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CaO-SiO2熔渣精炼去除冶金级硅中杂质硼
  • ISSN号：1003-6326
  • 期刊名称：中国有色金属学报(英文版)
  • 时间：2014
  • 页码：1231-1236
  • 分类：TG146[金属学及工艺—金属材料;一般工业技术—材料科学与工程;金属学及工艺—金属学]
  • 作者机构：[1]昆明理工大学复杂有色金属资源清洁利用省部共建国家重点实验室/真空冶金国家工程实验室,昆明650093, [2]昆明理工大学云南省有色金属真空冶金重点实验室,昆明650093, [3]昆明理工大学云南省高校硅冶金与硅材料工程研究中心,昆明650093
  • 相关基金：Projects （51104080, u 1137601） supported by the National Natural Science Foundation of China; Project （ 14118557） supported by the Personnel Training Foundation of Kunming University of Science and Technology in China
  • 相关项目：冶金法制备太阳能级多晶硅中的真空精炼研究
作者： Ma, Wen-hui|Wei, Kui-xian|Yang, Bin|Dai, Yong-nian|
关键词： 冶金级硅, 除硼, 热力学, 分配系数, 熔渣精炼, metallurgical grade silicon, boron removal, thermodynamics, distribution coefficient, slag refining
中文摘要：

利用 CaO-SiO2熔渣去除冶金级硅（MG-Si）中的杂质硼。热力学分析和实验结果表明：纯 SiO2基本上不能去除冶金级硅中的杂质硼。通过建立硼的分配系数与熔渣中 SiO2和 CaO 活度之间的关系，从热力学上对CaO-SiO2熔渣的除硼能力进行表征。结果表明：随着渣中CaO配比的升高，硼的分配系数和去除效率大大提高。当熔渣组成为60%CaO-40%SiO2（质量分数）时，硼的分配系数达到最大值1.57。当渣硅比为2.5，精炼温度为1600℃以及精炼时间为3 h时，利用60%CaO-40%SiO2熔渣可以将冶金级硅中的硼含量从18×10^-6降低至1.8×10^-6，去除效率达到90%。

英文摘要：

Boron removal from metallurgical grade silicon （MG-Si） using a calcium silicate slag was studied. The results show that it is impossible basically to remove boron using a pure SiO2 refining. The oxidizing ability of CaO-SiO2 slag for boron removal was characterized by establishing the thermodynamic relationship between the distribution coefficient of boron （LB） and the activities of SiO2 and CaO. The experimental results show that the distribution coefficient and the removal efficiency of boron are greatly improved with the increase of CaO proportion in the slag. The maximal value of LB reaches 1.57 with a slag composition of 60%CaO-40%SiO2 （mass fraction）. The boron content in the refined silicon is reduced from 18×10^-6 to 1.8×10^-6 using slag refining at 1600 ℃ for 3 h with a CaO-SiO2/MG-Si ratio of 2.5, and the removal efficiency of boron reaches 90%.

同期刊论文项目
冶金法制备太阳能级多晶硅中的真空精炼研究
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期刊信息
  • 《中国有色金属学报：英文版》
  • 中国科技核心期刊
  • 主管单位:中国科学技术协会
  • 主办单位:中国有色金属学会
  • 主编：黄伯云
  • 地址：中国长沙中南大学
  • 邮编：410083
  • 邮箱：f-xsxb@csu.edu.cn
  • 电话：0731-88830949
  • 国际标准刊号：ISSN：1003-6326
  • 国内统一刊号：ISSN：43-1239/TG
  • 邮发代号:42-317
  • 获奖情况:
  • 国家“双百”期刊,第二届全国优秀科技期刊评比二等奖,中国有色金属工业总公司优秀科技期刊一等奖
  • 国内外数据库收录:
  • 俄罗斯文摘杂志,美国化学文摘（网络版）,荷兰文摘与引文数据库,美国工程索引,美国剑桥科学文摘,美国科学引文索引（扩展库）,英国科学文摘数据库,日本日本科学技术振兴机构数据库,中国中国科技核心期刊
  • 被引量:1159