Attritor technology began as an idea developed by Dr. Andrew
Szegvari. That idea grew to become the basis for Union
Process, Inc. – and one of the most efficient grinding and
dispersing technologies in the world.
Today, in addition to the chocolate and confectionary
industries, Union Process Attritors are used in virtually every
industry including the chemical, agricultural, rubber, ceramic,
paper coating, metal powder, pharmaceutical, and cosmetic
Union Process Attritors are fast – up to ten times faster than
conventional ball mills. They’re safe, easy to use and maintain,
require minimal space, are quiet and energy efficient with good
temperature control. And Attritors produce fine, homogeneous
dispersions with a very narrow particle size distribution.
© 2005, Union Process, Inc.
® Registered trademark of Union Process, Inc.
PASSAGE OF A SMALL & LARGE PARTICLE
THROUGH A LAYER OF AGITATED MEDIA
The circulation grinding Attritor (“Q” machine) is a combination
of an Attritor, pump and a large holding tank about ten times
the size of the Attritor. The Attritor is filled with media and
contains grids which retain the media while the slurry is
pumped through at a rapid rate.
The circulation Attritor rapidly pumps the material to be ground
(slurry) through a confined bed of small agitated grinding
media. The media acts as a dynamic sieve – the fine particles
pass through easily, and the larger particles are ground more
finely, resulting in a narrow particle size distribution. The slurry
makes several passes through the Attritor until the desired
particle size is reached. Additional ingredients can be added at
any time and the slurry can be continuously monitored.
Processing can be precisely terminated.
When the chocolate liquor has a high moisture content and/or
high viscosity, the tank can be equipped with stationary arms,
as an optional accessory, to prevent the entire charge from
The Circulation Attritor has the advantages of good
temperature control due to the large, jacketed holding tank.