| Stepwise Chlorination-Chemical Vapor Transport Reactions for Bastnaesite Concentrate |
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| 引用本文： | 张丽清,王军,范世华,雷鹏翔,王之昌. Stepwise Chlorination-Chemical Vapor Transport Reactions for Bastnaesite Concentrate[J]. 中国稀土学报(英文版), 2002, 20(1): 56-60 |
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| 作者姓名： | 张丽清 王军 范世华 雷鹏翔 王之昌 |
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| 作者单位： | DepartmentofChemistry,NortheasternUniversity,Shenyang110006,China |
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| 基金项目： | theNationalNaturalScienceFoundationofChina ( 5 98740 0 8) |
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| 摘 要： | Vapor phase extraction and mutual separation of rare earth (RE) elements from bastnaesite concentrate were investigated using stepwise chlorination-chemical vapor transport reactions mediated by vapor complexes LnAlnC13n 3(Ln = RE elements). The bastnaesite was heated to 800 K and chlorinated between 800- 1300 K with ,C C12 SiClr to remove CO2, SiF4 and high volatile chlorides. At the temperature of 1300 K for 6 h, the resulted RE chlorides were chemically transported and mutual separated with the vapor complexes while CaC12 and BaC12 were remained in the residues. Significantly different CVT characteristics were observed for gradually decreased and wave form temperature gradients.
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| 关 键 词： | 稀土 氟碳铈矿 富集 氯化处理 传质 CVT |
Stepwise Chlorination-Chemical Vapor Transport Reactions for Bastnaesite Concentrate |
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| Zhang Liqing,Wang Jun,Fan Shihua,Lei Pengxiang,Wang Zhichang. Stepwise Chlorination-Chemical Vapor Transport Reactions for Bastnaesite Concentrate[J]. Journal of Rare Earths, 2002, 20(1): 56-60 |
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| Authors: | Zhang Liqing Wang Jun Fan Shihua Lei Pengxiang Wang Zhichang |
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| Abstract: | Vapor phase extraction and mutual separation of rare earth (RE) elements from bastnaesite concentrate were investigated using stepwise chlorination-chemical vapor transport reactions mediated by vapor complexes LnAlnCl3n+3 (Ln=RE elements). The bastnaesite was heated to 800 K and chlorinated between 800～1300 K with C+Cl2+SiCl4 to remove CO2, SiF4 and high volatile chlorides. At the temperature of 1300 K for 6 h, the resulted RE chlorides were chemically transported and mutual separated with the vapor complexes while CaCl2 and BaCl2 were remained in the residues. Significantly different CVT characteristics were observed for gradually decreased and wave form temperature gradients |
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| Keywords: | rare earths bastnaesite concentrate chemical vapor transport RE vapor complexes LnAl n Cl 3 n +3 |
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