Containing up to 60% alumina, andalusite transforms into mullite at low temperatures of between 1,200°C and 1,550°C. This refractory mineral offers properties such as high resistance to degradation in extreme temperatures and harsh operating conditions as well as resistance to mechanical failure and corrosion.

Andalusite is prized for the production of high-quality acid refractory products requiring high-alumina content.

In the investment casting market, it is used as well for the production of sand moulds and cores for steel and iron casting.

Physical properties:

- Outstanding creep resistance

- Very good refractoriness under load (RUL)

- Low thermal expansion

- Low thermal conductivity

- Good chemical stability

- Excellent thermo-mechanical stability

- Excellent thermal shock resistance

- Oxidation resistance