Theoretical Research on the Effects of Oxygen Enrichment and Pulverized Coal Injection on Performance of Tuyere Raceway Zone in Blast Furnace

The effects of both the oxygen enrichment and pulverized coal injection(PCI) on the performance of tuyere raceway zone in 4^# blast furnace of Pangang,especially on the theoretical combustion temperature and composition of the gas,have been investigated by using the thermodynamics software FactSage.The results indicate that,under current operation conditions,the PCI of the 4^# blast furnace in Pangang can be increased to 185 kg/t.However,the PCI will reach the threshold at 245 kg/t.And both the oxygen enrichment and PCI can increase the temperature in raceway zone,but the effect of PCI is more significant compared with oxygen enrichment.The influences of both the oxygen enrichment and PCI on the composition of the gas are also different.