CN105385854A - Method for recycling precious metal including gold, platinum and palladium in jewelry processing polishing powder - Google Patents
Method for recycling precious metal including gold, platinum and palladium in jewelry processing polishing powder Download PDFInfo
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- CN105385854A CN105385854A CN201510915652.2A CN201510915652A CN105385854A CN 105385854 A CN105385854 A CN 105385854A CN 201510915652 A CN201510915652 A CN 201510915652A CN 105385854 A CN105385854 A CN 105385854A
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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
Abstract
The invention relates to the field of comprehensive utilization of resources and circular economy, in particular to a method for recycling precious metal including gold, platinum and palladium in jewelry processing polishing powder. According to the method, the wet recovery method is adopted, firstly, the polishing powder is incinerated at a high temperature to remove organic matter adhering to surfaces so that fine particles of the precious metal can be exposed, then the incinerated polishing powder is dissolved in aqua regia so as to leach out the precious metal, and afterwards the precious metal is separated and purified step by step. According to the method for recycling the precious metal in the jewelry processing polishing powder, operation is easy and convenient, cost is low, the precious metal can be recycled rapidly and effectively, and the circulation speed of the precious metal is increased.
Description
Technical field
The present invention relates to comprehensive utilization of resources and recycling economy field, particularly relate to the method reclaiming Precious Metals-Gold, platinum and palladium in processing of ornament polishing powder.
Technical background
Along with the development of human society, the demand of the mankind to precious metal constantly increases, and therefore, needs to improve precious metal to greatest extent and recycles rate.Because the chemical stability of precious metal is very high, the regeneration for them is recycled and is provided condition, and itself is rare expensive in addition, and regeneration is reclaimed lucrative.
In processing of ornament polishing powder, predominant precious metal is gold, platinum and palladium, and for this polishing powder, we should strengthen the recycling of wherein precious metal.
Summary of the invention
The invention discloses the method reclaiming Precious Metals-Gold, platinum and palladium in processing of ornament polishing powder, the process employs the method for hydrometallurgic recovery, first polishing powder is at high temperature burned the organism of removing surface adhesion, to expose precious metal fine particle, then the polishing powder leaching precious metal after burning with aqua regia dissolution, the more each precious metal of substep separating-purifying.In the present invention's relevant processing of ornament polishing powder, method for recovering precious metals is easy and simple to handle, and cost is low, fast and effeciently can reclaim precious metal, improves precious metal turnaround speed.
Reclaim the method for Precious Metals-Gold, platinum and palladium in processing of ornament polishing powder, process is:
(1) burning process: get processing of ornament polishing powder 60kg, use Stainless Steel Disc splendid attire, sabot thickness is no more than 5cm, Stainless Steel Disc is placed in intermediate frequency furnace, burn in 800-900 DEG C, need in burning process to stir to make burning abundant with shovel, metal particle is exposed to the greatest extent to guarantee that the organism of powder particle surface burns, burn the polishing powder thoroughly and should be silver gray, if outward appearance is black, burning not thorough, for not affecting follow-up leaching yield, should continue to burn, until polishing powder is silver gray after burning, obtain polishing powder a;
(2) platinum is separated: the polishing powder burned leaches through chloroazotic acid, the concentrated solution b catching up with nitre to obtain containing Precious Metals-Gold, platinum and palladium, after solution b is cooled, oxygenant 5-10kg is added under stirring, add ammonium salt afterwards with platinum precipitation, stir and occur yellow mercury oxide, until stop when producing without yellow mercury oxide adding ammonium salt, filter after leaving standstill 2-10h, obtain platinum yellow and ammonium chloroplatinate, platinum yellow burns and obtains platina, obtains solution c simultaneously;
(3) gold is separated: stir in solution c and add weak reductant reduction gold, occur that trickle bronze is separated out, to producing without precipitation, then leave standstill 8-10 hour, filter and obtain cake of gold, obtain solution d simultaneously,
(4) tail washings palladium is separated: heat solution d, temperature remains between 30-100 DEG C, then passes into oxygen 5-15L, adds ammonium chloride afterwards, until when solution has bubble to occur, stop adding ammonium chloride, then stir 1h, stop heating and stir, after leaving standstill 8-10h again, filter to obtain filter residue
(5) precious metal refinery is purified: the cake of gold in the platina in process (2), process (3), the filter residue in process (4) are carried out Refining respectively, namely obtains noble metal platinum, gold and palladium.
