Grizzly Screens use a set of evenly spaced bars as a screening media. Usually mounted on a decline to promote material flow. They are predominantly used in heavier applications where particle sizes are larger and more prone to blocking. Hence the popularity in quarries and mine sites.
The term may also refer to screening sections on other equipment such as feeders / hoppers with grizzly bars.
The bars do not include any latitudinal supports which prevents a catch point for material. Furthermore, they are designed to be tapered so that product will always have a means to escape if it starts to get caught.
Typical grizzly screen bar decks are made from laser cut mild steel or Bisalloy plate. Alternative grizzly designs are from flat bar, rod or tube.
Common applications of grizzly screens include:
- Rough sizing from a crusher.
- Preliminary sorting in a recycling plant or quarry.
- Removal of oversize rocks that could cause issues in a process.