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.

Sand Density: 2.50 Hardness: 550 Vickers
Soda Lime Glass Density: 2.50 Hardness: 650 Vickers
BoroSilicate Glass Density: 2.60 Hardness: 700 Vickers
Steatite Density: 2.60 Hardness: 520 Vickers
Flint Pebbles Density: 2.60 Hardness: 600 Vickers
Quartz Glass Density: 2.60 Hardness: 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.

Flint Pebbles Chinese Man Made

China Flint Pebbles – natural & hand-cut

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Low Alkali Glass with Borosilicate

Low Alkali Glass with Borosilicate

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Molded Soda Lime Glass Beads

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Resin Coated Sand 2040

Resin Coated Silica Sand

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Silica Sand

Silica Sand

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Soda Lime Glass Beads

Soda Lime Glass Beads

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Steatite Magnesium Silicate Satellites

Steatite magnesium silicate satellite balls

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Unpolished French Flint Pebbles

French Flint Pebbles – natural

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Borosilicate Glass Beads

Borosilicate Glass Beads

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Steatite Beads

Steatite magnesium silicate beads

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Steatite Cylinders

Steatite magnesium silicate cylinders

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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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