EFFECT OF PULVERIZED-COAL FUEL ON THE EMISSIVITY OF THE TUYERE ZONE AND THE THERMAL REGIME OF THE HEARTH OF A BLAST FURNACE

摘要

A method is developed for quantitatively determining the emissivity of the tuyere zone and the temperature of the pig iron during its tapping from a blast furnace when the furnace is injected with up to 230 kg of pulverized-coal fuel for each ton of pig iron that is produced. An evaluation is made of the changes in the thermal regime of the hearth in this case, with particular attention being given to the intensified heating of the smelting products.