Pelleting is a well-known process in the compound feed industry. The transformation of feed mash into pellets has many benefits regarding logistic handling and nutritional properties of the end product.
Because the compounded feed is formed into pellets after mixing of the feed mash, each pellet contains the nutrients as specified by the nutritionist. This prevents selective eating of the animals, ensuring each animal will consume a balanced diet.
The pelleting of the feed also improves the logistic properties of the compounded feed. The pellets have a higher density then feed mash, enabling more feed to be transported in the same shipment. Furthermore, the dust formation in the product handling is significantly reduced, resulting in reduced (cross) contamination through the entire logistic process.
Transformation of feed mash into pellets
The transformation of the feed mash into hard pellets is accomplished by compression in the pelletmill die. The pelleting process consists of even spread out of the feed mash (meal) over the inner diameter of a ring-shaped die. Consequently, the formed layer is compacted and pushed through the holes in the ring-shaped die, by a set of rollers.
Generally recognized advantages of pellets
Optimized pelleting process
The key of an efficient pelleting process is to determine the optimal compromise between energy consumption and pellet quality, while producing the desired capacity.
Many factors are of influence on the pelleting process, from the recipe, to conditioning parameters, and pellet mill die specifications. Therefore, the entire processes of conditioning and pelleting are tuned to meet demands both on quality and energy consumption.
With an active roller slip control the operator is offered the opportunity to experiment with the roller distance and steam addition for the recipes to boost the feed quality and production efficiency. Operators can rely on this system while exploring the settings for the most optimum production.
One of the key components of the pellet mill is the die. Correct die selection will have a great influence on quality, energy consumption and pellet mill capacity. There is a huge variety in dies available, ranging from thin dies with parallel holes to thick dies with counter drilled or conical holes.
All demands are evaluated when selecting a die for a certain application, to ensure a smooth running pelleting process with the desired pellet quality and minimum energy consumption.