Method of recovering elemental mercury from soils

Details Method of recovering elemental mercury from soils Method of recovering elemental mercury from soils

1991-12-26

1993-02-02

Andrews, Melvyn J.

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

405129, 588231, C22B 4300

Patent

active

051834995

ABSTRACT:
In a method of recovering elemental mercury from soil, the soil contaminated with elemental mercury is first sized in a screening and pressure-washing step. The fine soil particles which pass through the screening device contain essentially all of the elemental mercury. The screened soil particles are fed in the form of a slurry into a gravitational separator. The resulting soil tailings and discharged and a residue comprising heavy materials and elemental mercury is then fed into a gravitational concentrator for a further separation step. The method allows the recovery of more than 99.5% of elemental mercury.

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