Numerical prediction and practical improvement of pulverized coal combustion in blast furnace |
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| Affiliation: | 1. Steel and Aluminum Research and Development Department, China Steel Corporation, Kaohsiung City, Taiwan 812, Taiwan ROC;2. Department of Marine Engineering, National Taiwan Ocean University, Keelung, Taiwan 202, Taiwan ROC;1. Key Laboratory of Advanced Coal and Coking Technology of Liaoning Province, School of Chemical Engineering, University of Science and Technology Liaoning, Anshan, 114051, China;2. Chemical Engineering, University of Newcastle, Callaghan, NSW, 2308, Australia;3. College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310014, China;1. Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Katahira 2-1-1, Aoba-ku, Sendai, Miyagi 980-8577, Japan;2. Faculty of Engineering, Hokkaido University, N13-W8, Kita-ku, Sapporo, Hokkaido 060-8628, Japan;3. Graduate School of Engineering, Tohoku University, 2-1-1, Katahira, Aoba-ku, Sendai 980-8577, Japan;1. Institut für Technische Verbrennung, Universität Stuttgart, Herdweg 51, 70174 Stuttgart, Germany;2. Dipartimento di Chimica, Materiali e Ingegneria Chimica, Politecnico di Milano, Piazza L. da Vinci, 32, 20133 Milano, Italy;3. Institute for Combustion and Gasdynamics (IVG), Chair for Fluid Dynamics, University of Duisburg-Essen, Germany;4. Chair of Numerical Thermo-Fluid Dynamics, ZIK Virtuhcon, TU Bergakademie Freiberg, Germany;1. School of Materials and Metallurgy, University of Science and Technology Liaoning, Anshan 114051, PR China;2. Research and Development Department, Anshan S. Y. D. Science & Technology Co., Ltd., Anshan 114051, PR China |
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| Abstract: | The burning characteristics of pulverized coal in blowpipe and tuyere at two different injection patterns are simulated numerically, to aid improving the practical performance of blast furnace. With the condition of the same fuel and oxidant mass flow rates, the predictions indicate that the combustion efficiency of pulverized coal using double-lance can be substantially enhanced compared with that using single lance. Accordingly, the pulverized coal injection in a practical blast furnace was modified from single lance to double-lance. As a result, the practical injection rate of the pulverized coal in the blast furnace was increased from 110 to 153 kg/tHM, revealing that a profound decrease in operating cost of the blast furnace has been implemented. |
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