Degradation Characteristics of Iron Ore in COREX(R) Pre-Reduction Shaft Furnace Condition

摘要：

Iron ores degradation behaviour in COREX(R)pre-reduction shaft furnace directly affects the furnace smooth operation, gas flow distribution and equipment utilization, therefore it is attracting more and more attention from iron-making plant workers. The degradation characteristics of the typical iron feed, pellet and lump ore at different reduction stages were studied, and the corresponding gas permeability of each packed beds were also investigated. The results show that ① The degradation of pellet P-C mostly occurs between 773 K and 873 K, the proportion of larger size grains decreases by degradation meanwhile the proportion of those grains less than 0.5 mm increases. ② The degradation of lump ore L-S mostly occurs between 773 K and 973 K, the proportion of larger size grains decreases by degradation meanwhile the proportion of middle and small size grains increase. ③ Owing to the lump ore L-S further degradation at high temperature, its gas permeability is worse than pellet P-C.

关键词： COREX shaft furnace reduction of iron ore degradation characteristics

作者: WU Sheng-li ZHOU Qi XU Jian YANG Shi-dong DU Yuan ZHANG Li-hua

作者单位: School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Be School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing,Bei

会议类型: 国际会议

会议名称: The 5th International Congress on the Science and Technology of Ironmaking(第五届国际炼铁科技大会 ICSTI09)

会议地点: 上海

会议语种:英文

页码: 1280-1283

在线出版日期: 2009-10-20（万方平台首次上网日期，不代表论文的发表时间）