Exploration and Application of Raw Coal Mixing with Dry Quenching Dust Removal Technology
Changgang Iron and Steel Plant adopts a mixed injection technology of bituminous coal and long flame coal,blending coal according to the mass fraction of volatile matter of 10％～15％.For many years,it has maintained an economic injection coal ratio of about 130 kg/t.It is difficult to optimize the cost of pig iron fuel by further increasing the injection coal ratio and reducing the coke ratio.In view of this,the coal spraying operation area utilizes the characteristics of high w(C)content(over 80％)and low volatile content(mass fraction below 2.5％)of coking dry quenching dust removal ash,and the price is only 55％of the same period bituminous coal price.By adding a certain proportion of coking dry quenching dust removal ash to the raw coal,the preparation cost of coal powder is reduced,which plays a positive role in low-cost smelting of pig iron.
blast furnace coal injectiondry quenching dust removalreduce the cost of pig iron
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