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采用CaO-SiO2-10%CaF2渣系,对工业硅进行造渣除硼研究。研究不同工艺条件下,渣系碱性、反应温度T、渣金比和通气搅拌对硼在渣相和硅液中分配系数LB的影响。结果表明,在1873K下,当CaO/SiO2质量比为2时硼的分配系数可达最大值4.61。在1773～1973K下,lgLB与1/T成线性关系。随着渣金比的增大,硼的分配系数也相应增大,但当渣金比大于3时,硼的分配系数并无明显增加。通气可显著提高硼的去除效果,硼的分配系数随气体中H2O含量的增加而增大。
Using CaO-SiO2-10% CaF2 slag system, industrial silicon for slag removal boron. The effects of slag basicity, reaction temperature T, slag-gold ratio and aeration agitation on the boron partition coefficient LB in the slag phase and the silicon solution were investigated under different technological conditions. The results show that the distribution coefficient of boron reaches to a maximum of 4.61 at 1873 K when the CaO / SiO2 mass ratio is 2. In 1773 ~ 1973K, lgLB and 1 / T into a linear relationship. As the ratio of slag to gold increases, the distribution coefficient of boron increases correspondingly, but when the ratio of slag to gold is more than 3, the distribution coefficient of boron does not increase obviously. Aeration can significantly improve the removal of boron, boron distribution coefficient increases with the increase of gas content of H2O.