Induction furnace lining: how to get more heats from your ramming mass

In induction furnaces, every extra heat from a lining means lower refractory cost per tonne and fewer stops. The ramming mass matters, but so does how it is installed and how the furnace is run.

Choose the right mass

Silica, alumina and magnesia-based masses suit different metals, slags and temperatures. A mass that does not match your slag chemistry is a common cause of early failure.

Ram it properly

• Use dry, clean material from sealed bags
• Fill in uniform layers
• Compact each layer evenly, without skipping areas
• Keep the former centred so wall thickness stays even

Sinter carefully

The first melt sinters the working face of the lining. Follow the sintering schedule for your mass, with a slow, controlled rise in power and temperature. Rushed sintering leaves a weak face that erodes quickly.

Melting practice

• Avoid overheating beyond the required tapping temperature
• Remove slag regularly
• Charge carefully to avoid mechanical damage
• Avoid long idle periods at high temperature with an empty furnace

Monitor the lining

Track the number of heats, any change in power consumption and the lining condition at each inspection. Keep records so you can compare masses and practices over time.

JISPL supplies ramming masses for induction furnaces. Share your furnace size, metal and slag details for a recommendation.