Precise Bulk Terminal Controls, Accurate Truck Loadout
Bulk materials such as grain, flour, cement, flyash and fracking sand are either milled on-site or shipped to the bulk terminals in rail cars or trucks. On arrival they are unloaded and stored in silos. Finally the operator loads materials from the silos into trucks for local deliveries. Alternatively, the terminal can handle bagging, blending or batching into other products. The bulk terminal software supervises inventory, selects the silos to be filled, runs the filling conveyors and monitors progress.
In truck delivery terminals, a truck scale under one or several silo discharge points sends data to the control system. Alternatively, the installers mount the whole silo on load cells and it can be used as a legal-for-trade scale. The operator monitors incoming trucks and directs them to discharge into one of the silos. While this process continues, he fills trucks with the desired bulk material weight. The Baker-Hughes terminal in Shafter, near Bakersfield CA is typical. This terminal has 12 silos of 610 tons capacity with three truck scales for truck loadout, each handling 4 silos. Read about it in a World Cement Magazine Editorial.