Flexible minimum energy utilization electric ARC
OwnerJohn A. Guliana, Guy A. Brada +3inventors
InventorsJohn A. Guliana, Guy A. Brada, Christian H. Ericksen, Bruce C. Liimatainen, Algirdas A. Underys
Life of this patent
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Abstract
In an electric arc furnace system for making steel, a method and structure (1) for eliminating teeming hang-ups and ensuring temperature homogeneity in a ladle which teems into an ingot mold by gas purging at all possible steps under both atmospheric and vacuum conditions, and (2) for preventing non-metallic inclusions from appearing in the final product by deflecting the granular material in the teeming ladle well block away from the ingot mold by a heat resistant but combustible deflector just prior to entry of the teeming stream into the ingot mold.
Claims10
1-9. (canceled)
17-21. (canceled)
In a system for providing instant teeming flow from a molten metal reservoir into a molten metal receptacle means,
- a reservoir of molten metal having a teeming opening at a low point in the reservoir,
- a granular material in a quiescent state in the teeming opening up to a height substantially level with the top of the teeming opening,
- a heat destructive granular material deflector over the molten metal receptacle means in alignment with the teeming opening,
- slide gate means for terminating the quiescent state of the granular material whereby said granular material may move downwardly into contact with the deflector under gravity, and
- said deflector being arranged to deflect the granular material away from contact with the molten metal receptacle as molten metal from the reservoir approaches the molten metal receptacle means whereby the deflector may be destroyed under the influence of ambient heat thereby allowing the molten metal in the molten metal reservoir to stream unobstructedly into the molten metal receptacle means in the absence of the granular material.
Means for providing instant teeming flow from a molten metal reservoir in a molten metal receptacle means, said means including
- means for providing a reservoir of molten metal having a teeming opening at a low point in the reservoir,
- means for filling the teeming opening with a granular material in a quiescent state to a height substantially level with the top of the teeming opening,
- means for providing a heat destructive granular material deflector over the molten metal receptacle means in alignment with the teeming opening,
- means for terminating the quiescent state of the granular material by moving said granular material downwardly into contact with the deflector under gravity,
- means for deflecting the granular material away from contact with the receptacle means by contact of the granular material with the deflector as molten metal from the reservoir approaches the receptacle means, and
- means for destroying the deflector under the influence of ambient heat
- whereby molten metal from the molten metal reservoir streams unobstructedly into the molten metal receptacle means in the absence of the granular material.
Dependencies are inferred from the claim text.