Domestic cobalt-containing pyrite and pyrrhotite, pyrite concentrate cobalt concentrate known, is one of the major refining cobalt material. Nanjing Steel, Huludao Zinc, Hubei, Shandong actinic phosphorus fertilizer plant and plant Zibo Cobalt four manufacturers use this material. The product of Huludao Zinc Plant is No. 2 electro-cobalt, which adopts the method of sulphating roasting → leaching → fatty acid de-ironing copper → sinking cobalt → reducing casting anode → anolyte purification → diaphragm electrolysis, which has been discontinued due to high production cost. Nanjing Steel Plant used oxidizing roasting-sintering slag in medium temperature chlorination roasting process, and Hubei Guanghua Phosphate Fertilizer Plant used oxidizing roasting-sintering sulphate roasting process. However, since cobalt-sulfur concentrates are too low in cobalt, generally less than 0.3%, and the process of recovering cobalt is complicated and generally unprofitable, these plants have stopped production after a period of production. Shandong Zibo Cobalt Plant uses cobalt-sulfur concentrate and cobalt-containing raw materials to produce cobalt sulfide, cobalt oxide, cobalt chloride, cobalt sulfate and other products.
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