酸性球团矿矿相结构及冶金性能研究  

Study on Mineralogical Structures and Metallurgical Properties of Acid Pellets

作　　者：丁尚尚 刘磊 韩秀丽 张玓 周祥 Ding Shangshang;Liu Lei;Han Xiuli;Zhang Di;Zhou Xiang(College of Mining Engineering,North China University of Science and Technology,Tangshan 063210,Hebei,China)

机构地区：[1]华北理工大学矿业工程学院

出　　处：《钢铁钒钛》2019年第5期120-125,共6页Iron Steel Vanadium Titanium

基　　金：国家自然科学基金资助项目(51574105);河北省钢铁联合基金资助项目(E2016209299);华北理工大学大学生创新创业训练计划项目(X20180239)

摘　　要：球团矿的矿物组成和显微结构是影响其冶金性能的重要因素,采用偏光显微镜和X射线衍射仪对不同钢厂酸性球团矿的矿物种类及含量、形貌大小、分布规律和气孔特征进行了定量研究,并结合冶金性能测试,探讨了酸性球团矿的矿相结构影响其质量的根本原因。结果表明,邯钢、唐钢和承钢球团矿的显微结构较均匀,主要由抗压强度较好的磁铁矿、赤铁矿和铁橄榄石胶结而成;攀钢球团矿抗压强度表现最差,其对应的显微结构不均匀,外部带以钛赤铁矿粒状结构为主,内部带以钛磁铁矿熔蚀结构为主,金属相间晶键连接性弱。承钢球团矿显微结构以分布均匀的大气孔居多,且气孔间连通性好,其还原性明显优于其他钢厂。The mineral composition and microstructures of pellets are important factors affecting their metallurgical properties.The mineral types,contents,morphology,size,distribution and pore characteristics of acid pellets from different steel works were quantitatively studied by polarizing microscope and X-ray diffraction,a nd metallurgical properties were tested.The fundamental reason for the mineral phase structure of acid pellets affects the quality of pellets was discussed.The results show that microstructures of acid pellets in Hangang,Tanggang and Chenggang steel mills are relatively uniform.They are mainly cemented by magnetite,hematite and iron olivine with better compressive strength.The compressive strength of Pangang’s pellets is the lowest,and the corresponding microstructures are not uniform.The outer zone is dominated by the granular structure of ilmenite hematite,while the internal zone is mainly composed of titanomagnetite corrosion structure,and the connectivity between metal phases is weak.The microstructures of Chenggang’s pellets are mostly uniformly distributed and have good connectivity between the pores.The reducibility of the Chenggang’s pellets is obviously better than the those of other pellets.

关 键 词：酸性球团矿 矿物组成 显微结构 抗压强度 还原性 

分 类 号：TF046.6[冶金工程—冶金物理化学]