Experimental investigation on fluidized bed jet grinding
Fluidized bed jet grinding is a well accepted method for producing powders with an average particle size of less than 10 μm quickly and effectively. Its use has increased steadily for grinding chemicals, minerals, pigments, pharmaceuticals, abrasives, plastics and food. Nevertheless, even though...
| Main Authors: | , |
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| Format: | Article |
| Published: |
1998
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| Online Access: | http://journalarticle.ukm.my/1348/ http://journalarticle.ukm.my/1348/ |
| Summary: | Fluidized bed jet grinding is a well accepted method for producing powders with an
average particle size of less than 10 μm quickly and effectively. Its use has increased
steadily for grinding chemicals, minerals, pigments, pharmaceuticals, abrasives,
plastics and food. Nevertheless, even though the uses are increasing, the basic
mechanism of comminution within such mill is not well understood and their design
and prediction of performance is therefore largely very empirical. Using coarse
cracking catalyst and 2 mm i.d. jet nozzles, the effects of gas mass flowrate,
separation distances and geometry of the set up on the initial grinding rate have been
investigated. It was found that grinding was a consequence both of interparticle
collisions in the jet region, and when a target plate was used, of abrasion on the
single plate. For a given power input, target plate jet grinding gave a higher
production rate and finer size of product than with two opposing nozzles |
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