Sizing-dispensing system for abrasive bulk materials
A newly introduced sizing-dispensing system (photo) for abrasive materials receives, scalps, stores and dispenses sand, rutile, zircon and other dense, abrasive materials on-demand, free of dust. Fed by a pneumatic conveying line, the system is equipped with an integral cyclone that separates incoming solids from the air stream. A rotary airlock isolates the pneumatic system from atmospheric pressure and meters material into a vibratory sifter that discharges on-size particles into a surge hopper. With extended vertical sides, the surge hopper stores up to 19 ft3 (540 L) of material, enabling the system’s flexible screw conveyor to dispense material when needed, while reducing the number of on-off cycles required for the independent pneumatic-delivery system to replenish the hopper with material. The enclosed 10-ft (3-m) conveyor, with curved, rigid carbon-steel tubing and heavy-duty round-wire screw, can handle a broad range of free-flowing and non-free-flowing bulk materials, from large particles to fine powders, including products that pack and seize, with no separation of blends. — Flexicon Corp., Bethlehem, Pa.