Wat is visvoerbreker?
Fish feed crusher refers to a crushing machine specially used to crush fish feed raw materials (zoals vismaaltijd, sojameel, maïs, zemelen, rietje, small fish, enz.) into powder or bran materials that meet the particle size of aquatic animals. It is the first process equipment in the aquatic feed production line.
What is a fish feed crusher?
Fish feed crusher is a special crushing equipment with high-speed rotating hammer, toothed disc or blade as the core working part. Through the composite action of impact, shearing and friction, it crushes block, granular or fibrous feed raw materials into fine particles or powder at one time to meet the particle size and nutritional requirements of fish (such as grass carp, sea bass, garnaal, eel, enz.) at different growth stages.
How fish feed crusher works
• Inlet hopper with adjustable gate to meter flow
• Grinding chamber housing a high-speed rotor (3 000–4 500 RPM) fitted with hammers, pins, or toothed discs
• Perforated screen or stator ring (0.5–5 mm openings) that controls final particle size
• Discharge outlet coupled to a blower or cyclone for dust-free collection
• Drive system: 2.2–110 kW motor, direct-coupled or belt-driven
Workflow: raw material → hopper → rotor impact / shear → screen classification → particles fine exit → next batching / mixing / pelleting step.
What types of fish feed crushers are there?
• Hammer mill: drop-shaped chamber, versatile, 80 kg/h–10 t/h, 0.5–5 mm output
• Pin / disc mill: toothed rotors for high-fat or fibrous materials, 50–500 kg/h, 40–120 mesh
• Ultra-fine pulverizer: vertical, screenless, air-classified, 74–250 µm, 2–5 t/h, ≤30 kWh/t
• Food-grade stainless mill: 304 SS contact parts, 20–200 mesh, 100–2 000 kg/u, zero metal contamination
Particle-Size Requirements vs. Species
• Larvae / shrimp post-larvae: 95 % < 100 gaas (150 µm)
• Juvenile fish / garnaal: 80 % < 80 gaas (180 µm)
• Grow-out fish: 80 % < 40 gaas (425 µm)
• General pond feeds: 80 % < 20 gaas (850 µm)
Fish feed crusher selection pperation tips
• High-oil fish meal → choose pin or ultra-fine mill to prevent screen blinding
• Crop straws → pre-cut and use hammer mill with wide-screen
• Capacity match: Kleine boerderijen (<1 t d⁻¹) → 2.2–7.5 kW; feed plants (>5 t h⁻¹) → 55–110 kW with pulse dust collector
• Regularly check/replace hammers, screens, pins; maintain dynamic balance
• Install magnetic separator and enclosed discharge; keep dust emission ≤10 mg m⁻³
One-sentence takeaway
A fish-feed crusher is the first critical step that turns bulky raw materials into fine, fish-ready powders—improving feed conversion and cutting feeding costs by 10–15 %.
How to choose a suitable fish feed grinder?
Raw material differences:
• High-fat fish meal → choose toothed disc type or ultra-fine grinding to prevent screen blockage;
• Straw → choose hammer type, cut into sections before grinding.
Output matching:
• Small farms (<1 t/d) → 2.2–7.5 kW single machine;
• Continuous production in feed factories (>5 e) → 55–110 kW with pulse dust removal system.
Consumable parts: hammers, screens, and gear rings need to be checked and replaced regularly to maintain dynamic balance.
Safety and environmental protection:
• Install a magnetic separator to remove metal impurities;
• Closed discharging + bag dust removal, dust emission ≤10 mg/m
