硫酸氢铵焙烧高钛渣反应动力学

摘要

研究了硫酸氢铵焙烧高钛渣的反应动力学过程，考察钛渣粒度、硫酸氢铵与钛渣质量比和焙烧温度对反应速率的影响，并对反应机理进行分析，建立了反应动力学模型。结果表明：硫酸氢铵焙烧高钛渣提取二氧化钛的动力学过程符合收缩未反应核模型，反应速率受化学反应控制，并由阿罗尼乌斯方程得到焙烧反应的表观活化能为87.95 kJ/mol。%The reaction kinetics of roasting high titanium slag with ammonium bisulfate was studied. The effects of roasting temperature, particle size and NH4HSO4­to­ore mass ratio on the roasting reaction rate were investigated. The mechanisms of the reaction were analyzed, and a model of the reaction kinetics was given. The results show that the roasting process can be modeled with the shrinking core model and the reaction rate is controlled by chemical reaction. According to the Arrhenius expression, the apparent activation energy of the roasting reaction is 87.95 kJ/mol.