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synj00

Cone 10 With Lp Gas And Soft Brick?

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It just occurred to me that we did an experiment with raku a year or so ago with some soft brick that I have since gotten rid of. I didnt have a temperature gauge or anything but do you think that with a big enough tank and enough soft brick to build something conducive for airflow would it reach cone 10 in a few hours? This would allow me to experiment with glazes, build different configurations, reduction and all that kick@%% stuff :-)

 

Tell me good news!

 

Thanks All!!

Sebastian

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I had a friend build a test kiln in college that fired to ^10 with a bunsen burner. It was the size of a small shoe box. It depends on size you are talking about. You should have double walls 9" thick and the higher temperature soft bricks. They come in various grades for temperature.  K-28 etc.

 

Marcia

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Guest JBaymore

Can be done.  The core task is keeping the combustion happening inside the small chamber....and not having a flame path that causes a good portion of the heat energy to be realized after it exits... or not at all (unburned gases).  For best luck, get (or build) a small forced air burner.

 

Most commercial larger gas kilns (like Bailey's) are no more than 4 1/2" of insulating firebrick.  They are not as efficient as better insulated kilns nor do they cool as slowly (less insulation value AND less thermal mass),,,,, but they work fine. 

 

The size of the liquid fuel storage relative to the total BTU requirement will be the next 'challenge point'.  As you draw gas it uses the heat energy stored in the fuel to cause evaporation.  As you evaporate gas, it cools the storage.  As the storage cools, less will evaporate.  So you need to be able to continue to evaporate enough BTUs throughout the whole cycle to reach temperature. 

 

Do some research.  There is a lot here in the CAD forums and in other places online that should point you in the right direction.

 

best,

 

......................john

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Guest JBaymore

I had a friend build a test kiln in college that fired to ^10 with a bunsen burner. It was the size of a small shoe box. It depends on size you are talking about. You should have double walls 9" thick and the higher temperature soft bricks. They come in various grades for temperature.  K-28 etc.

 

Marcia

 

 

In my kiln class, to make a point, I have sometimes demo-ed making a tiny gas kiln with a few IFBS, and a plumber's propane torch.  Works just fine.

 

best,

 

......................john

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