Steel is an excellent grinding media as long as the product can tolerate metal contamination and graying.
It is a high value media because of its low cost, high density, hardness and can be removed from the product stream with a magnet. Balls have a very narrow particle size distribution.
NOTE: Make sure that the steel shot being purchased for use as a grinding media has been manufactured for this specific purpose. Standard off-the-shelf shot will tear up a mill and its screen.
Density 7.6
Hardness: 30 HRC up to 65 HRC
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.
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.
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.
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.
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.
Exotics
The Exotic Grinding Media Section lists materials of construction that are not commonly used as a grinding media.
