Three-dimensional modelling of in-furnace coal/coke combustion in a blast furnace

详细信息    查看全文

• 作者：Y.S. Shen ; B.Y. Guo ; A.B. Yu ; P.R. Austin ; P. Zulli
• 关键词：Pulverized coal injection ; Mathematical modelling ; Blast furnace lower zone ; In-furnace
• 刊名：Fuel
• 出版年：2011
• 出版时间：February 2011
• 年：2011
• 卷：90
• 期：2
• 页码：728-738
• 全文大小：1762 K

文摘

A three-dimensional mathematical model of the combustion of pulverized coal and coke is developed. The model is applied to the region of lance-blowpipe-tuyere-raceway-coke bed to simulate in-furnace phenomena of pulverized coal injection in an ironmaking blast furnace. The model integrates not only pulverized coal combustion model in the blowpipe-tuyere-raceway-coke bed but also coke combustion model in the coke bed. The model is validated against the measurements under different conditions. The comprehensive in-furnace phenomena are investigated in the raceway and coke bed, in terms of flow, temperature, gas composition, and coal burning characteristics. The underlying mechanisms for the in-furnace phenomena are also analysed. The simulation results indicate that it is important to include recirculation region in the raceway and the coke bed reactions for better understanding in-furnace phenomena. The model provides a cost-effective tool for understanding and optimizing the in-furnace flow-thermo-chemical characteristics of the PCI operation in full-scale blast furnaces.