Application
Mechanical Conveying in Grain and Feed Handling
Answer in brief
Grain handling uses mechanical conveying almost exclusively, and the equipment is as old as the industry and as dangerous as it has always been.
The conveyor and the elevator generate dust, enclose it and provide ignition sources, which is the complete recipe.
- Protect and isolate the enclosed equipment.
- Keep the dust from leaving the equipment at every transfer.
- Watch grain damage in screws and at drops.
Reviewed October 21, 2026 · Updated October 21, 2026
The problem
Chain conveyors, belt conveyors and bucket elevators all generate dust, and the elevator leg concentrates it in an enclosed volume with moving parts.
Screws damage grain, which reduces the value of the product.
Desired outcome
A conveying line that delivers the rate, keeps the product and the room separated and can be maintained without dismantling the plant around it.
Process approach
Enclosed chain conveyors handle high rates horizontally with good dust containment, and belt conveyors are used where gentleness matters more.
Bucket elevators provide the vertical lift, and they are the equipment that needs protection, isolation and alignment monitoring.
Aspiration at intake pits, elevator boots and conveyor heads removes the dust where it is generated rather than from the room afterwards.
- Aspiration volumes designed per generation point.
- Protection and isolation on elevators and filters.
- Belt alignment and bearing temperature monitoring.
Selection factors
- Peak intake rate during harvest, which usually sets the sizing.
- Grain damage limit, especially for seed and milling quality.
- Dust explosion characteristics of the grain dust.
- Aspiration capacity and filter protection.
- Entry procedure for bins and enclosed conveyors.
Common failure modes
- Elevator leg without protection or isolation
- Aspiration sized for the room rather than for the generation point
- Grain damaged in a screw conveyor and downgraded
- Misalignment causing friction heat in an enclosed leg
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