The granulation mechanism has fast particle size and good effect. The special filter screen is designed and carefully sieved. The friction filter rod can crush the sieved solid particles and is widely used in the pharmaceutical, chemical and food industries. This machine can replace the swinging pellet machine and is a new generation of pellet equipment. In the production of granulating machine pellets, there are sometimes particulate materials with abnormal appearance. For less experienced or new feed manufacturers, sometimes the problem is not found. In the following, the reasons and improvement methods of the seven common abnormally-produced granular materials are introduced to everyone for comparison and reference in feed production. 3PY China Feed Industry Information Network - based on feed, serving animal husbandry
1. The pellets are bent and show many cracks on one side. 3PY China Feed Industry Information Network - Based on feed, serving animal husbandry
This phenomenon is usually produced when the pellets leave the ring mold. In production, when the position of the cutter is adjusted far from the surface of the ring mold and the edge is blunt, the particles are broken or torn by the cutter instead of being cut when being extruded from the die hole. There are many cracks on one side and the other side. Such pellets tend to break from these cracks as they enter the cooler for cooling or transportation, resulting in excess pellets produced. 3PY China Feed Industry Information Network - based on feed, serving animal husbandry
Improvement method: 3PY China Feed Industry Information Network - based on feed, serving animal husbandry
a) increase the compression force of the ring mold on the feed, that is, increase the compression ratio of the ring mold, thereby increasing the density and hardness value of the pellets; 3PY China Feed Industry Information Network - based on feed, serving animal husbandry
b) The feed ingredients are pulverized more finely. If molasses or fat is added, the uniformity of molasses or fat should be improved and the amount added should be controlled to increase the compactness of the pellets and prevent the feed from becoming soft. 3PY China Feed Industry Information Net - based on feed, serving livestock
c) adjust the distance of the cutter from the surface of the ring mold. Usually, the distance from the outer edge of the cutter to the outer surface of the ring mold is not greater than the diameter of the feed pellets produced, or the sharper cutting blade can be replaced. For small diameter pellets, it can also be used. Thin blade and make the thin blade close to the surface of the ring mold; 3PY China Feed Industry Information Network - based on feed, serving animal husbandry
d) The use of a bonding granulation aid helps to improve the bonding force inside the particles. 3PY China Feed Industry Information Network - based on feed, serving animal husbandry
2, horizontal cracks across the entire pellets 3PY China Feed Industry Information Network - based on feed, serving livestock
Similar to the phenomenon in Case 1, the crack occurs in the cross section of the particle, except that the particle is not bent. This can happen when granulating fluffy feeds containing more fiber. Such pellets tend to be granules in the cross-section of the cross-section due to the expansion of the fibers when the pellets are extruded into the granulation pores of the ring mold. Produces a bark-like appearance of the feed. 3PY China Feed Industry Information Network - based on feed, serving animal husbandry
The improvement method lies in 3PY China Feed Industry Information Network - based on feed, serving animal husbandry
Increase the compression force of the ring mold on the feed, that is, increase the compression ratio of the ring mold; 3PY China Feed Industry Information Network - based on feed, serving animal husbandry
Control the fineness of the fiber, its maximum length can not exceed one-third of the particle size; 3PY China Feed Industry Information Network - based on feed, serving animal husbandry
Reduce production to reduce the speed of feed through the die hole, increase the density; 3PY China Feed Industry Information Network - based on feed, service animal husbandry
Lengthening and quenching time, using multi-layer conditioner or kettle conditioner; 3PY China Feed Industry Information Network - based on feed, serving animal husbandry
When the water content of the powder is too high or contains urea, it is also possible to produce the appearance of the bark-like feed, and the added water and urea content should be controlled. 3PY China Feed Industry Information Network - based on feed, serving animal husbandry
3, the particulate material produces vertical cracks 3PY China feed industry information network - based on feed, service animal husbandry
In some feed formulations, there is a fluffy and slightly elastic raw material which will swell and swell when it is tempered by a tempering machine. After being compressed by granules, it will be affected by moisture and the raw materials itself. Elastically bounces off and creates vertical cracks. 3PY China Feed Industry Information Network - based on feed, serving animal husbandry
