Method for producing pig iron

Abstract

A method for producing pig iron using a blast furnace including a tuyere, the method including charging a first layer containing an iron ore material and a second layer containing coke alternately in the blast furnace and reducing and melting the iron ore material in the first layer while injecting an auxiliary reductant into the blast furnace by hot air blown from the tuyere. The iron ore material contains a reduced iron molded product obtained by compression molding of reduced iron, the auxiliary reductant contains pulverized coal, a blending amount of the reduced iron is greater than or equal to 200 kg per ton of pig iron to be produced, a reducing agent ratio of a reducing agent containing the coke and the pulverized coal is less than or equal to 440 kg/tp, and a pulverized coal ratio is greater than or equal to 130 kg/tp.

Dependencies are inferred from the claim text.