MILLING (FLOUR, POWDER)
Size Reduction
Milling (Flour, Powder)
PrerequisiteAlso: roller mill · hammer mill · stone mill · pulverize
Reducing grain or dried material to flour or fine powder. Heat is generated, but rarely enough to act as a kill step.
Typical Hazards
- BBiologicalMycotoxin concentration if mouldy grain not removed upstream; Salmonella in flour
- CChemicalMetal trace from worn rollers; allergen carryover
- PPhysicalRoller fragments, weld debris, screen wire
Typical Controls
- Pre-mill cleaning of grain (scalper, aspirator)
- Mycotoxin testing on incoming grain lots
- Magnet + sieve after mill
- Dust extraction with explosion controls
Regulatory Citations
3 cross-references across 3 documents
21 CFR Part 117
SFCR (SOR/2018-108)