Lime removal from furnace surfaces

Details Lime removal from furnace surfaces Lime removal from furnace surfaces

1978-03-09

1979-08-21

McQuade, John

Metallurgical apparatus

Process

C21B 700

Patent

active

041650654

ABSTRACT:
My invention is particularly adapted for use in steel-making furnaces which have a charge-receiving vessel comprising a bottom and side walls for containing the molten steel and slag, such as the open hearth and electric furnaces. Lime is a major constituent of steel-making slags but it has a tendency to build up on the furnace bottom after successive steel-making operations. I have discovered that by adding a mineral, such as alumina or the like to the built-up lime and applying heat, the lime and alumina will chemically combine to form another mineral having a melting point low enough so that it may be liquified for drainage from the furnace.

REFERENCES:
patent: 1117814 (1914-11-01), Dutton
patent: 3678143 (1972-07-01), Harnish et al.
patent: 3960546 (1976-06-01), Rote et al.
patent: 4010023 (1977-03-01), Bowden

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