Specialized metallurgical processes – compositions for use therei – Processes – Electrothermic processes
Patent
1997-10-07
1999-08-24
Willis, Prince
Specialized metallurgical processes, compositions for use therei
Processes
Electrothermic processes
75 1054, 75961, 4234991, C22B 702
Patent
active
059420235
ABSTRACT:
Heavy metals substantially free from heavy metal chloride contaminants are recovered from electric arc furnace (EAF) dust by bringing the dust into contact with a carbonaceous reductant utilizing a plasma arc of a DC sealed atmosphere plasma arc furnace so as to volatilize (vaporize) the hazardous heavy metals therein, and then bringing the vaporized heavy metals into contact with an alkali metal gettering agent to thereby form alkali metal chlorides and thereby substantially inhibit the formation of heavy metal chlorides in the off-gas.
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Baranski John P.
Bitler John A.
Larson Harold R.
Exide Corporation
McGuthry Banks Tima M.
Willis Prince
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