What is the working principle of vibrating grizzly feeder?

EMI Grizzly Feeder is built to withstand the toughest jobs in a quarry, recycling,mine or sand and gravel operation. The Series Grizzly Feeder is designed particularly for continuous use with any hard and abrasive materials. They are backed by years of service proven performance in the mining,aggregates, glass, cement, chemical, wood products and steel industries.

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GRIZZLY FEEDER WORKING PRINCIPLE

Grizzly Feeder consists of vibrating frame, spring, vibrator, motor vibrating device and motor. The vibrator is made of two fixed eccentric shafts whose gears are jogged. When installation, the two gears must be jogged according to the sign. Through drive of the motor, the two eccentric shafts start rotating to produce a linear huge power which forces the feeder to vibrate. Through the vibration, The materials will slip and sling on the funnel, moving forward, when the materials pass the screening part, smaller parts will fall down, avoiding the further crushing, so screening purpose can be reached.

GRIZZLY FEEDER FEATURE

The main purpose of a Vibrating Grizzly Feeder is to feed a primary crusher in a primary application. Vibrating Grizzly Feeders reduce the amount of material going into the crusher by scalping out the product size ahead of the crusher. This reduces the size of the primary crusher required.

The Vibrating Grizzly Feeder provides a continuous feed rate under a variety of loading and material conditions. Vibrating Grizzly Feeders are designed to take heavy shock loads from trucks, shovels and loaders. This type of feeder can be used in quarries, recycling, industrial processing, mining, and sand and gravel operations, as well as in a wide range of processing industries

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Vibrating Grizzly Feeders can be used in rip-rap plant applications to sort ROM material for use on dams, water control and decorative stone applications; for sorting gravel in dredge applications for sized decorative landscaping applications;  to scalp roots out of dirt and other materials to improve the product value for a customer; or to spread material from a conveyor to a wider secondary crusher, such as a Roll Crusher, where no grizzly section is required.

How Vibrating Grizzly Feeders Work

The Vibrating Grizzly Feeder consists of a pan section at the feed end to receive and start segregating the material. The discharge end consists of a grizzly section with openings that allow the undersized material to pass before discharging into the crusher. The feeder is mounted on springs and vibrated via a mechanism located underneath the feeder pan, protecting it from misfed material that fails to reach the feed hopper. The vibration force is angled to the feeder, pointing toward the discharge end. This action of the vibrator forces the material toward the discharge end while segregating the material, causing the finer particles to move toward the bottom of the load.

As the material travels to the grizzly section, the finer material settles to the bottom and passes through the openings in the grizzly. This bypassed material decreases the amount of material going into the crusher, reducing the size of the crusher required as well as the wear inside the crusher. The bypassed material can be combined with the material going through the crusher on the under conveyor. This prescreened material protects the under conveyor from the impact of the material exiting the crusher. The prescreened material can be segregated as a product, or it can be discarded if the fines in the material are a contaminate.

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