FIELD: metallurgy.
SUBSTANCE: fuel and metallurgical granules contain iron containing component, carbon containing component and fluxing addition - in form of lime, limestone, dolomite, chalkstone. As iron containing component the ironstone goethite-hydrogoethite oolites dehydrated at 320-380°C are used, and as carbon containing component the fine-grained semicoke of brown coal and/or peat in form of gel/sol with removed mineral part (ash of semicoking) is used. At that the charge components are mixed until homogeneous composition, heated and fed to the grainer of extruder type to produce granules in form of cylinders with diameter and height 8-16 mm.
EFFECT: production of qualitative raw material from irreducible iron ore and low carbonized fuel-recovery raw material suitable to produce several purpose concentrates and metallurgical treatment products.
8 cl, 1 ex
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Authors
Dates
2015-11-20—Published
2014-07-07—Filed