Pit & Quarry, March 2015
natural seismic forces Clayson says the 100 percent fractured face of the material leads to the concrete and asphalt products that their customers expect System overview Clayson explains how the new overland conveyor system is a great fit for the operation First it allows us to efficiently feed two of the largest crushing circuits in the state of Utah he says Material is transported at up to 3500 tph from the ledge to the crushing plants he adds Summing up the system Clayson describes the operations capabilities as being able to move material from the mountain and deliver it to a jobsite in the same day Transport begins with loaders feeding the material into vibrating grizzly feeders where its sized to 7 in minus and discharged to a hopper which feeds three downhill conveyors of varying lengths 700 800 and 1050 ft Conveyed on 60 in belts the material is transported 400 ft per minute As a gravity fed system the steepest point of the downhill incline is at an 1866 percent grade After traveling 2550 ft the material is fed to a 100 ft transfer conveyor and then onto a 150 ft radial stacker which feeds two tunnel feeders one going to the wash plant and the other to the dry plant With the radial stacker were able to create two surge piles ahead of the tunnel feeders if we need to Clayson says Should we ever have to shut the overland system down having the surge piles will reduce or eliminate any processing downtime CONVEYING www pitandquarry com March 2015 PIT QUARRY 57
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