First, the formula is an important factor to ensure the quality of the pellet: 1. Moisture: 11%-13% of raw materials, 15%-17% after quenching and tempering, generally 1% corresponds to 11°C; 2. Starch: The surface of raw starch is rough, the granulation resistance is large, and the bonding performance is poor; the gelatinized starch has good bonding performance and good particle quality. 3. Barley and wheat starch are better than corn starch. If the grain is ripened before quenching (such as drying corn), the granulation yield will decrease. Therefore, when purchasing raw materials, it is better not to choose drying; 4. Protein: When the protein content in the formula is high, it is easier to granulate, and the quality of the granules is better, because the plasticity and viscosity increase after the protein is heated, so that the granulation yield is improved and the quality is good; when the protein content is too high, granulation The effect is reduced, because the ability to absorb steam is seriously reduced, and the quenching and tempering temperature is low. In addition, when non-protein nitrogen (such as urea) is high, the granulation yield is reduced; 5, fat: the right amount of fat, friction resistance is small, ring mold wear is small, low energy consumption, good particle quality, generally controlled within 3% before granulation; fat content is too high, particle quality is reduced, particles are soft, brittle . When adding high-dose grease, it is advisable to add 30% of the total amount to the mixer and 70% of the full amount after the granulator. 6. Crude fiber: The appropriate crude fiber content (3% to 5%) is beneficial to the bonding of the pellets, reducing the powdering rate of the pellets and increasing the pelletizing yield. However, when the crude fiber content exceeds 10%, the bonding strength between the feed particles is lowered due to the poor adhesion of the fibers themselves, and the ability of the feed to absorb steam is also affected, so that the hardness, forming rate and yield of the feed particles are lowered, and the equipment is worn. Severely increased. 7. Minerals: Inorganic feed has almost no cohesive force and poor granulation performance, which affects granulation yield. When the inorganic content is high, a small amount of a binder (such as molasses) is generally added to the material to improve the granulation performance and increase the yield. 8. Binder: A suitable binder can greatly improve the appearance quality, hardness, chalking rate, water resistance of the granules, and improve the nutritional formula of the feed. For example, adding 2~5% bentonite to the feed can provide a variety of macro and trace elements for livestock and poultry, change digestive function, and improve feed nutrient utilization. There are many kinds of binders, such as synthetic urea-formaldehyde resin, lignosulfonate, etc.; plant starches such as cassava, wheat, etc.; rare earth, clay type such as bentonite, attapulgite, etc. It should be reasonably selected according to the actual situation. Second, the crushing particle size 1. The pulverization process is an important factor in controlling the quality of the granules; 2, fine particle size, large surface area, uniform moisture absorption of steam, high degree of starch gelatinization, good quality of pellets produced, 3, ring mold, pressure roller wear little; 4, the smashed coarse powder contains large particles, the produced particles are easy to rupture, the powder is more, the quality is poor; 5. The pulverization is too fine, the friction coefficient of the material is reduced, affecting the output, and the power consumption is increased. Third, the effect of quenching and tempering 1. Quenching and tempering is a processing process for hydrothermal treatment of materials. Domestic and foreign studies have shown that its role in the overall quality of pelleted feed is about 20%; 2, good quality can greatly improve production, reduce energy consumption, improve particle quality; 3, quenching and tempering temperature: livestock and poultry material, 70 ~ 85 ° C; aquatic material, 85 ~ 95 ° C, heat sensitive (sucrose, glucose, skim milk powder, whey powder, etc.) 35 ~ 50 ° C; 4, tempering moisture: the usual mixed feed, especially low protein feed, the grain content is more than 50%, the water content after conditioning can reach 15~17%; for high fiber feed or high natural protein feed, the water content is limited 13~14%. Fourth, the steam system 1. The steam supplied to the quenching and tempering equipment must be high-quality steam without condensate to prevent blockage of the ring mold; 2, steam to be adjusted by low pressure to enter the quenching and tempering equipment with appropriate pressure; 3, the amount of steam should be easy to control, to match the productivity. 4. Selection of operating pressure. Hot Dipped Galvanized Wire,Galvanized Wire,Hot Dip Galvanized Steel Wire,Hot Dip Galvanized Wire ANPING HONGYU WIREMESH CO.,LTD , https://www.hongyufence.com