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In the animal feed industry, nutritionists make the formulas with the available ingredients, depending on the animal to be fed and its production stage. The formulated ingredients are mixed in different processes. However, there is a separate mixing process for the homogenous blending of the ground ingredients (macro and micro) and the liquids that come directly into the feed mixer.

High-quality pellets start with a homogeneous mixing process

Feed mixing equipment is key to obtaining a homogenous blend of the nutrients in the formulations. But apart from producing balanced nutritional values, mixing plays a significant role in the quality of feed pellets.

The ingredients that go into the feed products must be combined uniformly before they are transferred to extrusion and pelleting. Uneven mixing results in pellets of irregular consistency.

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Macro ingredients go first in the feed mixing equipment

The sequence of processing in the mixer is critical to achieving an optimal mix, and components must be added in the correct order. The standard rule goes from large to small and from dry to liquids.

Start with the macro ingredients, which are ordinarily pre-ground and blended in the milling process. Then mix in the minor and micro-ingredients such as minerals, vitamins, additives, and premixes. After the mix is achieved, liquids like molasses, amino acids, and fats are ready to be incorporated.

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Four parameters to choose the right mixing technology

The quality of the mix must always be uniform and homogenous, meaning that any portion taken from the mixture has to have the same nutritive content as the whole mix. But the quality of the feed mix depends on the type of mixer used.

There are four criteria for selecting a suitable feed mixer: the production capacity, the density of the bulk ingredients, the volume of liquids, and the performance criteria.

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Ensure that horizontal mixers are filled to the correct capacity

Horizontal mixers are typically more suited to industrial feed production. And one of the most important factors to consider is capacity.

Overfilling or underfilling the mixer results in incomplete mixing as the agitators need to move the ingredients thoroughly. Keep an eye out for the paddles or ribbons in the mechanism. The feed mix will stay balanced if the design is adequate for your components.

Avoid extreme volumes in vertical mixers to prevent agglomeration

Vertical mixers are more adapted to small-scale plants or on-farm production. These systems leverage gravity to disperse the ingredients uniformly throughout the mix.

However, insufficient mixing time and an excessive production volume compromise the mix’s quality. In the best case, inadequate mixing forms agglomerates or lumps. In the worst case, it could raise the toxicity levels in the feed pellets.

Maintenance tips to follow for a high-quality mixing operation

Proper maintenance of the mixer and all the equipment in the production line is vital for efficient performance and operation.

Preventive maintenance should be done regularly to lubricate, change oil, repair, or replace the moving parts before they are too worn. In everyday operation, the mixer needs to be monitored to control the mixing time and the sequence of adding the ingredients, to check the quality of the mix, and to detect any malfunction on time, guaranteeing a uniform and homogeneously mixed formula.

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