Wet process preparation technique of nickel

Abstract

The invention discloses a wet process preparation technique of nickel. The technique comprises the steps that water quenching is conducted on metallized high-nickel matte; ball milling is conducted, deposition is conducted through a thickener, first-section normal pressure is applied, first-section leaching liquid, namely the finished liquid, is subjected to cobalt removal through NIOOH prepared through electrooxidation, purified cobalt-removed post-liquid is obtained through liquid-solid separation, acid adjustment is conducted for electrodeposition, and electro nickel is obtained; and electrodeposition post-liquid is subjected to sodium washing and nickel deposition so that Na+ in a solution can be removed, then anode liquid is mixed with NiCO3 to prepare cathode liquid, then the cathode liquid and the cobalt-removed post-liquid are mixed, subjected to acid adjustment and directly subjected to electrodeposition, and the electro nickel is obtained. The anode liquid and nickel return liquid are converted into the cathode liquid, so that the step that the anode liquid returns to a leaching system is omitted, an original complex and lengthy circulation path is replaced by internal short-path circulation, the circulation cost of the solution is greatly reduced, the yield of the cathode liquid is increased, production loads of a grinding and leaching plant are relieved, and meanwhile, the acid amount of the system can be balanced.

Description

technical field [0001] The application belongs to the technical field of chemical industry, and in particular relates to a nickel wet preparation process. Background technique [0002] At present, the preparation process of nickel hydrometallurgy process is as follows: a two-stage countercurrent leaching process with one stage of normal pressure and one stage of pressurization is used to suppress copper, iron and precious metals in the leaching slag, nickel and cobalt are selectively leached into the solution, and the purification process adopts NiOOH (black nickel) cobalt removal method, the purified leaching solution is used to produce metallic nickel by electrowinning. The process has the advantages of high metal recovery rate, no use and generation of harmful gas in the process, and is beneficial to environmental protection. [0003] However, with the continuous expansion of the production capacity of the smelter, many process problems have emerged in this set of wet pr...

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Problems solved by technology

[0003] However, with the continuous expansion of the production capacity of the smelter, many process problems have emerged in this set of wet process, such as complicated and lengthy processes, and its processing cost is much higher than other nickel production processes. It is imminent to control the production cost

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