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Gary Brown, General Manager


Winstone Aggregates - Slag Processing Plant - NZ

In 2007 Rocktec designed, built and installed a Slag Processing plant for Winstone Aggregates



  • Trio Jaw Crusher
  • Rocktec 12' x 5' Heavy Duty Double Deck Screen
  • Rocktec 10' x 5' Heavy Duty Triple Deck Screen
  • Conveyors
  • Refurbished Plate Feeder


The plant was designed to crush, screen and wash unprocessed EAF slag and work debris. The plant outputs of EAF slag grade 2,3,4, B5 as per TNZ m/6 and an EAF pap5. Slag grades are discharged into precast concrete bunkers which serve a dual purpose as supports for the screening station. 

The plant features a refurbished VSI and vibrating plate feeder with the inclusion of a Trio granulator and pair of Rocktec heavy duty screens. 

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