Colton C

Just fired it up and it all held together perfectly. I even got to start hammering some steel! Thanks again for all your help

Got it all rammed in there, used a 3kg sand to 1kg clay ratio. Mixed with water till I had a "cookie dough" consistancy. Do I need to slowly heat it to fully dry it?

Thank you a ton, I really appericiate everyones help. I will definatly be more active on this site, its an amazing community.

I already have the silica sand and fire clay so I can use those in a 4:1 ratio?

I was going to use a ball valve on the pipe to control air flow

I welded togther a small steel box with a pipe in the bottom for air flow. I was wondering what I should line it with, I was thinking a mix of silica sand and fire clay but I don't know a good ratio. Any suggestions?

Thanks a ton for such an extensive reply! I picked up some fire clay and I was going to mix that 50:50 with silica sand, add some water, let it dry, then slow heat it to get rid of all the water. Do you think that would work better for my application? I just need somewhere for the coals to sit above the pipe attached to the blower. I will post a picture of what I have built so far. The black container is going to hold used oil eventually.

Not sure if this is the right forum to post this, someone let me know. Ill delete it and post in the correct forum if needed I built a small knife charcoal forge, my first one ever, and I was wondering about what the best homemade refractory recipe. I have seen a couple that use portland cement and perlite that people say work well, but others say not to use those because it will cause cracking and crumbling. I was wondering if someone could share a recipe that worked well for them. I have a ton to learn so any advice people can give me on refractory in general would be awesome.