An Integrated Model of Coal/Coke Combustion in a Blast Furnace

A three‐dimensional integrated 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 the operation of pulverized coal injection in an ironmaking blast furnace. The model integrates two parts: pulverized coal combustion model in the blowpipe‐tuyere‐raceway‐coke bed and the coke combustion model in the coke bed. The model is validated against the measurements in terms of coal burnout and gas composition, respectively. The comprehensive in‐furnace phenomena are simulated in the raceway and coke bed, in terms of flow, temperature, gas composition, and coal burning characteristics. In addition, underlying mechanisms for the in‐furnace phenomena are analyzed. The model provides a cost‐effective tool for understanding and optimizing the in‐furnace flow‐thermo‐chemical characteristics of the PCI process in full‐scale blast furnaces.