Refractory Materials are usually non-metallic materials having those chemical and physical properties that make them applicable for structures, or as components of systems, that are exposed to environments above 1,000 °F (811 K; 538 °C)。

Calcined flint clay

As raw materials for refractory industry in manufacturing refractory bricks and other refractory materials.

AI2O3: 44-45%
Fe2O3: 2% max
Packing: in bulk or in 1 mt big bags