Cryogenic ultra-fine grinding for heat sensitive products
A new contra-rotating pin mill system for heat sensitive pharmaceutical products gives the option of cryogenic ultra-fine grinding, which prevents product deposits and ensures trouble-free continuous grinding.
A new contra-rotating pin mill system for heat sensitive pharmaceutical products gives the option of cryogenic ultra-fine grinding, which prevents product deposits and ensures trouble-free continuous grinding.
The Alpine Contraplex 160°C milling system from Hosokawa Micron can be operated with air and without liquid nitrogen, and will work to a temperature range as low as -80°C at the mill exit.
Liquid nitrogen mill operation causes the feed material to become brittle. With the new system the precrushing energy is reduced, allowing the mill to achieve high levels of grinding performance. The inert gas atmosphere also offers a higher degree of safety when grinding flammable and potentially explosive products.
The cryogenic mode prevents grinding losses and thermal damage to the feed material. Dependent on the product, it can achieve a throughput capacity of between five and 150kg/h, with a fineness range of 20-80µm.