The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 24, 1999
Filed:
Oct. 07, 1997
Applicant:
Inventors:
John A Bitler, Denver, PA (US);
John P Baranski, Sinking Spring, PA (US);
Harold R Larson, North Quincy, MA (US);
Assignee:
Exide Corporation, Reading, PA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C22B / ;
U.S. Cl.
CPC ...
75 1019 ; 75 1054 ; 75961 ; 4234991 ;
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.