With the use of a Star screen, or a Trommel screen, 2-Fraction Screening is the process of screening material to create 2 product sizes. Product sizes are “Fines” fraction, and “Overs” fraction and creates a consistent product consumers prefer.
Sometimes referred to as Reclaimed Asphalt Shingles (RAS); Recycled Asphalt Shingles are the byproduct of Asphalt Shingle Grinding. This is done by processing asphalt roofing shingles down to a smaller spec, usually 3/8”, in an effort to use recycled asphalt material in roadways, resulting in reduced road building costs and can lower amounts of material sent to a landfill. A screen helps filter out any larger pieces that cannot be used in RAS applications.
The machine is fed using a wide, flat belt conveyor at the bottom of the hopper, into a chamber (via a metering bar) where a strong air stream aerates the material. Light material (such as plastic) is pulled out of the material stream, and sorted material is then dropped onto two discharge conveyors. The first conveyor has a magnetic head pulley to remove any ferrous materials and the final discharge conveyor has a stone separator to remove stones from the compost or biomass. The waste material is collected into a separate waste collection bin.
The Yard Drive is a wheel drive system that aides in the movement of a wheeled machine in an operation yard. The system consists of a steel wheel that applies pressure to a machines wheel and turns it for machine mobility.