CN102399992A - Method for recovering valuable metals from waste plastic plating layer containing copper and nickel - Google Patents
Method for recovering valuable metals from waste plastic plating layer containing copper and nickel Download PDFInfo
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- CN102399992A CN102399992A CN2011104231872A CN201110423187A CN102399992A CN 102399992 A CN102399992 A CN 102399992A CN 2011104231872 A CN2011104231872 A CN 2011104231872A CN 201110423187 A CN201110423187 A CN 201110423187A CN 102399992 A CN102399992 A CN 102399992A
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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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- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/62—Plastics recycling; Rubber recycling
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Abstract
The invention relates to a method for recovering valuable metals from a waste plastic plating layer containing copper and nickel. The method comprises the following steps of: (1) crushing the waste plastic plating layer containing the copper and the nickel into scraps; (2) leaching the scraps with stirring by using an acid solution; and (3) after leaching, standing until the leached dregs are precipitated, removing plastics floated on leachate, and filtering the leached dregs and the leachate for separation, wherein after the waste plastic plating layer containing the copper and the nickel is treated, the nickel is contained in the leachate, and the copper is contained in the leached dregs. Copper and nickel intermediate products obtained by the method are high in recovery rates, a subsequent treatment process is flexible and simple, and the method is novel and high in practicality.
Description
Technical field
The present invention relates to a kind of recovery and treatment method of valuable metal, particularly a kind of method that from cupric nickel plastic waste coating, reclaims valuable metal.
Background technology
Copper and mickel is widely used as the overlay coating of plastic component, has effect wear-resisting, corrosion-resistant, attractive in appearance.Along with the usage quantity of metal plating constantly increases, from the plastic waste coating that contains copper and mickel, reclaim metal and not only have the characteristics of waste and old resources effective utilization, also be the inexorable trend of environment protection.
Nickel is the most frequently used a kind of coating of plastic electroplating, because the requirement of plating process generally is after plating layer of copper earlier on the plastic substrate, utilizes the method for plating or electroless plating on copper coating, to carry out nickel plating again; Therefore, the copper nickel composite deposite becomes a kind of typical plating process; For recycling copper and mickel from this type of coating, need to solve metal plating and separate with plastic substrate and the isolating problem of copper nickel.
One Chinese patent application CN101476041 disclose a kind of from the waste electroplating plastics method of recovering copper, nickel and reprocessed plastic(s); Its principal feature is: with the waste electroplating plastics with crusher in crushing after; Adopt nitric acid with dissolving metals such as surperficial copper, nickel, get clear plastic behind the insolubles filtration washing; Cupric, nickel solution get the high purity copper sponge behind iron replacement; Surplus liquid behind the foreign ions such as P204 extraction copper removal, iron, gets pure nickel nitrate solution, production metal nickel plate after electrodeposition is handled through the yellow modumite method deironing; The shortcoming of this method is that nitric acid causticity is strong, and price is high, separates in order to realize copper nickel; The a large amount of iron powders that added almost total overall reaction get in the nickel sulfate solution; Subsequent P 204 deferrization process acid and alkali consumptions are big, and after the deironing, how iron vitriol dreg of yellow sodium is not handled is considered.
Application number is 201010301214 one Chinese patent application; The method of metal and plastics in the plastic waste that a kind of recovery contains metal plating is disclosed; Plastic waste is joined in the excessive hydrochloric acid soln; Charge into industrial oxygen simultaneously, hydrochloric acid and metal plating are fully reacted, separate obtaining taking off plating plastics and mixing solutions; In mixing solutions, add excessive iron filings, the hybrid metal and the mixing solutions that obtain copper, nickel, iron are filtered in fully reaction; Iron and nickel are sucked out from the hybrid metal of copper, nickel, iron with magnet, obtain iron nickel hybrid metal and metallic copper respectively; This method is made oxygenant with oxygen, and hydrochloric acid system leaches metal plating, but the displacement of iron powder selectivity is still adopted in the separation of copper and mickel in the leach liquor; Feasibility degree with iron powder reducing displacement nickel does not have specific embodiment to embody in patent, a difficult problem that still exists a large amount of iron to remove in the mixed solution.
