Sinking Fish Feed Pellet Machine

RICHI sinking fish feed machine is renowned for its robustness and can make high-quality pellets from 0.8 mm to 12mm. We have different sinking fish feed pellet mill and sinking fish feed pellet extruder machine model which is tailor-designed for a diverse aqua feedproduct.

Sinking fish feed pellet machines can only make fast sinking feeds. For example, milkfish feeds are still common to be made on sinking fish feed pellet production lines thanks to advancements in pre-conditioning and post-conditioning technology.

However, sinking fish feed extruder machine offers more products characteristics from fast sinking, slow sinking, and floating.

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  sinking fish feed Pellet Machine (with 2-layer conditioner)

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  sinking fish feed Pellet Machine (with 3-layer conditioner)

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  sinking fish feed extruder Machine (twin screw type)

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  sinking fish feed extruder Machine (single screw type)

RICHI sinking fish feed pellet making machines are born from years of experience and continuous improvements to ensure high production efficiency at the lowest cost.

RICHI has standardized the fish pellet die and the roller shell for aqua feed production. The compression ratio of our pellet die is specially designed to ensure compact and tough pellets with higher PDI. The roller shells are designed individually for each different hole size.

• The positioned ring die of the sinking fish feed pellet machine is easy to load and unload could be equipped with lifting device.
• The sinking fish feed pellet machine uses high quality alloy steel ring die which produced by international advanced processing technology.
• The sinking fish feed pellet machine is suitable for producing all kinds of high quality aquatic feed.
• The sinking fish feed machine adopts continuous and stable work, very low noise. Stable torque, strong vibration absorbtion and isolation.
• The sinking fish feed machine is equipped with proper speed of ring die according to sinking fish food.
• The design of the sinking fish machine can increase the work area of ring die, improve the capacity.
• The sinking fish feed pellet machine is equipped with automatic control system. Automatic oil lubricating system to make oil adding easier.

RICHI sinking fish feed pellet mill is well-known because we value the importance of pre-conditioning very much and have a complete range of different styles of pre-conditioner for particular purposes. Our design of conditioning and are born from years of experience and continuous improvements to ensure high production efficiency.

During the conditioning process, the mixing action of raw material with moisture and heat in suitable retention time helps to increase water stability in aqua sinking fish feed, increase durability and PDI in fish feed.

Moreover, the superior conditioning system of sinking fish feed pellet machine lowers the friction force, which eventually reduces wear on the die holes and rollers.

RICHI has standardized the pellet die and the roller shell for sinking fish feed production. We specially designed the pellet-dies compression ratio to ensure compact and durable pellets with higher PDI. The roller shells are designed individually for each different hole size.

RICHI sinking fish feed pellet machine system for aqua feed consists of a feeder, pre-conditioners, a pelleting machine, and a post-conditioner. Under the action of the squeezing force of the ring die and pressure roller of the sinking fish feed machine, the powders with a certain temperature and humidity are close to each other and rearranged.

The air contained in the powder particles is gradually squeezed away, and the powder close to each other, the connecting force increases, and finally it is pressed into pellets by sinking fish feed pellet machine with a certain density and strength.

In the granulation process of the sinking fish feed pellet machine, the protein and sugar in the feed become plastic when heated, and the starch is partially gelatinized. Therefore, the granulation process of the sinking pellet feed machine for fish can be said to be an extrusion thermoplastic process, but after the feed is granulated, the gelatinization degree of the starch is generally about 30% or lower, and this is mainly accomplished by steam conditioning.

If you want to increase the gelatinization degree of starch, you must extend the conditioning time or use a conditioning tank. Compared with a sinking fish feed extruder machine, the degree of gelatinization improved by the sinking fish feed machine is limited. However, the sinking pellets for aquatic animals produced by the sinking fish feed pellets machine is very suitable for sinking aquatic animals and benthic prawns and herrings.

Some sinking fish feed manufactuers who process sinking fish food will configure a sink fish feed pellet machine after the pelletizing section, but we generally do not recommend this. After crushing, the surface of the sinking fish food pellets is rough, and it is easy to absorb water to collapse the sinking fish food pellets, which affects the stability of sinking fish feed in water.

