Method for producing electrodeposited nickel

Abstract

The invention discloses a method for producing electrodeposited nickel. The method comprises the following steps of: conveying nickel sulfate electrolyte to the bottom of an electrodeposition cell through a catholyte pipe, enabling the nickel sulfate electrolyte to flow into the cell through liquid inlet holes uniformly distributed in the catholyte pipe, performing electrodeposition in the cell, and limiting acid fog and oxygen generated in the electrodeposition process in an anode cap; and pumping anolyte, oxygen and acid fog generated by electrodeposition into an anolyte main pipe by a vacuum pump through liquid outlet holes, and then entering a steam-water separator for gas-liquid separation. According to the method, the fluidity of the liquid is effectively improved through liquid feeding at the bottom of the electrodeposition cell, elimination of formed concentration polarization is facilitated, nickel ion depletion is reduced, and the electrodeposition efficiency is improved; the hydrogen ion concentration is reduced, and pore plates are reduced; through anode bagging, the phenomenon of bag sticking caused by cathode bagging is reduced, electrodeposited nickel loading operation is facilitated, and meanwhile, the appearance quality of the electrodeposited nickel can be improved; and through the arrangement of the anode cap, the acid fog is prevented from being directly discharged to a plant, and the operation environment of electrodeposition production is improved.

Description

technical field [0001] The invention relates to the field of metallurgy, in particular to a method for producing electrolytic nickel. Background technique [0002] The pressure leaching production line adopts the process of pressure leaching-extraction-electrodeposition to produce electro-deposition nickel. The existing nickel electro-deposition system adopts the traditional cathode diaphragm electro-deposition process. During the electro-deposition process, the catholyte in the diaphragm bag depends on the liquid level difference Flowing to the anode area, due to the poor fluidity of the solution in the cathode area, the solution produces concentration polarization during the electrowinning process. In order to reduce the concentration polarization, the circulation of the solution must be increased, resulting in nickel in the anode and cathode solutions during the electrowinning process. The difference in ion concentration is small, the direct recovery rate of nickel in the...

AI Technical Summary

Problems solved by technology

The anode chamber is exposed to the air, and acid mist is generated during the electrowinning process, which makes the acid mist in the plant large and the operating environment is poor

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