Evaporation Removal of Boron from Metallurgical-Grade Silicon Using CaO-CaCl2-SiO2 Slag

被引：38
作者：
Wang, Ye [1 ]
Ma, Xiaodong [2 ]
Morita, Kazuki [1 ]
机构：
[1] Univ Tokyo, Inst Ind Sci, Meguro Ku, Tokyo 1538505, Japan
[2] Univ Queensland, Sch Chem Engn, St Lucia, Qld, Australia
来源：
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE | 2014年 / 45卷 / 02期
关键词：
SYSTEMS;
D O I：
10.1007/s11663-014-0031-1
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In order to optimize the B removal during slag-refining process for solar-grade silicon production, a new process for the removal of B in molten Si was proposed based on the principle of oxidized chlorination and evaporation. B can be generated and evaporated in the form of B-containing gas on the basis of calculated vapor pressures of forming species in the BO1.5-CaCl2 slag at 1723 K (1450 degrees C). CaO-SiO2-CaCl2 slag was selected to remove B in molten Si. In the slag-refining experiments, compared with the binary systems of CaO-CaCl2 and SiO2-CaCl2 slag, the ternary slag system CaO-SiO2-CaCl2 showed a better potential (86 pct) for B removal. Furthermore, the relationships among the removal efficiency, the estimated evaporative efficiency, and the partition ratio were all discussed. (C) The Minerals, Metals & Materials Society and ASM International 2014
引用
收藏
页码：334 / 337
页数：4
相关论文
共 9 条
  • [1] Performance analysis of photovoltaic systems: A review
    Joshi, Anand S.
    Dincer, Ibrahim
    Reddy, Bale V.
    [J]. RENEWABLE & SUSTAINABLE ENERGY REVIEWS, 2009, 13 (08) : 1884 - 1897
  • [2] Ma X. D., 2013, THESIS U TOKYO, P100
  • [3] Miki T., 1999, THESIS U TOKYO, P100
  • [4] SIMULTANEOUS DETERMINATION OF CL-, BR-, I- AND F- WITH FLOW-INJECTION ION-SELECTIVE ELECTRODE SYSTEMS
    NAJIB, FM
    OTHMAN, S
    [J]. TALANTA, 1992, 39 (10) : 1259 - 1267
  • [5] The Rate of Boron Removal from Molten Silicon by CaO-SiO2 Slag and Cl2 Treatment
    Nishimoto, Hiroshi
    Kang, Youngjo
    Yoshikawa, Takeshi
    Morita, Kazuki
    [J]. HIGH TEMPERATURE MATERIALS AND PROCESSES, 2012, 31 (4-5) : 471 - 477
  • [6] THE ACTIVITY OF CAO IN THE CAO-CACL2 AND CAO-CACL2-CAF2 SYSTEMS
    TAGO, Y
    ENDO, Y
    MORITA, K
    TSUKIHASHI, F
    SANO, N
    [J]. ISIJ INTERNATIONAL, 1995, 35 (02) : 127 - 131
  • [7] Removal of Boron from Molten Silicon Using CaO-SiO2 Based Slags
    Teixeira, Leandro Augusto Viana
    Morita, Kazuki
    [J]. ISIJ INTERNATIONAL, 2009, 49 (06) : 783 - 787
  • [8] Behavior and State of Boron in CaO-SiO2 Slags during Refining of Solar Grade Silicon
    Teixeira, Leandro Augusto Viana
    Tokuda, Yomei
    Yoko, Toshinobu
    Morita, Kazuki
    [J]. ISIJ INTERNATIONAL, 2009, 49 (06) : 777 - 782
  • [9] Yoshikawa T., 2005, THESIS U TOKYO, P16
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