The answer to this question has a few answers.
Ceramic fire brick forge.
I would recommend using a brick with a 2800 f temp rating.
Kiln bricks also referred to as fire bricks or refractory bricks are made from ceramic refractory material that can withstand extremely high temperatures such as those achieved in kiln firings.
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So which fire bricks should you.
Refractory materials are non metallic ceramic materials that can withstand high temperatures.
Firebricks are used to line the inner surfaces of furnaces kilns and forges.
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Dense firebrick is a heat sink.
As such they are extremely useful to hobbyist blacksmiths and machinists who wish to build their own forge or foundry.
Can i line a forge with firebrick.
A firebrick or refractory brick is a ceramic brick made from refractory material that can withstand high temperatures.
They have low thermal conductivity and are excellent for forging or fireplaces.
The bricks typically line the inside of a kiln furnace fireplace etc and serve as great insulators making heat loss minimal and energy use.
Yes you can line a forge with soft insulating firebrick.
They are often used in a number of industrial applications such as furnaces kilns foundries incinerators and reactors.