METHOD OF CHARGING RAW MATERIAL TO BLAST FURNACE

摘要

PURPOSE:To impart an aimed ore/coke weight ratio (O/C) to the central part of the blast furnace and to improve the rate of utilizing gases in the central part of the furnace by charging blast furnace raw materials in another route to the central part of the blast furnace. CONSTITUTION:The raw material mixture 6 is charged onto the infurnace charging plane 5 in the central part of the furnace by a charging chute 2 of another route prior to charging of ore 3 and coke 4 in a laminar state onto the plane 5 by a bell type or bell-less type charging device 1. The ore 3 and the coke 4 are then charged in the laminar state to the peripheral part thereof. The raw material charging of this one unit is repeated. The raw material mixture 6 is the raw materials prepd. by previously mixing the ore 3 and the coke 4 at prescribed weight ratios or the iron source/carbonaceous material composits formed by lumping the iron source and carbonaceous material at prescribed ratios. The O/C of high accuracy is thereby impacted to the central part of the furnace. The mixing ratio of the raw material mixture 6 is arbitrarily set according to the purpose of the blast furnace operation such as the correct flow rate of gases in the central part.