How do you make Fire Clay?

Look what this guy did:

I built a neolithic updraft kiln last summer with

hard brick. I saw a design from 125 B.C.E. Rome that had

a removable top to get the pots in and out without a lot

of rebuilding. (The first "Weber") The kiln fired like a

dream for me but the weber top was pretty brittle and

cracked when I opened it up after cool down. My mix was:

50% Silica sand

20% Fire clay

20% red art clay

10% local earth clay

Straw and H20

I mixed it with my feet in a 300 gallon cattle tank.

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Do you have a kiln? Do you have a cattle tank?

If so, u r n business for brick making!

i would think perlite and clay mixture, with mesh, like chicken wire lathe

Fire clay brick is made of clay(shale, coal gangue, etc.) as the main raw material by mud handling, molding, drying and firing.