Specialized metallurgical processes – compositions for use therei – Processes – Free metal or alloy reductant contains magnesium
Patent
1995-06-20
1997-02-11
Andrews, Melvyn
Specialized metallurgical processes, compositions for use therei
Processes
Free metal or alloy reductant contains magnesium
75961, 266146, 95186, 95188, C22B 302, C22B 304
Patent
active
056016328
ABSTRACT:
A method and an apparatus for the purification of residual products from flue gas purification plants.
Between a wet-desulphurization plant (1) for flue gas and an associated waste water-treatment plant (2) for the purification of the water used in the wet-desulphurization there is inserted a leaching apparatus (3, 7, 4) for the purification of hazardous residual products supplied through a conduit (6) from flue gas purification in dry-and and semidry-desulphurization plants by means of waste water supplied through a conduit (5) from the plant (1). The hazardous residual products supplied through the conduit (6) are admixed with the waste water supplied through the conduit (5) in a container (3) whereupon the mixture is conveyed to a filtration step (4) wherein the soluble salts and leachable heavy metals are separated from the filter cake produced and said filtrate being, through a conduit (8) conveyed to the waste water-treatment plant (2) whereas the leached out filter cake, now in the form of a waste dump-safe residual product, is conveyed to a deposit site through a conduit (9).
REFERENCES:
patent: 4234429 (1980-11-01), Rhodes et al.
patent: 5039498 (1991-08-01), Vicard
patent: 5082493 (1992-01-01), Barrett et al.
Andrews Melvyn
Fls Milj.o slashed. A/S
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