A kind of method for preparing refined nickel sulfate from copper electrolytic solution after decoppering

A technology of decopper solution and copper electrolyte, which is applied in the field of hydrometallurgy, can solve the problems of high operating costs and large investment, and achieve the effects of reducing investment costs, good effect, and simple and direct process
CN110983070BActive Publication Date: 2020-12-15CHANGSHA HASKY ENVIRONMENTAL PROTECTION TECH DEV CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHANGSHA HASKY ENVIRONMENTAL PROTECTION TECH DEV CO LTD
Publication Date
2020-12-15

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Abstract

The invention discloses a method for preparing refined nickel sulfate from copper electrolyte decoppered liquid, which includes separating sulfuric acid and nickel sulfate through acid salt separation, primary sulfurization, neutralization and impurity removal, fluoride Removal of calcium and magnesium, secondary vulcanization, adsorption of nickel by adsorbent materials and concentrated crystallization to produce refined nickel sulfate products. The method of the present invention directly purifies the decoppered copper electrolyte, saving the cost of primary concentration and crystallization, and has a high nickel yield, a simple purification process, and eliminates the traditional extraction process, thereby significantly reducing investment costs and operating costs.
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Description

technical field

[0001] The invention belongs to the technical field of hydrometallurgy, and relates to a method for preparing refined nickel sulfate, in particular to a method for preparing refined nickel sulfate from copper electrolytic solution after decoppering. Background technique

[0002] In the copper electrolytic refining process, due to the enrichment of impurities such as arsenic, antimony and bismuth, it is necessary to open the copper electrolyte and separate and recover the valuable metals in it. Among them, the traditional way to open the circuit and recover nickel is: to concentrate and crystallize or freeze the copper electrolyte solution after decoppering to prepare crude nickel sulfate. If refined nickel sulfate is to be prepared, the crude nickel sulfate is dissolved and purified, and then crystallized into refined nickel sulfate.

[0003] Many existing patent documents prepare crude nickel sulfate by crystallization. However, the crystallization method i...

Claims

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