Summary

Hosokawa supplies complete systems for the manufacture of insect spray, dust or granules. Hosokawa/Alpine fine impact mill UPZ is used for this task. The particle sizes demanded for insect sprays range are achieved with Hosokawa/Alpine fluidized bed opposed jet mill AFG. These mills set new trends in the production of pesticides.

The end products range between 10 and 40 µm in size and are free from oversized particles. The products are extremely homogeneous and display excellent suspension properties. The problem common when mechanical impact mills are used, i.e. the spalling-off of deposits, is unknown with fluidized bed opposed jet mills. This means that elaborate and expensive safety screening steps are no longer required in modern pesticides production systems configured with fluidized bed opposed jet mills. The AFG is capable of grinding complex pesticides formulations with active substance contents of up to 80%. The temperature rise in the AFG during grinding is negligible, meaning that even products with low melting points can be processed without problem. In special cases, it is even possible to grind pure active substances with the AFG. This type of processing has the big advantage that the carrier substances, which are already of end-product fineness, do not need to be passed through the mill system, but are rather mixed in at the end of the process.

The impact mills that were often employed in the past for grinding pesticides are much less suitable because of the temperature rise during grinding.