2012•Hydrometallurgy of ChinaRequires access

New Process of Leaching of Molybdenum and Tungsten From Rough Concentrate of Low-grade Molybdenum Oxidation Ore

Cao Yao

Abstract

Aim at the features of a low-grade molybdenum-tungsten concentrate,the pressure leaching of molybdenum and tungsten was studied.Sodium carbonate was used as leaching regent.Experiment results showed that the optimal leaching temperature was 160℃,the optimal leaching time was 0.5~1.0 hours,the optimal quantity of sodium carbonate was 2.5 times of stoichiometry and the liquid-solid ratio was 1.0~1.5.At the optimal leaching conditions,the molybdenum leaching rate was more than 98% and tungsten leaching rate was about 97%.

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Key concepts: Leaching (pedology), Molybdenum, Tungsten, Sodium carbonate, Lixiviant, Metallurgy, Chemistry, Sodium