System and method of processing electric arc furnace dust
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United States of America Patent
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Jun 5, 2007
Grant Date -
Apr 21, 2005
app pub date -
Sep 24, 2004
filing date -
Oct 21, 2003
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method of processing electric arc furnace dust includes the steps of preheating a portion of electric arc furnace dust to a temperature of at least 170 degrees centigrade by convection heating to form a preheated dust. The preheated dust is further heated by microwaves until a zinc in the preheat dust vaporizes to form a metal vapor and a residue. The metal vapor is then condensed.
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