| 摘要 |
<p>In this blast furnace operation method that, using a rotating chute, charges into a blast furnace a blast furnace charging starting material of coke and an ore staring material such as pellet- or clod-shaped ore, when charging the blast furnace charging starting material into the blast furnace, a central coke layer is formed at the axial center section of the blast furnace, a mixed layer of ore starting material and coke is formed at the outside of the central coke layer, and at such a time, the mixing ratio of coke in the blast furnace radial direction towards the furnace wall from the axial center of the blast furnace is caused to vary continuously or discretely, thereby securing air permeability even when performing a high-volume blow-in operation of pulverized coal and achieving an increase in thermal efficiency and a stabilization of blast furnace operation.</p> |
