1. Pregrinding the coarse, hard material with large balls
2. Use of many small balls will increase the fine fraction if the running time is increased
3. A higher mass (spec. weight) of the grinding balls will accelerate the grinding
4. Size of the Grinding Balls
Type of feed material
Hard samples feed particle size <10 mm
30 mm or 40 mm
Medium piece size (<5 mm)
Fine material (0.5 mm)
10 mm or 5 mm
Homogenisation of dry or liquid samples
Homogenisation of viscous samples
These are just clues: the size of grinding jars and grinding balls should be determined experimentally if necessary.
Choice of Grinding Jars & Balls
In order to prevent excessive abrasion, the hardness of the grinding jars used and of the grinding balls must be higher than that of the material used. Normally, grinding jars and grinding balls of the same material should be chosen.
Grinding Jar Ball Configurations
Grinding Jar Volume
Compatible Ball Weight
Dia5mm Grinding Balls (0.52 g/pc)
Dia10mm Grinding Balls (4.15 g/pc)
Dia15mm Grinding Balls (14.00 g/pc)
Dia20mm Grinding Balls (33.20 g/pc)
These values are just clues: the number of balls should be determined experimentally if necessary.
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