Method for directly producing high-purity electronic level cobaltous sulfate by using cobalt-containing waste

Abstract

The invention provides a method for directly producing high-purity electronic level cobaltous sulfate by using cobalt-containing waste, in particular a process for producing cobaltous sulfate by using cobalt-containing waste. The method comprises the steps of: checking and classifying raw materials, wet-milling and size-mixing, acid-decomposing, filtering, washing, separating, and extracting copper sponge. The method is characterized by also comprising the steps of: removing iron with a goethite process, extracting P2O4 and removing impurities, separating nickel from cobalt, extracting N235, purifying, concentrating and crystallizing. The high purity electron level cobaltous sulfate is directly regenerated by using various kinds of cobalt wastes, the requirement of the modern high-technology industry on high purity of the cobaltous sulfate is met; the total recovery of the cobalt is higher than or equal to 98 percent; various usable elements can be comprehensively recycled, and coppersponge, tungsten carbide, iron hydroxide and nickel carbonate can be regenerated while the electronic level cobaltous sulfate as a main product is regenerated. The invention has the advantages of comprehensively utilizing waste cobalt resources, recycling the wastes, improving the enterprise benefit, and being beneficial to the development of energy conservation, emission reduction, environment protection and circular economy.

Description

technical field [0001] The invention relates to a process for producing cobalt sulfate from waste materials containing cobalt. Background technique [0002] At present, there are two types of cobalt sulfate production technologies at home and abroad: electrolysis method and chemical reaction method. The preparation of cobalt sulfate by chemical reaction method varies according to different raw materials: such as the Chinese invention patent with the patent number ZL96105194.9 (hereinafter referred to as the existing Technology 1) The process adopted is: metal cobalt is prepared with hydrochloric acid to produce metal cobalt solution—adding sulfuric acid to heat up to produce cobalt sulfate solution—drying cobalt sulfate solution to produce cobalt sulfate crystals; another example is "Research and Production Practice of New Technology for Cobalt Slag Treatment" Guan Yajun World Nonferrous Metals 2006 No. 4 (hereinafter referred to as prior art 2), the cobalt sulfate productio...

AI Technical Summary

Problems solved by technology

There are some problems in these existing methods: the one, it is difficult to produce high-purity cobalt sulfate

This not only wastes resources, but also causes environmental pollution, which is not conducive to the development of energy saving, emission reduction and circular economy.