Operating principle

The fast comminution capability of the PULVERISETTE 14 premium line is due to the extremely high speed of the rotor, which is made of stainless, tempered steel. With a rotational speed of up to 111 m sec-1, the impact energy lies in the range of pin mills, known for their high grinding capacity. Additionally, the sharp-edged teeth of the rotor work in combination with the installed sieve to grind the sample by shearing - similar to high speed cutting mills. After passing through the sieve, the ground sample is collected in a stainless collecting vessel. The source material is fed through a funnel into the grinding chamber and accelerated outwards radially by the high speed of the rotor. There, the material is caught by the impact rotor, ground, and then discharged through the sieve ring into the collecting vessel at a defined particle feed size. To ensure continuous flow of the sample, the vibratory feeder LABORETTE 24 is connected to the PULVERISETTE 14 premium line and the free end of the channel is placed over the input funnel of the PULVERISETTE

14 premium line. Depending on the model, the feed rate can be regulated by the mill to always feed the right amount of sample for optimal comminution. If the amount of source material is too large, the feeder is automatically decelerated.

Speed control

By tapping the number field in the "Speed" menu item, the rotational speed can be preset to between 6000 - 22000 rpm in increments of 1000, and in this way be optimally adapted to the requirements of the grinding of the samples. The speed is readjusted for each load.