#11  
Old 08-20-2009, 09:21 AM
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Default Re: Steel Dome Oven On A Trailer

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Originally Posted by pacoast View Post
Yes steel has a greater thermal flux density, hence the question about whether the thick walls were a compensation or not. The majority of brick ovens have 4" walls. But a lot of ovens, specifically mobile ones that use cast refractory or ceramic prefab have 2.5" walls & are generally regarded to work just fine. So it's a valid option to consider using 2.5" walls. If it suits the OP goals, it would save him a lot of time, money & weight.

.
Yeah, I may have to reconsider the 4" thickness. If 2.5" will get the job done, and for all the reasons you mentioned... time, weight, money, that may be the new plan. I could also double up with the ceramic insulation and still have the thermal properties.

I appreciate the input.
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  #12  
Old 08-29-2009, 10:02 PM
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Default Re: Steel Dome Oven On A Trailer

I will be building an oven using a steel dome inside another steel dome, and it got me to ask why you need to use refractory cement if you have the steel against the fire.
why not use concrete or stucco for the thermal mass?.
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  #13  
Old 08-30-2009, 07:14 AM
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Default Re: Steel Dome Oven On A Trailer

Because the concrete will break down at oven heat.

If you are using two steel domes, why not just pound in foundry sand between the two layers? That will get as hard as it needs to be, and won't crack up in road vibration conditions.
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  #14  
Old 08-30-2009, 07:57 AM
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Default Re: Steel Dome Oven On A Trailer

I read somewhere (gonna look it up again) that low iron clay was used in fire brick because the high iron content would rust and the smell could permeate the food being cooked. Would a steel dome have the same problem?
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Old 08-30-2009, 08:25 AM
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Default Re: Steel Dome Oven On A Trailer

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Originally Posted by metalmaster View Post
I will be building an oven using a steel dome inside another steel dome, and it got me to ask why you need to use refractory cement if you have the steel against the fire.
why not use concrete or stucco for the thermal mass?.
Hey metalmaster...what size metal domes are you planning on using? I had initially considered using a dome inside a dome but ran into the problem of finding a dome large enough to go over my 40" dome...I talked to a manufacturer and they quoted me around $1500 for a 48" dome, if they had it in inventory, because they wouldn't be doing a run for one piece. So, I moved on to creating a refractory layer over my dome and then insulating that, followed by a stucco outer finish.

To answer your question...as Dmun said, concrete will break down under high heat.

I'm interested in how you are planning to put it all together...are you going to weld the domes to steel plate? What kind of insulated base are you planning on making?
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  #16  
Old 08-30-2009, 08:47 AM
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Default Re: Steel Dome Oven On A Trailer

we found an old mooring bouy that is 58" in diameter.
will have to give the concrete idea some more thought.
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  #17  
Old 08-30-2009, 12:58 PM
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Default Re: Steel Dome Oven On A Trailer

Any material with water added to it will be problematic if you have a steel inner and outer dome. I'd be worrying about creating a bomb. That steam will be sealed between the steel, remember that water expands 1000 times.
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  #18  
Old 08-30-2009, 01:40 PM
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Default Re: Steel Dome Oven On A Trailer

we will add a vent if we decide to go with that idea.
having built several steam locomotives to run around our backyard track we are familiar
with the power of steam, but i do appreciate your input
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  #19  
Old 08-30-2009, 03:43 PM
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Default Re: Steel Dome Oven On A Trailer

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having built several steam locomotives to run around our backyard track
Pictures.... we want PICTURES.
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  #20  
Old 08-30-2009, 08:35 PM
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Default Re: Steel Dome Oven On A Trailer

sorry for the thread hijack
i will be starting a new thread under other oven types.
will post some pics of train track later.
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