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Electric‐oxidation kinetics of molybdenite concentrate in acidic NaCl solution
Author(s) -
Zhanfang Cao,
Hong Zhong,
Guangyi Liu,
Jiangang Fu,
Shuai Wang,
Yunren Qiu
Publication year - 2009
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.20237
Subject(s) - dissolution , kinetics , electrolyte , activation energy , molybdenite , chemistry , leaching (pedology) , diffusion , inorganic chemistry , nuclear chemistry , analytical chemistry (journal) , materials science , metallurgy , thermodynamics , chromatography , electrode , physics , quartz , environmental science , quantum mechanics , fluid inclusions , soil science , soil water
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: $k = 0.0207{\rm C}_{{\rm NaCl}}^{1.04} {\rm exp}( - 8200/RT)$ .