Powder and Bulk Engineering
Wednesday, August 20, 2014
Skip Navigation LinksHome) Item Details
Powder and Bulk Engineering is a technical publication devoted to readers in the bulk solids market, worldwide.
Technical Articles
Item Details:
Publication Date: 06/1987
Pages: 8
PDF Format
Related Item(s):
Recommended Item:
Fluid energy grinding or jet milling

Using fluid energy for grinding is a unique method of breaking solids into fine particles. Mills powered by fluid energy have no moving parts. Grinding is achieved by pressurized elastic fluids such as air or steam, which cause the particles to collide with force sufficient enough to break them into smaller particles. Fluid energy grinding delivers micron and submicron products with a much narrower particle size distribution than can be obtained with other types of grinding operations. In addition, many other functions -- such as classification, dehydration of wet materials, of fine particles with liquids or solids, blending, drying, and some chemical reactions ? can be performed simultaneously. This article outlines several different types of jet mills and discusses the practical and theoretical aspects of fluid energy grinding.

Jet mills grind continuously, reducing solids to particle sizes in the low-micron to submicron range. The material to be pulverized -- which can range from heat-sensitive soft waxes, ores, and crystals to hard abrasives [Table I] -- is exposed to streams of elastic fluid in the mill. This fluid, usually compressed air, compressed gas, or super-heated steam, is introduced through specially designed nodes that convert the fluid energy into velocity. The solid particles are then swept into the violent turbulence created by these sonic or supersonic velocity streams, and collide with and pulverize one another. The mill grinds and classifies simultaneously by using the principle of centrifugal force.

To read this entire article:

You may purchase this article now for personal use. Simply click the Buy Item button above, enter your payment details, and download the article. It will be available to you for 7 days for viewing, printing, or saving for future reference. All articles are copyrighted by CSC Publishing, Inc. and cannot be used for commercial purposes without express permission in writing from the Publisher. This includes but is not limited to: web posting, printing, or sharing via email.


Your payment information is forwarded in an encrypted form, using 40- or 128-bit Secure Socket Layer technology, only to our payment gateway ( for processing.


To view an article, you must have Acrobat Reader installed on your computer. Click on the icon to download Acrobat Reader free of charge.

      Copyright 2014, CSC Publishing Inc. ALL Rights Reserved * Privacy policy