Study On Rational Use Of Dry Quenching Dedusting Ash Produced By Xingtai Steel Plant

In recent years,with the constant innovation of technology,production of blast furnace ironmaking scale unceasingly expands,along with pig iron production to further improve,the demand for coke in the ironmaking enterprise also gradually increase.Coking plant to gradually increase production pressure,also has carried on the technological innovation,the dry quenching technology.Dry quenching dedusting ash is prod uced in the process of coking and coke used in the dust,not only pollute the environment,and recycled handle hard.Due to its grain is fine,dry quenching dedusting ash if treatment is not timely,long stored will not only large areas of take up the warehouse storage space,but also to the factory and the nearby residential area and other places of life caused great pollution.A technique of cold-bound pellets of dry quenching dedusting ash for cold-bound balling,make particles are fine dust particle size increase 1 ~ 3 mm pellets,then add it in the sintering solid fuel use for sintered products.Both to avoid the pollution of the environment,but also avoids the sintering process by fairly granular flow away,reduced sinter solid fuel consumption and the cost of production.By single factor experiment to investigate the varieties and amount of the binder on the properties of pellets,through the orthogonal experimental method to determine the dry quenching dedusting ash pellets preparation of appropriate type and dosage of binder.Studies have shown that used alone do binder ratio of bentonite content when the mass fraction of 7% of pellets performance is best.At the same time,the test results of dry quenching dedusting ash chemical composition and particle size close to blast furnace injection anthracite.Therefore,the dry quenching dedusting ash used in blast furnace injection technology were studied.Of dry quenching dedusting ash and mixed with other types of coal blend to form the grindability of coal,reactivity,combustion and ignition temperature was studied by means of a series of experiments.Based on the analysis of the performance of the dry quenching dedusting ash used in blast furnace injection,on the basis of dry quenching dedusting ash replacement anthracite is given the best proportion for blast furnace injection and injection in the blast furnace dry quenching dedusting ash key technology.Studies have shown that the ratio of dry quenching dedusting ash of bituminous coal and anthracite used for blast furnace injection when the mass fraction of 2%.