1, feed formula: puffed floating fish feed feed formula should be designed according to the nutritional needs of each fish species combined with the characteristics of puffing, should ensure that the ratio of raw materials have more than 20% of starchy raw materials, additives should be selected to withstand high temperatures, especially vitamins should be selected to withstand high varieties or increase the dosage.
2, production process: puffed floating feed production process is: ingredients → micro crushing → mixing → mixing with water → puffing granulation → cooling, drying → packaging. Crushing size of raw materials should be below 0.5mm, which is conducive to puffing pellets, but also to improve the utilization of nutrients in raw materials; water mixing is a key step, should control the moisture content of raw materials between 23%-30%, moisture is too low, difficult to puff, easy to block, moisture is too high, may not be puffed sufficiently, affecting the molding; puffing pellets are generally used hundred pulse sea source wet extrusion puffing machine. Raw materials in the puffing machine spiral extrusion and push, resulting in high temperature and pressure, the moment through the die hole, the temperature and pressure drop sharply, so that the water in the raw materials evaporate quickly, volume expansion, specific gravity becomes lighter, after the cut of the material mouth cutting molding, and then cooled and dried to room temperature and moisture below 12% packaging.
3, the factors affecting the puffing: the ratio of raw materials, starch content and moisture content of raw materials, puffing temperature and pressure, the speed of the puffing machine affects the quality of puffing, especially the starch content and moisture content of raw materials and puffing temperature has a greater impact. These factors should be adjusted in order to produce a better quality puffed floating feed.
Contact Person: Fiona
Tel: 86 19913726068