There are a few choices for the refractory lining i am using itc 100 ht which looks like a cement mortar however it can with stand extremely high heats.
Ceramic forge lining.
This video answers subscriber questions on the types of linings i considered to insulate my propane forge including hard concrete firebrick ceramic firebric.
Yes you can however a forge with a casted liner is usually very inefficient.
To cure it you want to dry it slowly.
The ceramic blanket and board needs to be stabilized so fibers do not become airborne when the forge is in operation.
Next apply the satanite to the wool using a paintbrush covering all exposed wool surfaces.
Clay suitable for making.
Can i cast my liner and skip using ceramic fiber blanket to line my forge.
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Coal forge linings revisited by clay they mean clay of any type but preferably a clay with a placticity like good potters or artists clay.
Spray the ceramic fiber insulation down using water with a hand sprayer to wet it lightly.
High temperature tools refractory is your source for refractory and other knifemaking supplies.
Forge supplies castable refractory plistix 900f kaowool mizzou satanite greencast 94 forge kits brick pizza oven smoker insulation kiln casting.
The liner becomes more of a heat sink much like dense firebrick and makes high temps needed for forging forge welding much more complicated if not impossible in some instances.
These work up stiff and harden without cracking severly.