Kettle pizza oven

[Fizzpopbang]

 
Hey all, cheerz for having me. In my 1st post I'm turning a 22" kettle bbq turned upside down into a WF pizza oven. By the time I fit castable refractory with wool there won't be much cooking space left. Hence why I'm looking at a Rocket burner to fuel it. This would give me a cook area of 350x350mm using 4& 1/2 firebricks as the base. Plenty of access for heat travel on the back & sides while at the same time preheating the base. I have up to a 200mm hole centred in the base available to use. What I'm hoping for is your knowledge regarding if this is suitable for the heat feed into the oven or should one cut back on the diameter for a more precise heating point. The heat tube will also be insulated with Castable Ref. Any thoughts welcome. Will post pics once I started which is shortly👍 Cheerz for your time.

[downunderdave]

This is an interesting idea. I’m keen to de how it will work. If I understand your plan it is to cover the steel with castable refractory in order to increase the thermal mass, then cover that with blanket to hold in the heat. There is a problem here in the huge difference in thermal conductivity between the steel and the castable. As the steel is so much more conductive and is also facing the fire it will expand far quicker than the refractory that sits over it. This will either crack the castable at worst or create poor contact between the steel and castable at best, reducing heat transfer via conduction. You’d be better off just using the kettle as a mould and cast a 2” thick refractory dome only. The rocket stove idea is a possibility but it will use valuable floor space.