用碳酸氢铵沉淀法制备大颗粒氧化铈试验研究  

Preparation of Large Particles of Cerium Oxide by Ammonium Bicarbonate Precipitation

作　　者：乔军[1] 张升强 王新宇 侯睿恩 王哲[1] 马莹[1] 崔建国[1] 杨启山[2] QIAO Jun;ZHANG Shengqiang;WANG Xinyu;HOU Ruien;WANG Zhe;MA Ying;CUI Jianguo;YANG Qishan(National Key Laboratory of Baiyunobo Rare Earth Resource Researches and Comprehensive Utilization,Baotou Research Institute of Rare Earths,Baotou 014030,China;Collage of Chemistry and Chemistry Engineering,Inner Mongolia University of Science and Technology,Baotou 014010,China)

机构地区：[1]包头稀土研究院白云鄂博稀土资源研究与综合利用全国重点实验室,内蒙古包头014030 [2]内蒙古科技大学化学与化学工程学院,内蒙古包头014010

出　　处：《湿法冶金》2023年第6期628-637,共10页Hydrometallurgy of China

摘　　要：研究了以碳酸氢铵溶液为沉淀剂制备大颗粒氧化铈,考察了反应温度、料液质量浓度、沉淀剂加入时间、晶种加入量、陈化时间、搅拌速度对氧化铈粒径和离散度的影响,确定了灼烧碳酸铈的升温速度和灼烧温度。分别以氧化铈粒度和离散度为评价指标,通过正交试验优化工艺条件。结果表明:适宜条件下制备的氧化铈粒径在25~55μm范围内,分散均匀,质量稳定。The preparation of large particles of cerium oxide with ammonium bicarbonate solution as precipitator was studied.The effects of reaction temperature,mass concentration of feed liquid,adding time of precipitator,amount of crystal seed,aging time and stirring speed on particle size and dispersion of cerium oxide were investigated.The heating rate and temperature of cerium carbonate were determined.The particle size and dispersion of cerium oxide were used as evaluation indexes to optimize the process conditions by orthogonal test.The results show that the particle size of cerium oxide prepared under suitable conditions is in the range of 25~55μm,the dispersion is uniform and the quality is stable.

关 键 词：稀土 碳酸氢铵 沉淀法 氧化铈 制备 高附加值 大颗粒 

分 类 号：TF845[冶金工程—有色金属冶金] TF123