Cobalt process

At present, the world's cobalt smelting capacity exceeds 30,000 tons per year, most of which comes from copper -cobalt sulfide ore and nickel -copper-cobalt sulfide ore. The production in the Congo ( Gold ) and Zambia countries accounts for about 60%. China's annual output of cobalt is more than 1000t. The main manufacturers are Jinchuan Company and Zhangzhou Cobalt Plant. Different from the extraction of copper and nickel by fire method, the extraction process of cobalt mostly adopts the wet process. However, due to the different ore sources, the process flow adopted by each manufacturer is quite different.
Foreign mention cobalt main processes can be divided into: a, from the copper - lifting and oxide ore with the sulfating roasting cobalt sulphide ore leaching of cobalt sulfide ores, the leach solution after iron electrolytic copper extraction, the electrolysis liquor in addition to the iron, aluminum and heavy addition Cobalt and cobalt slag are re-dissolved and electrolyzed to extract cobalt.
2. A cobalt-containing by-product precipitated as a mixed sulfide, hydroxide or carbonate in a cobalt-nickel system from a by-product of a nickel-copper sulfide ore wet process, obtained by acid leaching or pressurized acid leaching to obtain a cobalt-containing solution, Purify and remove impurities, electrolyze cobalt; or be used to produce other cobalt products.
Third, from the arsenic cobalt ore in the cobalt blast furnace smelting â†’ pressurized alkali leaching arsenic â†’ sulfuric acid leaching â†’ cobalt extraction; pressurized acid leaching â†’ purification â†’ electrolysis.
4. Extraction of cobalt sulphate from pyrite â†’ leaching â†’ purification and decontamination â†’ oxidative hydrolysis of cobalt sulphate â†’ reduction smelting â†’ electrolysis 5. From the sulphide ore (red earth ore) Nickel-cobalt mixed sulfideâ†’Ammonia leachingâ†’NiCo separationâ†’High-pressure hydrogen reduction of cobalt sulfate solutionâ†’Cobalt powder.
6. Recovery of cobalt electric furnace from converter slag by lean smelting â†’ cobalt ice copper converter blowing â†’ cobalt-rich hydrazine water quenching â†’ pressurized oxidizing acid leaching â†’ iron removal â†’ solvent extraction separation â†’ cobalt deposition â†’ calcination to produce cobalt oxide. According to the actual situation of cobalt production in China, the main production processes are as follows: (1) using nickel system cobalt slag as raw material, using reduction dissolutionâ†’iron removalâ†’sinking cobaltâ†’calcinationâ†’reduction smeltingâ†’cobalt anode electrorefining to produce electro-cobalt; Process of reduction meltingâ†’iron removalâ†’extraction decontaminationâ†’nickel-cobalt separationâ†’cobalt oxalateâ†’calcination to produce cobalt oxide; process of reduction coagulationâ†’iron removalâ†’extractionâ†’electrowinning production of electrocobalt (2) with cobalt-sulfur concentrate Raw materials, using sulphation roasting â†’ leaching â†’ extraction â†’ electrowinning or cobalt oxide production process. (3) Using arsenic-cobalt ore as raw material, the process of producing cobalt oxide by oxygen roasting, arsenic removal, leaching, extraction of cobalt, cobalt oxalate, and calcination. (4) Using water quenched cobalt-rich strontium as raw material, using oxygen pressure leachingâ†’iron removalâ†’extraction decontaminationâ†’nickel-cobalt separationâ†’sodium oxalate cobaltâ†’calcination to produce cobalt oxide. (5) using cobalt soil as raw material, using electric furnace smeltingâ†’converter blowingâ†’water quenchingâ†’hydrochloric acid leachingâ†’decontaminationâ†’sinking cobaltâ†’calcination to produce cobalt oxide; using fine grindingâ†’sodium sulfite acid leachingâ†’sulfurization precipitationâ†’cobalt sulfide oxidation Leachingâ†’iron removalâ†’extraction and impurity removal, nickel-cobalt separationâ†’cobalt chloride liquid oxalic acid precipitationâ†’calcination to produce refined cobalt oxide.

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November 19, 2021