中文摘要：

选用A1C13-NaCl-KCl作为电解液，铝硅合金作为阳极、不锈钢作为阴极，恒电流电解条件下实现了多晶硅精炼提纯中硅铝合金的低温分离。结合扫描电子显微镜、X射线衍射仪等检测手段，研究电解温度、电流密度、电解时间等实验参数对电流效率、沉积铝形貌的影响。研究结果表明：在电流密度为50mA／cm2，电解温度200℃，电解时间60min的条件下，Si-50％A1（质量分数，下同）阳极合金经阳极腐蚀后，阴极电极效率达到最大值93．7％，富硅阳极泥中含有90．4％的多晶硅。

英文摘要：

The electrochemical separation of aluminum-silicon alloy in the low temperature molten salt A1C13-NaC1-KC1 at constant current deposition was studied. Aluminum-silicon alloy for the anode e- lectrode and stainless steel for the cathode electrode were used. The effects of temperature, current density and time on the current efficiency and the morphology of deposited aluminum were analyzed by the scanning electron microscope and X-ray diffraction. The results show that, when the current den- sity is 50mA/cmz , the maximum current efficiency can reach 93.7% at 200℃ for 60min using Al（mass fraction） as anode electrode, and there is 90.4% silicon in the anode slime. 50%