(东北大学 材料与冶金学院 沈阳 110006)
摘 要: 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60～80 ℃的活化能为34.59 kJ/mol。
关键字: 富钛精矿； 酸解； 钛白； 反应动力学
by H2SO4
（School of Materials and Metallurgy, Northeastern University,
Shenyang 110006， P.R.China）
Abstract: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 TiO2-rich concentrate with H2SO4 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 H2SO4 and the rich titanium concentrate was found. The active energy within 60～80 ℃ was also obtained to be 34.59 kJ/mol.
Key words: Ti-rich concentrate; acidolysis; titanium white; reaction kinetics
