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Method for producing electrolytic nickel by leaching and purifying manganese-containing nickel hydroxide

A technology of nickel hydroxide and electrolytic nickel, which is applied in the field of mineral processing, can solve the problems of complex separation and purification process, unsystematic research, and many impurities, and achieve a wide range of mineral resources utilization, simple process path, and high nickel leaching rate Effect

Inactive Publication Date: 2014-09-10
SHAANXI HUAZE NICKEL & COBALT METAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the many and complex impurities in the mineral material, especially the high content of manganese, the separation and purification process in the production process is complicated and inefficient
Therefore, how to use the oxidized laterite nickel ore product with complex chemical composition to transfer nickel into the solution and make full use of limited resources through separation and purification has become the main research goal of scientific and technological personnel. At present, there is no systematic research and mature industrial production at home and abroad.

Method used

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  • Method for producing electrolytic nickel by leaching and purifying manganese-containing nickel hydroxide

Examples

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Embodiment 1

[0026] see figure 1 , the present invention comprises the following steps:

[0027] A. At 40m 3 Add 20m 3 Anolyte, 6t of manganese-containing nickel hydroxide and reducing agent were added and stirred for 30 minutes. Wherein, the reducing agent is sodium sulfite, and the amount of reducing agent added for every 1 ton of manganese-containing nickel hydroxide is 50Kg. Wherein, the anolyte is nickel sulfate solution containing nickel 40g / L, and the acidity is controlled to 45g / L by adding dilute sulfuric acid.

[0028] B. Transport the pulped material to the first-stage leaching tank at atmospheric pressure, and then add NiCO 3 Adjust the pH value to 5.0, then heat to 70-80°C, and stir with oxygen for 2 hours to obtain the leaching solution; wherein, the oxygen flow rate per hour is 10-20L / m 3 solution;

[0029] C. Oxidize and remove impurities step by step on the leaching solution, specifically adding an oxidant and stirring for 2 hours to remove impurities such as cobalt ...

Embodiment 2

[0031] A. At 40m 3 Add 22m to the mixing tank 3 Anolyte, 7t of manganese-containing nickel hydroxide and reducing agent were added and stirred for 30 minutes. Among them, the amount of reducing agent added for every 1 ton of manganese-containing nickel hydroxide is 50Kg, the reducing agent is sodium bisulfite, the anolyte is nickel sulfate solution containing nickel 50g / L, and the acidity is controlled by adding dilute sulfuric acid to 50g / L.

[0032] B. Transport the pulped material to the first-stage leaching tank at atmospheric pressure, and add NiCO 3 Neutralize the pH value to 5.0, then heat to 70-80°C, pass through oxygen and stir for 2 hours to obtain the leaching solution; wherein, the amount of oxygen per hour is 10-20L / m 3 solution;

[0033] C. Carry out oxidation and impurity removal on the leaching solution, specifically adding an oxidizing agent and stirring for 1 to 2 hours to remove elements such as manganese and cobalt. The temperature of the impurity rem...

Embodiment 3

[0036] A. At 40m 3 Add 20m 3 Anolyte, 6t of manganese-containing nickel hydroxide and reducing agent were added and stirred for 20 minutes. Wherein, the reducing agent is sodium sulfite, and the amount of reducing agent added per 1 ton of manganese-containing nickel hydroxide is 45Kg. Wherein, the anolyte is nickel sulfate solution containing nickel 45g / L, and the acidity is controlled to 40g / L by adding dilute sulfuric acid.

[0037] B. Transport the pulped material to the first-stage leaching tank at atmospheric pressure, and then add NiCO 3 Adjust the pH value to 5.0, then heat to 70°C, and stir with oxygen for 1.5 hours to obtain the leaching solution; wherein, the amount of oxygen per hour is 10L / m 3 solution;

[0038] C. Carry out oxidative removal of impurities on the leachate, specifically adding an oxidant and stirring for 2 hours to remove impurities such as cobalt and manganese; the temperature of the removal process is controlled at 80°C, and the pH value is ad...

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Abstract

The invention discloses a method for producing electrolytic nickel by leaching and purifying manganese-containing nickel hydroxide. The method comprises the following steps: performing normal pressure leaching on a manganese-containing nickel hydroxide raw material according to a mass ratio (3-4):1 of anode liquor to nickel hydroxide and the acidity of 45-50g / L, oxidizing the leaching solution to remove cobalt and manganese impurities and performing electrolysis, and producing the electrolytic nickel. The electrolytic nickel is produced through leaching and purifying manganese-containing nickel hydroxide, the production scale can be variable, the utilization range of mineral resources is wide, and the investment and treatment equipment do not need to be increased. Moreover, the method has the characteristics of simple process route, low investment, low energy consumption, low operating cost, simple and convenient operation and low production cost, and the nickel and cobalt leaching rate is 99 percent. According to the method, the environment is not polluted, the nickel leaching rate is high, an extremely effective, economic and applicable path is provided for developing and utilizing the nickel hydroxide which has complex chemical components and contains manganese and cobalt, and the defects that the manganese-containing nickel hydroxide is difficultly treated, the leaching rate is low, the process for purifying and separating manganese and other impurities is complex and the efficiency is low in the prior art are overcome.

Description

technical field [0001] The invention belongs to the field of mineral processing, and in particular relates to a method for producing electrolytic nickel by leaching and purifying manganese-containing nickel hydroxide. Background technique [0002] At present, the main raw material of electrolytic nickel is sulfide ore, and some manufacturers use oxidized laterite nickel ore. Sulfide ore does not contain manganese, and its wet smelting process is mainly atmospheric pressure or pressure ammonia leaching, normal pressure or pressure acid leaching. Hydrometallurgical process of oxidized laterite ore Reductive ammonia leaching and high pressure acid leaching. Oxidized laterite nickel ore is rich in resources, wide in sources, cheap in price, has the potential for large-scale production, and has developed rapidly in recent years. However, due to the many and complex impurities in the mineral material, especially the high content of manganese, the separation and purification proc...

Claims

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Application Information

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IPC IPC(8): C22B3/06C22B3/44C25C1/08
Inventor 陈建兵李长寿李海峰代云
Owner SHAANXI HUAZE NICKEL & COBALT METAL