Effect of Coke Reaction Index on Reduction and Permeability of Ore Layer in BF Lumpy Zone under Non-isothermal Condition
Reasonable control on coke CRI is one of the key factors for blast furnace (BF) low-carbon smelting.However,contrary opinions exist.One is increasing CRI to improve reaction efficiency in BF and the other is decreasing CRI to suppress coke degradation in furnace.In this article,different methods are adopted to realize effective catalysis (increase) and passivation (decrease) of coke CRI.Simulation tests of coke in BF lumpy zone under gradually temperature rising have been done.Effect of coke CRI on gas composition,ore reduction,burden column permeability and heat reserve zone’s temperature under non-isothermal condition are studied.Then combined with iron making calculations,a novel BF operation suggestion is proposed coke nut with small size be catalyzed and mixed with ore while skeletal coke with large size be passivated and separately charged into BF.
blast furnace coke CRI reduction resistance loss
ZHAO Hong-bo CHENG Shu-sen BAI Yong-qiang HUO Shou-feng
State Key Laboratory of Advanced Metallurgy,University of Science and Technology Beijing,100083,Chin State Key Laboratory of Advanced Metallurgy,University of Science and Technology Beijing,100083,Chin
国际会议
Asia Steel International conference 2012(第五届亚洲钢铁大会)
北京
英文
1-6
2012-09-23（万方平台首次上网日期，不代表论文的发表时间）