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VIRGINIA MULLITE™ IS VERY LOW IN IMPURITIES COMPARED TO OTHER TRADITIONALLY SINTERED MULLITE

refractoriesMullite rarely occurs as a mineral in nature. The word mullite is derived from the Isle of Mull off the Scottish coast, where the only naturally occurring deposits of mullite have ever been found.

Mullite is a mineral with a very high melting temperature of 184crystals0° Centigrade.  It is a premier acidic refractory mineral; it has no polymorphic inversions and possesses a low thermal expansion coefficient of 5.3 x 10 -6°C. When mullite re-crystallizes in a ceramic or a refractory it forms as small lenticular crystals which promote high strength, even at very high temperatures.

mull-kilnVirginia Mullite™ produced by Kyanite Mining Corporation is purer than most sintered mullite and is very volume-stable. Virginia Mullite™ contains about 80% mullite, 11% finely dispersed amorphous silica, 3 -6% quartz, and about 2% cristobalite.  It is also different in particle shape and impurities than mullite formed by calcining clay minerals.

View pdf files: Mullite Material Safety Data Sheet

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“Virginia Mullite™ is produced by sintering in a rotary kiln at a temperature  in excess of 1450°C and is a key ingredient in many refractory, ceramics, kiln furniture, foundry and electrical insulators. It is used in sanitary ware for providing excellent strength to the body and volume stability. It is used in brake shoe linings, and widely used in foundries as refractory coatings for various metal castings.”



Kyanite Mining Corporation • 30 Willis Mountain Plant Lane, Dillwyn, VA  23936  USA • Phone 434.983.2085 • Fax 434.983.4342

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