Stirring molten metal
First Claim
1. In a molten metal operation, the procedure of stirring a body of molten metal comprising alternately withdrawing molten metal upwardly from the body in a confined space to a level above the body and expelling the withdrawn molten metal into the body as a submerged high velocity jet, and repeating said alternate metal-withdrawing and metal-expelling steps to effectuate continued stirring in the body.
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Accused Products
Abstract
For stirring molten metal such as aluminum in a furnace, metal is alternately withdrawn from and discharged as a jet into the body of molten metal, such being effected by successive application of suction and gaseous pressure to a tubular vessel which projects beneath the surface of the molten metal for advantageously delivering the successive quantities in a horizontal direction over a preferably long path. Effective, reliable stirring of the entire body of metal is achieved with one or more such means, the extent of stirring being controllable; the results include saving of energy and of time for furnace operation, and reduction of melt loss.
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Citations
34 Claims
- 1. In a molten metal operation, the procedure of stirring a body of molten metal comprising alternately withdrawing molten metal upwardly from the body in a confined space to a level above the body and expelling the withdrawn molten metal into the body as a submerged high velocity jet, and repeating said alternate metal-withdrawing and metal-expelling steps to effectuate continued stirring in the body.
- 9. In a molten metal operation, the procedure of stirring a horizontally extending body of molten metal, comprising alternately withdrawing molten metal upward from the body in a confined space to a level above the body and expelling the withdrawn molten metal into the body as a submerged, substantially horizontal, high velocity jet at a low region of the body, and repeating said alternate metal-withdrawing and metal-expelling steps to effectuate continued stirring in the body.
- 13. In a molten metal operation where a melt body of metal is developed to have at least one horizontal dimension substantially greater than the depth of said body, the procedure of stirring the melt body comprising alternately withdrawing a quantity of molten metal from the body into a tubular vessel that projects downward into the melt body from a locality above the surface thereof, said withdrawal being effected through a restricted opening of said vessel at a lower level of the body, and expelling the withdrawn molten metal as a submerged, high velocity jet through said restricted opening into the melt body, said jet being projected along said lower level of the melt body approximately horizontally, and repeating said alternate metal-withdrawing and metal-expelling steps to effectuate continued stirring in the melt body.
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19. In combination with molten metal apparatus which comprises means for holding a melt body:
- apparatus for stirring the molten metal of said body comprising a tubular vessel extending downward into said means and having a nozzle disposed to be submerged in said melt body for projecting molten metal in a substantially horizontal direction, and means for alternately drawing molten metal upward in said vessel to a level above the melt body and causing molten metal to move rapidly downward in said vessel from said level, for alternately and repeatedly drawing a quantity of molten metal from said vessel and expelling said quantity into the body through said nozzle, to stir the molten metal of the body.
- View Dependent Claims (20, 21, 22, 23, 24)
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25. In combination with molten metal apparatus which comprises means for holding a melt body:
- apparatus for stirring the molten metal of said body comprising a tubular vessel extending downward into said means and having a nozzle disposed to be submerged in said melt body for projecting molten metal, and means for alternately applying suction and gaseous fluid under pressure to an upper part of said tubular vessel so that molten metal is alternately and repeatedly drawn into the vessel from the said body and expelled within the body through said nozzle, to stir the metal of the body.
- View Dependent Claims (26, 27, 28)
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29. In combination with molten metal apparatus which comprises means shaped to hold a melt body having at least one horizontal dimension substantially greater than the depth of the body:
- apparatus for stirring the molten metal of said body comprising a tubular vessel extending downward into said means and having a nozzle near the bottom of said means, said nozzle being disposed to project molten metal in a substantially horizontal direction, and means for alternately applying suction and gaseous fluid under pressure to an upper part of said tubular vessel so that molten metal is alternately and repeatedly drawn into the vessel from the said body and expelled within the melt body through said nozzle, to stir the melt of the body.
- View Dependent Claims (30, 31, 32)
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33. In combination with a metal melting furnace which includes means shaped to hold a horizontally extending melt body:
- apparatus for stirring the molten metal of said body comprising a tubular vessel having an upper part accessible outside said means and extending downwardly from its upper part into said means, said tubular vessel having a nozzle near the bottom of said means, said nozzle being disposed to project molten metal through the contained molten metal in a substantially horizontal direction, and means for alternately applying suction and gaseous fluid under pressure to an upper part of said tubular vessel so that molten metal is alternately and repeatedly drawn into the vessel from the said body and expelled within the body through said nozzle, to stir the metal of the body.
- View Dependent Claims (34)
Specification