SYSTEM AND METHOD FOR DEGASSING MOLTEN METAL
First Claim
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1. A method for releasing gas into molten metal in a system comprising:
- a vessel for containing molten metal, the vessel comprising a bottom interior surface;
a raised chamber in fluid communication with the vessel, the raised chamber comprising;
(i) a bottom interior surface positioned at least partially above the bottom interior surface of the vessel; and
(ii) a discharge for expelling molten metal from the raised chamber; and
a plurality of degassers positioned in the raised chamber, the plurality of degassers releasing gas into the molten metal in the raised chamber; and
a dividing wall between each of the degassers, each dividing wall including an opening through which molten metal can pass wherein the method comprises the steps of;
(a) creating a flow of molten metal past each of the degassers;
(b) releasing gas from each of the degassers into the flow of molten metal; and
(c) the flow of molten metal passing into a launder or ladle after being degassed without first being retained in another vessel.
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Abstract
A system for adding gas to and transferring molten metal from a vessel and into one or more of a ladle, ingot mold, launder, feed die cast machine or other structure is disclosed. The system includes at least a vessel for containing molten metal, an overflow (or dividing) wall, a device or structure, such as a molten metal pump, for generating a stream of molten metal, and one or more gas-release devices.
42 Citations
20 Claims
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1. A method for releasing gas into molten metal in a system comprising:
- a vessel for containing molten metal, the vessel comprising a bottom interior surface;
a raised chamber in fluid communication with the vessel, the raised chamber comprising;
(i) a bottom interior surface positioned at least partially above the bottom interior surface of the vessel; and
(ii) a discharge for expelling molten metal from the raised chamber; and
a plurality of degassers positioned in the raised chamber, the plurality of degassers releasing gas into the molten metal in the raised chamber; and
a dividing wall between each of the degassers, each dividing wall including an opening through which molten metal can pass wherein the method comprises the steps of;(a) creating a flow of molten metal past each of the degassers; (b) releasing gas from each of the degassers into the flow of molten metal; and (c) the flow of molten metal passing into a launder or ladle after being degassed without first being retained in another vessel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
- a vessel for containing molten metal, the vessel comprising a bottom interior surface;
Specification