混合沉淀剂制备碳酸镧及其沉淀结晶过程研究  

Preparation of Lanthanum Carbonate with Mixed Precipitation Agent and Its Precipitation Crystallization Process

作　　者：郭金铖 田皓[1,2] 王新宇 张学婕 张永华 蔚腊先 Guo Jincheng;Tian Haol;Wang Xinyu;Zhang Xueje;Zhang Yonghua;Yu Laxian(State Key Laboratory of Baiyunobo Rare Earth Resource Researches and Comprehensive Utilization,Baotou Research Institute of Rare Earth,Baotou 014030,China;Department of Materials and Metallurgy,Inner Mongolia University of Science and Technology,Baotou 014010,China;China Northern Rare Earth(Group)High-Tech Co.,Ltd.,Baotou O14030,China)

机构地区：[1]白云鄂博稀土资源研究与综合利用国家重点实验室,包头稀土研究院,内蒙古包头014030 [2]内蒙古科技大学材料与冶金学院,内蒙古包头014010 [3]中国北方稀土(集团)高科技股份有限公司,内蒙古包头014030

出　　处：《中国稀土学报》2023年第6期1126-1131,I0004,共7页Journal of the Chinese Society of Rare Earths

基　　金：国家自然科学基金项目(51634005);内蒙古关键技术攻关项目(2021GG0242);中国北方稀土课题项目(BFXT2020D0003)资助。

摘　　要：采用液相沉淀法以La Cl_(3)溶液为原料,NH_4HCO_(3)和NH_(3)·H_(2)O为混合沉淀剂,并流沉淀制备La_(2)(CO_(3))_(3)产品。利用在线粒度监测仪、在线成像测试仪、X射线衍射仪等测试手段对沉淀反应结晶过程中不同反应时间得到产品的粒度分布、形貌变化、晶体结构进行研究,同时跟踪产品的稀土总量和氯根含量。结果表明:沉淀结晶过程中产品的粒度、形貌、晶体结构、稀土总量和杂质含量均随反应时间呈现规律性变化,研究结果可以为工厂生产不同物理性能碳酸稀土产品提供依据,满足多元化高端市场的需求。Preparation of Lanthanum Carbonate with Lanthanum carbonate was prepared by parallel flow precipitation process with mixed precipitant which consists of ammonium bicarbonate and ammonia and lanthanum chloride solution as material.The particle size distribution,morphology change and crystalline structure of lanthanum carbonate at different time during precipitation process were studied by utilizing an on-line particle size analyzer,an on-line imager and X-ray diffraction.Meanwhile,the content of rare earth and chloride ion in lanthanum carbonate was also measured.The findings indicate that the particle size,morphology,crystal form,crystalline structure and the content of rare earth and impurities show a regular change with the increase of reaction time.The result provides a method which can produce diverse physical properties rare earth carbonate for factories to meet the diverse needs in high-end market.Mixed Precipitation Agent and Its Precipitation Crystallization Process.

关 键 词：碳酸镧 混合沉淀剂 并流沉淀法 在线监测 物理性能 

分 类 号：O614.33[理学—无机化学]