Patent ID: 7700036
Filing Date: 2010-04-20
Classification: B22D,C21B,F27D

Abstract:
1. A launder construction for conveying molten metal including: a lower portion comprising a metal shell having a refractory lining, a cover portion disposed over at least part of the lower portion, the cover portion including at least one electrical resistance heating element for radiating heat toward the covered part of the lower portion, for keeping metal in the covered part of the lower portion in a molten state, wherein the covered part of the lower portion is inclined downward from an upper first end to a lower second end and defines a launder channel for flow of molten metal under gravity from the first end to the second end, and a source of a hot gas flow arranged at the first end of the cover portion for directing the hot gas flow between the cover portion and the lower portion for providing a stagnation pressure to resist flow of gas into the launder channel at the second end of said covered part.