盐酸浸出赤泥回收铝的研究  

Study on Aluminum Recovery from Red Mud with Hydrochloric Acid

作　　者：王克勤[1] 王皓[1] 李生虎[1] 

机构地区：[1]太原理工大学材料科学与工程学院,太原030024

出　　处：《有色金属（冶炼部分）》2012年第7期16-18,共3页Nonferrous Metals（Extractive Metallurgy)

基　　金：国家自然科学基金资助项目(21043009);产学研合作项目(2011-39)

摘　　要：研究了盐酸浸出拜耳法赤泥中铝的过程。考察浸出温度、浸出时间、液固比和酸度对铝浸出率的影响,并进行了赤泥回收铝的工业化试验。结果表明,影响铝浸出率的主次因素依次是浸出温度、液固比、盐酸浓度和浸出时间。赤泥在80℃下进行两段浸出,再经蒸发、除钛、除钙、中和及氢氧化钠溶液溶出,铝浸出率为88.13%,回收率为80.26%。The hydrochloric acid leaching process of aluminum from Bayer red mud was studied. The effects of temperature, time, ratio of liquid to solid （L/S） and concentration of hydrochloric acid on aluminum leaching rate were investigated. The industrial experiment of aluminum recovery from red mud was conducted. The results show that factors affecting the rate of aluminum extraction in sequence are temperature, L/S, hydrochloric acid concentration and leaching time. The leaching rate and recovery rate of aluminum from red mud is 88.13% and 80.26% respectively after two-step leached at 80℃, evaporation, de-titanium, de-calcium, neutralization and dissolving with sodium hydroxide solution.

关 键 词：拜耳法 赤泥 铝 盐酸 浸出 回收 

分 类 号：TF821[冶金工程—有色金属冶金] TF111.31