Salt recovery from aluminum black dross

Details Salt recovery from aluminum black dross Salt recovery from aluminum black dross

1983-10-12

1986-02-11

Bernstein, Hiram H.

Concentrating evaporators

Processes

Spraying

159DIG38, 23302T, B01D 118

Patent

active

045697230

ABSTRACT:
Sodium and potassium chloride consolidated granular salt crystals are formed on a bed of granular salt by spraying, for example, the clarified brine of aluminum black dross upon the heated bed. The bed cascades in a revolving drum and is maintained at a temperature of about 250.degree.-350.degree. F. (121.degree.-177.degree. C.). That is, the bed is maintained at a temperature high enough to evaporate the water from the brine before the brine penetrates the bed and low enough to eliminate entrainment of salt in the evaporated water. An apparatus and process for the recovery of this salt product are claimed.

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Mullin, Crystallization, p. 282, CRC Press, 1972.

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