Effects of Mineral Oxides on the Precipitation Micro-Morphology of Metallic Iron in the Reduction of Iron Oxides under CO Atmosphere

摘要：

　　Grain sticking often occurs in the gaseous fluidized ironmaking of fine ore,which is closely related to the precipitation morphology of metallic iron on the surface of ore particles.In this work,simulating the gas-solid reduction process of iron ore,in situ observations was used to investigate effects of mineral oxides on the precipitation morphology evolution of metallic iron in the reduction of iron oxides with CO.Results indicate that the precipitation morphology of metallic iron is related to the quantity of doping mineral oxides.The minimum mole fraction of doping oxide (NAyox)which can inhibit the growth of iron whiskers is related to its cation radius (rAx+),its extranuclear electronic layers (nAx+)and valence electrons (qAx+),which can be expressed as:NAyox =1.3 ×10-5 ·r2Ax+ ·(√)nX+/(qAx+-1) !.

关键词： ironmaking gas reduction in situ observation iron whisker mineral oxides

作者: Zhao Zhilong Guo Zhancheng Tang Huiqing

作者单位: State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, China

会议类型: 国际会议

会议名称: The 4th Australia-China-Japan Joint Symposium on Iron and Steelmaking(第四届中日澳钢铁冶金学术会议)

会议地点: 沈阳

会议语种:英文

页码: 103-109

在线出版日期: 2012-11-03（万方平台首次上网日期，不代表论文的发表时间）