Blast furnace ironmaking is carried out in a countercurrent gas generator with high temperature and high pres-sure.With the blast furnace put into operation,there will be different degrees of gas running phenomenon,especially under the conditions of large oxygen enrichment,large coal injection,high top pressure and high smelting intensity,the gas run-ning seriously affects the safety production and environmental protection management optimization.By analyzing the factors of blast furnace gas runaway,the gas is controlled from the aspects of blast furnace construction,adjustment of charging system and regular discharge of alkali,and the gas discharge of 2 000 m3 blast furnace body is achieved.
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