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%。%The distribution coefficient (LB) of boron between CaO−SiO2−BaO−CaF2 slag and silicon was investigated using electromagnetic induction melting for the purpose of improving the boron removal fraction. The dependence of the boron distribution coefficient between slag and silicon on the fundamental parameters of CaO to SiO2 mass ratio and refining time and the additions of BaO and CaF2 to the slag was discussed. The results show that LB can be increased by adding BaO and CaF2 to CaO−SiO2 slag. The maximum value of LB (6.94) is obtained when the CaO to SiO2 mass ratio is 1.1:1 and the contents of BaO and CaF2 are fixed at 15% and 20%, respectively. Increasing the refining time increases the LB. After the slag treatment is performed twice, the boron content of the silicon is successfully reduced from 3.5×10−5 to 3.7×10−6, and the removal fraction of boron reaches 89.4%.
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