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Gas-Particle Flow and Combustion Characteristics of Pulverized Coal Injection in Blast Furnace Raceway
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Gas-Particle Flow and Combustion Characteristics of Pulverized Coal Injection in Blast Furnace Raceway
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Journal Article
Gas-Particle Flow and Combustion Characteristics of Pulverized Coal Injection in Blast Furnace Raceway
2010
Overview
The two-dimensional steady-state discrete phase mathematical model is developed to analyze gas-particle flow and combustion characteristics of coal particles, as well as components concentration and temperature distribu- tion of coal gas in the process of pulverized coal injection of blast furnace raceway. The results show that a great deal of coal gas discharges on the top of raceway away from the tuyere, and the residence time of coal particles in the re- gion of blowpipe and tuyere is 20 ms or so and 50 ms when it reaches raceway boundary. The pressure is the highest at the bottom of raceway and the maximal temperature is about 2 423 K. The char combustion is mainly carried out in the raceway and the maximum of char burn-out rate attains 3× 10-4 kg/s.
