(1. 上海大學(xué) 上海市鋼鐵冶金重點(diǎn)實(shí)驗(yàn)室，上海 200072;
2. 上海汽車(chē)工業(yè)技術(shù)中心，上海 200040)
摘 要: 冶金硅是生產(chǎn)有機(jī)硅和電子用硅的重要原材料，需精煉處理以降低其中的雜質(zhì)。氧化法是比較有效的精煉除雜法，利用該法時(shí)選擇具有合適密度、粘度、液相線溫度和界面張力的爐渣是保證精煉反應(yīng)順利進(jìn)行的關(guān)鍵。以鈉鈣硅酸鹽玻璃為氧化劑對(duì)冶金硅的脫鋁和脫鈣進(jìn)行了試驗(yàn)。結(jié)果表明冶金硅中的雜質(zhì)鋁鈣去除率最高可達(dá)93.1%和96.4%，鋁和鈣的含量最低降至0.07%和0.025%，達(dá)到了很好的精煉效果。
關(guān)鍵字: 金屬硅；氧化精煉；熱力學(xué)
metallurgical grade silicon
ZHANG Jing-jiang 2
（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
