Grinding mills, attritors
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attritorIn most industries size reduction falls in two general categories: crushing and milling. Crushing typically means reducing large chanks to sizes about 0,5 to 0,75 or smaller. Milling usually means reducing mmaterial to sizes in the low-micron or even nano-size range. Milling may be done wet or dry. Attrition milling technologies relate to chemical processing applications. Media milling is one common way to achive desired results.

Different types of grinding mills.The size of media affects, end result of the miling operation

Type of Mill
Media Size,in.
Tip Speed, ft./sec
Ball mill
1/2 and larger
-
Attrition mill
1/8 - 3/8
600 - 1,000
Sand mill
1/64 - 1/8
2,00 - 3,000
Small media mill
0,1mm - 3mm
1,000 - 3,000

Ball mills are more suitable for coarse materials (are used large media, ranging in size 20mm diameter and more, to produce material from about 10microns to mesh sizes.
Attrition mills are more appropriate for mid-range size particles. Such millsutilize 3-10mm media to produce material ranging in size from approximately 1 to 10 microns.
The first small media mill was named "sand mill" because it used 1/64-1/8. Ultrafine grinding - high-perfomance small media mills - produce sub-micron particle sizes by employing beads ranging in size 0,1-1mm.

Attritor mill

attrition mill for the grade of powdersIn most industries size reduction falls in two general categories: crushing and milling. Crushing typically means reducing large chanks to sizes about 0,5 to 0,75 or smaller. Milling usually means reducing mmaterial to sizes in the low-micron or even nano-size range. Milling may be done wet or dry. Attrition milling technologies relate to chemical processing applications. Media milling is one common way to achive desired results.

Attrition mills are more appropriate for mid-range size particles. Such millsutilize 3-10mm media to produce material ranging in size from approximately 1 to 10 microns.

 



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