Abstract:In order to reduce the fuel consumption of blast furnace, the Rist operating line was calculated and drawn on the basis of the production parameters of No.1 blast furnace in Jingtang. The influence of the blast furnace operation parameters, such as the gas utilization, hotblast temperature, carbon content in iron and metal ratio on the fuel rate was analyzed. According to the influence factors, a series of measures were taken to reduce the No.1 blast furnace fuel ratio in Jingtang, such as strengthening the management of raw materials to improve the quality of raw fuel, which created the conditions for the reduction of fuel consumption. Through optimizing the BF operation, reducing the dome temperature of hot blast stove, reforming the hot air pipeline, the safety of air supply system was improved and the hotblast temperature was improved as high as possible. High gas use ratio was realized by optimizing the charging system. Through the high hotblast temperature, high oxygen ratio, and stable and uniform coal injection, the high coal replacement ratio was realized. Through the production practice, the fuel ratio of No.1 blast furnace in Jingtang was reduced to 490 kg/t.