Wet classifiers

These are used to make two product size ranges, oversize and undersize, with some overlap. The break commonly is between 28 and 200 mesh. A considerable variety of equipment of this nature is available, and some 15 kinds are described by Kelly and Spot-tiswood (1982, pp. 200-201). Two of the most important kinds, the drag rake classifier and the hydrocyclone, will be described here. 

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Characteristics of Size Classifiers (See Sec. 19 Screening on screening equipment and Wet Classification on wet classifiers.) Types of classifiers and commercially available equipment are de-... 

A machine used to separate particles of specified size ranges. Wet classifiers include settling tanks, centrifuges, hydrocyclones, and vibrating screens. Dry classifiers, also termed air classifiers , use gravity or centrifugal settling in gas streams. 

Hinde and Lloyd [27] are more interested in extracting samples for continuous on-line analysis. They state that the process streams from industrial wet classifiers can vary in volume flow rate, solids concentration and particle size distribution. Any sampling technique should be able of coping with these variations without affecting the representativeness of the extracted sample. 

C Sturtevant Mill Co.), (e) Dorr drag rake wet classifier, (f) Hydrocyclone. 

Wet classifiers mostly are used to make two product size ranges, oversize and undersize, with a break commonly in the range between 28 and 200 mesh. A rake classifier operates at about... 

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