Application number is 200610086201 one Chinese patent application; A kind of electroplating method that takes off of plastic waste metal plating is disclosed; In the raw material salt acid solution, put into the plastic waste that mainly contains metallic copper, nickel, chromium coating; Charge into air simultaneously, hydrochloric acid and metal plating are fully reacted, generate and contain taking off plating liquor and taking off the plating plastics of cupric chloride, nickelous chloride and chromium chloride; To take off plating liquor and take off the plating plastics and separate, will take off the plating plastics and behind washing and drying, reclaim; Taking off after the separation adds sulfuric acid in the plating liquor; Sulfuric acid generates copper sulfate, single nickel salt and hydrochloric acid with the metal chlorate reaction of taking off in the plating liquor; With reacted mixed solution crystallisation by cooling; Obtain copper sulfate, single nickel salt crystallization, after filtering separation, obtain copper sulfate, single nickel salt product and contain little metal ionic hydrochloric acid soln again; This method adopts drum oxygen, chlorination system to leach, and adds sulfuric acid afterwards, the mixing salt of output copper sulfate and single nickel salt under high acidity and cooling conditions, and the separation problem of copper and nickel is not resolved, and in follow-up treatment process, still will face this problem.
Summary of the invention
Problem to the existence in recycling of existing cupric nickel plastic waste coating; The present invention provides the method that from a kind of cupric nickel plastic waste coating, reclaims valuable metal; Adopting industry to go up inexpensive sulphuric acid soln leaches; In the isolating while of realizing metal plating and plastic substrate, utilize copper, nickel different with the avidity of sulphur, make copper and mickel reach isolating effect.
Method of the present invention is carried out according to the following steps:
1, analyzes the composition of cupric nickel plastic waste coating, cupric nickel plastic waste coating is broken into the chip of granularity≤5mm;
2, under agitation condition, leach chip with acid solution, the consumption of acid solution is 3 ~ 10m
3/ ton chip, extraction temperature is 60 ~ 95 ℃, extraction time is 0.5 ~ 8h; Described acid solution is by the sulfuric acid of mass concentration 95%, etching reagent and water preparation, and wherein the vitriolic consumption is 1.5 ~ 3 times of nickel quality in the chip; Etching reagent is sulphur, Sulfothiorine and/or S-WAT; When in the etching reagent sulphur being arranged; The consumption of sulphur is 0.2 ~ 0.6 times of copper mass in the chip, and when in the etching reagent Sulfothiorine being arranged, the consumption of Sulfothiorine is 1 ~ 3 times of copper mass in the chip; When in the etching reagent S-WAT being arranged, the consumption of S-WAT is 2 ~ 4 times of copper mass in the chip;
3, leaching is left standstill to the leached mud sedimentation after accomplishing, and removes buoyant plastics on the leach liquor, and with leached mud and leach liquor filtering separation, leach liquor is a nickel sulfate solution, and leached mud is the solid slag that contains the sulfide of copper.
Leach liquor in the aforesaid method is a nickel sulfate solution, is used for the processing of nickel product.
Leached mud in the aforesaid method is the solid slag that contains the sulfide of copper, is used to reclaim copper.
The mass content of copper is 30 ~ 70% in the above-mentioned cupric nickel plastic waste coating, and the mass content of nickel is 25 ~ 66%, and surplus is plastics.
The leaching yield of nickel is 96 ~ 99% in the aforesaid method, the mass content≤0.01g/L of copper in the leach liquor.
In the aforesaid method in the leached mud mass content of nickel be 0.26 ~ 3.3%.
Isolated plastics reclaim separately in the aforesaid method.
Method of the present invention is simple to operate, and the agents useful for same cost is low, and leach through a step and can realize separating of coating and plastic substrate, and the separation that realizes copper, nickel element in the coating, be convenient to subsequent technique and obtain copper products and nickel product separately.
