Title of article
Chlorination kinetics of fluorine-fixed rare earth concentrate
Author/Authors
Zhu، نويسنده , , G and Chi، نويسنده , , R and Shi، نويسنده , , W and Xu، نويسنده , , Z، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2003
Pages
4
From page
671
To page
674
Abstract
Extraction of rare earth elements from bastnasite (REFCO3) and monazite (REPO4) after fluorine fixation was studied. Chlorination kinetics of fluorine-fixed flotation bulk concentrate with ammonium chloride was found to follow the regional reaction model. The chlorination was found to involve two series steps with nuclear growth occurred in normal to surface direction. Internal diffusion was identified to be the rate limiting step of the chlorination process and an apparent activation energy of 36.8 kJ mol was determined.
Keywords
Leaching , Reaction kinetics , Roasting , Extractive metallurgy
Journal title
Minerals Engineering
Serial Year
2003
Journal title
Minerals Engineering
Record number
2274037
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