CN100447264C - Method for recovering gold from waste of gold plating procedure - Google Patents
Method for recovering gold from waste of gold plating procedure Download PDFInfo
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- CN100447264C CN100447264C CNB2007100680289A CN200710068028A CN100447264C CN 100447264 C CN100447264 C CN 100447264C CN B2007100680289 A CNB2007100680289 A CN B2007100680289A CN 200710068028 A CN200710068028 A CN 200710068028A CN 100447264 C CN100447264 C CN 100447264C
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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
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Abstract
This invention discloses a method for recovering gold from waste gold-plating material. The method comprises: pulverizing waste gold-plating material, performing acid treatment, incinerating, or incinerating and water-quenching (by utilizing different heat expansion and cold contraction coefficients of gold foils and matrices) to separate gold foils from the matrices, adding a mixture of gold foils and matrices into a container, rinsing with water, terminating water rinsing, and pouring water in the container outside. The settlement speed of the gold foils is lower than that of the matrices, so the gold foils are discharged along with water while the matrices are left in the container when water is poured out. The method has such advantages as no cyanide consumption and pollution, simple equipment, high efficiency and high product purity, and is suitable for all waste gold-plating materials.
Description
Technical field
The present invention relates to a kind of method that from waste of gold plating procedure, reclaims gold.
Background technology
Recently the european union directive waste reclaims the enforcement of (WEEE), and adopting the method for economic environmental protection to recycle the waste is the focus and the difficult point of research at present.It is noticeable especially wherein to reclaim precious metal from waste.Along with science and technology development, the needs of state-of-the-art technology and the raising of living standards of the people, electronic product and civilian gold coated article update and superseded product day by day increases (as: eliminating computer, waste mobile phone, wiring board, the useless gold coated article of electric connector etc.), in corresponding electronic industry production and the industrial refuse, many useless gold coated articles can appear.Simultaneously, because artificial exploitation, make that gold ore is petered out on the earth, therefore reclaiming gold from gold-containing scrap will be the important component part that gold is produced.Thereby this work has very important and profound significance.
The ordinary method that reclaims gold from these refuse material has nitro-compound oxidation style, aqua regia dissolution method, molten method, thiocarbamide method and the electrolytic process etc. of soaking of nitric acid.These method shortcomings are many, as: cyanating solution severe toxicity, chloroazotic acid is seriously polluted, the rate of recovery is low, purity is low, complex process, cost is high and it is big etc. to invest.Therefore the investigator is devoted to explore the environmental protection and economy recovery method of gold-containing scrap.Beijing precious metal smelting factory uses I
2-NaI-H
2The O system reclaims gold with reduced iron powder displacement or S-WAT reduction method again with the gold plate corrosion on the waste electronic device.The auri waste material (waste slurry, cotton balls, circuit element) that Kunming Institute of Precious Metals produces thick-film technique evaporates respectively, burns and be broken, concentrates roasting then, roasting hydrochloric acid for dreg eccysis soluble impurity, and chloroazotic acid leaches gold, platinum, palladium, uses Na
2SO
3The preferential precipitation gold.It is raw material that Kunming Institute of Precious Metals reclaims gold with spent catalyst, repeatedly leaches with hydrochloric acid and oxidizer containing chlorine, makes gold change solution over to, and zinc dust precipitation, hydrochloric acid add the oxidizer containing chlorine dissolving, oxalic acid reduce the proof gold powder.In recent years, Tsing-Hua University has synthesized diisooctyl thioether and diisooctyl sulfoxide, has studied the extraction ability of precious metal, has set up the technology that reclaims gold with diisooctyl thioether extracting gold from electron device.