Method of the present invention has avoided using strong nitric acid and the hydrochloric acid of corrodibility to make leaching agent, and is to use industry to go up inexpensive sulfuric acid, and equipment anticorrosion is prone to solve; Aspect the separation of copper, nickel, overcome in the past and adopted iron replacement in the traditional technology, set up the difficult problem of independent step deironing afterwards; Copper, nickel exist with sulfide slag form with copper after separating, can be as the direct marketing of higher-grade copper ore concentrates, or adopt oxygen to press to leach, hydrogen reduction makes copper powder, or acid is dissolved galvanic deposit and is got cathode copper behind the desulfurization with roasting technique; Nickel exists with purified nickel sulfate solution form, adds sulfuric acid and adopts the peracid evaporative crystallization can get nickel sulfate hexahydrate crystal, and crystalline mother solution returns leaching, or directly galvanic deposit obtains cathode nickel; The copper, the nickel intermediates recovery that obtain through present method are high, and subsequent treatment process is flexible, and technology is simple, and method is novel, and is practical.
Description of drawings
Fig. 1 is the schematic flow sheet that from cupric nickel plastic waste coating, reclaims the method for valuable metal of the present invention;
Fig. 2 is the XRD figure of embodiment of the invention cupric nickel plastic waste coating;
Fig. 3 is the leached mud and the standard card XRD figure spectrum comparison diagram of the embodiment of the invention 1, and figure is cuprous sulfide standard card at the middle and upper levels, and lower floor is a leached mud;
Fig. 4 is the leached mud and the standard substance XRD figure spectrum comparison diagram of the embodiment of the invention 4, and figure is the standard card of S at the middle and upper levels, and the middle level is the standard card of CuS, and lower floor is a leached mud.
Embodiment
The sulfuric acid of the mass concentration 95% that adopts in the embodiment of the invention is general industry sulfuric acid.
The sulphur that adopts in the embodiment of the invention, Sulfothiorine and S-WAT are the general industry product.
Cupric nickel plastic waste coating in the embodiment of the invention is that the plastic waste by the cupric nickel coatings forms after peeling off coating.
Mass content≤10% of plastics in the cupric nickel plastic waste coating in the embodiment of the invention.
When the etching reagent in the embodiment of the invention is made up of sulphur and Sulfothiorine; Or when forming by Sulfothiorine and S-WAT; Or when forming by sulphur and S-WAT; Or when being made up of sulphur, Sulfothiorine and S-WAT, its usage ratio is that 0.2 ~ 0.6 times of copper mass, the consumption of Sulfothiorine are that 1 ~ 3 times of copper mass, the consumption of S-WAT are 2 ~ 4 times of preparations of copper mass in the chip in the chip in the chip by the consumption of sulphur all.
Leave standstill to the leached mud sedimentation after leaching completion in the embodiment of the invention; Remove buoyant plastics on the leach liquor; With the mode of leached mud and leach liquor filtering separation be: buoyant plastics on the leach liquor are pulled out with screen cloth; With leached mud and leach liquor filtering separation, perhaps the part that has plastics in the leach liquor is toppled over out the filtering separation plastics, with leach liquor remainder and leached mud filtering separation.
Embodiment 1
The mass content of copper is 50.5% in the cupric nickel plastic waste coating that adopts, and the mass content of nickel is 43.1%, and the mass content of plastics is 6.4%, and the XRD analysis result is as shown in Figure 2;
With cupric nickel plastic waste coating through Mechanical Crushing and sieve and process the chip of granularity≤5mm;
Chip is placed leaching vat, add acid solution and under agitation condition, leach, extraction temperature is 90 ℃, and extraction time is 2h;
Described acid solution is by sulfuric acid, etching reagent and the water preparation of mass concentration 95%, and the volume of acid solution is 3m
3/ ton chip;
The vitriolic consumption is 1.5 times of nickel quality in the chip;
Etching reagent is a sulphur, and the consumption of sulphur is 0.2 times of copper mass in the chip;
Leave standstill after leach accomplishing to leached mud and precipitate; Buoyant on the leach liquor is pulled out with the screen cloth plastics, with leached mud and leach liquor filtering separation;
Leach liquor becomes nickel sulfate solution, is used for the processing of nickel product; Leached mud is the solid slag that contains the sulfide of copper, and the XRD analysis result is as shown in Figure 3, is used to reclaim copper;
The leaching yield of nickel is 96%, the mass content≤0.01g/L of copper in the leach liquor;
The mass content of nickel is 2.8% in the leached mud.
