CeO2对白云鄂博铁矿压团强度的影响
罗果萍，王致远，王永斌
（内蒙古科技大学材料与冶金学院，内蒙古包头 014010）
关键词：CeO2；白云鄂博铁矿；压团；抗压强度
中图分类号：O643.36 文献标识码：A
摘要：在白云鄂博铁精矿中添加CeO2制成压团试样，对其进行预热及焙烧，利用SEM-EDS和矿相分析相结合的方法，研究了CeO2含量对白云鄂博铁矿压团抗压强度的影响。结果表明，在975℃预热压团中形成的Ce-Fe-O固溶体，使Fe2O3晶粒间的连接增强，预热压团强度随之增大；在1250℃焙烧压团中Ce-Fe-O固溶体发生了脱溶和分解，析出的高熔点氧化物CeO2存在于Fe2O3晶粒间，阻碍了Fe2O3晶粒之间的连晶生长，使焙烧压团的强度随CeO2含量增多而降低。
Research on the influence of CeO2 contenton compressive strength of Baiyunebo iron ore pellets
LUO Guo-ping, WANG Zhi-yuan, WANG Yong-bin
(Material and Metallurgy School, Inner Mongolia University of Science and Technology, Baotou 014010,China)
Key words: CeO2; Baiyunebo iron ore; pellet;compressive strength
Abstract: Pellet samples prepared by adding CeO2into Baiyunebo iron ore concentrates were treated by preheating and roasting. Theinfluence of CeO2 content on the compressive strength of samples wasanalyzed by scanning electron microscope (SEM) and metallographicmicroscope.The results show that Ce-Fe-Osolid solution was formed in preheated samples at 975℃,whichpromoted the connection between Fe2O3 grains and enhancedthe compressive strength of the preheated pellets. TheCe-Fe-O solid solution decomposed at 1250℃,and thehigh-melting-pointed CeO2 existed between Fe2O3grains. CeO2 inhibited the growth of crystal shocks between Fe2O3grains. As a result, the compressive strength of roasted pellets decreased withincreasing the CeO2 contents.