离子型稀土矿抑杂浸出中抑铝剂的研究

来源期刊：有色金属科学与工程2012年第3期

论文作者：万夕辉 朱冬梅 邱廷省 伍红强

文章页码：51 - 55

关键词：风化壳淋积型稀土矿；浸出；抑铝剂；碳酸氢铵

Key words：weathered crust elution-deposited rare earth ore; leaching; aluminum inhibitor; ammonium bicarbonate

摘    要：研究了在抑杂浸出过程中添加抑铝剂对稀土浸出的影响，筛选出了适宜的抑铝剂所筛选出的抑铝剂能适应于我国南方不同类型离子型稀土矿，抑铝剂的添加几乎不影响稀土的浸出率通过抑杂浸出得到的浸出液中铝离子含量小于2 mg/L，去除率达到98%以上，铁离子含量小于0.3 mg/L，该浸出液无需净化直接用碳酸氢铵沉淀得到的碳酸沉淀稀土符合生产质量要求稀土产品质量达到国内现行标准，有效地简化了生产流程，并能减少5%~15%的稀土损失。

Abstract: Aluminum inhibitors, which are suitable for the ion-typed rare earth in South China, were added as leaching agents in the leaching process of the weathered crust elution-deposited rare earth. The adding of inhibitors affects little on the RE leaching rate. The leaching solution (Al³⁺< 2 mg/L, Fe³⁺< 0.3 mg/L) was obtained with the impurity removal rate reaching 98 %. The leaching solution was precipitated by ammonium bicarbonate without purification process. The carbonated RE is corresponding to national quality requirements. The technology effectively simplify the production process for reducing RE loss by 5 %~15 %.