Abstract
A hot stove is equipment which supplies high temperature air kept at a constant temperature to a blast furnace by using the heat regenerative function of brick. A hot stove is required to operate at a high efficiency under the condition of supplying required heat energy to a blast furnace and, in addition, protecting equipment. Kawasaki Steel Corporation has developed a model to automatically set combustion gas flow rate, and applied it to the No. 6 blast furnace at Chiba Works. The feature of this model lies in the application of fuzzy theory. In this model, the set value of gas flow rate is calculated by means of fuzzy inference based on the evaluations of the residual heat value and brick temperature distribution. The implementation of the operation using this model resulted in an improvement in the thermal efficiency of the hot stove.
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