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CaO-SiO2-BaO-CaF2四元渣去除熔硅中的硼杂质

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Indexed by:期刊论文

Date of Publication:2016-12-01

Journal:中国有色金属学报(英文版)

Included Journals:SCIE、EI、ISTIC、CSCD、Scopus

Volume:26

Issue:12

Page Number:3299-3304

ISSN No.:1003-6326

Key Words:冶金级硅;除硼;CaO-SiO2-BaO-CaF2

Abstract:为提高硼的去除率,研究了电磁感应精炼过程中硼杂质在 CaO?SiO2?BaO?CaF2四元渣和熔硅之间的分配系数 LB,讨论了四元渣系中 CaO/SiO2质量比、BaO 和 CaF2含量、熔炼时间对 LB 的影响规律。结果表明:随着 CaO?SiO2渣中 BaO 和 CaF2含量的增大,LB 值增大。当 CaO/SiO2质量比为1.1:1、BaO 和 CaF2含量分别为15%和20%时,CaO?SiO2?BaO?CaF2四元渣去除熔硅中硼杂质效果最好,LB 达到最大值6.94,并且 LB 随着熔炼时间的延长而增大。经过两次造渣后,熔硅中硼含量由3.5×10?5降到3.7×10?6,硼的去除率达到89.4%。

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