Page 24 - Hub-4 Magazine Issue 73

Washing & Screening
Washing 300 tph of construction sand with Terex Washing Systems
Terex Washing Systems have recently commissioned a sand washing plant for Clarence Sands. This newly established operation is now one of the premium sand quarries in Sydney, Australia. The sandstone deposit located in the Blue Mountains produces premium quality construction sand that’s washed and classified using a state-of-the-art Terex Washing Systems wash plant. The bespoke design can produce up to 300 tonnes of quality sand per hour and recycles roughly 95% of the water used during the washing process.
covering the feeder. The H30 Feeder features a hydraulic tipping grid that can be controlled from the cab so that any material stuck on the bars can be cleared.
The wash plant features a H30 Feeder that receives the raw sandstone feed material and distributes it evenly on the main conveyor. At this point any stones or rock that are larger than 100mm are removed from the feed material due to the grid covering the feeder. The H30 Feeder features a hydraulic tipping grid that can be controlled from the cab so that any material stuck on the bars can be cleared.
Tailor Made Sand Screening
With the sand distributed evenly on the main conveyor it makes its way up to the modular 20x8 2 Deck Rinser Screen. This screen is the first of its kind and has been designed specifically to handle the tonnage needed for this operation. A total of 15 spray bars give the material an initial rinse as the vibrating screener shakes the sand and stone down through the polyurethane decks as it is classified by size. The polyurethane decks have a much longer ware life than that of metal decks. Any larger aggregates can pass through the screen onto aggregate and oversize conveyors where they are stockpiled as products for sale.
Any sand, silt, clay or other fine impurities that were present within the feed material is washed to the split catchbox of the screener where the material is gravity fed into one of two FM 200C Sand Plants. Each sand plant receives a separate split, one Coarse Sand and on Fine Sand. The hydrocyclones use centrifugal force to separate the sand from the silt and clay so that it can be transferred onto the high frequency dewatering
The wash plant features a H30 Feeder that receives the raw sandstone feed material and distributes it evenly on the main conveyor. At this point any stones or rock that are larger than 100mm are removed from the feed material due to the grid
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www.hub-4.com March-April 22 - Issue 73