Method of recycling copper and cobalt from cobalt containing waste liquid of copper hydrometallurgy

Abstract

The invention provides a method of recycling copper and cobalt from cobalt containing waste liquid of copper hydrometallurgy. The method comprises the following steps that impurity removal treatment is conducted on the cobalt containing waste liquid to remove impurities in the waste liquid, wherein the impurities comprise one or more of solid particle matter, suspended matter and oil matter; the impurity-removed cobalt containing waste liquid is concentrated and separated through a nanofiltration device, and thus a concentrated solution with the concentration increased and dialysate with the concentration decreased are obtained; copper chemical extraction treatment is conducted on the concentrated solution to form a copper-enriched solution and cobalt containing raffinate; neutralization impurity removal treatment is conducted on the cobalt containing raffinate to at least partially remove other metal ions except the cobalt; and chemical precipitation treatment is conducted on the cobalt containing raffinate subjected to neutralization impurity removal to recycle the cobalt. The method of recycling the copper and the cobalt from the cobalt containing waste liquid of copper hydrometallurgy improves the cobalt recycle rate.

Description

technical field [0001] The invention relates to the technical field of hydrometallurgy, in particular to a method for recovering copper and cobalt from cobalt-containing waste liquid of copper hydrometallurgy. Background technique [0002] Metal cobalt is one of the most important strategic minerals in the world. In 2017, global cobalt consumption was about 115,000 metal tons, a year-on-year increase of nearly 11%. Among them, lithium batteries, super alloys, hard alloys and other industries have relatively strong demand. In 2017, the domestic metal cobalt price rose by about 97%. Since 2018, the international cobalt price has risen steadily at a rate of 1% per week. Market institutions predict that the cobalt price may break through the high of $55 this year. With the strengthening of domestic environmental governance, the new energy vehicle battery consumption market has huge potential. The proportion of cobalt metal consumption in the field of new energy vehicles has rise...

AI Technical Summary

Problems solved by technology

In this method, the copper raffinate is concentrated and separated through a nanofiltration device to obtain a concentrated solution of higher concentration of copper and cobalt, and then the copper and cobalt metals are recovered by neutralization and impurity removal-copper precipitation-multi-stage cobalt precipitation, which overcomes the traditional copper The deficiencies and problems exist in the large amount of liquid in the raffinate treatment, the need to consume a large amount of neutralizing agent, the generation of a large amount of neutralization slag, and the inability to comprehensively recycle valuable metals and sulfuric acid in the copper raffinate.

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