CAJ | 학술논문

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1 873 K下,当CaO/SiO2质量比为2时硼的分配系数可达最大值4.61.在1 773～1 973 K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.
채용CaO-SiO2 - 10% CaF2사계,대공업규진행조사제붕연구.연구불동공예조건하,사계감성、반응온도T、사금비화통기교반대붕재사상화규액중분배계수LB적영향.결과표명,재1 873 K하,당CaO/SiO2질량비위2시붕적분배계수가체최대치4.61.재1 773～1 973 K하,lgLB여1/T성선성관계.수착사금비적증대,붕적분배계수야상응증대,단당사금비대우3시,붕적분배계수병무명현증가.통기가현저제고붕적거제효과,붕적분배계수수기체중H2O함량적증가이증대.
The removal of boron from metallurgical silicon in slag system of CaO-SiO2-10％CaF2 was investigated.The partition coefficient of boron (LB) between slag and silicon phase was studied under different conditions of slag basicity (CaO/SiO2 ratio),temperature,mass ratio of slag to silicon and gas blowing.The results show that LB has a maximum value of 4.61 when the CaO/SiO2 mass ratio is around 2 at 1 873 K.The logarithm of LB is linear to the reciprocal of temperatures in the range of 1 773-1 973 K.LB increases with the increase of mass ratio of slag to silicon,but it does not increase markedly when the ratio excesses 3.Gas blowing can significantly increase the removal of boron,and LB increases with the increase of water vapor content.