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Open AccessArticle

Model-Based Analysis of Factors Affecting the Burden Layer Structure in the Blast Furnace Shaft

by Haifeng Li 1,2,3,*, Henrik Saxén 3,*, Weiqiang Liu 3, Zongshu Zou 1,2 and Lei Shao 1,2
1
School of Metallurgy, Northeastern University, Shenyang 110819, Liaoning, China
2
Key Laboratory for Ecological Metallurgy of Multimetallic Mineral (Ministry of Education), Northeastern University, Shenyang 110819, Liaoning, China
3
Thermal and Flow Engineering Laboratory, Åbo Akademi University, Biskopsgatan 8, FI-20500 Turku, Finland
*
Authors to whom correspondence should be addressed.
Metals 2019, 9(9), 1003; https://doi.org/10.3390/met9091003
Received: 21 August 2019 / Revised: 9 September 2019 / Accepted: 11 September 2019 / Published: 12 September 2019
(This article belongs to the Special Issue Advanced Simulation Technologies of Metallurgical Processing)
The distribution of burden layers in an ironmaking blast furnace strongly influences the conditions in the upper part of the process. The bed permeability largely depends on the distribution of ore and coke in the lumpy zone, which affects the radial gas flow distribution in the shaft. Along with the continuous advancement of technology, more information about the internal conditions of the blast furnace can be obtained through advanced measurement equipment, including 2D profiles and 3D surface maps of the top burden surface. However, the change of layer structure along with the burden descent cannot be directly measured. A mathematical model predicting the burden distribution and the internal layer structure during the descending process is established in this paper. The accuracy of the burden distribution model is verified by a comparison with experimental results. A sensitivity study was undertaken to clarify the role of some factors on the arising layer distribution, including the descent-rate distribution, the initial burden surface profile, and the charging direction through the charging matrix. The findings can be used as a theoretical basis to guide plant operations for optimizing the charging. View Full-Text
Keywords: blast furnace; burden distribution; burden descent; burden surface profile; charging direction blast furnace; burden distribution; burden descent; burden surface profile; charging direction
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MDPI and ACS Style

Li, H.; Saxén, H.; Liu, W.; Zou, Z.; Shao, L. Model-Based Analysis of Factors Affecting the Burden Layer Structure in the Blast Furnace Shaft. Metals 2019, 9, 1003.

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