Plasma-assisted melting
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United States of America Patent
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Mar 13, 2007
Grant Date -
Jun 10, 2004
app pub date -
Jun 2, 2003
filing date -
Dec 4, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Apparatus and methods for plasma-assisted melting are provided. In one embodiment, a plasma-assisted melting method can include: (1) adding a solid to a melting region, (2) forming a plasma in a cavity by subjecting a gas to electromagnetic radiation having a frequency less than about 333 GHz in the presence of a plasma catalyst, wherein the cavity has a wall, (3) sustaining the plasma in the cavity such that energy from the plasma passes through the wall into the melting region and melts the solid into a liquid, and (4) collecting the liquid. Solids that can be melted consistent with this invention can include metals, such as metal ore and scrap metal. Various plasma catalysts are also provided.
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