有色金属科学与工程2018，Vol.9Issue(2)：109-114,6.DOI:10.13264/j.cnki.ysjskx.2018.02.018
纳滤浓缩稀土母液沉淀上清液的实验研究
Experimental study on precipitating supernatant of rare earth mother liquor by nanofiltration
摘要
Abstract
The supernatant of rare earth mother solution obtained from the leaching of a rare earth company in Ganzhou is treated by the supernatant after NH4HCO3removal of impurity.The concentration efficiency of rare earth ions in the raw liquid by nanofiltration and the separation and recovery of NH3-N are mainly studied, so as to provide reference for industrial application.The experimental results showed that when the concentration of rare earth ions in the raw liquor was 142.9 mg/L and the concentration of ammonia nitrogen was 346.1 mg/L, the retention rate of rare earth ions in the concentrated liquid side reached 95 % when the operation pressure was 0.8 MPa, the influent pH was 6.49, and the running temperature was 25 degrees. The intercepting rate of impurity ions, such as Ca2+, Mg2+, Mn2+and Zn2+, can reach 75 %~90 %. The ammonia nitrogen through the liquid side is about 60 % of the original concentration. When the supernatant of the rare earth mother solution of 6.0 L is concentrated to 0.6 L, the concentration of RE3+is increased to 1 242.0 mg/L, and the concentration is nearly 8.69 times.关键词
纳滤/浓缩富集/稀土离子/氨氮Key words
nanofiltration/concentration and enrichment/rare earth ion/ammonia分类
化学化工引用本文复制引用
罗智江,李丹,沈存花,余夏静,游亚杰,钟常明..纳滤浓缩稀土母液沉淀上清液的实验研究[J].有色金属科学与工程,2018,9(2):109-114,6.基金项目
江西省教育厅青年基金资助项目(GJJ4451) （GJJ4451）
