* Crusher dust (0-10mm - Basalt) @ 60 TPH is received in Feed Hopper 40CuM capaci- ty. Conveyor, BC-1 from the feed hopper fed to a Bucket Elevator.
* The feed material from the Bucket Elevator is received in the conveyor, BC-2 which feeds it to VSI-60 for Crushing, Shaping and grading of sand particles.
* Crushed material from VSI is received in the feed conveyor and fed to a diffusion feeder.
* Feed material is evenly distributed across the width of the Air Screen with the help of a diffusion feeder.
* Dispersion system at feed ensures uniform dispersion across volume of the chamber for superior classification.
* The high efficiency blower helps forced dispersion of feed material, thereby separat- ing finer material from coarser feed.
* The dust collector fan creates the suction for extracting filler material towards the bag filter.
* The filler material is drawn into the dust collector due to the negative pressure creat- ed inside the chamber. The filler is collected into a hopper of 30 M3 for disposal through dump trucks. (Alternatively, a conveyor below the bag filter can be provided for stockpiling of Ultra fines).
* An optional Pre-Cleaner can be installed between the Dust Collector & Air Classifier to reclaim additional classified sand from the filler dust.
* The mechanical screen mesh of the air screen (with options of cut size of e.g. 2.8, 3.2 mm etc.) recalculates all oversize material back to VSI thru a Belt Conveyor, BC-3 & bucket elevator. Mechanical screen arrangement provided on the lower part of Air Screen helps controlling the top size requirement 2.5-3.0 mm or as desired.
* To control the percent of filler to be retained in the end product, the air volumes are adjusted suitably.
* Final shaped, graded & classified sand is gravitated through the bottom of Air Screen chute on to a Water Adding Mixer (which adds a certain calculated amount of water homogenously to the sand to make it easily transportable). Transfer Belt conveyor (BC-4), and Swivel Conveyor Stockpiles sand.
* The complete system is automated with PLC operations to control the sand quality-its shape, gradation & filler content.
