A METHOD FOR THE COMPLEX REPROCESSING BLAST FURNACE PRODUCTION SLAG

The invention relates to the field of ferrous metallurgy, in particular to a method for the complex reprocessing blast furnace production slag, and can find use in utilization of blast furnace production slag with enrichment of raw stock for obtaining cement and separation of metallic particle. A method for the complex reprocessing blast furnace production slag consists of discharging slag melt from furnace into the ladle, separation of slag from metal, enrichment of slag with processing additives, pouring this mixture, grounding thereof. Into the ladle with liquid slag as processing additives the are loaded CaCO3 and Fe2O3 in order that temperature of mixture after that does not reduce lower than liquidus temperature by 100-150 DEGREE C, liquid mixture is poured to leak-tight autoclave with simultaneous granulation thereof with air oxygen at the pressure of 2-4 atm, obtained granules are ground into fraction of size to 0.1 mm and the metal particle is separated in magnetic separator, and remained mixture is used as additive to clinker burning for producing a high quality cement. The invention provides an increase of degree of iron isolation of slag, binding sulphur with calcium oxide and increase of half-product quality from purified blast furnace slag, which can be used as cement clinker component for subsequent obtaining high quality cement.