B - Operations – Transporting – 03 – D
Patent
B - Operations, Transporting
03
D
B03D 1/02 (2006.01) B08B 7/04 (2006.01) C22B 43/00 (2006.01)
Patent
CA 2097372
ABSTRACT OF THE DISCLOSURE Describes a process for separating metallic mercury from soil containing same by producing an aqueous pulp of the contaminated soil in a mixing tank (12), screening the pulp in screening means (14) to separate a coarse fraction, further screening the pulp in screening means (17) (19) to produce a fines fraction, charging said fines fraction to solid-solid separating means (20)(24) to provide a first aqueous soil slurry (83) that is substantially free of metallic mercury and a second aqueous soil slurry (75) (81) containing metallic mercury, charging the second aqueous soil slurry to froth flotation cell means (28), thereby to provide a metallic mercury-containing froth (90) and an aqueous soil slurry (87) substantially free of metallic mercury, removing the froth from the flotation cell, and separating metallic mercury that settles out of the froth (95). Soil slurry substantially free of metallic mercury is flocculated (32), dewatered (35), filtered (36) and removed to a landfill (9).
Borden Ladner Gervais Llp
Cyr Benoit
LandOfFree
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