FIELD: metallurgy, namely, pig iron production. SUBSTANCE: method comprises detecting of gas content along radial directions in upper portion of shaft and determining the clogging factor Qd of hearth; washing the hearth when values of said factor is equal to 60-90% in any point of cross section of mouth; determining the value of factor Qd according to relation x 100%, where Fed, quantity of ferrum reduced to direct way for 1 cu. m of hearth gas, kg/cu.m; Fek, quantity of ferrum reduced by indirect way for 1 cu.m of hearth gas, kg/cu.m. EFFECT: increased efficiency of blast furnace, lowered coke consumption. 3 tbl
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Authors
Dates
1997-01-20—Published
1992-07-21—Filed