C - Chemistry – Metallurgy – 10 – B
Patent
C - Chemistry, Metallurgy
10
B
C10B 53/00 (2006.01) B09C 1/06 (2006.01) C03B 5/00 (2006.01) C03B 5/02 (2006.01) C03C 1/00 (2006.01) C22B 4/00 (2006.01) C22B 7/00 (2006.01) C22B 13/02 (2006.01) F23G 7/14 (2006.01) H01M 10/54 (2006.01) A62D 3/00 (2006.01)
Patent
CA 2124005
21 ABSTRACT Lead-contaminated soil and battery casings are remediated using a plasma arc furnace which pyrolyzes the soil and waste battery casings so as to form a vitrified slag and a combustible gas, respectively. The combustible gas along with volatilized lead (and other heavy metals which may be present) are transferred to, and used as a primary fuel by, a conventional smelting furnace. The volatilized lead that is entrained in the combustible gas is thus transferred to the recovery and environmental protection/control equipment associated with the smelting furnace. The soil, on the other hand, is converted into a non-toxic (i.e., according to the Toxicity Characteristic Leaching Procedure) vitrified slag by the plasma arc which may be crushed and used as a commercial material (e.g., roadway aggregate, asphalt filler material and the like) or simply transferred to a landfill where it poses no environmental threat.
Baranski John P.
Bitler John A.
Borden Ladner Gervais Llp
Exide Corporation
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