To avoid separation of feed components during mixing, the fish feed extrusion process has been used to improve pasteability and digestibility of feeds, making it easier for fish to obtain well-mixed nutrients. As the name implies, fish feed pelletizing is the process of compressing, granulating and forming feed ingredients into pellets under the action of heat, moisture and pressure. Pellet puffing feed produced by floating fish pellet mill and puffing machine is highly digestible, nutritious and floating, and has become the mainstream feed for most fish.
fish feed extrusion process
Pelletizing is the process of passing a mixture of fish feed ingredients through heat, moisture and pressure in a floating fish feed pelletizer – the ingredients are pressed into shape through a die. Based on extensive experience, too little or too much steam and heat added to the ingredients can result in poor pellet quality, while insufficient temperature and uneven mixing fail to kill dangerous pathogenic microorganisms present in the pelleted feed. The road to perfect fish feed pellets requires top-notch processing technology and advanced floating fish feed pellet mills and fish feed extruder.
In cooperation with the feed industry, we are constantly researching pelleting process technology and machines to improve the feed conversion and nutrition of fish feed. Let’s talk about the detailed process of making fish feed pellets. Fish feed extrusion process, including dry fish feed extrusion process and wet fish feed extrusion process, is an aquatic fish feed extrusion process in which raw materials are pushed forward in a barrel by a screw and pressed through a die at the bottom of the barrel. The general fish feed extrusion process involves high temperatures for a short period of time.
Temperatures above 100°C are required to allow the feed material to expand as it leaves the die. High temperatures in dry extrusion are obtained by mechanical energy dissipation on heated surfaces, such as the barrel and screw surfaces, or by shear forces between the wall and the material and the screw and the material.
1.Grinding:
In order to speed up the mixing process and improve the nutritional utilization, people need to crush the raw fish feed into fine particles, which requires a crusher – water drop fish feed crusher. At the same time, the size of the material has a great impact on the size and quality of the feed in the next step of the pelleting process. Generally speaking, most freshwater adults are ground to about 40 mesh (420um), while juveniles are ground to about 60 mesh (250um).
2.Mixing:
The daily feeding quantity of fish is small and the feed ingredients should be well mixed after crushing and processing to ensure that the fish get complete nutrition from the daily feed. The degree of mixing of the mixer is very important in the feed production and processing because it will affect the quality of fish feed, so it is quite important to choose a suitable mixer. Here, we recommend well-designed fish feed mixer FY-500 for homogeneous mixing of powdered or granular materials with good fluidity.
3.Pelleting:
To produce floating pellet feeds that meet precise quality indicators in terms of size, durability, density, and nutrient content, farmers must choose the right floating pellet feed machine according to their investment costs, production scale, and the farming characteristics and habits of the farmers. Different aquatic animals. Our floating fish feed pellet mills are capable of producing high quality fish feed pellets for fish as well as for pets such as dogs and cats. In addition, it is not difficult to produce floating fish feed pellets with different diameters (usually from 0.9 mm to 15 mm), simply by changing the size of the floating fish feed pellet mill die, which allows fish farmers to be more flexible depending on the type and growth of their fish.