In some gold mine enterprises,, adopt flotation process to replace traditional concentration to reclaim gold in order to solve the maximum problem that reclaims gold (particularly mustard gold and " easily floating " gold) from placer.Ability and " easily floating " gold that mustard gold is suspended state have determined with its possibility of flotation process recovery to a certain extent to the ability of water surface migration.External some enterprise has realized flotation gold from gold dust aborning.The method Lian Watede flotation machine that Denver company makes can be used for the recovery of gold dust.The flotation column that Russia national non-ferrous metal research institute makes, (pH=7～9) carry out flotation in neutrality or weak alkaline medium.These gold are " easily floating " gold and particulate gold in ore in sand form mainly, and granularity is very thin.In addition, also have flats and sheet macrobead (1mm) gold to be distributed in the crack of quartzy inclusion (forming in the placer handling process).The factor affecting of the floatation recovery method gold flotation of mustard gold and " easily floating " gold is a lot, mainly contains: ore particle granularity, collecting agent kind and consumption, ore pulp liquid-solid ratio, concentrate yield etc.
Summary of the invention
The object of the present invention is to provide a kind of method that from waste of gold plating procedure, reclaims gold.
The technical solution adopted for the present invention to solve the technical problems is: utilize the settling velocity characteristics slow than matrix of goldleaf that goldleaf is separated with matrix, reclaim gold from waste of gold plating procedure; Promptly at first by acid treatment, burning disposal or utilize the gold-plated characteristics different that goldleaf in the broken waste of gold plating procedure is peeled off from matrix with the cold shrinkage coefficient of matrix thermal expansion, pour water in the mixed body after goldleaf and matrix are peeled off, the settling velocity of visible goldleaf is slow than matrix when stopping to wash by water, matrix sinks to container bottom very soon, and goldleaf is suspended in to sink gradually in the water, topple over the water in the container this moment, and then goldleaf flows out with water, and matrix is stayed in the container; If there is a small amount of goldleaf still to stay in the container, can repeats bath and separate.This method utilizes the settling velocity of the goldleaf characteristics slow than matrix that goldleaf is separated with matrix, reclaims gold from waste of gold plating procedure.
Compare with background technology, the beneficial effect that the present invention has is:
(1) the present invention has avoided using highly toxic substance such as prussiate and the environmental pollution that causes.
(2) to have equipment simple in the present invention, and cost is low, simple to operately more easily grasps.Gain quick return, and purity is higher, and less investment, and economic benefit is obvious.
(3) this recovery method is suitable for all waste of gold plating procedure.
(4) with to adopt flotation process to reclaim " easily floating " golden principle, object and processing method from placer different.
A. principle difference: floatation recovery method of mustard gold and " easily floating " gold adopts collecting agent that mustard gold and " easily floating " gold are floated on the pulp slurry, rather than utilizes mustard gold to separate with the slower characteristics of settling velocity among " easily floating " Jin Zaishui;
B. object difference: the floatation recovery method of mustard gold and " easily floating " gold is at " easily floating " in placer gold and particulate gold; The present invention is directed to waste of gold plating procedure;
C. processing method difference: floatation recovery method complex process, and the factor affecting of flotation is a lot, mainly contains: ore particle granularity, collecting agent kind and consumption, ore pulp liquid-solid ratio, concentrate yield etc.
Embodiment
A kind of settling velocity characteristics slow than matrix of goldleaf of utilizing reclaim golden embodiment from waste of gold plating procedure:
Embodiment 1:
The scrap stock that produce in electric connector gold coated article waste material and the production thereof, matrix is the galss fiber reinforced resin composite sheet, size differs in size for about 0.2 to 4 square centimeter, remove impurity, clean up, join concentration and be in 15%～70% the salpeter solution, heating in water bath.After waste material top layer gold foil and matrix come off, stop heating cooling, topple over upper solution, the mixed body after obtaining goldleaf and matrix and peeling off, pour water in the mixed body after goldleaf and matrix are peeled off, the settling velocity of visible goldleaf is slow than matrix when stopping to wash by water, and matrix sinks to container bottom very soon, and goldleaf is suspended in to sink gradually in the water, topple over the water in the container this moment, then goldleaf flows out with water, and matrix is stayed in the container, the also recyclable filler of doing of matrix.Gold, the purity about 99.9% of gold have been realized from waste material, reclaiming.
