SYSTEM AND METHOD FOR DEGASSING MOLTEN METAL

摘要

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.

主权项

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.