Chemistry: electrical and wave energy – Processes and products – Electrostatic field or electrical discharge
Patent
1976-06-30
1977-08-02
Andrews, R. L.
Chemistry: electrical and wave energy
Processes and products
Electrostatic field or electrical discharge
C25C 116
Patent
active
040394085
ABSTRACT:
A method of electrolytically recovering zinc is described wherein the pH value of a neutral leaching solution is adjusted to about 1 to 3 before being mixed with a circulating electrolyte, a downward stream of the neutral leaching solution in the form of a spray within a first gas-liquid contact type cooling tower is supplied, an upward stream of cooling gas is supplied under pressure at high speed from a lower part of the cooling tower in countercurrent relation to the downward stream of neutral leaching solution, thereby subjecting balls of light weight which are packed within the cooling tower to floating and rotating movement for bringing the neutral leaching solution in the cooling contact with the cooling gas on the surface of the balls so as to cool the neutral leaching solution while, at the same time, removing impurities depositing in gel form on the balls by utilizing the self-cleaning action of the balls. The cooled neutral leaching solution is added to supplement the part of the circulating electrolyte discharged from a circulating tank, and a downward stream of solution mixture in spray form is supplied within a second gas-liquid contact type cooling tower in countercurrent relation with an upward stream of cooling gas, thereby subjecting similar balls to floating and rotating movement, thereby cooling the solution mixture while removing impurities.
REFERENCES:
patent: 3826648 (1974-07-01), Bodson
Andrews R. L.
Mitsui Mining & Smelting Co. Ltd.
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