2013•Mining and MetallurgyRequires access

STUDY ON ACID-LEACHING AND ELECTROWINNING PROCESS OF A MANGANESE CARBONATE ORE

Liu Da-xu

Abstract

Acid-leaching and electrowinning process on a manganese carbonate ore from Chongqing was studied. Effects of ore particle size,acid / ore ratio,leaching temperature and time on leaching rate of manganese were investigated and leaching-electrowinning cycle test was conducted. Results showed that under an optimum leaching condition as: particle size of 90% of-0. 15mm,acid/ore ratio of 0. 6,leaching temperature of 60 ℃,L/S ratio of8∶ 1,and leaching time of 4h,leaching rate of manganese could reach 91. 89%,and a cathode manganese product with Mn≥99. 8% could be steadily obtained. Leaching rate of manganese was around 90% when anolyte recycled to leaching circuit.

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Key concepts: Leaching (pedology), Manganese, Electrowinning, Metallurgy, Lixiviant, Carbonate, Sulfuric acid, Chemistry