Abstract

In this paper, 3D dual impeller stirring tank was used as a model to simulation combine with experiments to explore the acid leaching kinetics of high-calcium and -silicon manganese ores. The effects of stirring speed, temperature, and aeration rate on the spatial distribution of gas and liquid phases were investigated, and the influence of the gas phase on the flow state was further explored by using CFD (Computational Fluid Dynamics). Meanwhile, the effects of stirring speed, temperature, and aeration rate on the leaching rate of target element manganese were studied by experiments. According to simulations and experiments, stirring speed at 500 rpm perfectly. The aeration rate was 7 m/s, the suitable leaching temperature was 140 °C by experiments. These results also showed that the leaching of high-calcium and -silicon manganese ores follows the control of Interface chemical reaction.The apparent activation energy of the reaction was 43.4 kJ.mol⁻¹.

摘要

本文以3D双叶轮搅拌槽为模型，通过模拟与实验相结合，探讨了高钙硅锰矿的酸浸动力学。研究了搅拌速度、温度和曝气速率对气相和液相空间分布的影响，并利用CFD（计算流体动力学）进一步探讨了气相对流动状态的影响。同时，通过实验研究了搅拌速度、温度和曝气速率对目标元素锰浸出率的影响。根据模拟和实验，搅拌速度在 500 rpm 时完美。曝气速率为7m/s，经实验适宜浸出温度为140℃。^-1。