Mg(HCO_(3))_(2)沉淀(LaCe)_(2)(SO_(4))_(3)制备稀土抛光粉及其抛光性能  

Study on preparation and polishing performance of rare earth polishing powder by precipitation from(LaCe)_(2)(SO_(4))_(3)with Mg(HCO_(3))_(2)

作　　者：张全鑫 李虎平 史俊龙 宿爱 金玉培 谢浩 ZHANG Quan-xin;LI Hu-ping;SHI Jun-long;SU Ai;JIN Yu-pei;XIE Hao(Gansu Rare Earth New Material Limited-Liability Company,Baiyin 730922,China)

机构地区：[1]甘肃稀土新材料股份有限公司,甘肃白银730922

出　　处：《兰州理工大学学报》2024年第3期27-32,共6页Journal of Lanzhou University of Technology

摘　　要：以包头混合型稀土矿经浓硫酸强化焙烧、水浸、中和除杂、P_(507)转型预分级的产物(LaCe)_(2)(SO_(4))_(3)液为初始料液,以硫酸镁废水经碱转、碳化制得的Mg(HCO_(3))_(2)溶液为沉淀剂,通过沉淀、氟化、焙烧、破碎分级等工序成功制备出一种镧铈稀土抛光粉.对制备的镧铈抛光粉形貌、物相及抛光性能进行表征.结果表明:制备的镧铈稀土抛光粉颗粒成形好,分布较均匀.用其抛光K9玻璃,当累积抛光120 min后,玻璃片抛蚀量可达352 mg,且玻璃片面粗糙度S_(a)由初始的2.0 nm降低至1.742 nm.而以NH_(4)HCO_(3)沉淀(LaCe)Cl_(3)工艺制备的镧铈抛光粉,在相同抛光条件下玻璃片抛蚀量仅为299 mg,面粗糙度S_(a)由初始的2.0 nm降低至1.767 nm.因此,在保持相同抛光质量的前提下,Mg(HCO_(3))_(2)沉淀(LaCe)_(2)(SO_(4))_(3)工艺制备的镧铈稀土抛光粉综合性能更优.The initial feed liquid was lanthanum cerium sulfate solution produced from Baotou mixed rare earth ore after intensive roasting with concentrated sulfuric acid,water leaching,neutralization and impurity removal,and P_(507) transformation before pre-classification.The precipitant was magnesium bicarbonate solution,which was prepared by alkali conversion and carbonization of the magnesium sulfate wastewater.La&Ce rare earth polishing powder was successfully prepared by precipitation,fluorination,roasting,crushing,and grading.The morphology,phase,and polishing performance of La&Ce polishing powder were characterized.The results showed that La&Ce rare earth polishing powder particles are well-formed and evenly distributed.The K9 glass was used for performance testing of prepared polishing powder.The polishing results showed that the accumulated polishing rate reaches 352 mg after 120 minutes,and the surface roughness Sa reduce from the initial 2.0 nm to 1.742 nm.In contrast,lanthanum-cerium polishing powder prepared by precipitation of(LaCe)Cl_(3) with NH_(4)HCO_(3) achieves a lower polishing rate of only 299 mg under the same polishing conditions,and the surface roughness Sa decrease to 1.767 nm from the initial 2.0 nm.As a consequence,the comprehensive performance of rare earth polishing powder prepared by Mg(HCO_(3))_(2)precipitation(LaCe)_(2)(SO_(4))_(3)process is superior while maintaining the same polishing quality.

关 键 词：沉淀 制备 抛光粉 抛光性能 

分 类 号：TG73[金属学及工艺—刀具与模具] O614.33[理学—无机化学]