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Method for comprehensively treating copper nickel scrap

A comprehensive treatment, copper-nickel technology, applied in the preparation of copper sulfate, nickel sulfate, nickel compounds, etc., can solve the problems affecting the smooth progress of copper electrolysis process, high-temperature melting of copper-nickel alloy, and undesired economic benefits, and achieve good economic benefits. , The effect of less impurity removal auxiliary materials and low energy consumption

Inactive Publication Date: 2019-11-29
广西银亿新材料有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are many problems in this method, the first is that the copper-nickel alloy needs to be melted at high temperature, and the energy consumption is high; the second is that the nickel content in the anode plate produced is too high, which affects the smooth progress of the copper electrolysis process; Impurities such as copper and iron need to be removed before accumulation, and the process is long
For the treatment of small batches of copper-nickel scrap, the economic benefit of this method is not advisable in the case of loss of scale effect

Method used

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  • Method for comprehensively treating copper nickel scrap

Examples

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Effect test

Embodiment 1

[0025] (1) Mix 50g of copper-nickel skin waste with water at a mass ratio of 1:9, add 121g of sulfuric acid to obtain a mixture, heat the mixture to 80°C, and add 174g of hydrogen peroxide while stirring. The hydrogen peroxide addition time is 30min, and react under normal pressure. The waste copper-nickel skin is dissolved into a mixed solution containing copper and nickel. The dissolution rate of copper is 96.3%, and the dissolution rate of nickel is 98.6%.

[0026](2) Take 500 mL of the above copper-nickel mixed solution, add 126 g of copper-nickel skin waste, heat the copper-nickel-containing mixed solution and copper-nickel skin waste to 80 ° C, add 107.25 g of hydrogen peroxide while stirring, and add the hydrogen peroxide for 45 minutes. After the addition of hydrogen peroxide was completed, the reaction was continued for another 3 hours to obtain nickel sulfate solution and copper-rich metal slag. The copper concentration in the nickel sulfate solution is 0.34g / L, the...

Embodiment 2

[0033] (1) Mix 50g of copper-nickel skin waste with water at a mass ratio of 1:11, add 91g of sulfuric acid to obtain a mixture, heat the mixture to 120°C, and feed oxygen while stirring. The oxygen output pressure is 1.0MPa, and the reaction time is 3h . The waste copper-nickel skin is dissolved into a mixed solution containing copper and nickel. The dissolution rate of copper is 98.5%, and the dissolution rate of nickel is 98.8%.

[0034] (2) Take 500 mL of the above copper-nickel mixed solution, add 96 g of copper-nickel skin waste, heat the copper-nickel mixed solution and copper-nickel skin waste to 80 ° C, add 87.5 g of hydrogen peroxide while stirring, and add hydrogen peroxide for 45 minutes. After the addition of hydrogen peroxide was completed, the reaction was continued for another 3 hours to obtain nickel sulfate solution and copper-rich metal slag. The copper concentration in the nickel sulfate solution is 0.14g / L, the nickel concentration is 91.36g / L, and the p...

Embodiment 3

[0041] (1) Mix 50g of copper-nickel skin waste with water at a mass ratio of 1:10, add 91g of sulfuric acid to obtain a mixture, heat the mixture to 60°C, and add 154g of hydrogen peroxide while stirring. The hydrogen peroxide addition time is 30min, and react under normal pressure. The copper-nickel skin waste was dissolved into 640mL of copper-nickel mixed solution. The dissolution rate of copper is 95.1%, and the dissolution rate of nickel is 92.4%.

[0042] (2) Take 500 mL of the above-mentioned copper-nickel mixed solution, add 113 g of copper-nickel skin waste, heat the copper-nickel-containing mixed solution and copper-nickel skin waste to 60 ° C, add 98.75 g of hydrogen peroxide while stirring, and add the hydrogen peroxide for 45 minutes. After the addition of hydrogen peroxide was completed, the reaction was continued for another 3 hours to obtain nickel sulfate solution and copper-rich metal slag. The copper concentration in the nickel sulfate solution is 0.14g / L, ...

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Abstract

The invention provides a method for comprehensively treating copper-nickel scrap, and the method comprises the following steps: sequentially mixing the copper-nickel scrap with water and sulfuric acid, heating, stirring and adding an oxidant to obtain a mixed solution containing copper and nickel; adding the copper-nickel scrap and an oxidant into the mixed solution containing copper and nickel toobtain a nickel sulfate solution and copper-rich metal slag; adjusting the pH value of the nickel sulfate solution, and performing solvent extraction to obtain a battery-grade product; oxidizing anddissolving the copper-rich metal slag with an acid to obtain a high copper and low nickel mixed solution; evaporating and concentrating the high copper and low nickel mixed solution, crystallizing toseparate out copper sulfate crystals and crystallization mother liquor; reacting the crystallization mother liquor with the copper-nickel scrap; and finally obtaining copper sulfate crystals and a nickel sulfate solution from the copper-nickel scrap. Each index of the copper sulfate crystal product obtained by the method meets the standard level. The method has the advantages of short process flow, low energy consumption, simple industrialization, less impurity removal auxiliary materials and good economic benefits for treating the copper-nickel scrap.

Description

technical field [0001] The invention belongs to the technical field of chemical metallurgy, and in particular relates to a method for comprehensively treating copper-nickel skin waste. Background technique [0002] Nickel-copper alloy has good tensile strength and yield strength properties, high HBW hardness value, high corrosion resistance, good wear resistance, easy molding, non-magnetic, good processing and welding performance, so it is widely used It is used as corrosion-resistant structural parts in shipbuilding, petroleum, chemical industry, construction, electric power, precision instruments, medical equipment, musical instrument production and other fields. Some copper-nickel alloys (white copper) also have special electrical properties, which can be used to make resistance elements, thermocouple materials and compensation wires. Non-industrial cupronickel is mainly used to make decorative handicrafts. When the devices used in these copper-nickel alloys are scrappe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G3/10C01G53/10
CPCC01G3/10C01G53/003C01G53/10
Inventor 杨俊韦贵景何美莲邓晓玲
Owner 广西银亿新材料有限公司
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