Embodiment 2:
The mainboard of waste mobile phone computer is broken into small pieces, joins concentration and is in 15%～70% the salpeter solution, and heating in water bath also stirs.After waste material top layer gold foil and matrix come off, stop heating cooling, topple over upper solution, the Cu that contains in the solution, Ag and Pd etc. can separate extraction by adding sodium-chlor, oxalic acid, ammoniacal liquor etc.Container bottom is the mixed body after goldleaf and matrix are peeled off, pour water in the mixed body after goldleaf and matrix are peeled off, the settling velocity of visible goldleaf is slow than matrix when stopping to wash by water, matrix sinks to container bottom very soon, and goldleaf is suspended in to sink gradually in the water, topple over the water in the container this moment, and then goldleaf flows out with water, and matrix is stayed in the container.Gold, the purity about 99.9% of gold have been realized from waste material, reclaiming.
Embodiment 3:
It is in 15%～70% the salpeter solution that the printed-wiring board (PWB) scrap stock join concentration, and heating in water bath also stirs.After waste material top layer gold foil and matrix come off, stop the heating cooling, topple over upper solution, other metals such as the copper that contains in the solution can pass through separation and Extraction again.Container bottom is the mixed body after goldleaf and matrix are peeled off, pour water in the mixed body after goldleaf and matrix are peeled off, the settling velocity of visible goldleaf is slow than matrix when stopping to wash by water, matrix sinks to container bottom very soon, and goldleaf is suspended in to sink gradually in the water, topple over the water in the container this moment, and then goldleaf flows out with water, and matrix is stayed in the container.Gold, the purity about 99.9% of gold have been realized from waste material, reclaiming.
Embodiment 4:
The mainboard fragment of electric connector gold coated article waste material, waste mobile phone computer and printed circuit board (PCB) scrap stock etc. are put into retort furnace, are warming up to 450 ℃, and calcination 1.5h removes organism; After the cooling, former waste material top layer gold foil and matrix come off and pour water in the mixed body after goldleaf and matrix are peeled off, the settling velocity of visible goldleaf is slow than matrix when stopping to wash by water, matrix sinks to container bottom very soon, and goldleaf is suspended in to sink gradually in the water, topple over the water in the container this moment, and then goldleaf flows out with water, and matrix is stayed in the container.Realized from waste material reclaiming gold, remained in some metals of gold surface, obtained golden purity about 99% with sour dissolution process.
Embodiment 5:
Waste material and scrap stock gold-plated on the metallic copper matrix are put into retort furnace, are warming up to 400 ℃, put into the water quenching then, because the cold shrinkage coefficient difference of matrix thermal expansion, waste material top layer gold foil and copper matrix come off.Pour water in the mixed body after goldleaf and matrix are peeled off, the settling velocity of visible goldleaf is slow than matrix when stopping to wash by water, and the copper matrix sinks to container bottom very soon, and goldleaf is suspended in to sink gradually in the water, topple over the water in the container this moment, and then goldleaf flows out with water, and the copper matrix is stayed in the container.Realized from waste material reclaiming gold, remained in the copper metal of gold surface, obtained golden purity about 99.9% with sour dissolution process.
Claims (4)
1, a kind of method that reclaims gold from waste of gold plating procedure is characterized in that: utilize the settling velocity characteristics slow than matrix of goldleaf that goldleaf is separated with matrix, reclaim gold from waste of gold plating procedure; Promptly at first by acid treatment, burning disposal or utilize the gold-plated characteristics different that goldleaf in the broken waste of gold plating procedure is peeled off from matrix with the cold shrinkage coefficient of matrix thermal expansion, pour water in the mixed body after goldleaf and matrix are peeled off, the settling velocity of visible goldleaf is slow than matrix when stopping to wash by water, matrix sinks to container bottom very soon, and goldleaf is suspended in to sink gradually in the water, topple over the water in the container this moment, and then goldleaf flows out with water, and matrix is stayed in the container; If there is a small amount of goldleaf still to stay in the container, can repeats bath and separate; This method utilizes the settling velocity of the goldleaf characteristics slow than matrix that goldleaf is separated with matrix, reclaims gold from waste of gold plating procedure.
