Feeding adaptation techniques for conventional raw materials. Conventional raw materials such as corn, soybean meal, and fishmeal, after pretreatment, have a moisture content of 12%-13%, a particle size of 80-100 mesh, good flowability, and strong compatibility for feeding. For manual feeding, a "uniform and continuous feeding" method can be used, with a moderate single feeding amount, requiring no additional assistance. Automatic feeding systems can set the feeding speed according to the extruder's rated capacity without significant adjustments. Regarding parameter adjustments, when processing corn-based raw materials, the feeding speed can be close to the rated upper limit of the floating fish feed making machine, combined with a screw speed of 300-320 r/min, to ensure sufficient starch gelatinization. When processing soybean meal-based raw materials, the feeding speed should be appropriately reduced by 5%-10% to avoid excessive protein denaturation, while simultaneously increasing the extrusion temperature to 140-150℃. When processing raw materials with a fishmeal content ≥30%, the feeding speed should be stabilized at 80%-90% of the rated capacity, maintaining uniform feeding and avoiding localized raw material accumulation that could cause fluctuations in extrusion degree. When loading, it is important to note that fishmeal is prone to absorbing moisture and clumping. Therefore, a stirring device should be installed in the hopper to prevent clumping and blockage of the feed inlet.
Loading techniques for high-fiber raw materials: High-fiber raw materials such as brewer's grains, corn germ meal, and wheat bran have a fiber content of 15%-25%, poor flowability, and are prone to bridging. Targeted adjustments are needed during loading: During pretreatment in a small fish feed pellet making machine, in addition to meeting moisture and particle size requirements, 0.5% food-grade binder can be added to improve the flowability of the raw materials; at the same time, the raw materials should be crushed to 90-100 mesh to reduce blockage caused by fiber entanglement. Regarding loading methods, manual loading should use a "small amount, multiple times + auxiliary feeding" approach, using a wooden feeding rod to continuously clear the feed inlet and avoid bridging; automatic loading systems should use a large-pitch screw conveyor, and a vibration device should be installed at the bottom of the hopper to prevent raw material accumulation. The feeding speed should be reduced by 15%-20% to allow the screw sufficient time for shearing and crushing. Regarding parameter adjustments, reduce the screw speed to 250-280 r/min and increase the steam addition to avoid excessive pressure in the extrusion chamber, which could overload the equipment. During the loading process, continuously monitor the discharge status; if signs of jamming appear, immediately stop feeding, clean the extrusion chamber, and then restart.
Feeding adaptation techniques for high-moisture and heat-sensitive raw materials. High-moisture raw materials (14%-15% moisture, such as fresh distiller's grains) are prone to sticking. During loading, moisture content must be controlled and the feeding pace accelerated. During pretreatment, fish feed production equipment should be properly dried to reduce the moisture content to around 13%, and a thin layer of lubricating oil should be applied to the feed hopper to prevent sticking. Increase the loading speed by 10% to prevent the raw material from staying in the feed pipe for too long and sticking, while simultaneously reducing the extrusion temperature by 5-10℃ to prevent excessive gelatinization of the raw material. Heat-sensitive raw materials (such as vitamin premixes and enzyme preparations) are easily damaged by high temperatures. Therefore, a "post-addition" method must be adopted during loading. Conventional raw materials are first processed by an extruder, while heat-sensitive raw materials are added through the secondary feed inlet of the automatic loading system. The feeding speed is matched to the extruder's discharge rhythm to avoid prolonged high-temperature contact time. Simultaneously, the extrusion temperature is controlled to not exceed 130℃ to ensure the activity of the heat-sensitive components. Furthermore, the feeding system must be cleaned promptly after loading to prevent high-moisture and heat-sensitive raw material residues from deteriorating and corroding the equipment.
About Us
Customer visit
Certificate of Honor
Your message must be between 20-3,000 characters!
English
