Control method of deadman coke temperature in blast furnace

摘要

PURPOSE: A method for controlling inflow conditions of hot blast flown into blast furnace tuyere nozzle is provided to maintain good air permeability and liquid permeability by increasing temperature of the blast furnace dead man and perform stable blast furnace operation by preventing cooling of dead man and delay of tapping. CONSTITUTION: In a blast furnace at the lower part of which tuyere nozzle is installed so that hot blast transferred from hot stove is flown into the tuyere nozzle, the method for controlling temperature of dead man in blast furnace is characterized in that an inflow angle of hot blast flown in is controlled to the range of 20 to 30 degrees of an angle so that the dead man is maintained at a high temperature by increasing the amount of electric heating into the dead man, wherein stable blast furnace operation is performed in the actual operation by analyzing circumstances inside the blast furnace according to change of inflow angle of blown air in a furnace hearth gas flow simulator so that appropriate gas inflow conditions are derived, and wherein inclination angles of tuyere nozzle(2) of (a) and (b) are 1 and 2, and inclination angle of (b) is greater than inclination angle of (a).