Classifier mill

Fig. 13. (a) Mikro ait classifier mill and (b) cutaway of Alpiae ZPS unit. 

Within this grouping of mills are several different designs including the pancake jet mill (horizontal milling chamber), the loop Jet mill (also known as oval milts), spiral jet mill, oppo.sed-jet mills (opposed jet streams), and classifier mills (Fig. 23). 

Classifier Mill A kind of mechanical impact mill or jet mill for size reduction (comminution) that also incorporates a particle classifier. 

Fig. 19.13. Classifier mill system for grinding defatted soy flakes (Source Kanzamar et al., 1993).

Classifier mills both crush material and incorporate a particle classifier. 

Stein at Hosokawa Alpine AG has developed, in the range of their wet classifier mills ( Hydroplex Wet Processing Systems ), the Hydroplex Wet Classifier. This centrifuge can produce sharp cuts from 2 to 20 microns with solids concentrations up to 30% w/w. 

Although it is technically interesting to classify mills according to the stressing mechanisms it is the size of the feed and the product size distribution required which in most cases determine the choice of a suitable mill. Generally the terminology shown in Table 12.1 is used. 

Toneva P, Wirth K-E, Peukert W Grinding in an air classifier mill—part II characterisation of the two-phase flow, Powder Technol 211 28—37, 2011a. 

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