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

C - Chemistry, Metallurgy

25

C

C25C 7/00 (2006.01) C25C 1/00 (2006.01)

Patent

CA 2149341

2149341 9412696 PCTABS00032 In a tank confined electrowinning process having circulated electroplating solution containing sulfuric acid, a multi-element cover system (R) is applied below the electrode conductor connections and above the surface of the electrolyte bath (B). This cover is evacuated in the interstices (P) 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 primary cover element constitutes dual hardness extruded, tapered plastic anode caps (30) fastened to opposite sides of the anodes (A) by corrosion resistant fasteners. This anode caps each include an eave member spanning to the cathodes (C). These respective eaves are tapered and extend from a rigid portion of the extrusion fastened at the anode with sufficient span to form a substantially air tight seal with the cathodes immediately after the cathodes are freshly harvested and cleaned. The eaves preferably are sloped to and toward the bath. These eaves are sufficiently flexible to maintain a conformable seal at the inserted cathodes as well as to yield to allow the copper plated cathodes and their required edge strips to be both withdrawn and inserted.

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