(1. 上海大学 上海市钢铁冶金重点实验室，上海 200072;
2. 上海汽车工业技术中心，上海 200040)
摘 要: 冶金硅是生产有机硅和电子用硅的重要原材料，需精炼处理以降低其中的杂质。氧化法是比较有效的精炼除杂法，利用该法时选择具有合适密度、粘度、液相线温度和界面张力的炉渣是保证精炼反应顺利进行的关键。以钠钙硅酸盐玻璃为氧化剂对冶金硅的脱铝和脱钙进行了试验。结果表明冶金硅中的杂质铝钙去除率最高可达93.1%和96.4%，铝和钙的含量最低降至0.07%和0.025%，达到了很好的精炼效果。
关键字: 金属硅；氧化精炼；热力学
metallurgical grade silicon
（1. Shanghai Enhanced Lab of Ferrometallurgy，Shanghai University,
Shanghai 200072, China;
2. Shanghai Automobile Industry Technology Center，
Shanghai 200040, China）
Abstract:Metallurgical grade silicon is raw materials for organic and electronic uses. The impurities should be reduced through refining treatment，the method of oxidizing is priority now. The physicochemical properties of the system should be emphasized when such method is used. The slag with appropriate density，viscosity，liquidus temperature and inter face tension is key to the refining. The experimental of the removal of aluminum and calcium in silicon metal is done using recycled glass. The results indicate that 93.1% of aluminum and 96.4% of calcium can be removed. The con tents of Al and Ca are lowered to 0.07% and 0.025%.
Key words: silicon；oxidation refining；thermodynamics
