Apparatus and a method for tapping metal
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United States of America Patent
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Apr 24, 2012
Grant Date -
May 8, 2008
app pub date -
Oct 29, 2007
filing date -
Nov 3, 2006
priority date (Note) -
Expired
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Abstract
An apparatus and a method for tapping molten metal from below a molten electrolyte layer less dense than the metal is described. The apparatus comprises a pipe comprising a protruding enlarged wall portion at an operative end which is immersed in the molten electrolyte and metal during tapping operation. The enlarged wall portion helps to minimize entrainment of electrolyte residue from the electrolyte/metal interface during tapping. The orientation of the enlarged wall portion may be in the general direction of the crucible.
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