If the powder is directly pressed into small fish sinking pellets, the surface of the fish sinking pellets is smooth and not easily corroded by water, which can improve the stability of the fish sinking pellets in water.

Both pelleting process and extrusion process are adaptable to aqua sinking fish feed production. As the development of aquaculture, however feed extrusion technology is more and more popular in the aquafeed production because of its well- balanced nutrition, the excellent water stability, and most of all, the environment friendliness.

01

Raw material receiving and cleaning

The designed capacity for raw material intake in an aquafeed mill shall be 2~3 times of its production capacity. For materials of different properties, special cleaning operation should be carried out where it is received.

For instance, granular materials can be cleaned with a RICHI Drum Precleaner and the powdery materials with a RICHI precleaner, under the assistant of an aspiration system.

02

Primary grinding system

As the pretreatment of fine- grinding or ultra-fine grinding in aquafeed production, primary grinding (or coarse grinding) is designed to diminish the difference in and the variation of material particle size, to improve the working performance and working efficiency of the pulverizer thereof, and to ensure constant quality of finished products.

03

Primary proportioning and batch mixing system

In such processing section, the major ingredients, i.e. the ingredients of larger proportion in aquafeed formulation, are batched by an electronically controlled proportioning system, and then sent to the mixer for primary mixing.

Primary proportioning and batch mixing are designed to limit the variation of material particle size before ultra-fine grinding, so as to further ensure constant quality of finished product.

The proportioning bins in this process section should be designed to have a storage capacity to sustain the 4~6 hours’ uninterrupted production of subsequent process.

04

Secondary grinding system

Eating little, short digestive tract as well as bad digestibility of the aquatic animals require finely ground feed particles.

Secondary grinding usually is executed by a specialised pulveriser (ultra-fine grinding) or a fine-grinding hammermill in RICHI sinking fish feed production line or aqua feed production line solutions.

05

Secondary proportioning and batch mixing system

The finely ground ingredients are fed into the other mixer for secondary batch mixing after proportioning. Usually, a manual feeding inlet is provided for adding micro ingredients into the secondary mixing mixer. And also two liquid application devices are furnished for adding water and oil respectively.

06

Conditioning

Preconditioning is used to properly condition the material before the follow-up extruder cooking stage so as to supplies the extruder with a uniformly mixed and hydrated material by mechanical stirring and adding saturated steam.

Under the turning and blending efforts of conditioner paddles, the moisture content of mash is uniform and the temperature is steady eventually.

07

Pelleting & Extrusion

The process of pelletization happens inside a sinking fish feed pellet mahcinel. Extrusion process is mainly executed by an extruder that is basically composed of a stationary barrel housing in which such elements as segmented screws and shearlocks rotates, fulfilling extrusion operation together with a disc and knife assembly.

08

Drying system

Once the product leaves the extrusion system, a drying step is required to remove the excess water and return the product back to a shelf-stable moisture condition. It is recommended to apply a crossflow dryer for drying wet extrudates, in which moisture and heat of product is exchanged with a perpendicular airflow.

09

Coating and cooling system

If necessary, liquid fats, flavours, and vitamins can be added externally to extruded feeds after drying. Post liquid application by coating will not only avoid the risk of damaging heat sensitive ingredients, but also improve the palatability and reduce powder generation of the finished product.

After coating, pelletized and extruded sinking fish feed pellets are cooled as required.

10

Bagging system

When bagging aquafeed, the amount of air entrained in the bag or that penetrating into the bag should be controlled to a minimum, so as to prevent feed from oxidation and deterioration.

Therefore, it is recommended to close the bag through sewing plus heat sealing (plastic film lining), which can prolong the shelf life of finished product by 50-100%.

