Method for extracting nickel from chemically-deposited nickel sulfide materials

A chemical precipitation, nickel sulfide technology, applied in the direction of improving process efficiency, can solve the problems of difficult control, sulfur dioxide and hydrogen sulfide gas overflow, and high equipment investment, achieve good comprehensive recycling effect, be beneficial to environmental protection and production operations, and high efficiency. The effect of metal recovery

Active Publication Date: 2018-08-24
GUANGDONG JIANA ENERGY TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] To sum up, the current process for processing chemically precipitated nickel sulfide materials mainly adopts fire roasting or smelting. This process is prone to overflow of sulfur dioxide and hydrogen sulfide gas, which deteriorates the working environment, and corresponding absorption equipment is required.
However, the wet treatment of nickel sulfide materials generally adopts a high-pressure oxygen-acid leaching process. This process has high equipment investment, complicated technical operations, and high requirements for personnel quality. Nickel sulfide will react with sulfuric acid quickly under high pressure to generate hydrogen sulfide. Doubling, difficult to control, has certain security risks

Method used

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  • Method for extracting nickel from chemically-deposited nickel sulfide materials

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Experimental program
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Effect test

Embodiment 1

[0033] Put the chemically precipitated nickel sulfide material (containing Ni 48.92%, Co 0.24%, Ca 0.41%, Fe 3.19%, Al 0.02%, S 27.42%) into the reaction tank, add water to adjust the slurry according to the liquid-solid ratio of 4:1, and stir The speed is 400 r / min, and sodium hydroxide is added to adjust its pH to 8.0; The temperature is 30°C, and the reaction time is 5h; after the reaction is completed, the initial hydrogen ion concentration in the reactor is 1.5mol / L after adding sulfuric acid, the leaching temperature is controlled at 80°C, the stirring speed is 400r / min, and the leaching time is 7h; filter, Obtain leaching liquid and leaching slag; return leaching slag to slurry; adjust pH of leaching liquid to 3.5-4.0; after filtering, carry out multi-stage countercurrent extraction and removal of impurities with sodium soap P204 (containing 75% kerosene) extraction system at a ratio of 1:1 , the nickel-loaded organic can be back-extracted with 2mol / L sulfuric acid solu...

Embodiment 2

[0035] Put the chemically precipitated nickel sulfide material (containing Ni 48.92%, Co 0.24%, Ca 0.41%, Fe 3.19%, Al 0.02%, S 27.42%) into the reaction tank, add water to adjust the slurry according to the liquid-solid ratio of 7:1, and stir The speed is 200 r / min, and adding sodium hydroxide is adjusted to its pH to 9.5; 50°C, the reaction time is 9h; after the reaction is completed, the initial hydrogen ion concentration in the reactor is 3.0mol / L after adding hydrochloric acid, the leaching temperature is controlled at 98°C, the stirring speed is 250r / min, and the leaching time is 3h; filter, Obtain leaching solution and leaching slag; Nickel content is 0.08wt% in the detection slag, promptly sends outside slag field unified processing and gets final product; The pH of leaching solution is adjusted to 4.0; After filtering, compare 1:1 with nickel soap P204 (containing 75% kerosene) extraction system for multi-stage countercurrent extraction to remove impurities, nickel-lo...

Embodiment 3

[0037] Put the chemically precipitated nickel sulfide material (containing Ni 51.04%, Co 0.12%, Ca 0.35%, Fe 2.07%, Al 0.15%, S 28.46%) into the reaction tank, add water to adjust the slurry according to the liquid-solid ratio of 5:1, and stir The speed is 300 r / min, and adding sodium hydroxide is adjusted to its pH to 9.0; 40°C, the reaction time is 7h; after the reaction is completed, the initial hydrogen ion concentration in the reactor is 2.5mol / L after adding hydrochloric acid, the leaching temperature is controlled at 90°C, the stirring speed is 300r / min, and the leaching time is 3h; filter, Obtain leaching solution and leaching slag; the nickel content in the slag is detected to be 0.38wt%, just return to slurry; the pH of the leaching solution is adjusted to 4.0; after filtering, compare with nickel soap P204 (containing 75% kerosene) by 1:1 The extraction system carries out multi-stage countercurrent extraction to remove impurities. After the nickel-loaded organic is ...

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Abstract

The invention discloses a method for extracting nickel from chemically-deposited nickel sulfide materials. In an alkalescence system, the nickel sulfide in nickel sulfide material pulp and sodium hypochlorite have a reaction to generate nickel chloride; nickel hydroxide generated by nickel sulfate in the nickel sulfide material pulp and the sodium hypochlorite react to generate nickelic hydroxide,and the nickelic hydroxide has strong oxidability and can accelerate the nickel sulfide oxidization effect. After alkaline oxidation is finished, the pulp is subjected to acid dissolving through sulfuric acid or hydrochloric acid, the incompletely-reacting vulcanized materials and the nickelic hydroxide react, and nickel is leached; after leachate is subjected to chemical and extraction impurityremoval, a high-purity nickel sulfate solution is obtained, and after oil removal, through evaporative crystallization, a nickel sulfate product can be obtained or the high-purity nickel sulfate solution is conveyed to be subjected to nickel electrolyzing . According to method, generation of sulfur dioxide, hydrogen sulfide gas and other harmful gases is avoided, environment protection and production operation are better facilitated, the cost is low, pollution is little, and the comprehensive recycling effect is good.

Description

technical field [0001] The invention relates to the technical field of nonferrous metal hydrometallurgy, in particular to a method for extracting nickel from chemically precipitated nickel sulfide material. Background technique [0002] Nickel metal has excellent properties such as energy storage, corrosion resistance, wear resistance, high temperature resistance and high strength. It is widely used and has become an important strategic material for the development of the national economy. However, my country is one of the countries that lack nickel ore resources, and most of them rely on imports. Nickel sulfide material is one of them. It mainly comes from low-grade nickel ore or the leach solution recovered from nickel secondary resources. By adding sulfide agent to enrich nickel, the resulting metal sulfide is precipitated. [0003] At present, some enterprises use the fire method to roast the precipitated nickel sulfide material to obtain sintered nickel oxide, which is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B23/00C22B3/08C22B3/10C22B3/38
CPCC22B3/08C22B3/10C22B23/0423C22B23/043C22B3/3846Y02P10/20
Inventor 黄亚祥彭灿徐定源何玉娴
Owner GUANGDONG JIANA ENERGY TECH CO LTD
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