Abstract
The carbon mass fraction of blast furnace (BF) dust (gravitational dust and sludge) was determined under normal production conditions in industrial tests. The mass fraction of unconsumed coal and coke particles in BF dust at different PCI rates was obtained based on microscopic and chemical analysis. A relationship between PCI rate and mass fraction of unconsumed coal in BF dust was derived. The amount of unconsumed coal and coke particles in BF dust at different PCI rates was obtained. The utilization factor of injected pulverized coal into BF was determined under different PCI rates at Baosteel. This result provides a necessary analysis method at large PCI rate in BF.
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