Whether it's sink or float, RICHI floating and sinking fish feed making machines and fish feed mill will keep your aqua feed pelleting production ahead.

sinking fish Feed hammer mill

Capacity:
3-25T/H

Main Power:
30-160KW

sinking fish feed mixing machine

Capacity:
250-2000KG

Main Power:
4-55KW

Rotary Distributor

Capacity:
30-60T/H

Main Power:
0.55KW

ultra fine powder grinder

Capacity:
1-12T/H

Main Power:
90-220KW

sinking fish feed pellet machine

Capacity:
0.1-6T/H

Main Power:
22-315KW

sinking fish feed Extruder machine

Capacity:
0.03-12T/H

Main Power:
0.75-355KW

sinking fish feed dryer machine

Capacity:
2-12T/H

Main Power:
44.3-71.8KW

sinking fish feed Pellet Cooler

Capacity:
3-25T/H

Main Power:
30-160KW

sinking fish feed screening machine 

Capacity:
3-20T/H

Main Power:
1.5-5.5KW

High Square Screen

Capacity:
3-20T/H

Main Power:
1.5-5.5KW

sinking fish feed Spraying Machine

Capacity:
3-15T/H

Main Power:
22KW

sinking fish feed Packaging Machine

Speed:
6-12 Bags/Min

Main Power:
1.1-5 KW

• Raw material receiving system
  Bulk intake hopper and conveying system with filter.
• Raw material silos and hoppers
  Hopper scales for weighing individual ingredients in formula mixtures.
• Fish feed grinding machine
  Fine grinding if often used in the aqua feed industry when producing starter feed or scrimp feed. 3000/3600 rpm hammer mill with small hammerto-screen clearance. Screen perforations as small as 0.75 mm. Capacity: up to 25 t/h.
• Aspiration filters
  Fully automatic, continuously operating bag filters cleaned by compressed air. A variety of filters support any need for process air filtration throughout the entire floating and sinking pellets fish feed plant.
• Automatic batching and weighing system
  For weighing/metering premix and micro-ingredients in fish feed making formula mixtures.
• Fish feed mixer machine
  Optimix paddle mixer for dry mixing or for mixing with large amounts of added liquids. Capacity: up to 40t/h. Batches: up to 6 t.
• Conditioner of the fish feed pellet machine or fish extruder machine
  Conditioners for pre-conditioning with addition of liquids and steam, providing optimum mixing and retention time. Dual conditioning for perfect blending with liquids and extended conditioning time, as well as availability of CRT first-in-first-out solutions. Hot start conditioning also avaliable.
• Fish feed pellet machine or fish extruder machine
  High-performance fish feed extruders and fish feed pellet machines, providing low operating costs combined with exceptional feed quality and unique process flexibility. Capacity: up to 20 t/h.
• Fish feed dryer machine
  Combi-zone dryer for the improvement of fish feed, covering a variety of production capacities (up to 30 t/h.) and product sizes (0.6-40 mm). Additional unique features minimize the spread of product moisture and make it energy efficient.
• Coater
  Vacuum coater VAC - simple design for unique results, e.g. adding large amounts of liquids, no product damage, and production of special products. Capacity: up to 25 t/h and up to 35% added oil/fat.
• Fish feed cooler machine
  Vertical or horizontal fish feed coolers - orientation determined by the customers applications and preferences. Capacity: up to 20 t/h.
• Electronic Control System
  Electronic Control System are available as basic control systems, as fully automatic systems for control of each fish feed processing machine or complete floating and sinking pellets fish feed plants. The system ensures cost-effective processing and consistent feed quality. The floating and sinking pellets fish feed plant design with integrated automation solutions provides traceability of ingredients and process parameters.

Richi Machinery is one of the fish feed plant and floating fish feed machine manufacturers in China, we have rich experience of providing complete fish feed plant solutuions and fish feed making machine for various fish feed, shrimp feed, etc.

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  2*15T/H Sinking Fish Feed Processing Line in Vietnam

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  5T/H Fish Feed Factory in Russia

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  8T/H Fish Feed Factory in Bangladesh

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  10T/H Aquatic Feed Mill in the Philippines

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  2*10T/H Fish Feed & 5T/H Shrimp Feed Mill in India

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  6T/H Fish Feed & 5 T/H Shrimp Feed Plant in Indonesia

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  10T/H Fish Shrimp Aqua Feed Mill in Brazil

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  5-6T/H Floating Fish Aqua Feed Plant in Iran

Studies have shown that among the many factors that affect the ecosystem and the disease resistance of fishes, the nutrition and quality of feed is one of the key factors. Comprehensive nutrition and high quality, and the use and popularization of compound feed are key signs of technological progress in aquaculture.

