Authors: I. Gordon, N. Spirin, V. Shvidkiy, Y. Yaroshenko
METEC Congress, 2003, 3rd International Conference on Science and Technology of Ironmaking, Dusseldorf, June 16-20, 2003, p.p. 78-82
Abstract
The theory of heat exchange processes in blast furnaces was developed in the forties by B. I. Kitaev for the case of uniform distribution of material and gas flow. The major issue of this theory is two stage schematics of heat exchange along the furnace height. In the present operation conditions, it is very important to determine the regularities of heat and mass transfer in the working volume of the furnace for the real non-uniform radial distribution of the material and gases. Such approach allows to determine the bottleneck in the furnace operation and to perform appropriate steps to intensify the mass and heat transfer processes in a local limiting zone of the furnace. Reliable and accurate theory of heat exchange as well as experimental technique for the control of the non-uniform processes in the blast furnace are the solid basis for successful solution of such problems.
As a result of the recent research work, the heat exchange theory by Prof. B. I. Kitaev (S-shaped temperature curve and existence of delayed heat exchange zone) is confirmed for the case of non–uniform material and gas distribution in a working volume of blast furnace. During these experiments, the principal existence of the furnace cross-section with the maximum non-uniformity of temperature distribution is determined, and the mathematical model and procedure for temperature field prognosis in the upper heat exchange zone of the blast furnace are developed.
