Study on Roasting Decomposition of Mixed Rare Earth Concentrate in CaO-NaCl-CaCl2
来源期刊：JOURNAL OF RARE EARTHS2006年增刊第2期
论文作者：Sun Shuchen Bian Xue Wu Wenyuan Tu Ganfeng
Key words：mixed rare earth concentrate; roasting; CaO-CaCl-CaCl2;
Abstract: The decomposed process of bastnaesite, monazite and mixed rare earth concentrate in CaO-CaCl-CaCl2 was studied by means of TG-DTA method. The relationship among decomposition ratio, roasting temperature, and CaO-NaCl addition was studied by the quadratic regression orthogonal analysis, and then the regression equation was obtained. Through analysis, the optimum process conditions of mixed rare earth concentrate decomposed by CaO-CaCl-CaCl2 were obtained as follows: roasting temperature: 700 ℃, CaO addition: 15%, NaCl-CaCl2 addition: 10%, roasting time: 60 min, the decomposition ratio: 91.3%.
Sun Shuchen1，Bian Xue1，Wu Wenyuan1，Tu Ganfeng1
(1.School of Materials & Metallurgy, Northeastern University, Shenyang 110004, China)
Abstract:The decomposed process of bastnaesite, monazite and mixed rare earth concentrate in CaO-CaCl-CaCl2 was studied by means of TG-DTA method. The relationship among decomposition ratio, roasting temperature, and CaO-NaCl addition was studied by the quadratic regression orthogonal analysis, and then the regression equation was obtained. Through analysis, the optimum process conditions of mixed rare earth concentrate decomposed by CaO-CaCl-CaCl2 were obtained as follows: roasting temperature: 700 ℃, CaO addition: 15%, NaCl-CaCl2 addition: 10%, roasting time: 60 min, the decomposition ratio: 91.3%.
Key words:mixed rare earth concentrate; roasting; CaO-CaCl-CaCl2;
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