Feed additive processing technology represents an innovative approach that combines the principles of feed production with pharmaceutical chemical engineering. This advanced method emphasizes efficiency, minimal resource consumption, contamination-free operations, and continuous production to ensure high-quality end products.
1. Process Overview
The process for producing a premixed feed additive is illustrated in the diagram below. The general flow includes several key stages:
Premixed Additive Process
Thinner
↓
Dilution ↠Dissolve ↠Measure ↠Iodine, Cobalt, Selenium, etc.
↓
Carrier and Additive Raw Materials → Drying → Crushing → Sieving → Metering → Mixing → Finished Product
2. Key Process Considerations
2.1. Raw Material Selection
Choosing the right raw materials is crucial for effective feed additives. These materials should meet specific criteria: high bioavailability and biological activity, low heavy metal content, good palatability without any unpleasant odor, resistance to moisture absorption and caking, stability against oxidation, good electrostatic properties, proper particle size, high purity, cost-effectiveness, and safety for both animals and humans.
2.2. Carrier Selection and Processing
Carriers are essential to dilute trace elements and improve their handling. They should have good surface characteristics and water retention ability, allowing micro-additives to adhere effectively. Ideal carriers include fine powders, cake powder, or steamed bone meal. They should have a moisture content below 10% and a mesh size between 30 and 80.
2.3. Selection and Treatment of Diluents
Diluents must be chemically stable and compatible with trace elements, ensuring similar bulk densities to maintain uniform mixing. Calcium carbonate (CaCO3) is commonly used due to its low cost, wide availability, and suitability as a calcium source for animals.
2.4. Handling of Toxic Trace Elements
Elements like selenium, cobalt, and iodine can be toxic if not handled properly. To reduce risk, these are often pre-treated by hydration before being mixed into the thinner. The mixture is then dried and ground to prepare the final ingredients.
2.5. Drying Process
Many raw materials contain excess moisture, which needs to be removed. An electric oven with temperature control is typically used for drying, extending shelf life and improving the efficiency of subsequent grinding steps.
2.6. Crushing and Sieving
All raw materials must be crushed to the desired fineness. Specialized grinders are used for sensitive components, and the resulting powder is sieved to remove coarse particles, which are reprocessed as needed.
2.7. Measuring and Weighing
Accurate measurement is critical. Manual weighing is common, performed by trained personnel using precision scales or electronic meters to ensure accuracy.
2.8. Mixing
A high-speed, sealed mixer is used to blend the ingredients thoroughly. The carrier is added first, followed by the trace elements. Each batch is mixed for 10–15 minutes to ensure even distribution, with less than 0.3% residue remaining in the machine.
2.9. Packaging
After mixing, the product is carefully measured and packaged. The packaging must meet strict quality standards, with a precision of at least 1/500. It should be tightly sealed to prevent leakage, and each package comes with a quality inspection certificate detailing usage instructions, application guidelines, and target animals.
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