Softening and Melting Behavior of Mixed Burden for Oxygen Blast Furnace  

作　　者：AN Xiu-wei WANG Jing-song LAN Rong-zong HAN Yi-hua XUE Qing-guo 

机构地区：[1]State Key Laboratory of Advanced Metallurgy, School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing

出　　处：《Journal of Iron and Steel Research International》2013年第5期11-16,共6页

基　　金：Sponsored by National Basic Research Program(973Program) of China(2012CB720401);National Key Technology Research and Development Program in 12th Five-Year Plan of China(2011BAC01B02)

摘　　要：The behaviors of mixed burden in the cohesive zone of oxygen blast furnace were studied by softening and melting tests, and the influence of reducing gas and burden basicity on the softening and melting behaviors of mixed burden was also investigated. The results indicated that the softening range became wide, however, the melting range narrowed sharply in the atmosphere of oxygen blast furnace. The permeability of burden in the oxygen blast furnace was obviously improved comparing with the conventional blast furnace. In addition, the content of sulphur in the dripping iron of oxygen blast furnace was much lower than that of conventional blast furnace, however, the content of carbon increased. An optimum basicity of burden, which could lead to the appearance of the narrower melting range and better permeability of burden, was obtained in the atmosphere of oxygen blast furnace.The behaviors of mixed burden in the cohesive zone of oxygen blast furnace were studied by softening and melting tests, and the influence of reducing gas and burden basicity on the softening and melting behaviors of mixed burden was also investigated. The results indicated that the softening range became wide, however, the melting range narrowed sharply in the atmosphere of oxygen blast furnace. The permeability of burden in the oxygen blast furnace was obviously improved comparing with the conventional blast furnace. In addition, the content of sulphur in the dripping iron of oxygen blast furnace was much lower than that of conventional blast furnace, however, the content of carbon increased. An optimum basicity of burden, which could lead to the appearance of the narrower melting range and better permeability of burden, was obtained in the atmosphere of oxygen blast furnace.

关 键 词：oxygen blast furnace SOFTENING MELTING mixed burden BASICITY reduction degree 

分 类 号：TF57[冶金工程—钢铁冶金]