Process for recovering cobalt, copper, zinc and manganese in manganese chloride residual liquid

Abstract

The invention relates to a process for recovering cobalt, copper, zinc and manganese in a manganese chloride residual liquid. By using the process, the recovery rates of cobalt, copper, zinc and manganese are above 90%, the contents of impurities in recovered cobalt, copper, zinc and manganese products are below 1g / L, and the contents of the impurities in the manganese product are below 2%. The process mainly comprises the following steps: regulating the concentration of chlorine ions in the manganese chloride residual liquid to 250-350g / L; extracting cobalt, copper and zinc in the manganese chloride residual liquid with N235, and reserving manganese in raffinate; then stripping cobalt, copper and zinc in an organic phase with a stripping agent so as to obtain pure cobalt chloride, a copper chloride solution and a zinc precipitate, washing, drying and calculating the zinc precipitate so as to obtain a zinc oxide product; extracting manganese in the raffinate with P204, stripping with an acid so as to obtain a manganese salt solution; and carrying out evaporation, crystallization and drying on the manganese salt solution so as to obtain the manganese salt product. The process has the advantages of short process flow, high valuable metal recovery, high recovered product purity and low recover cost.

Description

technical field [0001] The invention belongs to the field of hydrometallurgy and chemical industry, in particular to a method for recovering cobalt, copper, zinc and manganese in manganese chloride raffinate. Background technique [0002] At present, when dealing with ores containing cobalt, copper, zinc, and manganese at the same time, after the cobalt, copper, zinc, and manganese in the ore are often leached, the copper in the leaching solution is first separated by Lix984 and other extractants, and then the copper in the leachate is separated with P 2 0 4 The extractant is used to separate cobalt, and the solution containing zinc and manganese (entraining part of cobalt and copper) is precipitated with carbonate, etc., and then returned to the fire method system to recover the cobalt and copper. Among them, zinc is volatilized during fire method recovery, and manganese Discarded by slag making, the recovery rate of cobalt and copper in this method is extremely low, and z...

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Problems solved by technology

[0002] At present, when dealing with ores containing cobalt, copper, zinc, and manganese at the same time, after the cobalt, copper, zinc, and manganese in the ore are often leached, the copper in the leaching solution is first separated by Lix984 and other extractants, and then the copper in the leachate is separated with P 2 0 4 The extractant is used to separate cobalt, and the solution containing zinc and manganese (entraining part of cobalt and copper) is precipitated with carbonate, etc., and then returned to the fire method system to recover the cobalt and copper. Among them, zinc is volatilized during fire method recovery, and manganese Discarded by slag making, the recovery rate of cobalt and copper in this method is extremely low, and zinc and manganese cannot be recovered, resulting in a great waste of resources and environmental pollution; Lix984 is often used to extract copper, P 204 The process of extracting zinc, HA-1 extracting cobalt and separating manganese, the process is long, high cost and low recovery rate of valuable metals