Preparation of TiCl4 with the Titanium Slag Containing Magnesia and Calcia in a Combined Fluidized Bed  

组合式流化床中以高钙镁钛渣为原料制取TiCl4

作　　者：徐聪 袁章福 王晓强 

机构地区：[1]Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100080, China [2]Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China

出　　处：《Chinese Journal of Chemical Engineering》2006年第3期281-288,共8页中国化学工程学报（英文版）

基　　金：Supported by the National Natural Science Foundation of China （No.20306030） and China Postdoctoral Science Foundation （No.2003033240）.

摘　　要：This paper describes a new method for producing TiCl4 by chloridizing materials of high content CaO and MgO, in which a combined fluidized bed is used as a reactor to avoid agglomeration between particles caused by molten CaCl2 and MgCl2. The combined fluidized bed consists of at least a riser tube and a semi-circulating fluidized bed. Two kinds of high titanium slag, in which the total mass content of CaO and MgO is 2.03% and 9.09% respectively, are employed to examine the anti-agglomeration effect and the conversion of the materials when the temperature ranges are between 923.15K and 1073.15K, gas apparent velocity 0.7--1.1m.s-1, and inlet amount of solid materials is 4.6-7.0kg·h^-1. It is found that the anti-agglomeration effect in the combined fluidized bed is satisfactory and the new method can achieve a TiCl4 production capacity of 14.0-75.4t·m^-2·d^-1 in relation to 25.0-- 40.0t·m^-2·d^-1 from the conventional bubble bed. Furthermore, low-temperature chloridization, for example, at 923K or 973K, can also be used to produce TiCl4 and avoid agglomeration.

关 键 词：titanium tetrachloride titanium slag combined fluidized bed calcium oxide magnesium oxide 

分 类 号：TQ134.11[化学工程—无机化工]