Blast furnace operation with pulverized coal injection at different technological conditions

Efficiency of pulverized coal injection (PCI) at two blast furnaces (BFs) i n Spain and Ukraine which operate at different burden and blast conditions has been analyzed using statistical methods, calculation of material and he at balances and a mathematical model. Effect of PCI on the parameters of bl ast furnace operation, pig iron quality and also on interactions between pr ocess parameters has been studied. At high-grade burden and high parameters of the combined blast, dependence of coke consumption rate on PC amount is linear up to a high rate of PCI. At unfavorable burden and technological c onditions dependence of the main furnace operating parameters on PC rate ha s extreme character. High efficiency of PC use can be achieved at the diffe rent conditions due to optimization of the technological regime.