5% sodium chlorate NaClO
3, filter immersion liquid, soak slag; Gained immersion liquid cooling, crystal is separated out copper and is reclaimed;
(2), step (1) gained soaks slag, to soak slag weight, adds 10～20% Sodium Bromide NaBr, 5～10% hydrogenchloride HCl, 5～10% clorox NaCIO, 2～5% sodium chloride NaCI, filter contain golden immersion liquid, argentiferous soaks slag;
(3), step (2) gained argentiferous soaks slag, soaks slag weight in silver, adds 20～30% ammoniacal liquor NH
3.H
2O, filter the argentiferous immersion liquid, soak slag; The argentiferous immersion liquid adds 8～10% hydrazine hydrate NH
2NH
2.H
2The O reduction gets silver powder;
(4), step (2) gained contains golden immersion liquid, in golden immersion liquid weight, adds 15～20% S-WAT Na
2SO
3The reduction, and add 8～10% nitric acid HNO3,8～10% sodium hydroxide NaOH get bronze.
All be to be controlled at 25 ℃～30 ℃ reactions of temperature 60 minutes in above-mentioned four steps.
Beneficial effect of the present invention:
After the invention solves China's waste and old circuit board composition brass alloy electrowinning cathode copper, the difficult problem of anode sludge extraction separation precious metal improves the precious metal rate of recovery, finally reaches filter residue non-pollution discharge standard.Precious metal total yield 〉=97%, precious metal purity are 99.99%.Gold recovery 〉=99% wherein, silver raising recovery rate 〉=97.5%; The liquid non-pollution discharge.The present invention is higher to the precious metal rate of recovery, and resources conseravtion can be increased economic efficiency.
Embodiment
Embodiment 1
The present embodiment method for extracting gold by using circuit board anode mud, its step is as follows:
(1), in anode sludge weight, in the anode sludge, add 15% sulfuric acid H
2SO
4, 10% sodium chloride NaCl, 2% sodium chlorate NaClO
3, filter immersion liquid, soak slag; Gained immersion liquid cooling, crystal is separated out copper and is reclaimed;
(2), step (1) gained soaks slag, to soak slag weight, adds 10% Sodium Bromide NaBr, 5% hydrogenchloride HCl, 5% clorox NaCIO, 2% sodium chloride NaCI, filter contain golden immersion liquid, argentiferous soaks slag;
(3), step (2) gained argentiferous soaks slag, soaks slag weight in silver, adds 20% ammoniacal liquor NH
3.H
2O, filter the argentiferous immersion liquid, soak slag; The argentiferous immersion liquid adds 8% hydrazine hydrate NH
2NH
2.H
2The O reduction gets silver powder;
(4), step (2) gained contains golden immersion liquid, in golden immersion liquid weight, adds 15% S-WAT Na
2SO
3The reduction, and add 8% nitric acid HNO3,8% sodium hydroxide NaOH gets bronze.
All be to be controlled at 25 ℃ of reactions of temperature 60 minutes in above-mentioned four steps.
Gold recovery 99.%, silver raising recovery rate 97.5%; The liquid non-pollution discharge.
Embodiment 2
The present embodiment method for extracting gold by using circuit board anode mud, its step is as follows:
(1), in anode sludge weight, in the anode sludge, add 20% sulfuric acid H
2SO
4, 15% sodium chloride NaCl, 5% sodium chlorate NaClO
3, filter immersion liquid, soak slag; Gained immersion liquid cooling, crystal is separated out copper and is reclaimed;
(2), step (1) gained soaks slag, to soak slag weight, adds 20% Sodium Bromide NaBr, 10% hydrogenchloride HCl, 10% clorox NaCIO, 5% sodium chloride NaCI, filter contain golden immersion liquid, argentiferous soaks slag;
(3), step (2) gained argentiferous soaks slag, soaks slag weight in silver, adds 30% ammoniacal liquor NH
3.H
2O, filter the argentiferous immersion liquid, soak slag; The argentiferous immersion liquid adds 10% hydrazine hydrate NH
2NH
2.H
2The O reduction gets silver powder;
(4), step (2) gained contains golden immersion liquid, in golden immersion liquid weight, adds 20% S-WAT Na
2SO
3The reduction, and add 10% nitric acid HNO3,10% sodium hydroxide NaOH gets bronze.
All be to be controlled at 30 ℃ of reactions of temperature 60 minutes in above-mentioned four steps.
Gold recovery 99.8%, silver raising recovery rate 99%; The liquid non-pollution discharge.
Embodiment 3
The present embodiment method for extracting gold by using circuit board anode mud, its step is as follows:
(1), in anode sludge weight, in the anode sludge, add 18% sulfuric acid H
2SO
4, 13% sodium chloride NaCl, 3% sodium chlorate NaClO
3, filter immersion liquid, soak slag; Gained immersion liquid cooling, crystal is separated out copper and is reclaimed;
(2), step (1) gained soaks slag, to soak slag weight, adds 15% Sodium Bromide NaBr, 7% hydrogenchloride HCl, 7% clorox NaCIO, 4% sodium chloride NaCI, filter contain golden immersion liquid, argentiferous soaks slag;
(3), step (2) gained argentiferous soaks slag, soaks slag weight in silver, adds 25% ammoniacal liquor NH
3.H
2O, filter the argentiferous immersion liquid, soak slag; The argentiferous immersion liquid adds 9% hydrazine hydrate NH
2NH
2.H
2The O reduction gets silver powder;
(4), step (2) gained contains golden immersion liquid, in golden immersion liquid weight, adds 17% S-WAT Na
2SO
3The reduction, and add 9% nitric acid HNO3,9% sodium hydroxide NaOH gets bronze.
