(1. 昆明理工大學(xué) 冶金與能源工程學(xué)院，昆明 650093；
2. 云南冶金集團總公司 技術(shù)中心，昆明 650031)
摘 要: 對鋅還原法過程進(jìn)行了熱力學(xué)分析，研究硅的產(chǎn)率與壓強、溫度以及物料配比的關(guān)系，并給出硅的產(chǎn)率隨著壓強、溫度和物料配比的變化圖，確定該生產(chǎn)過程中主要副反應(yīng)。最后確定鋅還原法的最佳操作條件為溫度控制在1 200 K左右、常壓、物料配比n(Zn)/n(SiCl4)=3。在此條件下，硅的理論產(chǎn)率為86.6%。
關(guān)鍵字: 多晶硅；太陽能電池；鋅還原；熱力學(xué)
（Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology,
Kunming 650093, China;
2. The Technique Center of Yunnan Metallurgy Co., Ltd., Kunming 650031, China）
Abstract:The thermodynamics of zinc reduction process was studied. The relationships among silicon productivity and pressure, temperature and molar ration of reactant were investigated and the diagrams of silicon productivity for different pressures, temperatures and molar ratios of reactants were plotted. Furthermore, the major side-reactions which affect the productive ratio of silicon are decided. Finally, the optimum operation of the reactor is decided. The optimum conditions are as temperature of about 1 200 K, atmospheric pressure and the molar ratio of reactants (n(Zn)/n(SiCl4)) as 3. The silicon theoretical yield is 86.6% under this condition.
Key words: polycrystalline silicon; solar cell; zinc reduction; thermodynamics
