Modeling transport phenomena in the Raceway zone of the Blast Furnace

The raceway zone in the blast furnace is the primary responsible for the production of the combustion gases. The size and the shape of the raceway are important in determining the distribution of these gases and the enthalpy to the lower zone of the furnace. In the present work, the mathematical model for the simulation of the size and the shape of the raceway zone and the different physical processes occurring in the zone are attempted both in one-dimensional and two-dimensional approach. The combustion of both pulverized coal and the coke considered with the help of state of art models of reaction kinetics.

The predictions are in terms of the functional relationships of output parameters namely, the shape of the raceway zone, the velocity distribution of the raceway zone, the temperature distribution of the raceway zone, the species concentration distribution in the raceway zone with the specified input parameters such as geometry of the blast furnace (including dead man angle), velocity of the blast air, temperature of air at inlet of the raceway zone, oxygen enrichment and moist air in the blast air.

Typical results generated:

Gas Phase velocity vectors in the raceway zone	Gas phase temperature profile in the raceway zone
Gas Phase  CO2  mass fraction profile in the raceway zone	Gas Phase  O2 mass fraction profile in the raceway zone