Fireclay sand required for a diy tandoor

[dexter7205]

Hello Members,

This is my first post here and my knowledge is low about the topic. Please go easy :-)

Background

I built a diy tandoor a few years ago(using popular instructions on youtube) and used it very often until the pot broke and vermiculite started dripping into the charcoal area. I disassembled it and next attempt with terracotta pot did not last long either.

I found some bentonite kitty litter clumping clay and built another one by hand(mix sand + bale) but that did not take any load. I learned later that bentonite is not a good clay for this since it retains too much water.

Fourth attempt

Trying to follow instructions on https://imperpro.ru/en/tandyr-svoimi-rukami-55-foto-sovety-po-stroitelstvu-i-ekspluatacii-delaem/

I got kaolin clay a couple 50# bags. But i do not understand what the writer means in the article by fireclay sand. The clay stores i contacted sell fireclay and sand separate. Do they mean Grog?

Quoting from the above article

"To get started, prepare the necessary materials:

• kaolin (aka chamotte clay);
• fireclay sand;
• sheep's wool - you can take camel, if, of course, you can find it;
• an ordinary wooden barrel;oil - vegetable is suitable."

Questions:

• Which fireclay or sand mixture can I use?
• If sand is needed, do i use all purpose sand or play sand?
• Sheep's wool is difficult to find here, camel hair is even more difficult. Is bale hay/straw a good substitute?

Thank you for reading my post this far. Appreciate your time/input on this.