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Method for preparing refined nickel sulfate from copper-removed solution of copper electrolyte

A technology for decoppering solution and copper electrolyte is applied in the field of preparing refined nickel sulfate and copper electrolyte solution after decoppering to prepare refined nickel sulfate, which can solve the problems of high operating cost and large investment, achieve good effect and simplify the process , the effect of eliminating the extraction process

Active Publication Date: 2020-04-10
CHANGSHA HASKY ENVIRONMENTAL PROTECTION TECH DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It can be seen that the extraction has a good effect of removing impurities, but there are also many disadvantages, including large investment, high operating costs, and the liquid after extraction needs to be degreased, etc.

Method used

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  • Method for preparing refined nickel sulfate from copper-removed solution of copper electrolyte
  • Method for preparing refined nickel sulfate from copper-removed solution of copper electrolyte
  • Method for preparing refined nickel sulfate from copper-removed solution of copper electrolyte

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Embodiment 1

[0033] A method for preparing refined nickel sulfate from the copper electrolyte solution after decopper removal of the present invention, such as figure 1 shown, including the following steps:

[0034] The composition of the copper electrolyte after copper removal in a copper smelter is shown in Table 1.

[0035] Table 1 Composition of copper electrolyte after copper removal

[0036]

[0037] (1) Salt acid separation: After the copper electrolyte is decoppered and filtered through a 1μm filter membrane, the acid and metal ions are separated by a resin column equipped with 2.3L strong basic anion exchange resin (acid adsorption resin), so that The acid is adsorbed to obtain the deacidified nickel sulfate stock solution, and then the acid adsorption resin is washed with water, so that the acid is eluted, and the recovered acid solution is obtained, which is used to return to the copper system for acid supplementation.

[0038] Among them, the recovered acid solution contai...

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PUM

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Abstract

The invention discloses a method for preparing refined nickel sulfate from copper-removed solution of copper electrolyte. The method comprises the following steps that the copper-removed solution of the copper electrolyte is subjected to acid-salt separation for separating sulfuric acid and nickel sulfate, primary vulcanization, neutralization impurity removal, calcium and magnesium removal by fluoride, secondary vulcanization, nickel adsorption by an adsorbing material and concentration crystallization to obtain a refined nickel sulfate product. According to the method, the copper-removed solution of the copper electrolyte is directly purified, so that the primary concentration crystallization cost is saved; and the nickel yield is high, the purification process is simple, and a traditional extraction process is omitted, so that the investment cost and the operation cost are greatly reduced.

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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B23/00C22B3/24C22B3/44
CPCC22B3/24C22B3/44C22B23/0453C22B23/0461Y02P10/20
Inventor 夏栋蒋晓云何劲松刘雅倩杨兴海阳春华黄科科
Owner CHANGSHA HASKY ENVIRONMENTAL PROTECTION TECH DEV CO LTD
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