Broyeur vibrant TS et HEM

Le broyeur vibrant à meules est utilisé pour broyer rapidement, sans poussière et sans perte, des minéraux, matières organiques et céramiques, des épices, différents alliages métalliques cassants etc., jusqu’à  une finesse permettant de les analyser. Suivant la taille de récipient choisie et le type de matière, il faudrait que sa granulométrie ne sorte pas de la plage 5 – 15 mm. Selon le produit, la finesse finale peut atteindre une valeur < 40 microns pendant une mouture à sec et < 1 micron pendant une mouture de matière humide.

Selon la taille du récipient, il est possible de traiter des quantités d’échantillons atteignant 250 cm3.
Pendant les vibrations principalement horizontales, la matière de l’échantillon est broyée par percussion et friction, habituellement en une minute environ, et est simultanément homogénéisée.

Le broyeur vibrant à meules est fabriqué en deux versions différentes, les modèles T et TS. La version TS est une machine prête à  brancher à  installer en laboratoire; elle comprend une commande électrique en façade et une isolation acoustique dans le carter en’acier.

The vibrating-disc mill can be set up with the following options for your requirement:

• Pneumatic clamping of the milling vessels (TS version only)
• As a continuously operating machine with special milling set (T version only)
• Add-on equipment to hold 4 or 6 milling vessels per 10 cm³
• With reversible-pole motor for two drive speeds to enable milling with both steel milling vessels and agate milling vessels that for strength reasons must be run at a slow speed only

Milling tools are milling rings and a millstone that are inserted into the milling vessel so as to move freely. The milling vessel is made to move eccentrically and horizontally in a 100-mm diameter circle by a centrifugal drive, so causing forces to act on the ground material that are equal to 50 times gravitational acceleration. The very high acceleration forces acting on the grinding tools cause them to rotate one about the other like planets. This sets up enormous impact, friction and shear effects between the milling vessel walls, and these cause the sample material to be very quickly ground down to the required analysis fineness.

Because of the large capacity of the grinding bowl large sample volumes can be broken down and at the same time homogenised in the mill. At the end of the grinding time the sample is emptied fully-automatically out of the grinding bowl into a receptacle. The receptacle can be easily detached from the front of the mill. To prevent cross-contamination from one grinding operation to the next, the grinding bowl is cleaned with compressed air before the next charge grinding.

The machine is controlled from a touch panel by means of which parameters such as grinding time and emptying and cleaning times can be set and adjusted to suit the material to be ground.