Oil Palm empty Fruit Bunch Fiber

Feeding of sample can be automated with Vibratory Feeder LABORETTE 24. After 5 minutes, all sample has been fed and ground to d50 < 40µm as desired. The standard collecting pan use to be filled to the maximum.

For a grinding of higher amounts, we recommend using the accessories for grinding large quantities.

After 5 minutes of dry grinding, particles up to 2mm length can be found. By further grinding, we found a maximum particle length of 400µm after 10 minutes. After totally 15 minutes of grinding, sample started sticking strongly to bowl and balls.

Usually sample starts sticking to bowl and balls, when majority of particles reached a fineness of < 20-30µm. Interacting forces between fine ground particles will become bigger as their own g-force. Therefore, particles will stick to each other and just become compressed by the used grinding balls. These clusters of particles also contain bigger particles which will not be ground any further too.

For this, a longer dry grinding time as 10 minutes is not recommended. Only by grinding in suspension (e.g. in alcohol), a better endfineness can be achieved.