✦ LIBER ✦

Electric-oxidation kinetics of molybdenite concentrate in acidic NaCl solution

✍ Scribed by Cao Zhan-fang; Zhong Hong; Liu Guang-yi; Fu Jian-gang; Wang Shuai; Qiu Yun-ren

Publisher: John Wiley and Sons
Year: 2009
Tongue: English
Weight: 124 KB
Volume: 87
Category: Article
ISSN: 0008-4034
DOI: 10.1002/cjce.20237

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✦ Synopsis

Abstract

The electric‐oxidation kinetics of molybdenite concentrate in NaCl electrolyte was investigated in this study. The effects of liquid‐to‐solid ratio, stirring speed, and concentration of NaCl on the dissolution rate were determined. It was found that the dissolution rate increases with increase in liquid‐to‐solid ratio, stirring speed, and concentration of NaCl. A shrinking particle model is presented to describe the dissolution and to analyse the data. The apparent activation energy of this dissolution process was found to be 8.2 kJ/mol; it was established that the leaching process is mainly controlled by diffusion, and the kinetics formula of this research system can be expressed as: $k = 0.0207{\rm C}_{{\rm NaCl}}^{1.04} {\rm exp}( - 8200/RT)$.

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