【摘要】 系统研究盐酸浸出赤泥中铝和铁的过程,考察酸浸温度、盐酸浓度、酸浸时间、液固比以及赤泥粒度对铝、铁浸出率的影响。单因素实验和正交实验结果得出,在影响浸出率的酸浸温度、盐酸浓度、酸浸时间和液固比对铁、铝的浸出率的影响几个因素中,酸浸温度和盐酸浓度的影响最大,液固比和浸出时间其次。盐酸酸浸的最佳工艺条件为:赤泥粒度150μm、酸浸温度80℃、盐酸浓度10 mol·L^-1、液固比8∶1（V/m）、浸出时间150 min,此时铝的浸出率为96.7%,铁的浸出率为95.1%,铁铝总浸出率96.0%。更多还原

【Abstract】 The process of extraction of aluminum and iron from red mud by hydrochloric acid leaching was investigated systematically and the effect of leaching temperature,hydrochloric acid concentration,leaching time,liquid-solid ratio and particle size on the process were investigated.The results of single factor test and orthogonal test showed that the leaching temperature,and hydrochloric acid concentration had a significant effect on leaching rate of iron and aluminum,followed by the liquid-solid ratio and leaching time.The optimum conditions for extraction of aluminum and iron from red mud by hydrochloric acid leaching can be determined as the red mud particle size of 150 um,the leaching temperature of 80 ℃,the hydrochloric acid concentration of 10 mol·L^-1,the liquid/solid ratio of 8 ∶ 1（ V/m） and the leaching time of 150 min,under which aluminum leaching rate of96.7%,iron leaching rate of 95.1% and total leaching rate of aluminum and iron of 96.0% were achieved.更多还原