The vibrating grizzly is used to separate ROM feed material into fractions prior to the primary crushing stage of the process. The pan deck is usually no more that 1 meter long whilst the grizzly bar section can be over 5 meters in length with varying widths from 900mm to 2400mm.
This feeder take a bin load and is often fed by an apron feeder or a pan feeder to feed and scalp the material prior to the primary crusher. Very similar action to the Pan Feeder these robust machines are frequently used in the quarrying and mining industries. The grizzly is generally installed horizontally but to improve material flow they can be installed up to a maximum 10 degree downslope.
Grizzly bars can be arranged as a single, double or even triple row dependent upon the amount of scalping required. Capacities range from 250tph through to 2500tph. The vibrating grizzly can be used as a heavy duty high capacity, non accurate screen due to the grizzly bars being tapered to allow elongated particles to pass through. The Osborn grizzlies operate at a minimum of 4G’s force with an approximate amplitude of 10 mm.