三水铝石矿机械活化性能及其动力学

分析了机械活化作用下铝土矿的溶出特点,考察了溶出温度、溶出时间及机械活化转速等对铝土矿直接溶出与机械活化溶出性能效果的影响,并探讨了该过程控制步骤的转化规律.研究结果表明:机械活化作用可有效降低三水铝石型铝土矿的溶出温度及溶出时间,放宽给矿粒度,在装球量为30%,钢弹转速为100 r/min,料球质量比为1.2∶1,溶出温度为150℃,溶出时间为40 min的条件下,矿物中氧化铝的实际溶出率可达85%以上;机械活化作用可大幅度降低扩散控制对三水铝石矿溶出过程的影响.

Influence of Mechanical Activation on Digestion Performance of Hydrargillite

The digestion behavior of alumina from the hydrargillite by the mechanical activation digestion method was investigated.The effects of the mechanical activation stirring speed， digestion temperature and time on the digestion performance of the hydrargillite were examined， and the transformation rules of the process control procedures were also discussed. The results indicated that the mechanical activation effectively reduced the digestion temperature and time of the hydrargillite， and also relaxed the range of raw material sizes. The actual digestion rate of alumina from the hydrargillite reached over 85% under the conditions with digestion temperature of 150℃， the digestion time of 40min， the stirring speed of 100r/min， the ball addition ratio of 30% and the mass ratio of balls to the hydrargillite of 1.2∶1. The mechanical activation can greatly reduce the effect of diffusion control on digestion processes of the hydrargillite.