Breakfast Cereal

Cereal lines move a very light, very fragile product over long distances, usually through the roof of the building.

Breakage and bulk density

Each transfer breaks flakes, and broken flakes pack tighter in the box.

• Belt and bucket conveying in preference to long pneumatic runs.
• Spiral let-downs into surge bins and packers.
• Lines run full and slow rather than fast and surging.

Checking bulk density at the filler rather than only at the dryer shows how much the conveying system is costing.

Coating and buildup

Sugar and vitamin coatings transfer to chute walls, where they collect fines and eventually fall back into the product as lumps.

Smooth, accessible internals and a cleaning interval based on coating load keep this in check.

Segregation

Multigrain products, clusters and dried fruit separate by size and density at every fall.

Blending close to the filler and minimal free fall keep the box representative of the recipe.

Moisture and crispness

Cereal takes up moisture from humid air within minutes of leaving the dryer, and crispness is the first attribute lost.

Conditioned air in the packing hall and short holding times protect it.

What to establish before buying equipment

• Bulk density at the filler and the acceptable change from the dryer.
• Breakage limit agreed as a measurable percentage.
• Humidity in the packing area.
• Allergen matrix for inclusions and the cleaning standard.

Cereal is bulky, light and fragile, and storage is mostly about not breaking it.

A flake or an extrudate that survives the dryer can still be destroyed by the handling that follows, and broken product is both a yield loss and the fines that block screens and dust the packaging hall. Coated and sugar-frosted products add a second problem: the coating softens with warmth and humidity, and softened coating makes pieces stick together.

• Keep the store cool and dry; warmth and moisture together cost both texture and flow.
• Use shallow beds. Depth compresses the lower layers and crushes exactly the product that has been stored longest.
• Expect the fines fraction to rise through the plant, and remove it deliberately rather than letting it accumulate.

Everything in a cereal line is chosen for gentleness, and capacity comes second.

Each drop, each bend and each change of direction breaks product. Belt and bucket conveying beat pneumatic transfer, and where a pneumatic line is unavoidable it runs in dense phase at the lowest velocity that still moves the product.

• Cascade or spiral chutes wherever material has to fall more than a short distance.
• Low-velocity dense phase rather than dilute phase; attrition rises steeply with speed.
• Screens placed deliberately, so the fines leave at a chosen point instead of at the packaging machine.

The useful measure is breakage across the whole line, not the capability of any single machine.

Cereal dust is explosible, and the fines fraction is where the hazard concentrates.

The product itself is coarse and harmless; what accumulates in the dust collector and on the beams is fine, dry and organic. That is the material protection is designed for.

• Dust collection at transfer points, with the collector protected and isolated.
• Housekeeping with a documented frequency; settled dust is the fuel for a secondary event.
• Allergen control, since cereals, nuts and milk components often share a plant.