METHOD OF STEEL PRODUCTION Russian patent published in 2014 - IPC C21C5/28 C21C7/00 

FIELD: metallurgy.

SUBSTANCE: proposed method comprises steel casting at casting plant, teeming the melt into ladle, steel refining during teeming and finishing ay furnace-ladle assembly. During teeming into ladle, added is the flux thereto in amount of 4-10 kg per tom of steel and containing 40-85% of Al₂O₃ and 2.0-12.0% of CaO, aluminium in amount of 1.0-1.9 kg per ton of steel, lime in amount of 5-12 kg per ton of steel, silicon and manganese-containing ferroalloys in amount of 5-10 kg per ton of steel. During finishing, aluminium chop in amount of 0.3-2.0 kf per ton of steel is added to slag. Calcium-containing materials in amount of 0.05-0.2 kg per ton of steel are added to metal. At tapping. CaO/Al₂O₃ ratio in slag should not exceed 3.5. Note here that during finishing silicon carbide is added to metal in amount of not over 1.2 kg per ton of steel.

EFFECT: higher purity of steel as far as corrosive non-metal inclusions are concerned, longer life of pipes.

3 cl, 1 tbl