轻稀土萃取分离皂化废水回用配制皂化剂

Preparation of Saponifier by Reusing Saponification Wastewater from Light Rare Earth Extraction Separation

轻稀土萃取分离产生的皂化废水直接回用配制皂化剂,根据这些废水中含氯化钠浓度、含有的微量稀土离子不同,同时根据轻稀土元素萃取分离的纯度要求回用皂化废水,结果表明:回用皂化废水降低了废水排放量,节省了新水,提高废水中氯化钠的浓度,降低浓缩、结晶回收氯化钠能源消耗,同时提高了稀土收率、降低有机消耗。

The saponifier was prepared by reusing the saponification wastewater from light rare earths extraction separa- tion. The saponification wastewater was reused according to sodium chloride concentration and different trace rare earth ions in it and the requirement purity of light rare earth elements extraction separation. The results show that the discharge quantity of the wastewater was decreased and fresh water was saved and the concentration of sodium chloride in th wastewater was in- creased by resuihg saponification wastewater. And the energy consumption was reduced in the concentration and crystallization of recycing sodium chloride,and the yield of rare earths was improved, and the consumption of organic was reduced.