The glass enters the crusher as 1/2" and smaller and supposedly has a density 100lb/ft^3. We are hoping to output a total of 50 tonnes an hour which translates (based on assumption of even output across all screens) to 184ft^3/hr on each screen. I used the manual found here: http://www.screwconveyor.com/SCC%20EngCat10LR.pdf in which they recommended only filling the trough 15% full for this very abrasive material. The clearance between screens on the screener constrains us so I was planning on running 9" standard pitch screws at slightly more than the recommended 55 rpm (or slightly fuller than 15% though in reality the screener is only rated for 40 tonnes.) Also the main reason for the use of screws was because we need something that runs the width of the screen to prevent the blockages we get now by trying to taper the 5' opening into a 8" pipe. I am under the impression that since the screen will be outputting evenly across its width that a feed screw is preferable to ensure even loading however we would ideally be able to reverse certain screws to send product to the left and right of the screener. For manufacturing simplicity and also to allow for a thin bed of product to line the trough to protect it we were planning on designing 10" square troughs (the 1/2" flight tip clearance should be enough since the product is 1/2" and smaller before entering the crusher anyway). The other supposed advantage of a screw was that we could take outputs at any point along its length, is that true? I read somewhere the flighting should have a gap at any intermediate outputs. In summary: 6 Standard pitch 9" screws in 10" square troughs, 15% full, 55 rpm, 5' wide evenly distributed input, reversible, multiple outputs along extent (10-12' long), to move 150-200cu.ft/hr each for a total of 40-50 tonnes of pure abrasives an hour. The boss man wants to know if it will work and I'm not sure. Thank you so much for your help!

Andrew ■