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Meeting 2020 TMS Annual Meeting & Exhibition
Symposium Characterization of Minerals, Metals and Materials
Presentation Title Effect of Pre-Treatment During Leaching of High Iron, Cobalt Containing Ore
Author(s) Yotamu Hara, Douglas Mazwi Musowoya, Golden Kaluba, Choolwe Muchindu, Haggai Simfukwe
On-Site Speaker (Planned) Yotamu Hara
Abstract Scope Nama Ore contains about 0.3% copper, 0.5% cobalt and 60% iron. Mineralogical examination using scanning electron microscopy (SEM) technique showed that copper and cobalt are chemically dissolved in rich iron matrix and in the heterogenite mineral phase. Direct leaching of this ore result in the following problems; (i) high acid consumption, (ii) high SMBS consumption and (iii) produces sulphur containing leach residue due to the presence of jerosite and, (iv) contaminated leach liquor due to presence of dissolved sodium sulphate. The three problems were overcome by pre-treatment of the ore via carbothermic reduction followed by leaching. The effects of pre-treatment temperature and pH of solution during leaching were determined. Under optimal conditions, recoveries of copper and cobalt of more than 90 %. The leach residue produced by this method is free from sulphur such that it can be used for production of pig iron, thereby lowering the waste disposal problem.
Proceedings Inclusion? Planned:

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