SiO_(2)-CaO-Al_(2)O_(3)渣剂精炼去除工业硅中铝钙杂质研究  

STUDY ON REMOVAL OF ALUMINUM AND CALCIUM IMPURITIES IN INDUSTRIAL GRADE SILICON BY SiO_(2)-CaO-Al_(2)O_(3) SLAG REFINING

作　　者：翟双东 郑通 庄艳歆 邢鹏飞 ZHAI Shuangdong;ZHENG Tong;ZHUANG Yanxin;XING Pengfei(Key Laboratory of Electromagnetic Processing of Materials,Ministry of Education,Northeastern University,Shenyang 110819,China;School of Metallurgy,Northeastern University,Shenyang 110819,China)

机构地区：[1]东北大学材料电磁过程研究教育部重点实验室,辽宁沈阳110819 [2]东北大学冶金学院,辽宁沈阳110819

出　　处：《铁合金》2021年第2期15-20,共6页Ferro-alloys

基　　金：国家重点研发计划(2018YEC1901805);国家自然科学基金(U1902219)资助。

摘　　要：Al、Ca是工业硅中主要的有害金属杂质,造渣氧化精炼已被证明是一种有效的去除Al、Ca杂质的纯化方法。文章采用SiO_(2)-CaO-Al_(2)O_(3)三元渣剂对工业硅进行氧化精炼试验,通过不断调整渣剂成分、熔炼温度和保温时间等影响因素,确定了除杂的最佳实验条件。试验结果表明:在最佳的造渣氧化精炼条件下,工业硅中的Al、Ca杂质含量分别降至0.039%和0.086%,去除率达到了92.2%和74.6%。该方法不仅可以有效的降低工业硅中的Al、Ca杂质含量,还能同时去除其他的微量杂质,环保节能,适合大规模产业化运用。Aluminum and calcium are the main harmful impurity elements in the industrial grade silicon.Slagging oxidation refining has been proved to be an effective purification method for removing aluminum and calcium impurities.In order to purify the industrial grade silicon,oxidation refining by SiO_(2)-CaO-Al_(2)O_(3) ternary slag was investigated in the paper.The optimum experimental conditions for impurity removal were determined by adjusting the composition of slag,melting temperature and holding time,et al.The results show that under the optimum conditions of slagging oxidation refining,the impurity contents of aluminum and calcium in the industrial grade silicon were reduced to 0.039%and 0.086%respectively,and corresponding removal efficiency got to 92.2%and 74.6%,other trace impurities can be removed at the same time.The impurity purification method is environmentally friendly and energy saving,and suitable for large-scale industrialization.

关 键 词：工业硅 氧化精炼 金属杂质 纯化 

分 类 号：TF646.3.6[冶金工程—钢铁冶金]