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Cathode Wash

SP Cathode Wash

Full Face Cathode Wash

Cathodes travel through the SP Cathode Wash System perpendicular to the direction of the wash spray so that the entire copper surface is exposed for cleaning. Direct impingement water contact is a major improvement over traditional cathode washing where the water cascades over the surface from the top and sides.

Wash Stages

  • A prewash stage starts the dissolution of sulphates and other contaminants.
  • Two wash stages incorporate a line of nozzles spraying re-circulated water at the copper face.
  • In the rinse stage, nozzles spray fresh hot water directly onto the copper to remove residual wash water.
  • An integrated drying tunnel utilizes the make-up ventilation air to evaporate the surface water as the cathodes exit the wash booth. This new drying technique reduces energy consumption while producing a drier cathode.
Advantage of Full Face Cathode Washing

No more dropped cathodes – the cathodes are bottom supported during conveyance through the wash system. This eliminates copper pre-stripping and production stoppages in the wash booth.

Reduced energy consumption – the cathodes enter and exit the wash booth parallel to the direction of travel, and the openings in the booth are as small as possible. This means you save energy, as less ventilation air is required to contain the water over-spray, which lowers fan power requirements. Moreover, the process reduces make-up air heating because less water evaporates from the wash booth.

Internal heat recovery – baffles are positioned in the wash tank to segregate the wash water for heat recovery.

Lower water consumption – fresh water consumption in the rinse stage is substantially reduced by direct surface rinse spray and by automatic water shut-off when the conveyor is stopped.

Walk-in maintenance access – man doors and an internal walkway allow full access to the wash booth by operators and maintenance personnel.