All be to be controlled at 28 ℃ of reactions of temperature 60 minutes in above-mentioned four steps.
Gold recovery 99.2%, silver raising recovery rate 98%; The liquid non-pollution discharge.
Claims (1)
1. method for extracting gold by using circuit board anode mud is characterized in that step is as follows:
(1), in anode sludge weight, in the anode sludge, add 15～20% sulfuric acid H
2SO
4, 10～15% sodium chloride NaCl, 2～5% sodium chlorate NaClO
3, filter immersion liquid, soak slag; Gained immersion liquid cooling, crystal is separated out copper and is reclaimed;
(2), step (1) gained soaks slag, to soak slag weight, adds 10～20% Sodium Bromide NaBr, 5～10% hydrogenchloride HCl, 5～10% clorox NaCIO, 2～5% sodium chloride NaCI, filter contain golden immersion liquid, argentiferous soaks slag;
(3), step (2) gained argentiferous soaks slag, soaks slag weight in silver, adds 20～30% ammoniacal liquor NH
3.H
2O, filter the argentiferous immersion liquid, soak slag; The argentiferous immersion liquid adds 8～10% hydrazine hydrate NH
2NH
2.H
2The O reduction gets silver powder;
(4), step (2) gained contains golden immersion liquid, in golden immersion liquid weight, adds 15～20% S-WAT Na
2SO
3The reduction, and add 8～10% nitric acid HNO3,8～10% sodium hydroxide NaOH get bronze.
All be to be controlled at 25 ℃～30 ℃ reactions of temperature 60 minutes in above-mentioned four steps.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101937487A CN101760624B (en) | 2009-11-09 | 2009-11-09 | Method for extracting gold by using circuit board anode mud |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101937487A CN101760624B (en) | 2009-11-09 | 2009-11-09 | Method for extracting gold by using circuit board anode mud |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101760624A true CN101760624A (en) | 2010-06-30 |
| CN101760624B CN101760624B (en) | 2013-05-29 |
Family
ID=42492003
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101937487A Expired - Fee Related CN101760624B (en) | 2009-11-09 | 2009-11-09 | Method for extracting gold by using circuit board anode mud |
Country Status (1)
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|---|---|
| CN (1) | CN101760624B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106086427A (en) * | 2016-08-25 | 2016-11-09 | 浙江亚栋实业有限公司 | A kind of recovery metal and method of side-product from the earth of positive pole |
| CN106119567A (en) * | 2016-09-07 | 2016-11-16 | 深圳市真牛精工科技有限公司 | A kind of method of gold of purifying metals |
| CN110029230A (en) * | 2019-04-11 | 2019-07-19 | 陕西师范大学 | A kind of green environmental protection non-cyanide gold extraction agent, preparation method and application thereof |
| CN115094232A (en) * | 2022-05-26 | 2022-09-23 | 帕鲁特有限责任公司 | Method for recovering heavy sand |
| US20230175096A1 (en) * | 2021-12-03 | 2023-06-08 | Beijing University Of Technology | Cost-effective method for recovering precious metals in circuit board components |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1061044A (en) * | 1990-10-29 | 1992-05-13 | 中国有色金属工业总公司昆明贵金属研究所 | From copper anode mud, reclaim Au, Pt, Pd and tellurium |
| CN1114361A (en) * | 1994-06-28 | 1996-01-03 | 陕西深华金属材料研究所 | Method for recovering Ag, Au, Sb, Cu and Pb from Pb anode slime |
| CN101195865B (en) * | 2007-12-25 | 2010-07-21 | 金川集团有限公司 | Method for extracting silver from silver slag |
-
2009
- 2009-11-09 CN CN2009101937487A patent/CN101760624B/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106086427A (en) * | 2016-08-25 | 2016-11-09 | 浙江亚栋实业有限公司 | A kind of recovery metal and method of side-product from the earth of positive pole |
| CN106119567A (en) * | 2016-09-07 | 2016-11-16 | 深圳市真牛精工科技有限公司 | A kind of method of gold of purifying metals |
| CN106119567B (en) * | 2016-09-07 | 2019-02-15 | 深圳市真牛精工科技有限公司 | A method of gold of purifying metals |
| CN110029230A (en) * | 2019-04-11 | 2019-07-19 | 陕西师范大学 | A kind of green environmental protection non-cyanide gold extraction agent, preparation method and application thereof |
| US20230175096A1 (en) * | 2021-12-03 | 2023-06-08 | Beijing University Of Technology | Cost-effective method for recovering precious metals in circuit board components |
| US11753699B2 (en) * | 2021-12-03 | 2023-09-12 | Beijing University Of Technology | Cost-effective method for recovering precious metals in circuit board components |
| CN115094232A (en) * | 2022-05-26 | 2022-09-23 | 帕鲁特有限责任公司 | Method for recovering heavy sand |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101760624B (en) | 2013-05-29 |
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Granted publication date: 20130529 Termination date: 20131109 |