The method of Precious Metals-Gold, platinum and palladium is reclaimed in processing of ornament polishing powder, it is characterized in that: in process (2), chloroazotic acid leaches, its process is: dropped in the reactor of 300L glass lining by the polishing powder burned, add the chloroazotic acid 150L now joined, oil bath is heated, 100-150 DEG C of agitation leach reaction 5h, after solution cooling, extract supernatant liquor out with siphonage, obtain clear liquid 1, residue stays and continues to add chloroazotic acid 100L agitation leach 3h at 100-150 DEG C, siphon off supernatant liquor after cooling, obtains clear liquid 2; Residual residue adds water cleaning 3 times, uses water 30L at every turn, merges the clear liquid 1,2 in this process and scavenging solution, obtain required solution.
The method of Precious Metals-Gold, platinum and palladium is reclaimed in processing of ornament polishing powder, it is characterized in that: concentrate in process (2) and catch up with nitre, its process is: chloroazotic acid is leached gained solution and move in 500L titanium reactor, stir at 150-200 DEG C and catch up with nitre, catch up with nitre time controling in 12h-24h, the effusion of 5L hydrochloric acid in order to nitrate ion is repeatedly added in process, with nitrogen oxide gas Test paper test result for judging criterion, if nitrogen oxide gas Test paper is unchanged, stop adding hydrochloric acid, obtain required solution.
Reclaim the method for Precious Metals-Gold, platinum and palladium in processing of ornament polishing powder, it is characterized in that: the oxygenant in process (2) is the one in hydrogen peroxide, clorox.
Reclaim the method for Precious Metals-Gold, platinum and palladium in processing of ornament polishing powder, it is characterized in that: the ammonium salt in process (2) is ammonium chloride.
Reclaim the method for Precious Metals-Gold, platinum and palladium in processing of ornament polishing powder, the weak reductant that it is characterized in that in process (3) is the one in S-WAT, oxalic acid, ethanol, formic acid.
Embodiment
Reclaim the method for Precious Metals-Gold, platinum and palladium in processing of ornament polishing powder, process is:
(1) burning process: get processing of ornament polishing powder 60kg, use Stainless Steel Disc splendid attire, sabot thickness is no more than 5cm, Stainless Steel Disc is placed in intermediate frequency furnace, burn in 800-900 DEG C, need in burning process to stir to make burning abundant with shovel, metal particle is exposed to the greatest extent to guarantee that the organism of powder particle surface burns, burn the polishing powder thoroughly and should be silver gray, if outward appearance is black, burning not thorough, for not affecting follow-up leaching yield, should continue to burn, until polishing powder is silver gray after burning, obtain polishing powder a;
(2) platinum is separated: the polishing powder burned leaches through chloroazotic acid, the concentrated solution b catching up with nitre to obtain containing Precious Metals-Gold, platinum and palladium, after solution b is cooled, oxygenant 5-10kg is added under stirring, add ammonium salt afterwards with platinum precipitation, stir and occur yellow mercury oxide, until stop when producing without yellow mercury oxide adding ammonium salt, filter after leaving standstill 2-10h, obtain platinum yellow and ammonium chloroplatinate, platinum yellow burns and obtains platina, obtains solution c simultaneously;
(3) gold is separated: stir in solution c and add weak reductant reduction gold, occur that trickle bronze is separated out, to producing without precipitation, then leave standstill 8-10 hour, filter and obtain cake of gold, obtain solution d simultaneously,
(4) tail washings palladium is separated: heat solution d, temperature remains between 30-100 DEG C, then passes into oxygen 5-15L, adds ammonium chloride afterwards, until when solution has bubble to occur, stop adding ammonium chloride, then stir 1h, stop heating and stir, after leaving standstill 8-10h again, filter to obtain filter residue
(5) precious metal refinery is purified: the cake of gold in the platina in process (2), process (3), the filter residue in process (4) are carried out Refining respectively, namely obtains noble metal platinum, gold and palladium.
Wherein reclaim the method for Precious Metals-Gold, platinum and palladium in processing of ornament polishing powder, in process (2), chloroazotic acid leaches, its process is: dropped in the reactor of 300L glass lining by the polishing powder burned, add the chloroazotic acid 150L now joined, oil bath is heated, 100-150 DEG C of agitation leach reaction 5h, after solution cooling, extract supernatant liquor out with siphonage, obtain clear liquid 1, residue stays and continues to add chloroazotic acid 100L agitation leach 3h at 100-150 DEG C, siphon off supernatant liquor after cooling, obtains clear liquid 2; Residual residue adds water cleaning 3 times, uses water 30L at every turn, merges the clear liquid 1,2 in this process and scavenging solution, obtain required solution, and further 2 oil bath temperatures are preferably 130 DEG C, 120 DEG C respectively.
