Estimation of Lower Limit of Fuel Rate in Blast Furnace by Mathematical Model

Abstract

For the purpose of estimating the fuel rate in case that operating conditions of a blast furnace are given. a mathematical model has been developed. This model was built based upon the method which was used by Muchi et al. and the data which were taken from the recent dissection of blast furnaces were adopted, by taking account of the softening-melting zone, the melts dropping through a dead man, and the reduction of silicates by gas-metal reactions.
With the aid of this model, the fuel rate was estimated based upon the operating conditions at No. 3 blast furnace of Kimitsu Works in March, 1975. By comparing the calculated fuel rate and the actual one, the usefulness of this model has been confirmed. Further, the fuel rate has been estimated making use of the data set at a boundary condition and compared with the theoretical fuel rate which was derived by Nakatani et al.