Method for Removing Anode Residues Attached to Spent Anodes Coming from Melt Bath Electrolysis Potlines
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United States of America Patent
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Issued Date -
Dec 18, 2008
app pub date -
Dec 14, 2006
filing date -
Dec 16, 2005
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A process for extracting the anode butt (110) and the thimbles (130) attached to a spent anode or to a rejected new anode, including the following stages: a) the butt (110) is fitted between a stop device (200) and an attacking device (300) said stop device having a first stop (211) blocking the butt, said attacking device being provided, around each stub, with a recess presenting a second stop (225) which blocks said thimbles, the axial distance between the stops being equal to, or greater than, the height of the thimbles; b) the butt is moved so that it come us against the first stop; c) the attacking device is moved: the butt breaks up; d) the fragments of butt are removed; c) the attacking device continues to move: the thimbles are detached from the stubs; f) the attacking device stops and is withdrawn. In two successive, clearly separated stages, the butt fragments and the thimbles are detached, fall and can be sent directly to a special recycling unit.
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