Specialized metallurgical processes – compositions for use therei – Processes – Electrothermic processes
Patent
1980-06-03
1982-08-17
Andrews, M. J.
Specialized metallurgical processes, compositions for use therei
Processes
Electrothermic processes
266148, 266149, C22B 4300
Patent
active
043447937
ABSTRACT:
Disclosed herein is an apparatus and process for recovering mercury from a sludge which is discharged, for example, from a mercury-cell process for producing chlorine. In accordance with the invention the sludge is applied to a filter which washes away salt residue and provides an output constituting about 50% solid material. The filtrate is then applied to a dryer for further reduction of the water content, so that the output from the dryer constitutes about 95% solids. A muffle-type oven receives the output from the dryer and roasts the dried material while it is conveyed through the oven in a continuous process. The oven heats the dried sludge material to a temperature of about 1000.degree. F. to vaporize the mercury, such vapor being carried away to a quench tower for further processing.
REFERENCES:
patent: 3596893 (1971-08-01), Foliforov et al.
patent: 3802869 (1974-04-01), Duane et al.
patent: 3814685 (1974-06-01), Rachor
patent: 4087276 (1978-05-01), Generini
patent: 4149879 (1979-04-01), Loo
Perry, R. A., Chemical Engineering Progress, vol. 70, No. 3, pp. 73-80, Mar. 1974.
Chemical Abstracts 84:138929a, May 17, 1976.
Burkett Ronald J.
Dunn Luther L.
Andrews M. J.
Linden Chemicals & Plastics, Inc.
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