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Method for recovering copper, cobalt and nickel from copper and nickel slag

A copper-nickel slag and copper recovery technology, applied in the direction of improving process efficiency, can solve the problem of high cost and achieve the effect of high economic value and social benefit

Inactive Publication Date: 2014-05-21
斯莱登(北京)化工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method has strict control over the production conditions, uses a variety of extraction agents, and has a high cost.

Method used

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  • Method for recovering copper, cobalt and nickel from copper and nickel slag
  • Method for recovering copper, cobalt and nickel from copper and nickel slag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] a. Use 100g of ground 80-mesh copper waste slag ore powder to leach soluble matter by step-by-step concentration method. In the first step, water and concentrated acid are added in proportion to the leaching process. The acid concentration of the pulp is 50% and the temperature is 60°C. Under the leaching for 60 minutes; the second step of leaching uses a pulp acid concentration of 15%, with the reflux waste liquid as the leaching solution, the leaching time is 80 minutes, and the leaching temperature is normal temperature, and the mixture is separated from the solid and liquid to obtain the leaching residue I and the leaching solution I ( Cu=151mg / L, Ni=125mg / L, Co=69mg / L);

[0030] b. Oxygen oxidation is passed into 521mL leach solution I, and low-valent iron ions are oxidized into high-valent ions, and an appropriate amount of copper-nickel slag is added to the oxidized acid solution to adjust the pH value to about 3, and high-valent iron is precipitated in the form o...

Embodiment 2

[0036] a. Use 100g of ground 80-mesh copper waste slag slag powder to leach soluble matter using the step-by-step concentration method. In the first step, water and concentrated acid are added in proportion to the pulp acid concentration of 40% and the temperature is 70°C. 80min under leaching; the second step leaching uses a pulp acid concentration of 15%, using the reflux waste liquid as the leaching solution, the leaching time is 80min, the leaching temperature is normal temperature, and the mixture is separated from the solid and liquid to obtain the leaching slag I and the leaching solution I ( Cu=163mg / L, Ni=155mg / L, Co=88mg / L);

[0037]b. Oxygen oxidation is passed into 534mL leachate I, low-priced iron ions are oxidized into high-valent ions, and an appropriate amount of copper-nickel slag is added to the oxidized acid solution to adjust the pH value to about 3, and high-valent iron is precipitated in the form of ferric hydroxide. Separation slag II and separation liqu...

Embodiment 3

[0043] a. Use 100g of ground 80-mesh copper waste slag ore powder to leach soluble matter using the step-by-step concentration method. In the first step, water and concentrated acid are added in proportion to the leaching. The acid concentration of the pulp is 60% and the temperature is 40°C. 50min under leaching; the second step leaching uses ore pulp with an acid concentration of 15%, the reflux waste liquid is used as the leaching solution, the leaching time is 90min, and the leaching temperature is normal temperature, and the mixture is separated into solid and liquid to obtain leaching residue I and leaching solution I ( Cu=146mg / L, Ni=115mg / L, Co=75mg / L);

[0044] b. Oxygen oxidation is passed into 505mL leachate I, low-priced iron ions are oxidized into high-valent ions, and an appropriate amount of copper-nickel slag is added to the oxidized acid solution to adjust the pH value to about 3, and high-valent iron is precipitated in the form of ferric hydroxide. Separation...

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Abstract

The invention discloses a method for recovering copper, cobalt and nickel from copper and nickel slag. The method comprises the following steps: leaching a soluble substance through ore grinding and powder concentration by using an acid, performing solid-liquid separation to obtain a leaching solution I and leaching slag I; oxidizing soluble metals in the leaching slag I, regulating the pH value, precipitating and separating the iron, and performing solid-liquid separation to obtain a separation solution II and separation slag II; continuously adding the copper and nickel slag into the separation solution II, regulating the pH value so as to ensure that soluble silicon is precipitated in a silicate form, and performing solid-liquid separation to obtain a separation solution III and separation slag III; finally, precipitating the copper, cobalt and nickel in the separation solution III by using sodium dimethyl dithiocarbamate and xanthate, and performing solid-liquid separation to obtain separation slag IV, namely the recovery product. According to the reasonable process design, common chemicals and methods are used, the copper, cobalt and nickel are recovered from the copper and nickel slag, the environment can be prevented from being polluted by waste residues, and rare metals such as copper, cobalt and nickel can be effectively recovered. Moreover, the product process parameters are easily controlled, and novel environmental pollution is avoided.

Description

technical field [0001] The invention relates to a method for recovering copper-cobalt-nickel from copper-nickel slag, which belongs to the technical field of resource chemistry and environmental engineering. Background technique [0002] Copper is one of the most widely used non-ferrous metals. It is widely used in various industrial fields because of its good electrical and thermal conductivity, good mechanical properties, and easy alloying properties. In recent years, the production and consumption of copper in China have grown rapidly, and my country has become the second largest copper consumer in the world. Therefore, the utilization of copper is of great significance to my country's industry. Cobalt is a precious non-ferrous metal and an important strategic raw material, but its resources are scarce. Among them, cobalt is mostly distributed in minerals such as sulfides, arsenides and oxides in an associated form, so it is mainly recovered from the by-products of othe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/04C22B3/06C22B3/44C22B15/00C22B23/00
CPCY02P10/20
Inventor 莫红兵段金城刘耀驰
Owner 斯莱登(北京)化工科技有限公司
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