硫酸浸取高岭土中氧化铝的动力学研究

Research on the kinetics of alumina from kaolinite leaching in sulphuric acid

以高岭土和硫酸为原料 ,对硫酸浸取高岭土中氧化铝的反应动力学进行了研究。按照收缩未反应芯模型导出了化学反应控制的模型方程 ,并确定了化学反应控制步骤的条件。在化学反应控制条件下进行实验研究 ,结果表明反应过程符合收缩未反应芯模型。测定了反应级数和反应活化能 ,建立了反应动力学方程。

In this paper, the reaction kinetics of alumina from kaolinite leaching in sulphuric acid is studied, while the feed stocks are kaolinite and sulphuric acid. According to shrinking core model, the model equation to be controlled by chemical reaction is deduced and the conditions of its steps are determined. Under the condition to be controlled by chemical reaction, the experiment is made and its result demonstrates that the reaction process is in accordance with shrinking core model. The reaction order and reaction activation energy are determined and the reaction kinetics equation is set up.