Randalusite Premium

Imerys Refractory Minerals offers the purest andalusite grade ever put on the market

Randalusite™ Premium is a high purity andalusite (Alkalis <0.35% & Alumina >60%) obtained by advanced processing designed for high performance bricks & castables, opening doors to new applications for andalusite based refractory solutions.

CHEMICAL & MINERAL COMPOSITION

  • Al2O3
  • Randalusite™
    Premium 3-8
  • Randalusite™
    Premium 1-4
  • Al2O3
  • 60,5

  • 60,1

  • Na2O + K2O
  • 0,20

  • 0,24

  • Fe2O3
  • 0,62

  • 0,73

  • Andalusite content
  • > 97%

  • > 96%

KEY PROPERTIES

  • Refractoriness under load at 0,5% compression increase by approximately 30°C compared to standard andalusite
  • Creep in compression rate at 1500°C shows a greatly decrease of value
  • High thermal shock resistance

TEST RESULTS

High chemical and mineral purity improving subtantially refractory thermo-mechanical performances,
for instance on andalusite based bricks:

*Refractoriness under load & creep in compression at 1500°C on bricks according to European standards EN 993-8 and EN 993-9

Test the purest andalusite of the market. Samples available on demand.