Specialized metallurgical processes – compositions for use therei – Processes – Electrothermic processes
Patent
1975-02-14
1977-03-22
Lutter, Frank W.
Specialized metallurgical processes, compositions for use therei
Processes
Electrothermic processes
23262, 55 84, 55226, 55228, 75 62, 261DIG9, 266147, 423240, C22B 2100
Patent
active
040134555
ABSTRACT:
A nonferrous metal is heated so as to produce a hot gas that is passed through an evaporative-cooler and, without saturation of the gas, is introduced into a dry-process filter where particulate material is removed. Thereafter this gas is fed to a scrubbing tower whose scrubbing liquid removes gaseous, liquid, and any remaining particulate material from the gas and exits from the tower as a scrubbing liquor. This liquor is clarified and the decantate is recirculated for use as the scrubbing liquid while the sludge is neutralized and sent back to the evaporative cooler. The neutralized sludge is flash evaporated in the evaporative cooler so as to form crystals that are removed from the system either in this cooler or at the dry filter downstream therefrom. A particle filter may be provided between the neutralizer and the evaporative cooler to remove any hard particulate material from the neutralized sludge.
REFERENCES:
patent: 2677439 (1954-05-01), Hedberg
patent: 2835562 (1958-05-01), Boyer et al.
patent: 3502441 (1970-03-01), Hudson
patent: 3518812 (1970-07-01), Kolm
patent: 3619983 (1971-11-01), Rohr
patent: 3695004 (1972-10-01), DeLisio et al.
patent: 3704570 (1972-12-01), Gardenier
patent: 3726065 (1973-04-01), Hausberg et al.
patent: 3820307 (1974-06-01), Haugsberg et al.
Kleeberg Ulrich
Leimkuhler Jurgen
Cuchlinski William A.
Dubno Herbert
Gottfried Bischoff Bau Kompl.
Lutter Frank W.
Ross Karl F.
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