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US 4,840,355 AGranted
Slag controlling device for basic oxygen furnaces
OwnerMicheal D. LaBateinventor
Life of this patent
Estimating the term…
Abstract
Basic oxygen furnaces such as used in the production of steel comprise a vessel having a tap hole in an upper side wall section, the vessel being mounted for tilting motion with respect to its normal vertical position. Molten metal and slag thereon are separated in the area of the tap hole when the metal is being tapped by the introduction of gas such as argon or nitrogen through several slag controlling devices comprising refractory bodies defining a plurality of controlled passageways positioned around and about the tap hole.
Claims6
An improvement in a metallurgical vessel having a refractory lining and a tap hole, the improvement comprising:
- a plurality of refractory bodies having planar upper and lower and side surfaces, channels in said side surfaces of some of said refractory bodies positioned for registry with channels in the side surfaces of others of said refractory bodies when said refractory bodies are positioned around said tap hole so as to form a portion of said refractory lining, some of said registering channels defining gas passageways and others of said registering channels defining an opening communicating with said tap hole and means communicating with a source of gas and said channels defining said gas passageways for delivering and controlling the gas delivered to said gas passageways.
Dependencies are inferred from the claim text.