【摘要】 赤泥是对铝土矿进行氧化铝提取而产生的强碱性固体废弃物。赤泥脱钠是赤泥污染防治及其资源化再利用的关键，利用氯化镁配制人工模拟海水对赤泥脱钠进行条件实验研究，结果表明，在液固比恒定100 mL/g、人工模拟海水中氯化镁浓度0.64%一定的条件下，体系温度50℃、浸取交换时间10 h,赤泥脱钠率达24.26%;利用人工模拟海水多次重复洗脱赤泥，脱钠效果显著提高，三次洗脱脱钠率达65.09%,得到了人工模拟海水用于赤泥脱钠较好的实验条件，说明利用人工模拟海水对赤泥脱钠是可行的，为赤泥的污染防治和资源化开发利用提供了思路。更多还原

【Abstract】 Red mud is a strong alkaline solid waste produced by alumina extraction from bauxite. Sodium removal from red mud is the key to pollution control and resource reuse of red mud. An experimental study on the condition of sodium removal from red mud is carried out by preparing artificial seawater with magnesium chloride. The results show that under the conditions of a constant liquid-solid ratio of 100 mL/g and 0.64% magnesium chloride concentration in simulated seawater, the removal rate of sodium from red mud reaches 24.26% at a temperature of 50 ℃ and a leaching time of 10 h. In addition, the effect of sodium removal was significantly improved by using artificial seawater to elute red mud repeatedly. This provides a way for pollution control and resource development and utilization of red mud. A good experimental condition for sodium removal of red mud by artificial simulated seawater is obtained, and artificial simulated seawater is feasible to remove sodium from red mud.更多还原