摘要
针对北方混合轻稀土矿占比2%的中重稀土,研究铝含量、溶液浓度、沉淀方式等对钐铕钆碳酸盐的晶核形成及长大过程的影响。最佳生产工艺条件为:稀土浓度200g/L、铝含量0.018g/L的钐铕钆溶液加入50%晶种、正液沉淀。沉淀由Sm2(CO3)3·2.85H2O、Eu2(CO3)3·3H2O、Gd2(CO3)3·3H2O组成的非晶型钐铕钆碳酸盐,铝含量低于0.02g/L可消除铝水解的影响,得到的钐铕钆碳酸盐晶粒尺寸大、晶化程度高,易于过滤。
To address northern mixed light rare earths accounting for 2%of medium and heavy rare earths,effects of aluminum content,solution concentration,precipitation mode on formation and growth of crystal nucleus of Sm-Eu-Gd(SEG)carbonate were investigated.The results show that sediment is composed of Sm2(CO3)3·2.85 H2O,Eu2(CO3)3·3 H2O and Gd2(CO3)3·3 H2O under the conditions including rareearth concentration of 200 g/L,aluminum content of 0.018 g/L in SEG solution,crystal seed of 50%,and forward precipitation.Effect of aluminum hydrolysis can be eliminated if aluminum content is lower than 0.02 g/L,resulting in large size,high degree of crystallization,and easy filtration of Sm-Eu-Gd carbonate grains.
作者
郭晖
柳召刚
王平
张文斌
张永华
GUO Hui;LIU Zhao-gang;WANG Ping;ZHANG Wen-bin;ZHANG Yong-hua(College of Material and Metallurgy,Inner Mongolia University of Science&Technology,Baotou 014010,Inner Mongolia,China;Smelting Branch of North China Rare Earth(Group)Hi-Tech Co.,Ltd.,Baotou 014010,Inner Mongolia,China)
出处
《有色金属（冶炼部分）》
CAS
北大核心
2020年第3期66-70,共5页
Nonferrous Metals（Extractive Metallurgy)
基金
国家自然科学基金资助项目(51634005)。
关键词
铝
钐
铕
钆
沉淀
aluminum
samarium
europium
gadolinium
precipitation