Embodiment 2
The mass content of copper is 62.5% in the cupric nickel plastic waste coating that adopts, and the mass content of nickel is 31.5%, the mass content 6% of plastics;
With cupric nickel plastic waste coating through Mechanical Crushing and sieve and process the chip of granularity≤5mm;
Chip is placed leaching vat, add acid solution and under agitation condition, leach, extraction temperature is 95 ℃, and extraction time is 0.5h;
Described acid solution is by sulfuric acid, etching reagent and the water preparation of mass concentration 95%, and the volume of acid solution is 3m
3/ ton chip;
The vitriolic consumption is 2 times of nickel quality in the chip;
Etching reagent is a sulphur, and the consumption of sulphur is 0.2 times of copper mass in the chip;
Leave standstill after leach accomplishing to leached mud and precipitate; The part that has plastics in the leach liquor is toppled over out the filtering separation plastics, with leach liquor remainder and leached mud filtering separation;
The isolated leached mud of two portions is merged,, be used for the processing of nickel product as nickel sulfate solution; Leached mud is the solid slag that contains the sulfide of copper, is used to reclaim copper;
The leaching yield of nickel is 97%, the mass content≤0.01g/L of copper in the leach liquor;
The mass content of nickel is 2.1% in the leached mud.
Embodiment 3
The mass content of copper is 30.6% in the cupric nickel plastic waste coating that adopts, and the mass content of nickel is 65.7%, the mass content 3.7% of plastics;
With cupric nickel plastic waste coating through Mechanical Crushing and sieve and process the chip of granularity≤5mm;
Chip is placed leaching vat, add acid solution and under agitation condition, leach, extraction temperature is 60 ℃, and extraction time is 8h;
Described acid solution is by sulfuric acid, etching reagent and the water preparation of mass concentration 95%, and the volume of acid solution is 8m
3/ ton chip;
The vitriolic consumption is 2 times of nickel quality in the chip;
Etching reagent is sulphur and S-WAT, and the consumption of sulphur is 0.2 times of copper mass in the chip, and the consumption of S-WAT is 2 times of copper mass in the chip;
Leave standstill after leach accomplishing to leached mud and precipitate; Buoyant on the leach liquor is pulled out with the screen cloth plastics, with leached mud and leach liquor filtering separation;
Leach liquor is used for the processing of nickel product as nickel sulfate solution; Leached mud is the solid slag that contains the sulfide of copper, is used to reclaim copper;
The leaching yield of nickel is 98%, the mass content≤0.01g/L of copper in the leach liquor;
The mass content of nickel is 3.3% in the leached mud.
Embodiment 4
The mass content of copper is 68.8% in the cupric nickel plastic waste coating that adopts, and the mass content of nickel is 25.5%, the mass content 5.7% of plastics;
With cupric nickel plastic waste coating through Mechanical Crushing and sieve and process the chip of granularity≤5mm;
Chip is placed leaching vat, add acid solution and under agitation condition, leach, extraction temperature is 80 ℃, and extraction time is 4h;
Described acid solution is by sulfuric acid, etching reagent and the water preparation of mass concentration 95%, and the volume of acid solution is 5m
3/ ton chip;
The vitriolic consumption is 2.5 times of nickel quality in the chip;
Etching reagent is sulphur and Sulfothiorine, and the consumption of sulphur is 0.4 times of copper mass in the chip, and the consumption of Sulfothiorine is 1 times of copper mass in the chip;
Leave standstill after leach accomplishing to leached mud and precipitate; Buoyant on the leach liquor is pulled out with the screen cloth plastics, with leached mud and leach liquor filtering separation;
The isolated leached mud of two portions is merged, become nickel sulfate solution, be used for the processing of nickel product; Leached mud is the solid slag that contains the sulfide of copper, is used to reclaim copper;
The leaching yield of nickel is 99%, the mass content≤0.01g/L of copper in the leach liquor;
The mass content of nickel is 0.26% in the leached mud.
