Author Options:

How to make a kiln that works on gas an oxygen? Answered

To produce a temperature of about 2000c how can one make a kiln at home? What are the raw materials needed?


The forums are retiring in 2021 and are now closed for new topics and comments.
Jack A Lopez
Jack A Lopez

1 year ago

A while back, I recall reading about something called a "tube furnace" over on the ScienceMadness Wiki, here:


But looking at that more closely, I am thinking most of those were in the "high refractory" category. That is refactory materials with melting points in the range 1780 C to 2000 C.

I should also mention, regarding that category I am calling "high refractory," I cribbed that from the Wikipedia article for "Refractory"


from the section titled, "Based on fusion [melting] temperature"

That section does not cite any references, so maybe somebody just made these categories up, but that section suggests three broad categories (normal, high, super) of refractory material:

Normal refractory: fusion temperature of 1580 ~ 1780 °C (e.g. Fire clay)
High refractory: fusion temperature of 1780 ~ 2000 °C (e.g. Chromite)
Super refractory: fusion temperature of > 2000 °C (e.g. Zirconia)

Greater than 2000 C, and we are needing the "super refractory"

Which means your planned furnace is really, Hot! Hot! Hot!

(In other words: Level 3 Hot. Where "normal" and "high" are merely levels 1 and 2 respectively.)

Which made me want to look up the song with the same title, "Hot! Hot! Hot!" I am thinking I like the Buster Poindexter version, from 1987.

"Aye! Que rico!"

What did Buster (aka David Johansen) mean by that exclamation? I mean, besides the obvious English translation, "Aye! How rich!"

Perhaps he was thinking of how much your furnace is going to cost, if you have to buy the more expensive kinds of refractory, and temperature sensors?

Perhaps. Don't get discouraged though. Where there is "Will", there is "Way". Maybe you find this guy, Will, and he can hook you up.

Also, here might be some hints in those threads in the Science Madness forums, linked in the section titled, "References" in the article for "Tube Furnace" I linked to above.


1 year ago

2000°C is in the region that won't be easy or cheap at all.
And even if you would use acetylen and oxygen to get to the final temps the insulation will be already close to failing.
Last but not least comes the problem how your gemstones will be affected by the heating and involved by-products.


1 year ago

My intention is to heat treat gemstones for color enhancements. Since the Kilns available in the market is unaffordable at my initial stage, I am trying to find comprehensive guidance or illustrations(demonstration) with clear instructions.