Ratio between Unconsumed Coal and Coke Particle in BF Dust

The particle size distribution in BF dust (gravitational dust and sludge) at Baosleel was measured. 85% of the particles in the sludge are smaller than 149 mu m, while 60% of the particles in the gravitational dust are in the range 74 similar to 297 mu m. It was found by microscopic analysis that the structure of unconsumed coal is different from that of the coke particles. Based on the carbon status in BF dust, the proportion of carbon from unconsumed coal and coke particles was determined by microscopic analysis at different PCI rates at Baosteel. The unconsumed coal ratio in the carbonaceous substances (H) in BF dust at Baosteel could be determined and then the percentages of unconsumed coal and coke particles in BF dust were obtained.