METHOD OF PRODUCING FINE COAL FOR BLAST FURNACE BLOWING

摘要

PROBLEM TO BE SOLVED: To provide a technology which prevents a situation in which a supply of fine coal to a blast furnace is stopped because coal is not supplied to a grinder due to shelf formation of the coal occurring in a coal bunker which temporarily stores coal to be supplied to the grinder.SOLUTION: A moisture content in raw material coal and a percentage of fine coal having a particle size of 0.3 mm or less are measured before being supplied to a bunker and a surfactant is added to the raw material coal before being supplied to the bunker in the case that the moisture content in the raw material coal is 8.8% or more and the percentage of fine coal having the particle size of 0.3 mm or less is 13% or more.