BLAST FURNACE OPERATING METHOD FOR IMPROVING FURNACE CONDITIONS DURING HIGHLY PULVERIZED COAL INJECTION

摘要

PURPOSE: A blast furnace operating method is provided to improve the first and second stages of the lower part of the body of the blast furnace, and the air permeability resistance index by removing non-burned carbon in which pulverized coal injected into the blast furnace is not completely burned, but piled up in the raceway. CONSTITUTION: In a blast furnace operation method comprising the processes of alternately charging sintering ore and cokes into the burden charging zone that is divided into 10 notches according to the tilting angle of a charging rotary chute from the furnace top, and injecting pulverized coal along with a high temperature air from a tuyere, the method further comprises the process of removing non-burned carbon that exists in the raceway which is generated during the injection of highly pulverized coal by charging small sinter comprising FeO into the wall part of the blast furnace.