1–2 T/H Fine Grinding Equipment for Aquafeed in Sri Lanka

Prepare the ingredients before asking for finer flour

The proposed grinding stream contains dry fish meal, soybean meal and selected rice bran. Coarse meal and oilcake first pass through the existing animal feed hammer mill. A provisional pulverizer inlet specification of material passing a 1 mm sieve would be checked with the supplier and representative ingredient samples.

Fine wheat flour, starch and micro-ingredients can enter through a separate batching route where their condition permits. Liquid oil is added downstream. This avoids sending every ingredient through the pulverizer simply because it appears in the finished formula.

The starting moisture window for trials is 8–12% on a wet basis, subject to the blend’s behaviour. Fish meal needs checks for bone particles, ash and foreign material. Rice bran needs checks for freshness and residual oil. Coconut meal is considered only in limited, nutritionally suitable trial blends; its fibre and oil can restrict fine grinding.

Magnets and foreign-material removal protect the grinding chamber. Damp lumps, metal and stones require attention before the feeder. An air-swept system does not remove the need to control incoming moisture or fat.

Specify a passing percentage, then select the machine

The proposed flour acceptance target is at least 90% passing a 180 µm test sieve by mass. Residue on a 250 µm sieve is recorded separately to show the coarse tail. Sampling, sample preparation and the sieving procedure must be agreed before comparing results.

This specification describes a distribution. It does not mean every particle measures 150–200 µm. Laser particle analysis and sieve results also need their respective reporting methods identified. Changing the test method can change the apparent result without changing the flour.

The SWFL90 Ultrafine Pulverizer is the candidate for this duty. Its published general capacity is 1–2 tonnes per hour. Acceptance at the proposed fineness requires a material trial; the operating plan initially uses 1 tonne per hour.

The selection gives the processor a defined secondary grinding stage while retaining useful upstream equipment. A larger model would require more electrical capacity, air handling and material supply. Its value depends on sustained demand for qualified fine meal.

The fan and collection circuit belong in the quotation

Inside the ultrafine crusher machine, impact reduces the meal and the classifier separates particles in the air stream. Coarser material returns for further grinding. Product fineness depends on classifier speed, airflow, feed rate and ingredient properties together.

A fixed wheel speed cannot serve as a recipe for every fish-meal or bran delivery. Commissioning should record feed rate, motor current, classifier setting, airflow indicators and outlet temperature for each accepted blend. Finer settings can reduce throughput and increase heat generation.

The quotation needs an induced-draft fan, product collection, discharge airlock, dust filtration and ductwork sized as a circuit. Their motors are additional to the listed 99 kW. Filter resistance and duct losses affect the working airflow, so fan selection needs the actual layout.

Controls should establish extraction before feeding and stop material input if collection fails. Access for cleaning the classifier, inspecting wear parts and maintaining filter elements belongs in the installation drawings.

Measure ground-meal output separately from feed production

At the initial 1-tonne hourly planning rate, six productive hours daily over 220 operating days represent 1,320 tonnes of ground meal annually. This is the pulverizer stream. Ingredients bypassing grinding, subsequent additions and process losses must be included separately when calculating finished-feed output.

For the shrimp-feed application, the downstream product trial targets dry sinking pellets approximately 2 mm in diameter and 3–5 mm long. The existing forming equipment and cutter establish those dimensions. Mud crab development batches require their own agreed pellet presentation and feeding trial.

Fine grinding can support binding, but pellet water stability also depends on formulation, starch or binder choice, conditioning, forming and drying. The comparison should use split ingredient lots with the same downstream settings. Otherwise, an improvement cannot reasonably be assigned to grinding alone.

Water testing should document salinity, temperature, agitation and immersion time. Dry-matter retention provides more information than whether a pellet still looks intact. A two-hour observation can be part of an agreed trial, rather than a guaranteed result from selecting the SWFL90.

Plan the installation around access and available power

The electrical review covers the 90 kW main motor, classifier, feeder and all circuit auxiliaries, including starting demand and simultaneous plant loads. Breaker size, cables and starting method follow that assessment. Motor power alone is insufficient to specify the connection.

Foundation loads, collection equipment height and maintenance clearance require approved drawings. One trained operator is allocated to the grinding section, with shared ingredient-handling and laboratory support. Cleaning intervals follow inspection of deposits and product changes. Wear-part stock is planned from observed condition and replenishment time.

Shipment planning can assess Qingdao to Colombo, followed by road delivery to Puttalam. The packing list should identify the grinding unit, classifier, controls and every quoted collection component. Freight, unloading and commissioning responsibilities need to be explicit in the supply scope.

For fine grinding equipment for aquafeed in Sri Lanka, send RICHI Machinery representative meal samples, moisture and fat analyses, the required sieve specification and tonnes per hour. Include available electrical capacity and a layout of the collection area. Those details allow a proposal built around usable fine-meal output and a complete operating circuit.