2, a kind of method that from waste of gold plating procedure, reclaims gold according to claim 1, it is characterized in that: described goldleaf peels off from matrix, is that broken waste of gold plating procedure is removed impurity, cleans up, join in the salpeter solution, heating in water bath and stirring are peeled off.
3, a kind of method that reclaims gold from waste of gold plating procedure according to claim 1, it is characterized in that: described goldleaf peels off from matrix, is with broken waste of gold plating procedure burning disposal, is warming up to 400～600 ℃ of processing, removes organism, peels off after the cooling.
4, a kind of method that from waste of gold plating procedure, reclaims gold according to claim 1, it is characterized in that: described goldleaf peels off from matrix, be that broken waste of gold plating procedure is put into the retort furnace burning disposal, be warming up to 400～600 ℃, put into the water quenching then, because the cold shrinkage coefficient difference of matrix thermal expansion is peeled off.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100680289A CN100447264C (en) | 2007-04-13 | 2007-04-13 | Method for recovering gold from waste of gold plating procedure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100680289A CN100447264C (en) | 2007-04-13 | 2007-04-13 | Method for recovering gold from waste of gold plating procedure |
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| Publication Number | Publication Date |
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| CN101092663A CN101092663A (en) | 2007-12-26 |
| CN100447264C true CN100447264C (en) | 2008-12-31 |
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| CNB2007100680289A Expired - Fee Related CN100447264C (en) | 2007-04-13 | 2007-04-13 | Method for recovering gold from waste of gold plating procedure |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101748283B (en) * | 2008-12-01 | 2012-09-12 | 中山市紫方环保技术有限公司 | Method and equipment for recovering gold from gold jewelry polishing powder |
| CN102465205B (en) * | 2010-11-04 | 2013-08-28 | 中国石油化工股份有限公司 | Method for recycling gold from surface coating of scanning electron microscope sample |
| CN103981366A (en) * | 2013-02-07 | 2014-08-13 | 欣兴电子股份有限公司 | Method for recovery of metal from circuit board |
| CN108374090B (en) * | 2018-03-28 | 2019-07-12 | 广东致卓环保科技有限公司 | A kind of gold refinement method applied to the gold-plated waste liquid of sulfurous acid system |
| CN111440948A (en) * | 2019-01-17 | 2020-07-24 | 东莞珂洛赫慕电子材料科技有限公司 | Recovery process of valuable components in waste thick film |
| JPWO2023286711A1 (en) * | 2021-07-13 | 2023-01-19 |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1118014A (en) * | 1994-08-28 | 1996-03-06 | 刘青海 | Simple method for recovering gold from waste material |
| CN1614046A (en) * | 2004-10-20 | 2005-05-11 | 东华大学 | Extraction of gold from PCB by catalyst oxidation |
| JP2007016259A (en) * | 2005-07-05 | 2007-01-25 | Kyoei Metal Kk | System for collecting gold while recycling iodine ion in gold-removing liquid |
-
2007
- 2007-04-13 CN CNB2007100680289A patent/CN100447264C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1118014A (en) * | 1994-08-28 | 1996-03-06 | 刘青海 | Simple method for recovering gold from waste material |
| CN1614046A (en) * | 2004-10-20 | 2005-05-11 | 东华大学 | Extraction of gold from PCB by catalyst oxidation |
| JP2007016259A (en) * | 2005-07-05 | 2007-01-25 | Kyoei Metal Kk | System for collecting gold while recycling iodine ion in gold-removing liquid |
Non-Patent Citations (4)
| Title |
|---|
| 从各种含金废料中再生回收金. 尚殿英.有色金属（冶炼部分），第5期. 1988 |
| 从各种含金废料中再生回收金. 尚殿英.有色金属（冶炼部分），第5期. 1988 * |
| 从含金废料中回收金与金的提纯. 王敏.新疆有色金属. 2003 |
| 从含金废料中回收金与金的提纯. 王敏.新疆有色金属. 2003 * |
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| CN101092663A (en) | 2007-12-26 |
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