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QVA Products

LOG WASHERS

Process Description

Log washers are used to de-agglomerate clay and for cleaning gravel and stone from clay or other contaminants. Feed size -32 +2 mm material.


Process Description

  • Contaminated material is fed into the top of the machine, between the paddles at the bottom of the machine.
  • Material is transported upwards, in an inclined trough by the blades.
  • The trough is inclined between 6 and 8 degrees.
  • This movement causes friction between the stones and the blades. During the process clay (contamination) will be dissolved in the water which is fed through spray nozzles.
  • The product is discharged at the upper trough end.
  • The waste water with dissolved clay leaves the trough at the lower water outlet.
  • Spiral placed blades, reduce loads on drive and transport the stone and rock forward.
  • For removal of organic material and light solids, additional up current water can be injected into the bottom of the tank.

Technical Data

  • Robust reliable design.
  • Stable trough is fabricated from welded steel plates.
  • Wear plates on face walls guarantee long service life.
  • The washing mechanism is driven by two electric motors, and spur gears.
  • Precision synchronous running of the two paddle shafts, Is ensured by gears, running in an enclosed oil bath gearbox.
  • Log shafts have spherical roller bearings in generously dimensioned pedestal bearing housing.

Pictue Gallery

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