H_2SO_4分解富钛精矿的反应动力学

Kinetics of acidolysis of rich titanium concentrate by H_2SO_4

攀钢含钛高炉渣是一种尚待开发利用的钛资源。选用攀钢含钛高炉渣经选择性分离后的富钛精矿为原料 ,以液固异相反应的收缩未反应芯模型研究了硫酸法制取钛白的反应动力学过程。根据搅拌强度和温度对反应的影响判别反应过程为膜扩散控制过程 ;分析了反应速度的温度因素和粒度因素 ,导出了硫酸分解富钛精矿的动力学方程式 ,并按该方程计算得到反应温度在 6 0～ 80℃的活化能为 34.5 9kJ/mol。

The Ti rich blast furnace slag in Panzhihua Steel & Iron Company is a kind of important titanium resource, which is to be used. Selective separation techniques have been applied to treat with the blast furnace slag and get rich titanium concentrate to produce titanium white in our laboratory. The acidification kinetics of reaction of TiO 2 rich concentrate with H 2SO 4 was investigated. The controlling step was judged as membrane diffusion controlled step. Temperature and sizes factors that influence reaction rate were analyzed. The kinetic equation of dissolution reaction for H 2SO 4 and the rich titanium concentrate was found. The active energy within 60～80?℃ was also obtained to be 34.59?kJ/mol. [