Materials Reports  2020, Vol. 34 Issue (Z2): 186-193 |
| INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
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| Three-dimensional Flow and Heat Transfer Behavior of Gas-Solid in Iron Ore Powder Pre-reduction Rotary Kiln |
| SUN Jian, QI Tianyi, JU Dianchun, QIU Jiayong
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| School of Metallurgy and Materials Engineering, Jiangsu University of Science and Technology, Suzhou 215600, China |
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Abstract In this paper, the influence of physical parameters of gas and material as well as rotary kiln operating parameters on the motion characteristics of gas and material in the kiln were discussed firstly with the numerical simulation method, and the influence on the gas temperature distribution along kiln axial and the kiln cross-sectional temperature distribution were discussed in order to provide theoretical guidance for the pre-reduction process of iron ore powder rotary kiln. The study shows that the gas temperature in the kiln increases with the increase of gas injection velocity. Too large inclination angle of the rotary kiln causes the maximum velocity of material particles to be far from the position of the central chord. The increase of rotational velocity of the rotary kiln impel the location of maximum velocity of material particles to be close to the central chord. Excessively high gas injection velocity or material mass flow are negative to promote the heat exchange process in the kiln. Reasonable process and structure parameters of iron ore powder pre-reduction rotary kiln are as follows: material mass flow of 13.88 kg/s, gas inlet velocity of 16 m/s, rotary kiln inclination of 3° and rotary kiln rotational velocity of 0.6 r/min.
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Published: 08 January 2021
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| Fund:This work was financially supported by the National Key Research and Development Program of China(2017YFB0603801). |
| About author:: Jian Sun received B.E. degree in metallic materials engineering from the Jiangsu University of Science and Technology (JUST) in Sep. 1999—Jun. 2003, and Ph.D. degree in ferrous metallurgy from the Northeast University in Sep. 2005—Jul. 2011. He was appointed to the faculty upon graduation, and is currently an asso-ciate professor and master supervisor of the JUST. He has published more than 20 journal papers as the first author, applied 2 national invention patents. His research interests focus on the preparation of special steel and mathematical and physical simulation of metallurgical process. He was in charge of the Natural Science Youth Fund Project of Jiangsu Province etc. and has trained three masters and more than 100 undergraduates. |
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