中文摘要：

利用磷酸浸出伴生稀土磷矿,研究了温度、时间、酸度、粒度与稀土浸出动力学的关系。结果表明,升高温度、延长反应时间、增大酸度、减小初始粒度均有利于稀土的浸出。界面化学反应控制为稀土浸出的控制步骤,表观反应级数0.993,表观活化能44.6kJ/mol,稀土浸出过程近似为基元反应。按反应核收缩核模型通过统计分析建立了关联温度、浓度、粒度三因素的稀土浸出数学模型。

英文摘要：

Relationships between kinetics of leaching of REEs from RE-associated phosphate ore and temperature,time,acid concentration and granularity were investigated by phosphoric acid method.The results show that increasing of temperature,time and acid concentration,and reduction of granularity can accelerate leaching of REEs.Leaching process of REEs,close to elementary reaction,is controlled by interfacial chemical reaction with apparent activation energy of 44.6kJ/mol and apparent reaction order of0.993.Kinetics mathematical model of leaching of REES relating to temperature,acid concentration and granularity is established by statistic analysis based on shrinking core model.