How to control moisture content in pig feed pellet

The influence of the moisture of pig feed pellets on mechanical wear and production efficiency

The lower moisture of the pellets, the more severe the mechanical wear and the lower the production efficiency. The production efficiency of pellets with moisture content of 11%~13% is fast, and with light mechanical wear.

Moisture control in pig feed production

1 Moisture control during raw material crushing

By comparing and analyzing the results of using animal feed crusher screens with different apertures, it is found that the moisture loss of raw materials after pulverization increases significantly with the reduction of the raw material pulverized particle size. As the moisture content of the raw material increases, the crushing efficiency will decrease and the energy consumption will increase.

2 Moisture control during feed mixing

The water loss during the feed mixing process is very small and can be ignored. When the moisture content of the mixed powder is low, we can spray water when the materials are mixed. However, there are many problems in adding water to the mixer that must be paid attention to: 2.1 The water added to the mixer cannot be directly used as tap water, it needs special treatment or the addition of an anti-mold agent.

2.2 Match suitable quantity and size of nozzles, adjust the position and speed of the nozzles to ensure uniform spraying.

2.3 Clean up the feed mixer machine and the granulating silo after the end of production every day to avoid residual materials on the inner wall of the mixer and the granulating silo.

3 Moisture control in the conditioning

Steam conditioning is a key process in pellet feed processing. The conditioning affects the quality of pellets and the moisture content of the finished feed directly. Steam quality and conditioning time are two important factors that affect the conditioning effect. In the production process, you can adjust or close the trap on the feed pellet machine and use low-pressure steam to increase the conditioning time of the material in the conditioner, so that the material and the steam are fully mixed, so that the material can fully absorb the moisture in the steam, thereby increasing the moisture of the product.

4 Choose a suitable pelletizing ring die

The aperture and compression ratio of the ring die pellet mill are the main factors affecting the pellet mill`s productivity, as well as one of the factors affecting the moisture of the pellet feed product. A ring die with a small aperture, because of its small particle diameter, the air volume of the cooler is easy to penetrate the feed pellets, so the water taken away during cooling will be too much, and the feed product moisture will be low. Conversely, the material ring die with a large aperture has a larger particle diameter, and the cold air is not easy to penetrate the particles, so less water is taken away during cooling, and the water content of the feed product will increase. For the ring die with large compression, the friction resistance is large during the granulation process, and the material cannot pass easily. During extrusion granulation, the friction temperature is high, the water loss is large, and the moisture content of the feed pellets will be reduced.