Characteristics of carbonaceous products
Carbonaceous products have low thermal expansion coefficient, high thermal conductivity, good thermal shock resistance and high temperature strength. Long term use at high temperature will not soften, free from any acid and alkali erosion. It has good salt resistance and is not wetted by metal and slag. It is light quality and high quality high temperature resistant material. The disadvantage is that it is easy to oxidize at high temperature and should not be used in the oxidizing atmosphere. Carbonaceous products are widely used in high temperature furnace (bottom and hearth, lower stack), smelting non-ferrous metal furnace lining. Graphite products can be used as reaction grooves and high pressure kettle lining in petrochemical industry. Silicon carbide and graphite products can also be made into a crucible for smelting copper with gold and light alloy.