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| Softening-Melting Dropping Behavior of Pre-Reduction Iron-Bearing Burden in Blast Furnace |
| WU Sheng-li1,2，TUO Bi-yang1,2，ZHANG Li-hua1,2，WU Jian-long1,2，SUN Ying1,2 |
（1. State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083， China
2. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China） |
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Abstract Softening-melting dropping characteristics of pre-reduction burden with the different degree of metallization, contained certain carbon were investigated. The results show that although the softening temperature interval of the pre-reduction burden is larger than that of the original burden; however charge column pressure drop is less. In the melting and dropping temperature interval, the melting start temperature increases with increasing metallization rate of burden, the dropping temperature reduces with increasing carbon content in molten iron, the maximum pressure drop of the charge column decreases with increasing metallization rate. SD decreases with increasing metallization rate or increasing carbon content. It is speculated that pre-reduction burden included a certain degree carbon content is benefit to increase spaces of soften layer, decrease the thickness of melting layer, and thus improve the permeability of cohesive zone.
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Received: 26 October 2012
Published: 28 May 2013
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2013, Vol. 48 
