微波场煅烧制备氧化镧的粉末性能研究  

Study on Powder Properties of Lanthanum Oxide Prepared by Microwave Calcination

作　　者：李婷婷 刘威 徐占宇 尹少华[3] 张国光 崔建国[2] 冉剑锋 LI Ting-ting;LIU Wei;XU Zhan-yu;YIN Shao-hua;ZHANG Guo-guang;CUI Jian-guo;RAN Jian-feng(China North Rare Earth(Group)High-Tech Co.,Ltd.,Baotou 014010,China;Baotou Research Institute of Rare Earths,Baotou 014030,China;Kunming University of Science and Technology,Kunming 650000,China)

机构地区：[1]中国北方稀土(集团)高科技股份有限公司,内蒙古包头014010 [2]包头稀土研究院,内蒙古包头014030 [3]昆明理工大学,云南昆明650000

出　　处：《稀土》2022年第6期71-77,共7页Chinese Rare Earths

摘　　要：针对传统隧道窑天燃气煅烧存在的二氧化碳排放问题,提出了微波煅烧法制备氧化镧的生产工艺,通过升温曲线和介电常数测试、X射线衍射分析、扫描电镜、粒度、比表面积、非稀土杂质含量等物理、化学性表征,对碳酸镧的吸波性能、传统工艺和微波煅烧工艺制得的氧化镧进行对比分析研究。研究结果表明,在微波煅烧环境下,碳酸镧具有良好的吸波性能,在650℃、1 h反应条件下可完全分解,操作温度和时间均低于传统工艺,得到的氧化镧质量指标满足国家标准。In view of the carbon dioxide emissions problem of natural gas calcination used in traditional kiln, a producttion process was put forward for preparation of lanthanum oxide by microwave calcination. Absorption properties of lanthanum carbonate as raw material were analyzed and quality of lanthanum oxides prepared by the two methods was compared through dielectric constant test, temperature rise curve test, XRD, SEM, particle size test, BET test and analysis of chemical properties. The results show that under the microwave calcination environment, lanthanum carbonate has good absorption performance, and can be completely decomposed under 650 ℃ in 1 h. The operating temperature is lower and reaction time is shorter than that of the traditional process, and the quality index of lanthanum oxide obtained meets the national standard.

关 键 词：微波 煅烧 氧化镧 

分 类 号：TF845.6[冶金工程—有色金属冶金]