Material
Rice
Answer in brief
In a rice mill the whole commercial argument is the share of whole grains, and conveying is one of the places it is lost.
Milled rice is brittle, and drops, screws and high velocity air all turn head rice into brokens that sell for a fraction of the price.
- Convey gently, especially after milling and polishing.
- Control drying rate, because fissured grains break later in the process.
- Extract dust at husking and polishing, where it is generated.
Reviewed October 21, 2026 · Updated October 21, 2026
Handling challenges
Rice milling is a yield business, and the yield is measured as unbroken grains.
Breakage is cumulative
Each drop, each screw conveyor and each pass through a high velocity line adds brokens.
- Bucket elevators with soft discharge instead of free fall.
- Belt conveyors in place of screws after milling.
- Low velocity pneumatic conveying where air transport is unavoidable.
Drying and fissuring
Grains dried too fast develop internal fissures that survive storage and break at the mill.
The handling system cannot repair this, but gentle conveying limits how much of the damage becomes visible.
Dust and husk
Husking and polishing release husk dust and bran, both combustible and both abrasive.
Aspiration at each machine, protection of the collector and housekeeping that removes settled dust are standard in a modern mill.
Storage
Paddy and milled rice both need aeration and insect control, and milled rice additionally picks up odours.
Clean, sealed silos with monitored temperature keep both quality and safety in range.
What to establish before buying equipment
- Head rice percentage at each stage, measured consistently.
- Moisture at intake and the drying profile.
- Aspiration volumes per machine.
- Storage time and the insect control method.
Material behavior
- Flowability
- Free flowing
- Abrasiveness
- Low to moderate; husk and sand raise wear
- Cohesiveness
- Low
- Moisture behavior
- Rapid drying causes fissures that break during milling
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