Steel making bath control

Details Steel making bath control Steel making bath control

1998-06-19

1999-12-07

Leung, Philip H.

Industrial electric heating furnaces

Arc furnace device

Furnace body detail

373 85, A61B 104

Patent

active

059995572

ABSTRACT:
This invention is directed to a method and apparatus for thermal homogenization of molten metal in a heath of a electric arc furnace for steel production. The invention addresses the problem of lack of thermal homogenization by providing a lance which directs oxygen gas downwardly towards the surface of the bath and into the molten metal in a direction that diverges away from a direct line to a central region of the hearth through a horizontal divergence angle in the range of 10.degree. to 50.degree. thereby to enhance movement of the molten metal about the hearth and the direction of the gas is inclined downwardly to strike the nominal horizontal plane of the surface of the bath at an inclined angle in the range of 35.degree. to 50.degree. thereby to minimize splashing of the molten metal.

REFERENCES:
patent: 4730336 (1988-03-01), Herneisen et al.
patent: 4827486 (1989-05-01), Brotzmann et al.
patent: 5237585 (1993-08-01), Stenkvist
patent: 5444733 (1995-08-01), Coassin et al.
patent: 5635130 (1997-06-01), Leczo et al.
patent: 5802097 (1998-09-01), Gensini et al.

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