What Is a Pellet Mill?

The granulator is mainly composed of feeding, mixing, granulating, transmission and lubrication systems, etc. It is widely used in the pharmaceutical, chemical and food industries. Granulators can be divided into feed granulators and biomass energy granulators.

The granulation mechanism has fast granulation and good effect. It is designed with a special hole filter and carefully sieved. The friction filter rod can shatter and filter strong particles. It is widely used in the pharmaceutical, chemical and food industries. This function can replace the swing type

The granulator is mainly composed of feeding, mixing, granulating, transmission and

1. Avoid picky animals. The compound feed formula has a variety of raw materials and comprehensive nutrition, which can prevent animals from picking their favorite food from the powder and refusing to ingest other ingredients. Because pellet feed can maintain uniformity during storage and transportation, feeding loss can be reduced by 8% -10%.

2. High feed returns. During the granulation process, due to the combined effects of moisture, temperature, and pressure, some physical and chemical reactions occur in the feed, making the starch gelatinized, and the enzyme activity enhanced, which can make the animal being fed digest the feed more effectively and convert it into weight gain. . Feeding poultry and pigs with pellets can increase feed conversion (ie, return) by 10% -12% compared to meals. Feeding fattening pigs with pellets will increase the average daily weight by 4% and reduce the feed-to-meat ratio by 6%. Feeding broilers will reduce the feed-to-meat ratio by 3% -10%.

3. More economical storage and transportation. After granulation, the bulk density of feed is generally increased by 40% -100%, which can reduce storage capacity and save transportation costs.

4. Good liquidity and easy to manage. Many powders, especially velvety feeds with small specific gravity, feeds with added molasses or high fat and urea often adhere to the silo. Due to the good fluidity of the pelleted feed and little sticking, pelleted feed is most popular for large-scale farms that use automatic feeders to feed cows or poultry.

5. Avoid automatic classification of feed ingredients and reduce environmental pollution. In the process of powder storage and transportation, due to the different volume and quality of various powders, classification is easy to occur. After granulation, there is no classification of feed ingredients, and the pellets are not easy to dust. During the feeding process, the pollution of the pellets to air and moisture is much less than that of the powder.

6. Kill Salmonella in animal feed. Salmonella remains in animal tissues after being ingested by animals, and humans who eat animals infected with this bacteria will get salmonella gastrointestinal disease. The method of steam high-temperature quenching and tempering and re-granulation can kill Salmonella in animal feed. ^[1]

1. The granulator is a kind of swinging action using a rotating drum. The wet powder raw materials can be ground into granules through an iron wire sieve. It can also be widely used to crush the granules that have become lumps and become ready-made granules.

2. In the chemical industry, it is used as a wet powder to grind into granules. After drying, it can be compressed into tablets. It can also be crushed during storage and agglomerated or agglomerated during chemical processing. It is used industrially to treat confectionery, sugar mixtures and malt milk, etc. In other industries, such as ceramics, plastics and other materials become shaped particles.

3. It is not suitable for semi-solid, fluid, slurry or abrasion applications. ^[1]

The functions of high speed mixing granulator

The functional requirements of a high-speed mixing granulator are as follows:

1. Stir the paddle to dry mix the materials, add the adhesive to wet mix. According to the characteristics of the material and the adhesive, the rotation speed of the stirring blade can ensure that the movement generates vortex and the materials are fully mixed. At the same time, the area where the knives intersect is sufficient to break up the tumbling material mass into granules.

2. The rotation speed of the mixing paddle and the granulating knife can make the material move in three dimensions, and the particles collide, friction, and shear, so that the friction is uniform and fine, and finally stable spherical particles are formed. The mixing time, the speed of the stirring paddle and the granulation knife, the granulation quality and uniformity after drying can meet the requirements of the solid preparation production process.

3. The mixing and granulation process should be in a closed state, and the entire mixing and granulation process (including feeding, mixing, cutting, granulation, and discharging) should work under the cleanliness of 100,000 or 300,000, and ensure that there is no foreign matter fall.

4. The machine can be matched with boiling drying or lifting feeding or vacuum feeding equipment. ^[2]

Brief introduction of influencing factors of high-speed mixed granulation granulated products

Generally speaking, granules made by wet mixing granulation have irregular shapes, uniform particle size distribution, and a better structure than other traditional granulation processes. However, the granulation of the granulated product involves many factors. Briefly.

1. The influence of the speed of the stirring blade and the cutting blade

It can be said that the size and distribution of the particle size are directly related to the speed of the stirring blade and the cutting blade. When the speed of the cutting blade is slow, the particle size of the particle becomes larger, and the speed of the particle is smaller when the speed of the blade is slow. The particle size is small, and the particle size is large when the speed is increased. The two functions have opposite effects.

2.Effects of mixing, granulation procedures and time

During the operation of the high-speed mixing granulator, the rotation of the stirring blade causes the material in the pot to roll to the space, so that the bottom of the pot rotates and throws up along the wall of the pot. This action successively softly pushes the soft material to the fast cutting knife and is It is cut into particles of different sizes, and gradually becomes spherical as the particles roll over each other for a period of time. It can be seen that the speed and time of the stirring paddle and the cutting blade affect the particle size of the granulation.

3. Influence of material and concentration

In wet mixing granulation production, alcohol granulation or dextrin binder granulation is commonly used, and the two are different by a certain degree of stickiness. Commonly used alcohol granulation, the granules are small and fine, easy to dry, because alcohol does not have viscosity, and it has a loosening effect, this method is ideal for high viscosity traditional Chinese medicine granulation. When granulated with dextrin, the granules produced are large and coarse, and the drying is slow. This is ideal for western medicine without viscosity because of the viscosity and polymerization of dextrin.

In addition, whether it is a material diluted with a thick extract or a material using dextrin or other binders, when producing smaller particles, the slurry concentration of the material can be thinner. When larger particles are required, the material The slurry concentration can be slightly thicker. ^[2]