The improvement method is: 3PY China Feed Industry Information Network - based on feed, serving animal husbandry
Change the formula, but this may increase the cost of raw materials; control the quality of the steam used in quenching and tempering, try to use more saturated dry steam to minimize the added water; reduce the yield or increase the effective cavity The length, as much as possible, allows the feed to stay in the die hole for an increased time; the addition of a binder also helps to reduce the occurrence of vertical cracks. 3PY China Feed Industry Information Network - based on feed, serving animal husbandry
4, the pellet material produces a radiant crack from a source point 3PY China Feed Industry Information Network - based on feed, serving animal husbandry
This appearance indicates that the particulate material contains large particulate raw materials. When these large particulate raw materials are quenched and tempered, it is difficult to sufficiently absorb the water and heat in the water vapor, unlike other finer raw materials, it is easy to soften, while cooling. At the time, the difference in the degree of softening causes a difference in the amount of shrinkage, so that a radiant crack is generated, so that the pulverization rate is increased. 3PY China Feed Industry Information Network - based on feed, serving animal husbandry
The improvement method lies in 3PY China Feed Industry Information Network - based on feed, serving animal husbandry
Properly control the thickness and uniformity of the powdered feed ingredients, so that all the raw materials can be fully and evenly softened during quenching and tempering. 3PY China Feed Industry Information Network - based on feed, serving animal husbandry
5, the surface of the pellets is uneven 5PY China Feed Industry Information Network - based on feed, serving animal husbandry
In this case, the powder used for granulation contains large granules which are not pulverized or semi-crushed. Since the granules are not sufficiently softened during the tempering process, the granules are relatively hard and relatively large, and the granules pass through the granulator. When the pores are not well combined with other raw materials, the particles appear uneven. Another situation may be that the quenched and tempered raw material is mixed with steam bubbles, and the steam bubbles cause the air bubbles to be generated during the pressing of the feed into the granules. When the granules are extruded into the ring mold, the bubbles rupture due to pressure changes. And unevenness occurs on the surface of the particles. This can happen with any fiber-containing feed. 3PY China Feed Industry Information Network - based on feed, serving animal husbandry
The improvement method lies in 3PY China Feed Industry Information Network - based on feed, serving animal husbandry
Properly control the thickness of the powdered feed, so that all raw materials can be fully softened during quenching and tempering; for raw materials containing more fiber, do not add too much steam to this formula because it is easy to contain steam bubbles. 3PY China Feed Industry Information Network - based on feed, serving animal husbandry
6, whisker-like pellets 3PY China feed industry information network - based on feed, service animal husbandry
When the pellets are produced, if too much steam is added, too much steam will accumulate in the fibers or powders, and when the pellets are extruded into the ring mold, the particles will burst due to the sharp changes in pressure and the fibers or particles will be broken. The raw material protrudes from the surface to form the whiskers, especially in the production of high starch, high fiber content feed, the more steam is used, the more serious the situation. 3PY China Feed Industry Information Network - based on feed, serving animal husbandry
The improvement method lies in 3PY China Feed Industry Information Network - based on feed, serving animal husbandry
Good conditioning. When we granulate high-starch, high-fiber feed, low-pressure steam (0.1-0.2Mpa) should be used to allow the moisture and heat in the steam to be fully released into the feed. If the steam pressure is too high, or the downstream pipeline after the pressure reducing valve is too short from the conditioner, generally greater than 4.5m, the steam will not release the water and heat well, so there is part of the steam accumulation. In the tempered feed ingredients, when the granulation is carried out, the whisker-like particle effect described above is caused. In particular, special attention should be paid to the pressure regulation of the steam and the installation position of the pressure reducing valve. 3PY China Feed Industry Information Network - based on feed, serving animal husbandry
7, individual particles or individual particles are inconsistent in color, commonly known as "flower material"
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