Embodiment 5
The cupric nickel plastic waste coating that adopts is with embodiment 1;
With cupric nickel plastic waste coating through Mechanical Crushing and sieve and process the chip of granularity≤5mm;
Chip is placed leaching vat, add acid solution and under agitation condition, leach, extraction temperature is 90 ℃, and extraction time is 3h;
Described acid solution is by sulfuric acid, etching reagent and the water preparation of mass concentration 95%, and the volume of acid solution is 10m
3/ ton chip;
The vitriolic consumption is 3 times of nickel quality in the chip;
Etching reagent is sulphur, Sulfothiorine and S-WAT, and the consumption of sulphur is 0.6 times of copper mass in the chip, and the consumption of Sulfothiorine is 3 times of copper mass in the chip, and the consumption of S-WAT is 2 times of copper mass in the chip;
Leave standstill after leach accomplishing to leached mud and precipitate; Buoyant on the leach liquor is pulled out with the screen cloth plastics, with leached mud and leach liquor filtering separation;
Leach liquor is used for the processing of nickel product as nickel sulfate solution; Leached mud is the solid slag that contains the sulfide of copper, is used to reclaim copper;
The leaching yield of nickel is 99%, the mass content≤0.01g/L of copper in the leach liquor;
The mass content of nickel is 0.66% in the leached mud.
Embodiment 6
The cupric nickel plastic waste coating that adopts is with embodiment 1;
With cupric nickel plastic waste coating through Mechanical Crushing and sieve and process the chip of granularity≤5mm;
Chip is placed leaching vat, add acid solution and under agitation condition, leach, extraction temperature is 90 ℃, and extraction time is 4h;
Described acid solution is by sulfuric acid, etching reagent and the water preparation of mass concentration 95%, and the volume of acid solution is 10m
3/ ton chip;
The vitriolic consumption is 3 times of nickel quality in the chip;
Etching reagent is Sulfothiorine and S-WAT, and the consumption of Sulfothiorine is 2 times of copper mass in the chip, and the consumption of S-WAT is 4 times of copper mass in the chip;
Leave standstill after leach accomplishing to leached mud and precipitate; Buoyant on the leach liquor is pulled out with the screen cloth plastics, with leached mud and leach liquor filtering separation;
Leach liquor is used for the processing of nickel product as nickel sulfate solution; Leached mud is the solid slag that contains the sulfide of copper, is used to reclaim copper;
The leaching yield of nickel is 97%, the mass content≤0.01g/L of copper in the leach liquor;
The mass content of nickel is 1.8% in the leached mud.
Claims (4)
1. method that from cupric nickel plastic waste coating, reclaims valuable metal is characterized in that carrying out according to the following steps:
(1) analyzes the composition of cupric nickel plastic waste coating, cupric nickel plastic waste coating is broken into the chip of granularity≤5mm;
(2) under agitation condition, leach chip with acid solution, the consumption of acid solution is 3 ~ 10m
3/ ton chip, extraction temperature is 60 ~ 95 ℃, extraction time is 0.5 ~ 8h; Described acid solution is by the sulfuric acid of mass concentration 95%, etching reagent and water preparation, and wherein the vitriolic consumption is 1.5 ~ 3 times of nickel quality in the chip; Etching reagent is sulphur, Sulfothiorine and/or S-WAT; When in the etching reagent sulphur being arranged; The consumption of sulphur is 0.2 ~ 0.6 times of copper mass in the chip, and when in the etching reagent Sulfothiorine being arranged, the consumption of Sulfothiorine is 1 ~ 3 times of copper mass in the chip; When in the etching reagent S-WAT being arranged, the consumption of S-WAT is 2 ~ 4 times of copper mass in the chip;
(3) leave standstill to the leached mud deposition after leaching is accomplished, remove buoyant plastics on the leach liquor, with leached mud and leach liquor filtering separation, leach liquor is a nickel sulfate solution, and leached mud is the solid slag that contains the sulfide of copper.
2. a kind of method that from cupric nickel plastic waste coating, reclaims valuable metal according to claim 1; The mass content that it is characterized in that copper in the described cupric nickel plastic waste coating is 30 ~ 70%; The mass content of nickel is 25 ~ 66%, and surplus is plastics, the mass content of plastics≤10%.
