Cryogenic grinding, which introduces low temperatures during the grinding process to improve the materials' processability, offers a number of inherent advantages. Using an internally agitated ball mill, like an Attritor, amplifies those advantages, providing additional benefits. View our slide deck to learn more or visit http://www.unionprocess.com

1. Cryogenic Grinding &
Attritors
Presented by:
www.unionprocess.com

2. A Definition
Cryogenic grinding is a process of particle size reduction
that introduces lower temperatures during grinding to curb
recrystallization.
Curbing recrystallization
improves the materials’
processability by
embrittling them so they
can be fractured more
easily with mechanical
milling.

3. Advantages
Cryogenic grinding rovides important advantages over grinding
at ambient temperatures, particularly for materials that are too
soft or too heat sensitive to be easily milled under routine
conditions.
These advantages include:
• Increased production rates
• Enhanced product quality
• Greater uniformity in particle size distribution
• Higher yields of particles in the target range

4. The Attritor Edge
Cryogenic grinding is often
performed in impact mills and
hammer mills, but the use of an
internally agitated ball mill, like an
Attritor, can provide additional
benefits.
Attritors can generally grind to finer
size particle size range than impact
or hammer mills by combining the
advantages of cryogenic
temperatures with both impact and
shear forces inherent to high energy
internally agitated ball mills.

5. Other Factors
Cryogenic grinding is most effective when the product is sprayed
with liquid nitrogen as it is being conveyed and introduced into
the Attritor.
An additional benefit of cryogenic milling in an internally agitated
ball mill is the ability to fully immerse the product in liquid
nitrogen during milling.
The level of liquid nitrogen in the milling chamber can be
maintained via a thermocouple and liquid nitrogen flow controller
system.

6. Applications
Cryogenic milling is used for a wide range of materials,
including:
• Organic materials
• Plastics and polymers
• Rubbers
• Metal powders

7. Contact Us for More Details
Our skilled technical service representatives are always available
for consultation and ready to assist you with the selection of the
Attritor that best suits your particular needs.
For assistance, contact us by calling (330) 929-3333 or
by submitting this simple form.
Union Process, Inc.
1925 Akron-Peninsula Road
Akron, Ohio 44313