Dyno-Mill

Fig. 17.2. Sketch of the Dyno Mill KDLT. 1. Cell suspension inlet 2. agitator disks 3. coolant 4. disruptate oudet 5. gap separator 6. motor 7. Coolant.

Preparation of Suspensions A standard 400 g leg aqueous pesticide suspension was prepared by a wet milling process using a Dyno mill (ex. Willy. A. Bachofen, Basle, Switzerland). 40g... 

Figure 5 Dyno-Mill horlsontal small media mill...

Comminution (grinding) of the dispersed particles into smaller units (usually in the region of 1-10 pm). Wet grinding is achieved by the use of mills (Dyno mill) or using a Microfluidiser. 

Fig. 1. Photograph of a ass body Dyno mill during a coloured tracer experiment showing the existence of perfectly mixed regions (a) corresponding Heitzmann s flow model (b).

Fig. 2, Influence of the recirculation ratio on the RTD (example of simulation for a Dyno mill).

It can be concluded that such a mill, driven under typical operating conditions, is well designed for batch operation but not for continuous nding of suspensions. With respect to the Dyno mill, an increase of the number of the stirring blades is only efficient if the stiirer speed of rotation can be significantly reduced. This should be taken into account when scaling up of stirred mills. 

However, for the case of some mills, such as the Netzsch mill, the great number of blades is only efficient in continuous milling if the flow conditions are gentler than, say, in a Dyno mill. .. but in this case, the general flow can be affected by the presence of the particles, and the Residence Time Distribution be influenced by particle properties, such as particle size. From this would result an additional non-linear problem, as the markovian transitions become state dependent. 

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