Composition and process to create foaming slag cover for molten steel
AssigneeMetro Materials Corporation
InventorsWilliam B. Simpson, Jr., David F. Lundy, R. L. Parnell, Charles W. Snodgrass, Edward B. Miller, John M. Harvey
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Abstract
Slag formed in steel melt operations is foamed to create a protective cover using a composition comprised essentially of calcium oxide.
Claims14
A method of foaming the slag generated in a steel making electric arc furnace after melt-down of steel raw material comprising the steps of:
- when the amount of said slag atop said melted steel is at least 4 inches deep, introducing a foaming agent into the furnace slag, the composition of said agent comprising essentially calcium oxide (CaO) and free carbon (C) particles.
A method of foaming the slag generated in a steel making electric arc furnace after melt-down of steel raw material comprising the steps of:
- when the amount of said slag atop said melted steel is at least 4 inches deep, introducing a foaming agent into the furnace slag the composition of said agent comprising a mixture of:
- 68% calcium oxide, 4.1% magnesium oxide, 17.5% free carbon, 3.7% silicon dioxide, 1.3% sulphur and miscellaneous oxides from the group consisting of AL.sub.2 O.sub.3, FE.sub.2 O.sub.3, TiO.sub.2, P.sub.2 O.sub.5, and MN.sub.3 O.sub.4.
A composition for foaming the slag in molten steel comprising a mixture of essentially calcium oxide (CaO), and free carbon (C) and Silica (SiO.sub.2).
Dependencies are inferred from the claim text.