Following characteristics of carbon blocks are desirable for its usage in furnace bottom and hearth:
Solubility resistance to hot metal
Penetration prevention of molten substances such as hot metal, etc.
Superior thermal stress resistance
High thermal conductivity
Good spalling resistance.
Keeping the above in view, new carbon blocks have been developed for improved characteristics such as:
Prevention of matrix solution by adding alumina and by adding silicon
Improvement of pore size distribution by improved forming method
Improvement of deformability and thermal conductivity by using a lot of natural graphite.
SOUTH EAST ASIA:
CENTRAL & EAST AFRICA: