Method and article of manufacture for controlling slag carry-over during tapping of a heat in steelmaking
OwnerJohn W. Schwerinventor
Life of this patent
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Abstract
A steelmaking process and an article of manufacture for use therein, comprising the addition to the steelmaking vessel or caster tundish prior to the tapping of the finished steel of a heat-stable material having a density such that said material floats substantially at the interface between the slag and steel, said material being in the physical form of at least one annular disc. The heat-stable material may also be added to the vessel in the physical form of at least one discrete piece in addition to the annular disc.
Claims5
In a steelmaking process in which a layer of liquid slag is formed on the liquid steel in the steelmaking vessel during said process, whereafter at the completion of the heat said liquid steel is removed from said vessel through a side taphole, the improvement comprising the addition to said vessel prior to tapping of a spatially unconstrained, heat-stable material having a density such that said material floats substantially at the interface between said slag and said steel and effects unrestricted spatial movement with respect to said interface and said taphole during tapping, said material being in the physical form of at least one annular disc.
Dependencies are inferred from the claim text.