Electric-oxidation extraction of molybdenite concentrate inalkaline NaCl electrolyte

来源期刊：中南大学学报(英文版)2010年第3期

论文作者：曹占芳 钟宏 刘广义 符剑刚 闻振乾 王帅

文章页码：480 - 484

Key words：wet leaching; molybdenite; electric-oxidation; kinetics; dissolution

Abstract: The dissolution of molybdenite concentrate in NaCl electrolyte was investigated. The results show that the dissolution rate increases with the increase in liquid-to-solid ratio, stirring speed, NaCl concentration and temperature. When the liquid-to-solid ratio is 30:1, stirring speed is 400 r/min, concentration of NaCl is 4 mol/L at pH=9 and room temperature, the leaching efficiency of molybdenite concentrate will reach 99.5% in 240 min. Molybdenite concentrate cannot be electro-oxidized directly on the anode. The kinetic studies show that the dissolution of molybdenite concentrate is represented by shrinking core model with diffusion through a porous product layer of element sulfur, and the apparent activation energy for the dissolution reaction is 8.56 kJ/mol.

基金信息：the 11th Five-Year Plan of National Science and Technology of China
the National Natural Science Foundation of China