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®, Clayrac™ and CHK™ lines.
Our Mulcoa range of calcined materials is recognized as the global benchmark. Mined from the South Georgia kaolin belt in the US, clays are blended to obtain chemistries between 45 and 70% alumina for both, Clayrac produced in the Bordeaux region of France or CHK™ manufactured in Ukraine, with alumina content from35% 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
Clayrac and CHK form our range of high-duty and super-duty chamotte materials for general purpose refractory applications. These products are available as sized or run of kiln.
Mulcoa are a mainstay of refractory production, wherever volume stability, resistance to carbon monoxide attack and all-round performance is required.
At Imerys Refractory Minerals we produce mullite-based chamotte for sanitaryware and floor tiles production.
Mullite offers shrinkage control and and controlled thermal expansion and enhances the mechanical strength and whiteness of a ceramic body.
Discover our Clayrac ™ range of sanitaryware chamotte (Clayrac Epurée, Clayrac SMD and Clayrac SHD)
Clayrac sanitaryware chamotte range
Our Mulcoa product is a high alumina chamotte with alumina content going up to 70%.
Our CHK C1 is renowned for its high expansion.
All individual technical datasheets are available upon request.