Wherein reclaim the method for Precious Metals-Gold, platinum and palladium in processing of ornament polishing powder, concentrate in process (2) and catch up with nitre, its process is: chloroazotic acid is leached gained solution and move in 500L titanium reactor, stir at 150-200 DEG C and catch up with nitre, catch up with nitre time controling in 12h-24h, in process, repeatedly add the effusion of 5L hydrochloric acid in order to nitrate ion, with nitrogen oxide gas Test paper test result for judging criterion, if nitrogen oxide gas Test paper is unchanged, stops adding hydrochloric acid, obtain required solution.Further catch up with nitre temperature to be 180 DEG C, catch up with the nitre time to be 17h.
Wherein reclaim the method for Precious Metals-Gold, platinum and palladium in processing of ornament polishing powder, in process (1), incineration temperature preferably 850 DEG C.
Wherein reclaim the method for Precious Metals-Gold, platinum and palladium in processing of ornament polishing powder, the oxygenant in process (2) is the one in hydrogen peroxide, clorox, and be preferably clorox, add-on is preferably 8Kg.
Wherein reclaim the method for Precious Metals-Gold, platinum and palladium in processing of ornament polishing powder, the ammonium salt in process (2) is ammonium chloride, and the time of repose in process (2) is preferably 8h.
Wherein reclaim the method for Precious Metals-Gold, platinum and palladium in processing of ornament polishing powder, in weak reductant be one in S-WAT, oxalic acid, ethanol, formic acid, be preferably S-WAT.
Reclaim the method for Precious Metals-Gold, platinum and palladium in another processing of ornament polishing powder, the gold in process (3) is separated time of repose and is preferably 9.5h.
Reclaim the method for Precious Metals-Gold, platinum and palladium in processing of ornament polishing powder, the temperature hold-time in process (4) is preferably 80 DEG C, and pass into amount of oxygen and be preferably 10L, time of repose is preferably 8h.
Present invention employs the method for hydrometallurgic recovery, first polishing powder is at high temperature burned the organism of removing surface adhesion, to expose precious metal fine particle, the polishing powder leaching precious metal after then burning with aqua regia dissolution, the more each precious metal of substep separating-purifying.In the present invention's relevant processing of ornament polishing powder, method for recovering precious metals is easy and simple to handle, and cost is low, fast and effeciently can reclaim precious metal, improves precious metal turnaround speed.
The present embodiment might not be most preferred embodiment of the present invention, as long as other summary of the invention are all the contents belonging to application claims protection in content of the present invention.
Claims (4)
1. reclaim the method for Precious Metals-Gold, platinum and palladium in processing of ornament polishing powder, process is:
(1) burning process: get processing of ornament polishing powder 60kg, use Stainless Steel Disc splendid attire, sabot thickness is no more than 5cm, Stainless Steel Disc is placed in intermediate frequency furnace, burn in 800-900 DEG C, need in burning process to stir to make burning abundant with shovel, metal particle is exposed to the greatest extent to guarantee that the organism of powder particle surface burns, burn the polishing powder thoroughly and should be silver gray, if outward appearance is black, burning not thorough, for not affecting follow-up leaching yield, should continue to burn, until polishing powder is silver gray after burning, obtain polishing powder a;
(2) platinum is separated: the polishing powder burned leaches through chloroazotic acid, the concentrated solution b catching up with nitre to obtain containing Precious Metals-Gold, platinum and palladium, after solution b is cooled, oxygenant 5-10kg is added under stirring, add ammonium salt afterwards with platinum precipitation, stir and occur yellow mercury oxide, until stop when producing without yellow mercury oxide adding ammonium salt, filter after leaving standstill 2-10h, obtain platinum yellow and ammonium chloroplatinate, platinum yellow burns and obtains platina, obtains solution c simultaneously;
(3) gold is separated: stir in solution c and add weak reductant reduction gold, occur that trickle bronze is separated out, to producing without precipitation, then leave standstill 8-10 hour, filter and obtain cake of gold, obtain solution d simultaneously,
(4) tail washings palladium is separated: heat solution d, temperature remains between 30-100 DEG C, then passes into oxygen 5-15L, adds ammonium chloride afterwards, until when solution has bubble to occur, stop adding ammonium chloride, then stir 1h, stop heating and stir, after leaving standstill 8-10h again, filter to obtain filter residue
(5) precious metal refinery is purified: the cake of gold in the platina in process (2), process (3), the filter residue in process (4) are carried out Refining respectively, namely obtains noble metal platinum, gold and palladium.