3. a kind of method that from cupric nickel plastic waste coating, reclaims valuable metal according to claim 1 is characterized in that the leaching yield of nickel is 96 ~ 99%, the mass content≤0.01g/L of copper in the leach liquor.
4. a kind of method that from cupric nickel plastic waste coating, reclaims valuable metal according to claim 1, the mass content that it is characterized in that nickel in the described leached mud is 0.26 ~ 3.3%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104231872A CN102399992B (en) | 2011-12-16 | 2011-12-16 | Method for recovering valuable metals from waste plastic plating layer containing copper and nickel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104231872A CN102399992B (en) | 2011-12-16 | 2011-12-16 | Method for recovering valuable metals from waste plastic plating layer containing copper and nickel |
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| CN102399992A true CN102399992A (en) | 2012-04-04 |
| CN102399992B CN102399992B (en) | 2013-07-10 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107058741A (en) * | 2017-03-29 | 2017-08-18 | 温州科锐环境资源利用有限公司 | Useless ABS plastic plated item metals recovery processes and its retracting device |
| CN110306062A (en) * | 2019-08-20 | 2019-10-08 | 中国兵器科学研究院宁波分院 | A kind of method that impulse method extracts precious metal in metal coated plastics |
| CN110565359A (en) * | 2019-09-09 | 2019-12-13 | 珠海市安能环保科技有限公司 | recycling method of waste copper and nickel wastewater filter medium |
| CN112095012A (en) * | 2020-09-08 | 2020-12-18 | 江苏荣信环保科技有限公司 | Process for recovering nickel iron from waste acid on metal surface of stainless steel |
| CN112095011A (en) * | 2020-09-08 | 2020-12-18 | 江苏荣信环保科技有限公司 | Recovery process of ferrochrome in waste acid on stainless steel metal surface |
| CN112553478A (en) * | 2020-12-02 | 2021-03-26 | 金川集团镍盐有限公司 | Method for quickly leaching nickel hydroxide cobalt sulfuric acid system |
| CN113337717A (en) * | 2021-06-11 | 2021-09-03 | 南昌航空大学 | Method for separating and recovering valuable metals in electroplating sludge by adopting combined chlorinating agent |
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| JPH09324222A (en) * | 1996-06-03 | 1997-12-16 | Clean Japan Center | Method for recovering metal from plastic adhered with nonferrous metals |
| CN1912154A (en) * | 2006-08-18 | 2007-02-14 | 丁四宜 | Method for decoating on waste plastic metal |
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| JPH09324222A (en) * | 1996-06-03 | 1997-12-16 | Clean Japan Center | Method for recovering metal from plastic adhered with nonferrous metals |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107058741A (en) * | 2017-03-29 | 2017-08-18 | 温州科锐环境资源利用有限公司 | Useless ABS plastic plated item metals recovery processes and its retracting device |
| CN110306062A (en) * | 2019-08-20 | 2019-10-08 | 中国兵器科学研究院宁波分院 | A kind of method that impulse method extracts precious metal in metal coated plastics |
| CN110306062B (en) * | 2019-08-20 | 2021-05-07 | 中国兵器科学研究院宁波分院 | Method for extracting precious metal from metal coating plastic by pulse method |
| CN110565359A (en) * | 2019-09-09 | 2019-12-13 | 珠海市安能环保科技有限公司 | recycling method of waste copper and nickel wastewater filter medium |
| CN112095012A (en) * | 2020-09-08 | 2020-12-18 | 江苏荣信环保科技有限公司 | Process for recovering nickel iron from waste acid on metal surface of stainless steel |
| CN112095011A (en) * | 2020-09-08 | 2020-12-18 | 江苏荣信环保科技有限公司 | Recovery process of ferrochrome in waste acid on stainless steel metal surface |
| CN112553478A (en) * | 2020-12-02 | 2021-03-26 | 金川集团镍盐有限公司 | Method for quickly leaching nickel hydroxide cobalt sulfuric acid system |
| CN113337717A (en) * | 2021-06-11 | 2021-09-03 | 南昌航空大学 | Method for separating and recovering valuable metals in electroplating sludge by adopting combined chlorinating agent |
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|---|---|
| CN102399992B (en) | 2013-07-10 |
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