Feeding bunkers are used accumulation the material on feeder. Stock bunkers are used for stocking the final products. The products may be discharged with a hydraulic and pneumatic valve system
What Is a Stock and Feed Hopper?
Hoppers are steel structures that temporarily store incoming material and, via feeders, deliver it steadily to crushers, screens or conveyors. Truck dump hoppers sit at the plant inlet, while surge and product hoppers are used within the circuit and at loading points.
A properly designed hopper smooths fluctuations in truck and loader traffic and keeps the plant continuously fed.
Applications
- Truck dump hopper ahead of the primary crusher
- Surge hopper between crushers
- Product and loading hoppers
- Feed hoppers in mobile plants
Selection Checklist
- Volume calculated from truck capacity and plant throughput
- Wall angle chosen for material flow; bridging prevented
- Inner surfaces protected with wear plates or rubber
- Feeder type designed together with the hopper
Main Spare Parts for Stock and Feed Hoppers
- Wear plates and rubber liners
- Gates, slide valves and vibrators
- Feeder spare parts
- Level sensors and grizzlies
Frequently Asked Questions
How is bridging prevented in a hopper?
With sufficient wall angle, a large outlet, low-friction liners and, if needed, a bin vibrator or air cannon.
How is hopper volume determined?
From truck body volume, plant hourly capacity and loading intervals, choosing a volume that keeps the plant from running empty.
Detailed guides: stock and feed hoppers, stockpile management, feeder types.