2. reclaim the method for Precious Metals-Gold, platinum and palladium in processing of ornament polishing powder according to claim 1, it is characterized in that: the oxygenant in process (2) is the one in hydrogen peroxide, clorox.
3. reclaim the method for Precious Metals-Gold, platinum and palladium in processing of ornament polishing powder according to claim 1, it is characterized in that: the ammonium salt in process (2) is ammonium chloride.
4. reclaim the method for Precious Metals-Gold, platinum and palladium in processing of ornament polishing powder according to claim 1, the weak reductant that it is characterized in that in process (3) is the one in S-WAT, oxalic acid, ethanol, formic acid.
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| CN201510915652.2A CN105385854A (en) | 2015-12-11 | 2015-12-11 | Method for recycling precious metal including gold, platinum and palladium in jewelry processing polishing powder |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108929953A (en) * | 2018-08-15 | 2018-12-04 | 大冶有色金属有限责任公司 | A kind of platinum fining process |
| CN109517998A (en) * | 2018-11-24 | 2019-03-26 | 深圳市金正龙科技有限公司 | Golden recovery process in solid waste |
| CN109856006A (en) * | 2018-12-26 | 2019-06-07 | 励福(江门)环保科技股份有限公司 | A kind of method of multiple element content in efficient detection karat gold |
| CN114134336A (en) * | 2021-12-03 | 2022-03-04 | 北京工业大学 | Low-cost reducing agent for selective precipitation of noble metal ions |
| CN114807624A (en) * | 2022-04-07 | 2022-07-29 | 北京电子科技职业学院 | Preparation device and method of antioxidant wear-resistant precious metal jewelry |
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| CN101618457A (en) * | 2008-07-02 | 2010-01-06 | 深圳市众恒隆实业有限公司 | Method for recovering low-content noble metal from jewelry processing polishing powder |
| CN101748283A (en) * | 2008-12-01 | 2010-06-23 | 中山市紫方环保技术有限公司 | Method and equipment for recovering gold from gold jewelry polishing powder |
| CN101942568A (en) * | 2010-10-28 | 2011-01-12 | 佛山市邦普镍钴技术有限公司 | Method for recovering noble metal from waste computer and fittings thereof |
| CN102277497A (en) * | 2011-08-05 | 2011-12-14 | 武汉格林美资源循环有限公司 | Method of reclaiming gold, palladium, platinum and silver from waste circuit board |
| CN105132690A (en) * | 2015-09-20 | 2015-12-09 | 成都育芽科技有限公司 | Method for extracting gold, silver, platinum and palladium from electronic waste |
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2015
- 2015-12-11 CN CN201510915652.2A patent/CN105385854A/en active Pending
Patent Citations (5)
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| CN101618457A (en) * | 2008-07-02 | 2010-01-06 | 深圳市众恒隆实业有限公司 | Method for recovering low-content noble metal from jewelry processing polishing powder |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108929953A (en) * | 2018-08-15 | 2018-12-04 | 大冶有色金属有限责任公司 | A kind of platinum fining process |
| CN109517998A (en) * | 2018-11-24 | 2019-03-26 | 深圳市金正龙科技有限公司 | Golden recovery process in solid waste |
| CN109856006A (en) * | 2018-12-26 | 2019-06-07 | 励福(江门)环保科技股份有限公司 | A kind of method of multiple element content in efficient detection karat gold |
| CN114134336A (en) * | 2021-12-03 | 2022-03-04 | 北京工业大学 | Low-cost reducing agent for selective precipitation of noble metal ions |
| WO2023097923A1 (en) * | 2021-12-03 | 2023-06-08 | 北京工业大学 | Low-cost reducing agent for selective precipitation of noble metal ions |
| CN114807624A (en) * | 2022-04-07 | 2022-07-29 | 北京电子科技职业学院 | Preparation device and method of antioxidant wear-resistant precious metal jewelry |
| CN114807624B (en) * | 2022-04-07 | 2023-10-13 | 北京电子科技职业学院 | Preparation device and method of antioxidant wear-resistant precious metal jewelry |
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