SURYA Heat-A is a high purity, high alumina castable of exceptional quality with an alumina content of over 90% and with very low silica and iron contents. Hence, it is used for service temperatures up to 1750ºC and can resist attack from process gas atmospheres containing carbon monoxide and hydrogen. SURYA Heat-A is particularly suitable for use in coke ovens, gas production plants as well as gasification plants and is also used: • in the iron and steel industry for lining blast furnaces and for skew backs, ports and roof lining of arc-melting furnaces • in the non-ferrous metal industry to line reverberatory furnaces where high purity aluminium is produced • in reactors of refineries as well as in fertiliser plants where castables with a high degree of resistance to carbon monoxide, hydrogen and ammonia are desired • for lining of preheaters/converters and on all transfer lines