Effect of Raceway, Tuyere Diameter and Scab on Gas Flow in Blast Furnace

Abstract

Some mathematical methods had been presented for the investigation of two dimensional gas flow distribution in a packed column. These methods, however, were not enough to be applied to the gas flow analysis in blast furnaces yet. In this paper, a modification has been made on the calculation method of pressure distribution and a gas flow model has been developed for blast furnace with nonuniform distributions of void ratio, grain diameter and temperature.
In addition, using both two dimensional experimental results and the mathematical gas flow model which corresponds to its experimental cold model, gas flow pattern and velocity profile around raceway are presented.
Using the mathematical gas flow model, gas flow distribution in the blast furnace with different tuyere diameters or with scab on its wall is also qualitatively studied.