Imerys Refractory Minerals is the world’s leading producer of calcined products for the refractory industry.
Our brand portfolio is comprised of the well-known Mulcoa®, CHK™ and Super Ecca Chamotte lines.
Our Mulcoa range of materials is recognized as the global benchmark. Extracted from the South Georgia kaolin belt in the US, clays are blended to give chemistries between 45 and 70% Alumina.
Our Super Ecca Chamotte is a South African product available in various sizes with an alumina content of 43%
CHK Run of Kiln products are produced in Ukraine, with alumina content between 35% and 45%.
The transformation of clay into mullite generates a structure that gives the product the required characteristics for refractory applications :
Good creep resistance
Low thermal conductivity
Excellent thermal stability
Good thermal shock resistance
Resistance to most chemical attacks
Mulcoa is a mainstay of refractory production, wherever volume stability, resistance to carbon monoxide attack and all-round performance are required.
At IMERYS REFRACTORY MINERALS we produce mullite-based chamottes for sanitaryware and tiles production.
Mullite offers shrinkage control and controlled thermal expansion and enhances the mechanical strength and whiteness of a ceramic body.
Discover our Clayrac™ range of sanitary ware chamotte (Clayrac™ Epurée, Clayrac™ SMD and Clayrac™ SHD)
Clayrac sanitaryware chamotte range
Our Mulcoa product is a high alumina chamottes with alumina content going up to 70%
Our CHK C1 is famous for its high expansion
Individual technical datasheet is available upon request.
Alumino-silicate is particularly used for moulds requiring high refractoriness and creep resistance, as in casting of large steel or titanium alloys.
For sized materials:
Mulgrain® grains and flours are superior ceramic refractory mould media. These grains are precisely sized through a series of screens, and custom blended to obtain a series of coarse to fine sizes. During screening the grains are de-dusted to ensure a virtually dust free stucco.
Individual technical datasheets are available upon request
Super Ecca Chamotte main products for foundry are 0.25/0.7mm and 0.7/1.2mm.
Other sizes and technical datasheets are available on demand.
For run of kiln materials:
CHK™ our chamotte from Ukraine offers alumina (44%) and low alkalis content.
IMERYS REFRACTORY MINERALS supply a whole range of products suitable to produce cordierite kiln furniture bodies that are formulated with 50% cordierite (Clayrac™ Artal), the remainder comprising mullite (Molochite-based or chamotte-based) and amorphous material.
Clayrac, CHK and Mulcoa form our range of high-duty and super-duty chamotte materials for general purpose refractory applications. These products are available run of kiln or sized
Clayrac refractory chamotte range
Clayrac Artal is a unique cordierite chamotte with low expansion making it particularly useful for high thermal shock material.
Individual technical data sheets are available on demand.