Composition of off-gas produced by combined fluidized bed chlorination for preparation of TiCl_4  

作　　者：熊绍锋 袁章福 徐聪 席亮 

机构地区：[1]State Key Laboratory of Multiphase and Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences [2]Department of Energy and Resources Engineering, College of Engineering, Peking University [3]Graduate University of Chinese Academy of Sciences [4]Institute of Nuclear and New Energy Technology, Tsinghua University

出　　处：《中国有色金属学会会刊：英文版》2010年第1期128-134,共7页Transactions of Nonferrous Metals Society of China

基　　金：Project(2008AA06Z1071) supported by the High-tech Research and Development Program of China;Project(20306030) supported by the National Natural Science Foundation of China

摘　　要：The effects of carbon/slag molar ratio, chloride amount and temperature on equilibrium molar ratio (REq) of CO to CO2 for off-gas produced by carbochlorination of titanium slag were firstly investigated by thermodynamic calculation of equilibrium components of off-gas. The experimental CO/CO2 molar ratio (REx) was then obtained to be 0.2-0.3 by the carbochlorination experiment using a novel combined fluidized bed as chlorination reactor. To further investigate the reaction effect of the novel process mentioned above, REx, REq and corresponding reference data (RRe) were compared. The results indicate that REx is similar to RRe (0.5-1.2) but different from REq (≥4.3), which is consistent with anticipation of REx for the novel combined fluidized bed. The difference between REx and corresponding REq is mainly attributed to short retention time (about 1 s) of materials in combined fluidized bed and carbochlorination of oxide impurities contained in titanium slag, such as CaO, MgO and SiO2.The effects of carbon/slag molar ratio, chloride amount and temperature on equilibrium molar ratio （REq） of CO to CO2 for off-gas produced by carbochlorination of titanium slag were firstly investigated by thermodynamic calculation of equilibrium components of off-gas. The experimental CO/CO2 molar ratio （REx） was then obtained to be 0.2-0.3 by the carbochlorination experiment using a novel combined fluidized bed as chlorination reactor. To further investigate the reaction effect of the novel process mentioned above, REx, REq and corresponding reference data （RRe） were compared. The results indicate that REx is similar to RRe （0.5-1.2） but different from REq （≥4.3）, which is consistent with anticipation of REx for the novel combined fluidized bed. The difference between REx and corresponding REq is mainly attributed to short retention time （about 1 s） of materials in combined fluidized bed and carbochlorination of oxide impurities contained in titanium slag, such as CaO, MgO and SiO2.

关 键 词：四氯化钛 流化床 CO2气体 热氯化反应器 煤气 生产 编写 组成 

分 类 号：O614.411[理学—无机化学]