Method of recovering copper and nickel from plastic plated parts

A technology for recycling copper and plated parts, which is applied in the field of metallurgy, can solve the problems of incomplete crystal form, influence on nickel electrowinning, secondary pollution, etc., and achieve the effects of small influence, accelerated metal oxidation, and improved reaction speed

Active Publication Date: 2015-12-30
广西银亿再生资源有限公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] The purpose of the invention of the present invention is to aim at the H existing in the prior art 2 o 2 The dosage is large, the reaction speed is slow, the recovered metal has low purity and incomplete crystal form, and the introduced ammonium ion will affect the electrowinning of nickel, which is easy to cause secondary pollution and other problems. It provides a method for recovering copper and nickel from plastic plating parts. Methods

Method used

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  • Method of recovering copper and nickel from plastic plated parts

Examples

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Effect test

Embodiment 1

[0048] Weigh 1000 kg of the plastic plated parts after crushing and washing, wherein the contents of copper and nickel are 10% and 5% respectively. Add 1.8m into the reaction tank 3 Pure water, then slowly add 400kg of sulfuric acid with a mass concentration of 98%, and 50kg of hydrogen peroxide with a concentration of 20.2%. After 1 hour of reaction, turn on the circulation pump and the microbubble generator to blow in air and then leaching for 12 hours. The injection speed of the microbubble generator is 20m / s. After the reaction is completed, the leachate is filtered to obtain a leachate of 2.0m 3 It contains 49.5g / L copper, 24.7g / L nickel and 78.0g / L sulfuric acid. After the leaching solution is filtered by a precision filter, copper electrowinning is carried out in a cyclone electrolytic cell, and the output of cathode copper is 96.2kg. The anolyte contains 1.2g / L copper, 24.7g / L nickel, and 154.0g / L sulfuric acid; the anolyte is frozen to At -15°C, nickel was precipit...

Embodiment 2

[0050] Weigh 1000 kg of the plastic plated parts after crushing and washing, wherein the contents of copper and nickel are 10% and 5% respectively. Add 1.8m into the reaction tank 3 Pure water, then slowly add 400kg of sulfuric acid with a mass concentration of 98% and 50kg of hydrogen peroxide with a mass concentration of 25.0%, the leaching oxidant is hydrogen peroxide and oxygen, and the industrial pure oxygen is directly connected to the microbubble generator to make the oxygen bubble into the tank in the form of microbubbles Inside, the jet velocity of the microbubble generator is 20m / s. After 1 hour of reaction, turn on the circulation pump and the microbubble generator to blow in oxygen and then leaching for 8 hours. After the reaction is completed, the leachate is filtered to obtain a leachate of 2.0m 3 It contains 50.1g / L copper, 24.88g / L nickel and 76.0g / L sulfuric acid. The leaching solution was filtered by a precision filter and then used a cyclone electrolytic ...

Embodiment 3

[0052] Weigh 1000 kg of the plastic plated parts after crushing and washing, wherein the contents of copper and nickel are 10% and 5% respectively. Add 1.8m into the reaction tank 3 Pure water, then slowly add 400kg of sulfuric acid with a mass concentration of 98%, 50kg of 30.0% hydrogen peroxide, and after 1 hour of reaction, turn on the circulation pump and the microbubble generator to blow in air and then leaching for 12 hours. The injection speed of the microbubble generator is 15m / s. After the reaction is completed, the leachate is filtered to obtain a leachate of 2.0m 3 It contains 49.5g / L copper, 24.7g / L nickel and 78.0g / L sulfuric acid. The leaching solution was filtered by a precision filter and then put into the electrowinning tank for copper electrowinning to produce 93.2kg of cathode copper, 1.7g / L of copper, 24.51g / L of nickel, and 156.0g / L of sulfuric acid in the anolyte; the anolyte was frozen to At -15°C, nickel was precipitated in the form of nickel sulfat...

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Abstract

The invention belongs to the field of metallurgy and relates to a method of recovering copper and nickel from plastic plated parts. The method is mainly characterized in that by means of sulfuric acid leaching and using hydrogen peroxide and air or oxygen as oxidizing agents, a micro-bubble generator is used to blow the air or oxygen into a reactor in a micro-bubble form, leached solution is treated by cyclone electrowinning to produce cathode copper, anode liquor is frozen and crystallized to produce crude nickel sulfate, and the crude nickel sulfate is subjected to the steps such as dissolving, impurity removal by extracting, evaporation concentration, and cooling crystallization to produce high-purity nickel sulfate. The method has the advantages that reaction speed is high, no other impurities are introduced, metal recovery rate is high, solution circulates in a closed loop, no wastewater or waste residue is produced, few auxiliaries are used, energy consumption is low, and low carbon, energy conservation and emission reduction can be achieved.

Description

technical field [0001] The invention belongs to the field of metallurgy and relates to a method for recovering copper and nickel, in particular to a method for recovering copper and nickel from plastic plated parts. Background technique [0002] Plastic is widely used because of its strong plasticity, fine surface and low price. Plastic plated parts refer to plastic products that use the principle of electrolysis to plate a thin layer of other metals or alloys on some metal surfaces. Plastic products are endowed with metal properties after being electroplated with a metal layer. They have the characteristics of light weight, electrical conductivity, surface gloss, and good leveling. They combine the advantages of plastics and metals and are widely used in electronics, automobiles, motorcycles, hardware, Household goods and other industries. [0003] With the periodic scrapping and dismantling of electronics, home appliances, automobiles and other products and the defective...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B15/00C22B23/00
CPCY02P10/20
Inventor 谭笑天
Owner 广西银亿再生资源有限公司
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