Relining the furnace is time-consuming and requires as much time to be given. Moreover, it adds to the cost by way of consumption of costly ramming mass and sintering power. It is extremely important to achieve a high lining life. Lining life as high as 200 heats of CI per lining can be achieved in the medium frequency of 250 kW-550 kgs capacity furnace.
The good quality lining material is one of the most important factors in obtaining a high lining life. A good lining material should reveal the following properties.
- Good strength
- Good refractions
- Resistance to slag penetration.