As an industry with broad development prospects, how to seize the opportunity? The answer is the leading aquatic feed processing technology and aqua feed equipment.

RICHI is one of the very few companies with the ability to design, manufacture and supply each and every key sinking fish feed making machine in the sinking fish feed plant, as well as designing and building the fish feed production plant as a whole.

Wherever your fish feed plant is located and whether you produce feed pellets for sinking fish, floating fish, shrimp, trout, tropical fish, catfish, tilapia, carp, saltwater fish, prawn, etc., we offer a full range of fish feed processing machines and equipment – from raw material intake to finished feed storage.

What are the characteristics of processing sinking fish feed using the pelleting process?

First, the different raw materials are pulverized by a fish feed pulverizer, and then the sinking fish feed raw materials are mixed through a fish feed mixer. The mixed fish feed production raw materials are the semi-finished products of the compound sinking fish food.

The next step is the process of making sinking fish food pellets. The pre-mixed compound feed enters the conditioner of the sinking fish feed pellet machine, and then passes through the ring die and pressure roller of the sinking fish feed pellet machine to compress the sinking fish food pellets.

The diameter of the sinking fish feed pellet machine ring die is the diameter of the sinking fish food. When making sinking fish food pellets of different sizes, the sinking fish feed pellet machine ring die of different diameters is used, and the fish sinking pellets extruded are the finished product.
 

There are two important points: First, the performance of the fish feed grinder will determine the fineness of the raw materials. Second, the temperature at which the crushed powder feed enters the conditioner is about 80-90 degrees.

This temperature can make the powder semi-cooked, and finally the refined powder is pelletized into sinking fish food pellets through the sinking fish feed machine ring die and pressure roller. Therefore, the sinking fish food pellets is semi-cooked feed.

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What are the characteristics of processing sinking fish feed using the extrusion process?

The manufacturing process of sinking fish feed extruder machine is roughly the same as that of pellets, but the extruded sinking fish food has two more processes than sinking feed pellet machine technology.

• First, it will be pulverized a second time before making sinking fish food pellets, that is, ultra-fine pulverization, and the fineness of the raw material powder is finer than that of the sinking fish feed pellets machine production.
• The second is the sinking fish feed extruder machine. The feed material temperature in the extrusion cavity is as high as 110-200 degrees, under high pressure, in the environment, continuous mixing, tempering, heating, pressurization, maturation, extrusion, and extrusion of the film hole, suddenly reduce the pressure to form a bulky and porous pellet feed.

In addition, the water content of extruded feed is much lower than that of pellet feed. Because water is lost during the high temperature and high pressure process, 1.1 tons of powdered raw materials are made into pellets and only about 1 ton of finished extruded feed.

• Water entering properties
  In order to ensure that the pellet feed does not melt for a long time, it is necessary to add a large amount of binders such as high-gluten flour or other animal-absorbable binders to achieve the effect of long-term water retention. The sinking fish feed extruder machine is not used, because it is purely matured, it can become a puffed state after a few hours of water, just like a sponge.
• Dust
  Pellet feed dust is obviously excess extruded feed.
• Technology manufacturing cost
  The manufacturing cost of extruded feed is 1-1.5 times the manufacturing cost of pellet feed made by sinking fish pellet feed machine.
• Absorption problem
  Extruded feed made by sinking fish feed extruder machine has gone through high temperature and pressure to eliminate a lot of bacteria, taste good, and absorb better than similar raw material pellets.
• Market price
  Because the price of sinking fish feed extruder machine and sinking fish feed factory extruding process cost is much higher, the price of extruded feed is generally higher than that of pellet feed made by sinking fish feed pellet production line, and extruded is generally used to make high-end fish feed.

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