Method of introducing additives in steelmaking
AssigneeQual-Chem Limited
InventorsStephen David Bray, Keith Harris
Life of this patent
Estimating the term…
Abstract
The additives, in particulate solid form, are conveyed pneumatically in a divergent stream from a pneumatic gun to impinge upon the molten iron and mix therewith. The gun is spaced above a surface of molten iron such that the pneumatically conveyed stream including the additive has a central axis which is either horizontal (or at an acute angle to the horizontal). The gun is prefereably adjustable for adjustment of the stream angle, and the stream may be either added to pouring metal or to cover a surface of the molten iron.
Claims11
A method for killing slag on the surface of molten steel present in a receptacle, in which additive material including aluminum material in particulate or divided solid form is gas conveyed to the slag in a conveying gas in a divergent stream from conveying apparatus spaced above the slag surface, the conveying gas pressure being tailored with respect to the conveyed additive material to cause the conveyed additive material to penetrate into and substantially remain in the slag.
A method for killing slag on the surface of molten steel present in a receptacle, in which additive material including aluminium material in particulate or divided solid form is gas conveyed to the slag in a conveying gas in an inclined divergent stream from an inclined conveying apparatus spaced above the slag surface, the conveying gas surface being tailored with respect to the conveyed additive material to cause the conveyed additive material to penetrate into and substantially remain in the slag.
Dependencies are inferred from the claim text.