Loading patent…
AssigneeAllegheny Ludlum Corporation
InventorJames D. Calos
Estimating the term…
A method and apparatus is provided for temporarily retaining slag and nonmetallic particles in a tundish while molten metal is being transferred through the tundish to other desired vessels. In particular, a meltable dam is placed into an opening between the chambers in a tundish, and the meltable dam retains an accumulation of molten metal in the pour chamber of the tundish with the slag and nonmetallic particles floating on top of that level such that the slag and nonmetallic particles are above the opening between the chambers of the tundish. The dam then completely melts and allows the transfer of molten metal through the opening. The slag and nonmetallic particles are retained in the pour chamber, however, because the molten metal being transferred into the pour chamber maintains the level in that chamber above the opening until almost all of the metal has been transferred into and through the chamber. In this manner, problems associated with the transfer of slag and nonmetallic particles with the first flow of molten metal in VIM teeming operations are eliminated.
A method for transferring molten metal without any slag and nonmetallic particles, the method comprising the steps of:
In a method for transferring molten metal, the method comprising the steps of (1) transferring molten metal into a first chamber of a vessel, (2) transferring the molten metal from said first chamber to a second chamber in the vessel through an opening which interconnects said first chamber and said second chamber, and (3) transferring the molten metal from said second chamber to a desired other vessel, the improvement comprising the step of preventing the flow of the molten metal through said opening with a meltable dam until said molten metal level rises above said opening, wherein said meltable dam is folded along a line generally on the center axis to form a v-shaped trough.
Dependencies are inferred from the claim text.