对西南稀土矿黑色风化矿泥进行了亚硫酸钠还原浸锰动力学研究，考察了浸出反应温度、矿石粒度对浸出速率的影响，求出了表观活化能为11．0kJ／mol．其浸出过程可用缩核模型描述，属于内扩散控制，其动力学方程为： Manganese reduction kinetics of sodium sulfite reduction was carried out on the black weathering slime in Southwest China rare earth mine. The effects of leaching reaction temperature and ore particle size on the leaching rate were investigated. The apparent activation energy was 11.0kJ / mol. The leaching process can be used to describe the nuclear model, which belongs to the diffusion control, the kinetic equation is: