Gas-fired steelmelting process

Specialized metallurgical processes – compositions for use therei – Processes – Producing or treating free metal

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75958, C21B 1310

Patent

active

050663267

ABSTRACT:
Process and apparatus for the rapid efficient melting of solid ferrous metal scrap without direct exposure to water vapor, carbon dioxide, oxygen or oxygen-containing gases, using natural gas and/or other caloric gaseous fuels. The apparatus includes a furnace having a refractory base, means for introducing ferrous metal such as solid steel scrap to the well area, means for providing a slag layer over the solid steel scrap, and gas burner means for emitting one or more forced gas flames for superheating the slag layer to a liquid which covers the scrap and for agitating and circulating the molten slag to form a highly-efficient heat-transfer medium for melting and refining the steel scrap while it is insulated against contact with gases, particularly water vapor, carbon dioxide, oxygen or oxygen-containing gases. The process may operate continuously and can recover heat for scrap preheating, turbine power and other efficient uses.

REFERENCES:
patent: 4422872 (1983-12-01), Geskin
patent: 4861369 (1989-08-01), von Bogdandy et al.
patent: 4877449 (1989-10-01), Khinkis
patent: 4913734 (1990-04-01), Romenets et al.

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