肯尼亚天然金红石矿流化床氯化率的研究  

Fluidized-Bed Chlorination Rates of Kenya Rutile Ore

作　　者：牛丽萍[1,2] 张廷安[1,2] 倪培远[1,3] 王文博[1,2] 吕国志[1,2] 周爱平[1,2] 

机构地区：[1]东北大学,辽宁沈阳110819 [2]多金属共生矿生态化利用教育部重点实验室,辽宁沈阳110819 [3]瑞典皇家工学院,瑞典斯德哥尔摩se10044

出　　处：《稀有金属材料与工程》2014年第6期1377-1380,共4页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(51374064;51004033;51074044;57304043)

摘　　要：对肯尼亚金红石矿加碳氯化体系的热力学和动力学进行了研究,分析表明,C在固相中过量,体系处于平衡态时,TiCl4和CO是仅有的2个稳定的产物,增加C/TiO2比对产物组成影响不大;高温时,TiO2与C和Cl2生成CO的方程是占主导地位的。本实验提出了一个反应速率模型,得到金红石氯化率的公式,与实验数据吻合较好。反应速率与颗粒初始半径和天然金红石密度有关,在900℃到1000℃温度范围内,表观活化能为10.569 kJ/mol,扩散是反应的主要控制步骤。得到了C-Cl2体系中氯气反应率表达式,氯气反应率取决于反应程度、氯气浓度和焦炭粒径。The thermodynamics and kinetics of natural rutile carbochlorination have been investigated in a fluidized-bed. Thermodynamic analysis of this system reveals that when C is excess in the solid phase, TiCl4 and CO are the only two stable products in the chemical equilibrium compositions system, and the increase of the ratio of C to TiO2 has little effect on the product composition. At high temperature, the reaction with CO as the product is the dominant reaction. This paper proposed a reaction rate model, and got a rutile chlorination rate formula, which is more consistent with experimental data. For the TiO2-C-Cl system, the reaction rate is dependent on both size and density of natural rutile. From 900 to 1000 ℃, the apparent activation energy is 10.569 kJ/mol. In this temperature range, mass diffusion is the main reaction controlling step. The expression of the chlorine reaction rate in the-C-C12 system was obtained, and it depends on the degree of reaction, Cl2 concentration and the size of coke.

关 键 词：天然金红石 气-固反应 流化床 加碳氯化 颗粒 

分 类 号：TQ164[化学工程—高温制品工业]