Method for treating spent pot liner
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United States of America Patent
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Nov 22, 2011
Grant Date -
Jun 3, 2010
app pub date -
Mar 26, 2008
filing date -
Mar 26, 2007
priority date (Note) -
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Abstract
The present invention relates to a method for treating spent pot liner material (SPL) containing carbon and/or an inorganic material, the method comprising: providing a plasma furnace having first and second electrodes for generating plasma and a crucible having a non-electrically conductive inner surface, heating the SPL material in the crucible in the presence of a flux material and an oxidant by passing an arc between the first and second electrodes via the SPL material to form a molten slag material and convert at least some of the carbon in the SPL material to CO and/or CO2 and/or incorporate at least some of the inorganic material into the molten slag material.
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