Method for vulcanizing and separating valuable metal in solution through controlled potential

Abstract

The invention discloses a method for vulcanizing and separating valuable metal in a solution through controlled potential. The method comprises the steps that 1, alkali and sulfate are simultaneously added into the copper-cobalt-manganese solution to remove calcium in the solution; 2, sodium sulphide is added into the calcium removed solution to enable the mixed potential of metal ions in the solution to be controlled to be a required value, and meanwhile hydrochloric acid is added to adjust the pH value of the solution; 3, after the solution potential is stabilized and continuously stirred, filtering and copper removing are conducted; 4, after coppering removing is completed, the sodium sulphide is added to enable the mixed potential of the metal ions in the solution to be controlled to be the required value, and the hydrochloric acid is added to adjust the pH value; 5, after the solution potential is stabilized and continuously stirred, filtering is conducted; and 6, the pH value of the cobalt removed solution is neutralized through the alkali to reach a required value, the solution is filtered after being stirred, deposited manganese slag is obtained, and selective step-by-step separation of the valuable metal in the solution is achieved. According to the method for vulcanizing and separating the valuable metal in the solution through the controlled potential, selective separation of the valuable metal in the solution is achieved by controlling the mixed potential of the metal ions in the solution and the pH value at the same time; selective separation of the valuable metal in the solution is achieved, and the deposition rate of copper, the deposition rate of cobalt and the deposition rate of manganese are all 99.0% or above.

Description

technical field [0001] The invention relates to a hydrometallurgical process in the field of nonferrous metallurgy, in particular to a hydrometallurgical method using potential-controlled vulcanization to separate valuable metals in a solution. Background technique [0002] Cobalt is a steel-gray metal with metallic luster. Its excellent physical properties determine its wide application in cemented carbide, heat-resistant alloy, lithium-ion battery cathode material and pigment industry. However, my country's cobalt resources are very scarce, and it has long relied on importing cobalt ore from countries such as Congo (Kinshasa) and Zambia, which are rich in cobalt resources. implementation, cobalt ore needs to be smelted into copper-cobalt alloy by electric furnace for export, so copper-cobalt alloy replaces cobalt ore and becomes an important cobalt raw material in the Chinese market. Here comes the difficulty. [0003] The classic process of extracting cobalt from cobalt o...

AI Technical Summary

Problems solved by technology

Although this method can realize the selective separation of manganese and nickel, adding a large amount of ammonium salt changes the solution system and brings great difficulties to the subsequent treatment of the solution.

[0007] The development of these methods can realize the recovery of valuable metals in the copper-cobalt-manganese solution, but there are some defects that restrict its application, such as high treatment cost, long process flow and difficult wastewater treatment, so there are copper-cobalt-manganese solutions. The effective separation and recovery of valent metals is still an urgent problem in this field

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