METHOD for HEATING OF BLAST-FURNACE BLOWING IN shaftless airheater BLAST-FURNACE

摘要

A method for heating of the blast-furnace blowing in shaftless airheater includes supplying of gas and combustion air currents on gas and air collectors, their dividing into the separate streams, introduction of streams to prechamber and generation in its space on the height of the top and lower areas of combustion, introduction of gas and air currents into each area of combustion separately with the supplying of gas currents and air streams in prechamber one to another, interfusion of gas with air, gas combustion and heating of the airheater head in the gaseous period and heating of blast in the blast period. In addition, water-cooling sounding pipe is set over the head, the content of CO is determined in combustion gases at the head inlet, according to its content gas and air consumption is increased on the lower area of burning with a pitch of 2.5-5 % from the total gas and combustion air consumption until in combustion products before introduction to the head the content of CO will make of 10-100 mg/m, and the heating process of the head is carried out at the reached minimal content of CO.