DO NOT attempt refractory lining design or construction based on this information. After all, the company is old enough to speak for itself. This list is by no means exhaustive.
Refractory materials are in use in almost all heavy industry.
Milling operations at mines of many types need to dry ore before processing it for shipment to a smelter where, refractories are again used as the metal is melted and processed into ingots. Once these ingots arrive at a factory, they are often melted, or at least softened with heat for manufacture. Once again refractories are used both in the shaping of the metal products, and then their heat-treatment. The Metals Industry is not the only place refractories are needed though. Concrete is made with Portland Cement.