Electrode cap with integral tank cover for acid mist collection

Details Electrode cap with integral tank cover for acid mist collection Electrode cap with integral tank cover for acid mist collection

1994-04-12

1995-11-28

Niebling, John

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

204106, 204278, 204279, 204288, 204289, C25C 706

Patent

active

054704456

ABSTRACT:
In a tank confined electrolysis process, such as electrowinning or electrorefining, having circulated electroplating solution containing sulfuric acid, a multi-element cover system is applied below the electrode conductor connections and above the surface of the electrolyte bath. This cover is evacuated in the interstices below the cover and above the bath at a rate exceeding the stoichiometric ratio causing any leakage to occur into the volume overlying the bath thereby preventing acid aerosol from escape. The rate of evacuation is restricted so that humidity is maintain under the cover and over the surface of the bath to prevent the formation of crystals formed from aerosol droplets which become supersaturated. In a preferred embodiment, a circular weir in combination with gas discharge over the weir to a downcomer is disclosed. Entrainment of air over the weir and into the downcomer is disclosed to provide sufficient pumping for evacuation.

REFERENCES:
patent: 4668353 (1987-03-01), Smith
patent: 5149411 (1992-09-01), Castle
Invention Deisclosure, "Oxide Tankhouse Anodes", Magma Copper Company, Apr. 26, 1985.
Magma Copper Company Interoffice Correspondence, "Oxide Tankhouse Anodes" M. F. Vancas, Apr. 26, 1985 (unpublished).

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