fixfireleo
starting to shine!
Member since March 2014
Posts: 30
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Post by fixfireleo on Mar 25, 2014 14:57:10 GMT -5
I want your input. living in ohio, i can get all the ohio flint i want. i have seen on another site that someone got great results heating it between 450 and 500 degrees for 4 to 5 days. i dont want to run my oven that long and the price of a kiln is OUTRAGEOUS!! so, i was inspired by how i got rid of a stump in my yard. it was about 6 inch diameter. i made a circle out of some scrap sheet metal about 12 inches in diameter and about 8 to 10 inches tall. put some rocks on bottom to allow air to get in, soaked stump in charcoal starter fluid, added charcoal briquettes and let it burn for about 4 days, adding new briquettes once a day. after it burned out, the ground stayed hot for awhile!
keeping this in mind, i wonder how hot coals are? maybe i could cover the rocks with a thin layer of dirt (1/2 inch maybe) and then use same set up. think i could get somewhere around 450 to 500 degrees and keep it there several days at the cost of a bag of charcoal? thanks. gonna ask advise in separate topic about saws and grinders!
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Sabre52
Cave Dweller
Me and my gal, Rosie
Member since August 2005
Posts: 20,487
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Post by Sabre52 on Mar 25, 2014 16:50:37 GMT -5
I figure probably native Americans used a similar technique but I do know that around here when flint is under a burn pile, it explodes with vigor due to expansion of moisture in the stone. I think you probably have to figure a way to slowly heat it up to temperature to burn off the moisture before heavy heating. Maybe James will chime in as he heat treats a lot of coral and may know how deep it has to be buried in the soil to provide a slow initial heating process.....Mel
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Post by orrum on Mar 25, 2014 18:31:43 GMT -5
I have a friend does knapping rocks n flint in a crock.pot with layers of sand. Slow increase of temp and slow decrease or like da man said they explode. He said it stinks so do it outside. Some change colors and some dont hut if they survive they knap easier. They also chip like obsidian when you try to preform them on a 100 grit wheel!!! I never treated any but have cabbed some of his montana agate and flame agate that was heat treated.
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Fossilman
Cave Dweller
Member since January 2009
Posts: 20,709
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Post by Fossilman on Mar 26, 2014 9:40:08 GMT -5
James has a great recipe for treating flint and coral.....Good luck
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fixfireleo
starting to shine!
Member since March 2014
Posts: 30
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Post by fixfireleo on Mar 26, 2014 15:56:18 GMT -5
ok. cool. hopefully james will see the thread.
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