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The effect of coke nut introduction in charge material (in the amount 10.9-12.8 kg per ton of hot metal) on operation parameters of blast furnaces with volume 1370 and 2014 m 3 have been established via industrial investigations. These blast furnaces are operating in the conditions of bottom and top areas determining by their gas dynamics. Parameters of gas dynamic conditions, fuel burning, iron reduction from FeO using different reducing agents, furnace thermal operation and hearth drainage capacity are analyzed.

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