Homogeneity depends on matching particle sizes
A micro ingredient will not stay evenly distributed in a mash whose particle size is very different from its own. Segregation during conveying and storage is a physical certainty, not a mixing failure, when granulometry is mismatched.
Fines are a cost and a safety issue
Excessive fines reduce pellet durability, increase dust and, in some ingredients, raise explosion and respiratory risk. Specifying a maximum fines fraction is as important as specifying the mean diameter.
Typische industrielle Referenzwerte
| Broiler mash cereals | 700–900 µm | |
| Swine diets | 500–700 µm | Finer improves digestibility, raises ulcer risk |
| Shrimp feed raw materials | < 250 µm | Water stability and ingestion size |
| Micro ingredients / carriers | 100–500 µm | Must match the carrier for homogeneity |
Indicative industry reference values for orientation only — always contract against the delivered lot.
Was zu prüfen ist
- —Geometric mean diameter and standard deviation, not a single sieve pass rate
- —Maximum fines fraction
- —Sampling point — particle size changes with handling
Typische Risiken
- —Segregation of micro ingredients
- —Pellet durability loss
- —Dust generation and handling losses
Häufige Fehler
- —Specifying only 'passes X mm sieve'
- —Ignoring that pneumatic conveying and repeated handling reduce particle size
Häufige Fragen
Is finer always better?
No. Finer particles improve digestibility up to a point, then increase gastric ulceration risk in swine, worsen flow, raise dust and increase grinding energy. The optimum is species-, form- and equipment-specific.
Verwandte Themen
Purity covers everything that should not be in the cargo — foreign matter, other-grain admixture, hulls, soil, packaging debris and deliberate adulterants — and is verified by physical inspection plus targeted analysis.
Digestibility expresses the proportion of a nutrient the animal can actually absorb; it converts an analytical composition into a nutritional value.
Packaging is a technical specification: material, weight, liner, sealing, palletisation and marking determine whether the product arrives at specification and can be traced and handled safely.
Erstellen Sie eine strukturierte Ausschreibung mit Parametern, Toleranzen und Prüfschritten — für Einkäufer kostenlos.
RFQ startenTechnische Parameterbezeichnungen und Analysemethoden bleiben auf Englisch, da sie in Verträgen, Zertifikaten und internationalen Normen wörtlich zitiert werden.
Fachliche Referenz. FeedMatch Group bewertet, empfiehlt und unterstützt keine Hersteller.
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