#1  
Old 04-11-2008, 10:25 AM
Frances's Avatar
Il Pizzaiolo
 
Join Date: Aug 2007
Location: Allschwil, Switzerland
Posts: 2,186
Default Pompeii oven as a kiln?

mmmhumous asked this on my thread and I think its a really interesting question...

So what do you all think, would it be possible to use a pompeii oven as a kiln? Say to glaze tiles or fire pottery?
Reply With Quote
  #2  
Old 04-11-2008, 10:31 AM
DrakeRemoray's Avatar
Il Pizzaiolo
 
Join Date: Mar 2006
Location: Littleton, CO
Posts: 1,211
Default Re: Pompeii oven as a kiln?

At a minimum I would be worried about eating pottery glaze on my pizza...

Drake
Reply With Quote
  #3  
Old 04-11-2008, 10:50 AM
dmun's Avatar
Moderator
 
Join Date: Jul 2005
Location: New Jersey USA
Posts: 4,216
Default Re: Pompeii oven as a kiln?

We use the same refractory materials that kiln builders do. I don't think it's a good idea, though. Heavy metals and all that.
Reply With Quote
  #4  
Old 04-11-2008, 11:56 AM
Master Builder
 
Join Date: Mar 2008
Location: Washington State USA
Posts: 778
Default Re: Pompeii oven as a kiln?

FWO are not designed or built for firing ceramics but that's not to say it couldn't be done.

I think you would have to define exactly what you mean by ceramics. Certainly if one wished to fire long and hard one could create some level of fusion of either a porcelain or teracotta. Perhaps a teracotta as in cheap inexpensive Mexican (or other third world) type pottery. Procelain would be more limited but I suspect under something like a small overturned flower pot over a unglazed plate could create a suitable environment for fusion. And certainly the low lead based glazes would also work although there is the mentioned problem of heavy metals. Perhaps one could create some interesting small pieces. But control of temp and time would be problematic and the wear and tear on the oven would be, I suspect, considerable.

I also used to do enameling, a small home business, and it has been a couple of years since I did any firing. Enameling is sort of between ceramics and glass work. Temps are comparably low running from just around 800 F to 1300 F or so. I built my own computer controlled muffled kiln or furnace and so I have a little experience with such things. I have toyed with the idea of "ground coat" enameling the inside of the steel dome which I am building my WFO. The ground coat is the first layer used on enameled steel, it's the coating on the inside of your conventional kitchen stove. I expect it would burn off directly above the fire but the rest of the interior should be fine. When the weather becomes more tolerable I will be doing some test pieces.

Here's a photo of some of the sort of stuff I used to do. The two on the left are on steel and the three on the right are on ceramic tiles.

Wiley
Attached Thumbnails
Pompeii oven as a kiln?-enamled-work.jpg  
Reply With Quote
  #5  
Old 04-11-2008, 02:20 PM
james's Avatar
Brick Oven Merchant
 
Join Date: Mar 2005
Location: Pebble Beach, CA
Posts: 4,648
Default Re: Pompeii oven as a kiln?

Quote:
Originally Posted by dmun View Post
We use the same refractory materials that kiln builders do. I don't think it's a good idea, though. Heavy metals and all that.
I'll second that. I don't think food and glazes should mix. :-)

James
__________________

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
Reply With Quote
  #6  
Old 04-11-2008, 03:56 PM
asudavew's Avatar
Il Pizzaiolo
 
Join Date: Jul 2007
Location: san angelo, texas
Posts: 1,877
Default Re: Pompeii oven as a kiln?

I used to be a decent potter.
Most glazes fire at around 2300f.

I don't think you could ever get the oven that hot.

Kilns are made with insulating bricks that are fine up to 2300-2700.

But you sure could build a small kiln out of expanded metal and a ceramic insulating blanket.
__________________
My thread:

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

My costs:

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

My pics:

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
Reply With Quote
  #7  
Old 04-11-2008, 04:30 PM
brokencookie's Avatar
Journeyman
 
Join Date: Oct 2007
Location: Pacific Northwest
Posts: 376
Default Re: Pompeii oven as a kiln?

the only glaze that goes near my food is Rosemary Rhubarb Glaze

Bruce
__________________
Sharpei Diem.....Seize the wrinkle dog
Reply With Quote
  #8  
Old 04-12-2008, 02:53 AM
Frances's Avatar
Il Pizzaiolo
 
Join Date: Aug 2007
Location: Allschwil, Switzerland
Posts: 2,186
Default Re: Pompeii oven as a kiln?

Thank you for discussing the idea...

My main thought was to glaze some shards of pottery for the mosaic on the outside of the oven... but if that means I risk ruining the inside of the oven - I think I'll give it a miss.

Hey, I could always build a kiln beside the pizza oven!
Reply With Quote
  #9  
Old 04-16-2008, 03:55 AM
david s's Avatar
Il Pizzaiolo
 
Join Date: Mar 2007
Location: Townsville, Nth Queensland,Australia
Posts: 4,832
Default Re: Pompeii oven as a kiln?

For a pottery kiln you need insulating refractory rather than dense refractory and to achieve the higher temps required you really need a downdraft system ie the flue enty at floor level so the flames rise and then are pulled down and out. Wood fired kilns typically take days to reach stoneware temps (1200+ C)
Earthenware temp a little easier at 1150 + C and porcelain 1300 C Fuel required to go from 1000 to 1200 would be more than that required to get to 1000 because of expotential heat loss the higher you go. Forget trying to fire pottery in an oven designed to cook food that only goes to a piddlng 400 C

Sorry about the temps in centigrade for you lot back in the dark ages, I'm sure you can convert the numbers. Not so sure about yor systems. Joking
Dave
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Oven Curing james Firing Your Oven 335 07-15-2014 07:12 PM
All things being equal Lester Newbie Forum 13 12-21-2009 01:26 AM
Pompeii oven - too thick? dmun Pompeii Oven Construction 18 07-24-2008 05:12 PM
Considering build of Pompeii oven jet Pompeii Oven Construction 21 05-10-2008 12:14 AM
Why we did the Pompeii Oven james Introductions 0 03-21-2005 03:48 AM


All times are GMT -7. The time now is 05:42 PM.

Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO 3.6.0
2006/10 Forno Bravo, LLC