Gas treatment of molten metals
First Claim
1. A method of treating a molten metal with a treatment gas, comprising:
- continuously introducing the molten metal into a container having a bottom wall and opposed side walls which form a section of a trough;
providing at least one mechanically moveable gas disperser within the metal in the container;
introducing a gas into the metal adjacent to said gas disperser in a part of said trough forming a treatment zone such that said gas is broken into smaller bubbles by said gas disperser and is dispersed through the treatment zone;
said trough section being such that said section exhibits a static to dynamic metal holdup of less than about 50%.
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Accused Products
Abstract
A method of and apparatus for treating molten metal to achieve effective removal of such unwanted inclusions as gases, alkali metals, entrained solids, and the like. The method comprises continuously introducing molten metal into a container forming a trough or trough section, such as the trough provided between a melting furnace and a casting machine, providing at least one mechanically movable gas dispenser submerged within the metal in the container and introducing a gas into the metal adjacent to the gas disperser in a part of the trough forming a treatment zone such that the gas is broken into smaller bubbles by the gas dispenser and dispersed through the treatment zone. The trough or trough section is such that it exhibits a static to dynamic metal holdup of less than 50%.
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Citations
10 Claims
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1. A method of treating a molten metal with a treatment gas, comprising:
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continuously introducing the molten metal into a container having a bottom wall and opposed side walls which form a section of a trough; providing at least one mechanically moveable gas disperser within the metal in the container; introducing a gas into the metal adjacent to said gas disperser in a part of said trough forming a treatment zone such that said gas is broken into smaller bubbles by said gas disperser and is dispersed through the treatment zone; said trough section being such that said section exhibits a static to dynamic metal holdup of less than about 50%. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification