Primitive Archer

Main Discussion Area => Flintknapping => Topic started by: Allyn T on March 27, 2020, 06:39:06 pm

Title: Make a kiln?
Post by: Allyn T on March 27, 2020, 06:39:06 pm

How difficult is it to make a kiln from scratch using fire brick?

Title: Re: Make a kiln?
Post by: JEB on March 27, 2020, 08:37:39 pm

You posted on the flintknapper  thread so I am guessing you want to cook rock. The easy way would be to buy a turkey roaster at a yard sale and use it.

Title: Re: Make a kiln?
Post by: Allyn T on March 28, 2020, 10:39:32 am

I do indeed wanna cook rock. Most of what I find on job sites is tough and grainy

Title: Re: Make a kiln?
Post by: Russ on March 28, 2020, 11:52:02 am

turkey roaster is probably the best

Title: Re: Make a kiln?
Post by: Allyn T on March 31, 2020, 08:21:11 am

Does a toaster over work if I can t find a turkey roaster

Title: Re: Make a kiln?
Post by: Russ on March 31, 2020, 10:22:33 am

yeah sure as long as it gets to the right temps.

Title: Re: Make a kiln?
Post by: JEB on March 31, 2020, 03:57:52 pm

Look on craigslist for a roaster. I can't speak on a toaster oven.

Title: Re: Make a kiln?
Post by: Allyn T on April 01, 2020, 11:48:37 am

Alright thanks guys

Title: Re: Make a kiln?
Post by: paulc on April 03, 2020, 08:37:42 am

Ive heard lots of good about toaster ovens.  Never used on myself.  FWIW  P

Title: Re: Make a kiln?
Post by: Hawkdancer on April 03, 2020, 11:44:33 am

No experience with either, but I would think you definitely want a variable temperature control up to about 500 degrees F.  You can also use an old charcoal grill with sand over and under the rock and a 20# bag of briquettes, that was posted a while back by some one who is smarter than me!
Hawkdancer

Title: Re: Make a kiln?
Post by: Allyn T on April 03, 2020, 08:01:44 pm

Charcoal grill sounds good too

Title: Re: Make a kiln?
Post by: Tower on April 04, 2020, 08:08:40 am

My preferred method of heating stone is in the ground .... when I have the time. But I have heated a lot of stone w/ a turkey roaster. If you take the pan out. Bed the bottom w/ a lil bit of sand or dirt it will just barely get to 500* . With the pan in only about 450*
It’s easier to control the heating times on larger stones to lessen the chance of crazing.   It’s even works on most low grade stones. 

Title: Re: Make a kiln?
Post by: Allyn T on April 07, 2020, 08:14:51 pm

I honestly don't know how good this rock is but some seems decent

Title: Re: Make a kiln?
Post by: Russ on April 07, 2020, 08:17:10 pm

pics?

Title: Re: Make a kiln?
Post by: mullet on April 08, 2020, 08:28:57 am

I've used a Black&Decker toaster oven for years, on the second one now. I bought both at Flea markets for $5 a piece. It gets up to 550 degrees and works for most of the rock I need to cook.

Title: Re: Make a kiln?
Post by: Allyn T on April 13, 2020, 12:36:49 pm

I'll have to take some when I'm home

Title: Re: Make a kiln?
Post by: Allyn T on April 20, 2020, 11:48:00 am

Here is some rock I have
(https://i.imgur.com/sLpQbos.jpg)
(https://i.imgur.com/XDoXl9m.jpg)
(https://i.imgur.com/84g0oCY.jpg)