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| Experimental Study on Softening-Dripping Behavior of BF BurdensWith Charging Carbon Composite Iron Ore Hot Briquette |
| CHU Man-sheng1,LIU Zheng-gen1,WANG Zhao-cai1,ZHAO Kai2,GUO Tong-lai1 |
1. School of Materials and Metallurgy, Northeastern University, Shenyang 110004, Liaoning, China
2. State Key Laboratory of Advanced Steel Processes and Products, Central Iron and Steel Research Institute, Beijing 100081, China |
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Abstract Effects of carbon composite iron ore hot briquette (CCB) with different charging proportions on the softening-dripping behavior of blast furnace burdens were investigated systemically and theoretically, based on the common iron-making materials. The results show that charging CCB affects greatly on the softening-dripping parameters of blast furnace burdens, such as softening range, melting range (or cohesive zone), dripping ratio, gas permeability etc. With the increasing CCB charging ratio, the softening range t40-t4 tends to narrowing. The melting range tD-tS also tends to narrowing, and the melting start temperature tS gradually increase, the dripping temperature tD gradually decline. The dripping ratio tends to increasing then decreasing, which comes up to its highest value (6710%) at the charging proportion 40%. The max pressure difference tends to increasing then decreasing, but it is reduced with CCB charged. Taking account of the softening-dripping behavior of comprehensive burdens comprehensively, the appropriate proportion of CCB charging into blast furnace burdens should be set around 40%-50%.
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Received: 07 January 2011
Published: 17 November 2011
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2011, Vol. 46 
