SILICAS:

Silicas are one of the oldest materials for use as a grinding media.  They are still used where low viscosity, low temperatures, low wear rates on equipment and lower costs are required.  They do not last as long in many grinding operations and can wear quickly or do a poor job if the match to viscosity and density is not correct.  Flint Pebbles and Steatite would be an exception in that they last a long time similar to alumina medias but lower in density.

SandDensity: 2.50Hardness: 550 Vickers
Soda Lime GlassDensity: 2.50Hardness: 650 Vickers
BoroSilicate GlassDensity: 2.60Hardness: 700 Vickers
SteatiteDensity: 2.60Hardness: 520 Vickers
Flint PebblesDensity: 2.60Hardness: 600 Vickers
Quartz GlassDensity: 2.60Hardness: 850 Vickers

For more detailed information on this subject, please visit the Education & Information section.

For a quote or discussion, complete the Grinding Media Specification Form.

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Polymers

Polymers are counter intuitive due to the low density for use as grinding media. However, if the product is low viscosity and shear thinning, it can be quite effective.

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Aluminas

Aluminas are one of the most versatile medias used for grinding as it is available in a wide range of purities, sizes, shapes and formulations depending upon the type of mill and product being ground.

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Zirconia Silicates

Zirconia Silicates were the first major advancement in improved density and durability without sacrificing price when compared to alumina for a grinding media used in small media mills.

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Zirconia Oxides

Zirconia Oxide is one of the fastest growing categories of grinding medias due to its high hardness, durability, smooth surface, value and multiple options for users.

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Steels

Steel is an excellent grinding media as long as the product can tolerate metal contamination and graying.

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Exotics

The Exotic Grinding Media Section lists materials of construction that are not commonly used as a grinding media.

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Descriptions

 

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