For studying the microscopic mechanism of pulverized coal injection (PCI) process to optimize BF operation further, the multiphase-coupled interactions and combustion phenomena is described by mathematical equations. Some assumptions are employed properly in simulation for solving the equations well. Some physical properties of per-phase obtained through simulating the typical flow behaviors in iron-making process were contrastive analyzed with the field data. The investigation shows that the complex phenomena in a BF can be presented by the computational approach which is proved virtual and robust. The computational results have shown that the gas-solid-powder flow varies spatially, particularly in the raceway; the powder flow is strongly affected by the air and coke particles under the cohesive zone, and by the ore particles upon the cohesive zone; the ability of BF could be enhanced with higher rate of coal injection to a certain extent.
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