How to Improve the Durability of Feed Pellets

Pellet durability is important if the benefits associated with pelleting are to be realized. Feed pellet durability depends upon several factors as following:

1. Particle SizeIn general, smaller mash particle size enhances better pellet quality since the material has a larger surface area that allows heat and moisture from steam to more quickly and throughly penetrate the particle. In addition, smaller particles also have more surface area to adhere and bind to other particles in the pellets.

2. Die MaterialIt is important to choose the right die material. Pellet dies are usually made from alloy, stainless or high chrome. Now I would like to focus on alloy dies. Alloy dies are made of medium-grade carbon steel. They are designed for heavily abrasive applications and typically are the most breakage-resistant dies available. In general, alloy dies are less expensive than stainless steel or high chromium dies. In fact, alloy dies can meet your actual pelleting requirements.

3. Moisture ContentThe moisture content can also affects pellet durability. Moisture in feed comes from two sources: bound moisture and added moisture. The former present in the feed’s ingredients and the latter is from water and steam addition. Varying moisture affects the conditioning process and pellet mill operation. Research has shown that there is a high correction between moisture content and pellet durability.

4. Pellet CoolingProper pellet cooling depends upon adequate airflow and cooler retention time. Poor cooling reduces pellet durability. Poor pellet cooling in vertical and horizontal coolers is attribution to airflow restrictions and caused by plugged cooler screens, trays or air inlets. Typically, if greater retention time is needed, adding additional height to cooler walls or horizontal sections is done to increase the cooler’s surface area.

If you notice the above aspects, that is to say, you are concerning the durability of feed pellets. Any question, please feel free to contact us.

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