So I've converted another little electric kiln to run propane. My plan is to use it exclusively, for soda firings (by exclusively I mean I have no other kiln to use - even for bisque, so this one has to work, somehow).
I've done two firings - one straight propane, the other with soda (Gail Nichols' method of chunks, but inserted with pieces of tree bark). They were successful in that nothing blew up (note they weren't bisqued) and they reached them, but not so much for the soda. The system I currently have is far from perfect, and will probably never work the way it's set up. (I have three shelf supports placed in front of three separate ports, where I gently place the soda/wood. It pretty much just sits right there, doesn't disperse through the kiln more than an inch or two.)
I'm thinking of remodeling it. And am wondering:
Is there any reason I can't make this thing a cross-draft? Is there a particular size need for a firebox - a size I wouldn't be able to obtain? Will a cross-draft concept not work with a flat roof?
Here's my thought: Make two chambers like this fella did: http://www.youtube.c...h?v=iD3hcHQrfkY
One for the chimney, as he did, and one on the opposite size of the kiln, but with the board going only part-way up, acting as a bag wall.
Having no knowledge of kilns, I'm certain this idea of mine is ridiculous. But wondering why. I realize I'd be left with a very small stacking space, but I already have that now, as I'm staggering 1/4-shelves all over the place and leaving large spaces to introduce the soda. I'm hoping that, if I can do this crossdraft thing, I would 1. Be able to concentrate the soda introduction into one, protected, space - the firebox. And 2. Have an easier time stacking the shelves - as they would be uniform size and shape, each stacking on top of another (instead of cantilevered between two or three other shelves and the floor).
Any help would be so greatly appreciated.
I should add I have another, smaller kiln (the one described above is ~ 7 cu ft and the smaller one is ~ 3 cu ft) that I could use ... Not sure how. As a firebox, somehow? Hmm. Would love to hear any ideas you have. I might post pics...