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| Metallurgical property of mixed burden based on a large scale iron ore droplet testing equipment |
| DI Hang1，HE Zhi-jun1，YAN Li-juan2，QIU Shuang1，ZHAN Wen-long1，ZHANG Jun-hong1 |
（1. School of Materials and Metallurgy， University of Science and Technology Liaoning， Anshan 114051， Liaoning， China
2. Raw Material Management Center， Manufacturing Management Depart， Baoshan Iron and Steel Co.， Ltd.， Shanghai 201900， China） |
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Abstract The shape and location of the cohesive zone in a BF were significantly affected by the softening dropping properties of the iron-bearing burden， which could further influence the BF stable smooth operation. The traditional iron ore droplet testing equipment at home and abroad couldn’t simulate the complicated BF burden in the actual production objectively due to the small crucible size used and few samples taken in the experiment， and the experiment results were fluctuant and poor reproducibility. The metallurgical properties of different BF burdens were detected based on a large scale iron ore droplet testing equipment with independent intellectual property rights. By comparing the large equipment testing results with the traditional testing results， it was found that the[td]value tested by the large equipment was decreased with the lump ore proportion increasing， while the[S]value showed the opposite tendency. The main components of the primary slag were melilite and dicalcium silicate （C2S）. Moreover， the[ΔP]value showed dynamic changes when it reached the peak value and the[ΔH]value increased distinctly， which were much closer to the BF practical production of the iron ore reduction process.
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Received: 22 March 2018
Published: 26 October 2018
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2018, Vol. 53 
