Removal of iron and aluminum impurities from metallurgical grade-silicon with hydrometallurgical route
A new method for production of solar grade silicon(SoG-Si) at low cost from metallurgical grade silicon (MG-Si) via vacuum metallurgical technique was proposed,which is a promising process to feedstock solar energy silicon material independence of traditional Siemens method.In this procedure,pre-treatment of MG-Si using hydrometallurgical routes to remove the metallic impurities such as iron and aluminum to reduce the production cost is an important process.The influences of acid agents,acid concentration,reaction time and temperature and particle size of raw material ground on the removal efficiency of iron and aluminum impurities were investigated,respectively.The results show that the optimum operation conditions for leaching in acid C are: acid concentration 6 mol/L,temperature 60 ℃,time 4 d,diameter for raw material 50 μm.The removal efficiencies of impurities iron and aluminum are up to 85％ and 75％,respectively.
solar grade silicon metallurgical grade silicon hydrometallurgy purification
YU Zhan-liang MA Wen-hui DAI Yong-nian YANG Bin LIU Da-chun DAI Wei-ping WANG Jin-xian
Faculty of Materials and Metallurgical Engineering,Kunming University of Science and Technology,Kunm Kunming DiBoo Technology Co.,Ltd,Kunming 650093,China
国际会议
2007年国际有色金属大会(International Conference of Nonfereous Materials 2007)(ICNFM)
长沙
英文
2007-11-28（万方平台首次上网日期，不代表论文的发表时间）