In blast furnace smelting, the change of heat energy seriously affects the stable operation of blast furnace, so it is very important to maintain the dynamic balance of heat. The heat of blast furnaces is mainly provided by hot air, coke and blowing coal powder. Limited by the high cost of coke, high coal ratio smelting is a widely accepted smelting model. Based on the actual furnace condition of the No. 8 blast furnace, this paper discusses the impact of several factors, such as wind delivery system, heat system and smelting cycle, when the situation of sudden less coal in the high-coal ratio operating mode is discussed.
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