Comprehensive recovery processing method for cobalt-sulfur concentrates

Abstract

The invention belongs to the technical field of nonferrous metallurgy and particularly relates to a comprehensive recovery processing method for cobalt-sulfur concentrates. The comprehensive recoveryprocessing method comprises the following steps: carrying out oxidizing boiling roasting on the cobalt-sulfur concentrates so as to obtain roasted sand and SO2 flue gas, carrying out purification anddust removal on the SO2 flue gas, introducing the SO2 flue gas into a flue gas acid-making system, and carrying out acid making; after the roasted sand is cooled, carrying out ball milling so as to obtain fine particles, carrying out pulpifying and presoaking on the fine particles, carrying out continuous and selective leaching by virtue of a continuous pressurizing system, pre-neutralizing lime milk ore pulp so as to obtain supernate and a filter residue, treating the supernate, introducing the supernate into a copper extraction system, and carrying out extraction, so as to obtain cathode copper, an electrodeposited liquid and raffinate; and washing the filter residue to obtain a washing liquid, carrying out pulpifying and presoaking on the roasted sand by virtue of the electrodeposited liquid and the washing liquid which are taken as a pulpifying liquid, introducing raffinate into a cobalt precipitation process and a magnesium precipitation process, carrying out cobalt precipitationand magnesium precipitation so as to obtain cobalt and magnesium solids, and transporting the cobalt and magnesium solids to a residue field, and carrying out stockpiling. According to the method, cobalt and copper in ores can be effectively recycled once, the recovery rates of cobalt and copper are high, low grade cobalt and sulfur concentrates can be effectively treated, and the maximal utilization of resources is realized.

Description

technical field [0001] The invention relates to the technical field of nonferrous metallurgy, in particular to a method for comprehensive recovery and treatment of cobalt-sulfur concentrate. Background technique [0002] At present, the processing technology of cobalt-sulfur concentrate at home and abroad can be divided into the following categories: 1) Pyromelting: cobalt-sulfur concentrate is treated by pyrolysis, and pyrotechnics such as oxygen-enriched blowing, continuous blowing, and anode furnace refining are used. The copper cobalt sulfide in cobalt sulfur concentrate is first converted into copper matte, then refined into blister copper, cast into anode plate, and then electrolytic refining is used to recover copper and cobalt. This process is simple, the raw material adaptability is strong, and the processing capacity is large, but For low-grade cobalt-sulfur concentrates, there is a problem of low grade, and the cobalt recovery rate in this process is low, and the ...

AI Technical Summary

Problems solved by technology

The copper cobalt sulfide in cobalt sulfur concentrate is first converted into copper matte, then refined into blister copper, cast into anode plate, and then electrolytic refining is used to recover copper and cobalt. This process is simple, the raw material adaptability is strong, and the processing capacity is large, but For low-grade cobalt-sulfur concentrates, there is a problem of low grade, and the cobalt recovery rate in this process is low, and the market price of cobalt is high, so the pyrolysis treatment outweighs the benefits; 2) Sulfation roasting: Sulfation roasting has low sintering temperature and can With the characteristics of less consumption, it can directly convert the cobalt copper sulfide in the ore into soluble cobalt copper sulfate, and the latter can directly separate the valuable metal from the ore by means of water leaching, so this process can greatly shorten the cobalt sulfur Concentrate comprehensive recovery treatment process, but the sulfuration roasting process also has the problem of low cobalt recovery rate, only about 75%, at the sam

Images