Refractories are materials that can endure high temperatures without softening or deformation in shape. Refractories are mainly used for construction of lining in furnaces, kilns, converters, etc. Refractory main function remain to bear up and maintain high temperatures and to resist the abrasive and corrosive action of molten metals, slags and gases. A refractory material keeps its strength at high temperatures. Refractory materials are also used to make crucibles. Refractory products are used in all industrial high-temperature processes. Refractories are used for the manufacture of cement, glass, ceramics, paper and metals, both ferrous and non-ferrous.