铝钙渣硫酸浸出提铝研究

来源期刊：有色金属科学与工程2011年第4期

论文作者：吴宋超 杨玲 赖华生

文章页码：21 - 25

关键词：铝钙渣；硫酸铝；硫酸；浸出

Key words：Al-Ca residue; aluminum sulfate; sulfuric acid; leaching

摘    要：

采用硫酸酸浸铝钙渣提铝，主要研究浸出过程中各工艺因素对铝浸出率的影响，用32%～33%浓度的硫酸浸出铝钙渣，较佳的浸出工艺条件为：浸出温度为50℃，浸出时间为45 min，液固比为4:1为提高铝浸出率以及制取的硫酸铝溶液同时满足后序工序的要求，采用三级逆流浸出，并适当调整工艺参数，进行综合条件实验，获得铝的浸出率为98.48%，浸出液的pH为3.5、硫酸铝浓度为163.4 g/L.

Abstract:

This paper studies aluminum leaching by sulfate acid from Al-Ca residue. The optimum conditions of leaching are obtained. The optimal conditions are adjusted by 3 stages counter-current extracting to improve extracting yield. The aluminum sulfate solution produced meet the requirements of the following operation. The optimal extracting yield reaches 98.48%. The pH value of aluminum sulfate solution is controlled at 3.5. The concentration of aluminum sulfate 163.4 g/L.