METHOD OF EXTRACTING METAL MERCURY FROM MERCURY-CONTAINING WASTES Russian patent published in 2017 - IPC C22B43/00 

FIELD: metallurgy; technological processes.

SUBSTANCE: invention relates to a method of metal mercury extraction from mercury-containing materials, in particular, process slimes, contaminated soils, construction wastes. Method involves initial disintegration of mercury-containing materials, obtaining an aqueous pulp from the mercury-containing materials in a mixing tank, multi-stage inertial separation of metal mercury, herewith at least one stage of the inertial separation is performed in a centrifugal concentrator having a drum with holes, inside which the water pulp is fed, herewith the metal mercury is collected on the outer side of the drum. Centrifugal concentrator drum inner surface is made in the form of two straight truncated cones with a common base arranged between end parts of the drum to make a triangular in cross section channel along the drum circumference in the area of the common base and minimum thickness of the walls. Initial disintegration is performed in a disintegrator with a high pressure system. Material with the particle size less than 2 mm is processed on a concentration table, mercury after the treatment is collected in reservoirs and the sludge product after the concentration table is fed to the centrifugal concentrator.

EFFECT: provided is higher degree of metal mercury extraction from a wide spectrum of mercury-containing wastes, increasing energy efficiency and environmental friendliness.

5 cl, 8 dwg