Grizzly Feeders for Mining and Mineral Processing
Australian-made grizzly feeders for controlled coarse feed, fines bypass and crusher feed preparation in mineral processing plants.
VIBRATING FEED CONTROL
Maintains steady feed from hopper to crusher.
INTEGRATED GRIZZLY SCALPING
Separates fines before larger material travels onward.
CONFIGURED FOR IMPACT AND ACCESS
Designed around bar duty, wear zones and access.
Vibrating Grizzly Feeders for Coarse Feed Preparation
Oreflow manufactures grizzly feeders for mining and mineral processing applications where coarse material needs to be fed, presented and partially separated before crushing, screening or transfer.
A standard vibrating feeder is mainly used to regulate material movement. A grizzly feeder adds a bar deck section, allowing fines or undersize material to pass through while larger material continues across the feeder towards the crusher, conveyor or chute arrangement.
This makes grizzly feeders useful where the feed point needs to manage lump size, reduce unnecessary fines entering the crusher and present material more consistently into the next process stage.
Oreflow grizzly feeders are specified around the material being handled, feed rate, top size, fines content, loading method, impact conditions, bar spacing, trough arrangement, drive selection, discharge interface and maintenance access.
Crusher Feed, Fines Bypass and Lump Management
Grizzly feeders are commonly installed ahead of crushers or transfer points where the plant needs feeding and coarse separation in the same unit.
Primary Crusher Feed
Used below hoppers, bins or ROM feed points to help regulate coarse material before it reaches the crusher.
Fines Bypass Duties
Allows undersize material to pass through the grizzly openings where the process benefits from reducing fines reporting to the crusher.
Coarse and Abrasive Material Handling
Trough profile, liners, bar deck arrangement and wear areas can be considered around lump size, abrasiveness, moisture and impact loading.
Replacement Into Existing Plants
Grizzly feeders can be configured around existing hopper geometry, discharge height, crusher inlet, conveyor loading point, chute arrangement and access limitations.
Scalping Feeder Applications
Suitable where the site needs a feeder with integrated grizzly separation rather than a separate feeder and screen arrangement.
Grizzly Feeder, Vibrating Feeder or Scalping Screen?
The right equipment depends on whether the main duty is feeding, separation or feed preparation before the next stage.
Equipment Type | Best Suited When |
Grizzly Feeder | The feed point needs vibration-driven material movement with integrated bar-deck scalping, fines bypass or coarse lump control. |
Vibrating Feeder | The main requirement is consistent material transfer from a hopper, bin or chute without a grizzly bar section. |
Scalping Screen | The process requires a dedicated screening machine for more defined separation, higher screening efficiency or a separate screening stage. |
A grizzly feeder is generally selected when the transfer point itself needs to prepare crusher feed, remove undersize material or manage variable lump size before the next process stage.
What Defines the Grizzly Feeder Duty
Specifying a grizzly feeder starts with understanding how material loads onto the feeder, what needs to pass through the bars, what continues across the deck and how the discharge connects into the surrounding plant.
Specification Area | What Oreflow Considers |
Feed Material | Ore type, lump size, particle distribution, fines content, moisture, abrasiveness and flow behaviour. |
Feed Rate & Loading | Required throughput, loading method, surge conditions, drop height, hopper arrangement and operating duty. |
Grizzly Bar Arrangement | Bar spacing, bar profile, open area, wear expectations and the required separation point. |
Trough & Impact Zones | Trough profile, impact areas, liners, material build-up risk and how material presents across the feeder. |
Drive Arrangement | Drive selection, motor arrangement, vibration duty and how the feeder needs to operate within the available layout. |
Crusher & Transfer Interface | Discharge height, chute handover, crusher inlet, conveyor loading point and surrounding equipment. |
Access & Guarding | Inspection access, bar access, drive access, wear component replacement and practical maintenance clearances. |
Dust & Spillage Control | Skirting, sealing, chute alignment and transfer-point control where required by the application. |
Support Structure | Mounting, support frame, isolation requirements and integration with new or existing plant structures. |
Manufactured for the Feed Point, Not Just the Feeder
A grizzly feeder needs to work with the equipment around it. The hopper, loading method, bar deck, trough, drive arrangement, discharge chute and receiving equipment all influence how effectively the feeder performs.
Oreflow can manufacture grizzly feeders for new plants, replacement projects and selected upgrade scopes where the existing transfer point needs improved feed control, fines bypass, bar access or maintainability.
For existing equipment, Oreflow can assist with selected replacement, modification and refurbishment scopes depending on feeder condition, drawings, component requirements and available plant information.
Support may include guidance around grizzly bars, trough liners, wear areas, drive components, guarding, support structures, access improvements and spare parts requirements where suited to the project scope.
FAQs
What are grizzly feeders used for?
Grizzly feeders are used to feed coarse material while allowing fines or undersize material to pass through a grizzly bar section before the next process stage.
When should a grizzly feeder be used?
A grizzly feeder should be considered when the plant needs controlled feeding and coarse separation at the same transfer point. They are commonly used ahead of crushers, conveyors, chutes and mineral processing equipment.
How is a grizzly feeder different from a vibrating feeder?
A vibrating feeder is mainly used to move and regulate material flow. A grizzly feeder includes a grizzly bar section, allowing undersize material to bypass while larger material continues across the feeder.
How is a grizzly feeder different from a scalping screen?
A grizzly feeder is a feeder with integrated grizzly separation. A scalping screen is a dedicated screening machine used where the process requires more defined separation, higher screening efficiency or a separate screening stage.
Can Oreflow custom manufacture grizzly feeders?
Yes. Oreflow can manufacture grizzly feeders around material characteristics, feed rate, top size, fines content, loading conditions, grizzly bar spacing, trough design, plant layout and maintenance access.
What information helps specify a grizzly feeder?
Useful information includes material type, top size, particle distribution, fines content, bulk density, moisture content, required feed rate, loading method, bar spacing requirements, discharge arrangement, receiving equipment, available space and access requirements.
Can Oreflow support replacement parts or refurbishment?
Yes. Oreflow can support selected spare parts, replacement components, repairs, modifications and refurbishment requirements depending on the grizzly feeder design, equipment condition and project scope.
Related Products
Specify a Grizzly Feeder for Coarse Feed and Fines Bypass
For applications requiring vibration-driven feed control, coarse separation or fines bypass before crushing or transfer, Oreflow can help configure a grizzly feeder around your material, loading conditions, bar spacing and plant layout.
ISO 9001:2015 Certified
Built in WA, delivered worldwide.
