Understanding Boiler Refractory And Its Types

The main purpose of refractory material that is used inside a marine boiler is to contain the heat generated by burning of the fuel in the furnace and to minimise heat losses from the furnace. It is therefore important that these materials have insulating properties and are able to withstand high temperatures. Also, the refractory to be used inside boiler furnace should not contaminate the material with which it is in contact.

Boiler refractory material should have sufficient mechanical strength and be able to withstand various forces like

• Weight of adjacent brickwork.
• Vibration action
• Cutting & abrasive action of frame
• Flue dust
• High temperature
• Sudden changes of temperature
• Load