Cryo-grinding  [ Return towards  Applications  ]

Principle:

Low temperatures allow the hardening and weakening of substances to grind.

Advantages:

Preserve physical and chemical characteristics of heat sensitive products
To grind products of a very different nature with homogeneous particle sizing
To directly obtain finest powders with minimum power and retraining
To optimize the treatment capacity of the installation
Air Liquide supplies turnkey installations and liquid nitrogen pre-cooling materials, adapted to different products to be ground.

Today two techniques are used for freeze-grinding :

The cryogenic screw:

Very efficient for in-line treatment of product whose out-flow is difficult

Fast cooling and  high temperature accuracy

Excellent output

Total recovery of residual refrigerates from the grinder

The hopper to pulverization:

Vertical system designed for in-line treatment of sensitive products to cluster

Simple and compact deseign

Fast cooling and excellent output of refrigeration (recovery of the sensitive heat of cold gases)

Helical wiper which ensures the granules out-flow and temperature homogenization