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Method for recycling copper and nickel by treating copper and nickel plating sludge through rotational flow electrolysis

A swirl electrolysis and copper recovery technology, applied in the electrolysis process, electrolysis components, electrodes, etc., can solve the problems of cumbersome, complex process, low purity of copper and nickel products, and achieve less reagent consumption, short process flow, and avoid physical problems. health damage effect

Active Publication Date: 2017-11-24
俞振元
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the process of electrolytic refining of copper in this method, in order to prevent the electrolysis of nickel, it is necessary to supplement Cu intermittently. 2+ , so that the electrolyte Cu 2+ The ion concentration is maintained at 20g / L ~ 80g / L, and the Cu in the electrolyte must be removed before electrodeposition of nickel 2+ removed, so the process is more complicated and cumbersome, and the purity of the copper and nickel products finally obtained is not high

Method used

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  • Method for recycling copper and nickel by treating copper and nickel plating sludge through rotational flow electrolysis

Examples

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Effect test

Embodiment 1

[0032] The method that utilizes cyclone electrolytic treatment copper-nickel sludge of the present embodiment to reclaim copper and nickel comprises the following operations:

[0033] For dissolution and leaching, add copper-plated nickel sludge and water into the dissolution tank at a volume ratio of 1:3 for mixing and slurrying, then slowly add 98% concentrated sulfuric acid dropwise, stir and dissolve at a speed of 500r / min, and at the same time use a flow rate of 0.3 m 3 Blow in oxygen-enriched air per hour, react for 2.5 hours at a temperature of 50°C and a pressure of 0.6 MPa, and control the pH of the reaction end point to 1.5. After the reaction, transfer the obtained leaching slurry into a plate and frame filter press for separation by filtration Obtain leachate and filter residue A1. After pressure filtration, dry the filter residue A1 with compressed air to reduce the water content of the filter residue A1 as much as possible. In order to improve the recovery rate...

Embodiment 2

[0050] The method that utilizes cyclone electrolytic treatment copper-nickel sludge of the present embodiment to reclaim copper and nickel comprises the following operations:

[0051] For dissolution and leaching, add copper-plated nickel sludge and water into the dissolution tank at a volume ratio of 1:4 for mixing and slurrying, then slowly add 98% concentrated sulfuric acid dropwise, stir and dissolve at a speed of 700r / min, and at the same time use a flow rate of 0.6 m 3Blow in oxygen-enriched air per hour, react for 3.5 hours at a temperature of 43°C and a pressure of 0.4 MPa, and control the pH of the reaction end point to 1.0. After the reaction, transfer the obtained leaching slurry into a plate and frame filter press for separation by filtration Obtain leachate and filter residue A2. After press filtration, dry the filter residue A2 with compressed air to reduce the water content of the filter residue A2 as much as possible. In order to improve the recovery rate of ...

Embodiment 3

[0059] The method that utilizes cyclone electrolytic treatment copper-nickel sludge of the present embodiment to reclaim copper and nickel comprises the following operations:

[0060] For dissolution and leaching, add copper-plated nickel sludge and water into the dissolution tank at a volume ratio of 1:4 for mixing and slurrying, then slowly add 98% concentrated sulfuric acid dropwise, stir and dissolve at a speed of 600r / min, and at the same time use a flow rate of 0.5 m 3 Blow in oxygen-enriched air per hour, react for 3.0 hours at a temperature of 45°C and a pressure of 0.5 MPa, and control the pH of the reaction end point to 1.0. After the reaction, transfer the obtained leaching slurry into a plate and frame filter press for separation by filtration Obtain leachate and filter residue A3. After press filtration, dry the filter residue A3 with compressed air to reduce the water content of the filter residue A3 as much as possible. In order to improve the recovery rate of...

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Abstract

The invention relates to the technical field of recycling of scrap metal, in particular to a method for recycling copper and nickel by treating copper and nickel plating sludge through rotational flow electrolysis. The method comprises the following steps: taking the copper and nickel plating sludge as a raw material, adding sulfuric acid in the copper and nickel plating sludge for leaching, adding a copper extracting agent in leachate obtained by filter pressing for extracting to obtain a copper-containing organic phase and raffinate, carrying out copper reextraction on the copper-containing organic phase to remove oil, and then carrying out copper electrodeposition by a rotational flow electrolysis device to obtain copper with the purity greater than 99.95% on a cathode; carrying out complexing on the raffinate to remove iron from the raffinate, then carrying out continuous saponification and counter-current extraction on the raffinate, removing oil from the raffinate, and then carrying out nickel electrodeposition by the rotational flow electrolysis device to obtain nickel with the purity greater than 99.95% on the cathode. The method for recycling copper and nickel by treating the copper and nickel plating sludge through rotational flow electrolysis is efficient, reliable, clean and pollution-free; a technological process is simple; copper and nickel recycling rate is high; and regenerated copper and nickel products are high in purity.

Description

technical field [0001] The invention relates to the technical field of recycling metal waste, in particular to a method for recovering copper and nickel from copper-nickel sludge treated with cyclone electrolysis. Background technique [0002] my country is the world's largest copper consumer, and its annual copper consumption accounts for about 21% of the world's total consumption. It is impossible to maintain 21% consumption with 5% resources, and the realistic and feasible way to alleviate this phenomenon is to actively use scrap copper resources to realize the sustainable development of copper. [0003] As an important material for national economy and national defense construction, nickel is also a supporting raw material for improving new technologies and new materials. Its application scope is expanding day by day, and its demand is also increasing year by year. China's nickel supply consists of two parts, one part is the supply of newly produced nickel concentrate, w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B15/00C22B23/00C25C1/12C25C1/08C25C7/02C22B3/30C22B3/38
CPCC22B7/007C22B15/0071C22B15/0084C22B23/043C22B23/0461C25C1/08C25C1/12C25C7/02C22B3/30C22B3/3844Y02P10/20
Inventor 俞振元
Owner 俞振元
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