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Technology for preparing cell-level high purified nickel sulfate by the selective leach of water quenching high grade nickel and sulfuric acid

A selective, nickel sulfate technology, applied in the field of hydrometallurgy, can solve problems such as the difficulty in producing battery-grade high-purity nickel sulfate, and achieve the effects of high labor production efficiency, good product quality, and advanced technology

Active Publication Date: 2004-11-10
JILIN JIEN NICKEL IND
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AI Technical Summary

Problems solved by technology

However, the purification and separation process of this process brings other impurity ions (such as Na + , Cl - etc.), it is difficult to produce battery-grade high-purity nickel sulfate

Method used

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  • Technology for preparing cell-level high purified nickel sulfate by the selective leach of water quenching high grade nickel and sulfuric acid

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Experimental program
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Embodiment Construction

[0025] The present invention will be further described below using the drawings and examples.

[0026] refer to figure 1 , the process of preparing battery-grade high-purity nickel sulfate by selective leaching of high matte nickel sulfuric acid by water quenching includes the following steps in turn:

[0027] Water crushing high nickel matte fine grinding process 1 adopts two-stage overflow ball mill self-flow series open-circuit fine grinding;

[0028] The first normal-pressure leaching process 2 is to flush the finely ground high-matte pulp with water and the leaching solution of the liquid-solid separation process 6 into the pulping tank, continuously feed air into the pulping tank, add 93% sulfuric acid, stir evenly, and Atmospheric pressure leaching tank for the first stage of normal pressure leaching;

[0029] Liquid-solid separation step 3 is to send the first stage of atmospheric pressure leached pulp to a thickener for liquid-solid separation, and the separated fir...

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Abstract

The invention is a technique of making battery-level highly pure nickel sulphate by selective extraction of water quenched high nickel matte with vitriol, and its character: it contains in turn: finely grinding the high nickel matte, the first stage, normal pressure extraction, making evaporation crystallization on the extract and pulping the residues for preextraction; the second stage, pressure extraction, return the extract to the first stage for normal pressure extraction, and making pressure extraction on the residues in the third stage, and making copper electrowinning process on the extract to produce copper or evaporation crystallization on the extract to make copper sulphate, and returning the anode solution for the copper electrowinning process or the mother solution for evaporation crystallization for pulping and preextraction, making vacuum evaporation crystallization on the extracts in the three stages to make battery-level high-purity nickel sulphate.

Description

technical field [0001] The invention relates to the field of hydrometallurgy, and relates to a process for preparing battery-grade high-purity nickel sulfate by selective leaching of water-quenched high-matte nickel sulfuric acid. Background technique [0002] The production process of nickel sulfate varies with raw materials and product uses. The existing classic production process is: dissolving water-quenched nickel or carbonyl nickel with sulfuric acid, and evaporating and crystallizing the nickel-rich solution. Its advantage is that the process is short and the product quality is high, but due to the high price of raw materials, this process is usually not used; another process is to use low-copper and high-nickel matte or nickel-containing materials as raw materials, and all valuable metals are leached by sulfuric acid pressure , and then purified and separated, evaporated and crystallized to produce nickel sulfate. However, the purification a...

Claims

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Application Information

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IPC IPC(8): C01G53/10C22B3/08
CPCY02P10/20
Inventor 徐广平安本周敖东陈国英朴东鹤姜春生张国裕周凤云郑志民黄振华
Owner JILIN JIEN NICKEL IND
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