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The Main Differences Between Insulation Bricks and Fireproof Bricks

  • RS Kiln Refractory
  • Apr 8, 2018
  • 2 min read

There exists a difference between common insulating bricks and fireproof bricks. You will need to understand the basic difference because insulating bricks use a lower thermal conductivity than fire bricks. They are able to only be used in certain applications. This is as they do not absorb heat well.


When you are building an oven you would probably not use insulating bricks, you would use insulating fire bricks. These may prevent the chamber from losing the high temperature that it must have to hold to work correctly. If it didn’t, it will not be able to cook food. Insulating bricks can be utilized externally in the oven should they be used as a way to preventing any of the internal heat from escaping nonetheless they can not be uses as a technique of stand-alone bricks for an oven.


Fireproof bricks were once called firebricks but a majority of people still talk about them as clay bricks. This is because they are often created from fireclay which happens to be usually based on mud. Fireclay is not difficult to source outdoors but it must contain enough silica and alumina to be effective because the bricks will likely be intended. More often than not fireproof bricks are used in ovens and also fireplaces. They are able to also line industrial furnaces.


These bricks may also be used in wood heaters as linings. They can be a lot more dense than common insulating bricks. Additionally, they contain lower porosity and will withstand high heat for a very long time. The differences between common insulating bricks and fireproof bricks are basic but important.


Fireproof or fireclay bricks will be the only ones that should be used to heat substances at quite high temperatures. Insulating bricks can be applied externally to complete the job of providing added insulation but usually do not hold up against high heat. More refractory information here: http://kilnrefractory.com.

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