针对赤泥的硫酸高压浸出液的性质，进行了P204萃取试验研究。通过考察萃取剂体积分数、萃取温度、水相中硫酸浓度等因素对钪、铁萃取分离的影响，得出了最佳萃取条件为萃取温度35℃，水相硫酸浓度4 mol／L，萃取剂体积分数5%，O／A=1∶3，萃取时间15 min，转速230 r／min，10级萃取；在最佳条件下，钪、铁分离效果较好，钪萃取率为92.10%、铁萃取率为1.13%。负载有机相经10级4 mol／L盐酸洗涤，杂质Fe的去除率为97.88%，钪损失率为0.24%；这表明P204能够很好地将萃取原液中的钪与杂质金属铁分离。
In this paper,P204 extraction experimental study is carried out according to the property of the high-pressure sulfuric acid leach solution of red mud.The experiment investigated the influence that different extractant MVF,extraction temperature,and sulfuric acid concentration in water phase have on the extraction separation of scan-dium and iron, and optimum conditions were obtained, namely the extraction temperature of 35 ℃, extraction agent concentration of 5 %,O/A =1∶3,time of 15 min,rotation speed of 230 r/min and 10-stage extraction; under the conditions,the separation effect of scandium and iron is satisfactory with scandium extraction rate of 92.10%and iron extraction rate of 1.13%.After 10-stage cleansing by hydrochloric acid of loaded organic phase,removal rate of iron, as impurity,is 97.88 %and loss rate of scandium is 0.24 %.The results show that P204 is effective in separation of scandium and iron in extraction solutions.
参考文献
| [1] | 朱军;兰建凯.赤泥的综合回收与利用[J].矿产保护与利用,2008(2):52-54. |
| [2] | 薛理珍;李德谦.二（2-乙基已基）膦酸从硫酸溶液中萃取钪（Ⅲ）的机理研究[J].核化学与放射化学,1991(03):163. |
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