Experimental Research of Effect of Iron Ore Powders Ratio on Ferro-Coke Quality
SHI Shi-zhuang1,SUN Chao-qi1,BI Xue-gong2,ZHANG Hui-xuan2, DONG Qing-wen1, LIN Zhi-long1
(1. Hubei Coal Conversion and New Carbon Materials Key Laboratory, Wuhan University of Science and Technology, Wuhan 430081, Hubei, China 2. Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology, Wuhan 430081, Hubei, China
Abstract:High reactivity ferro-coke is a novel blast furnace burden material which could improve blast furnace efficiency and reduce CO2 emissions greatly, and reaches the goal of reasonable utilization of resources of low-grade coal and iron ore. Through a series of coke-making experiments, the relationship between the ratio of iron ore powders and the ferro-coke properties such as ash content, sulfur content, relative density, mechanical strength and thermal property were studied under condition of various iron ore powders and blend ratios. The results show that, with increasing of ratios of iron ore powders, for the ferro-coke, sulfur content increases slightly, ash content increases linearly, both true and apparent relative densities increase, both total and apparent porosity decrease, both crushing strength and abrasive strength decrease, reactivity increases and strength after reaction decreases, metallic iron content increases and reduction degree of iron oxides increases for the Canadian and E-xi iron ore powders and reduction degree of iron oxides decreases for the Australian iron ore powder. On the ratio of iron ore powder less than 15%, the mass percent of metallic iron is 6%-9%, and reduction degree of iron oxides is 55%-70% for the ferro-coke from Canadian and E-xi iron ore powder.
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SHI Shi-zhuang,SUN Chao-qi,BI Xue-gong,ZHANG Hui-xuan, DONG Qing-wen, LIN Zhi-long. Experimental Research of Effect of Iron Ore Powders Ratio on Ferro-Coke Quality. Iron and Steel, 2014, 49(5): 7-12.
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