Re: Perlite/Mizzou castable
I personally wouldn't add anything to a commercial refractory, but if you need to I think coarsely crushed firebrick would be your best economical easy to find bet. Perlite is the absolute last thing you would want to use, it is a great high temperature insulator which you are adding to an area of the oven that you want to conduct heat half way decent so it can first store heat, and eventually release it. Perlite is going to drastically reduce the conductivity of the oven dome.
You are so close to a small but totally functional oven I would really do what it needs to get there. Add a couple inches of 6:1 perlcrete on top of your structural hearth. Don't put the perlite in your dome, and finally insulate well over top of the oven. If you do that you will essentially have a miniature version of what this site is all about.
I personally wouldn't add anything to a commercial refractory, but if you need to I think coarsely crushed firebrick would be your best economical easy to find bet. Perlite is the absolute last thing you would want to use, it is a great high temperature insulator which you are adding to an area of the oven that you want to conduct heat half way decent so it can first store heat, and eventually release it. Perlite is going to drastically reduce the conductivity of the oven dome.
You are so close to a small but totally functional oven I would really do what it needs to get there. Add a couple inches of 6:1 perlcrete on top of your structural hearth. Don't put the perlite in your dome, and finally insulate well over top of the oven. If you do that you will essentially have a miniature version of what this site is all about.
Comment