Author Topic: Small furnace build  (Read 7740 times)

Offline ironman

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Small furnace build
« on: November 02, 2012, 01:38:19 AM »
Hi everyone

                    I made a video about a small furnace build that melts cast iron using propane. This furnace may be useful for some one wanting to melt small amounts for models etc. The ceramic came from off cuts from larger furnace builds and the paint came from Cast metal services in Australia, it is called "Zircoat W" 25 kg pack. Click onto the link to see the video 
  furnace     

Offline trevoratxtal

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Re: Small furnace build
« Reply #1 on: November 02, 2012, 03:44:50 AM »
I have watched the video, and I am well impressed with your filming and design.
Many thanks, I think This is a way to go.
Trev    :nrocks: :nrocks:

Offline RotarySMP

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Re: Small furnace build
« Reply #2 on: November 02, 2012, 09:14:46 AM »
Nice video. Nice casting.

My 20l oil drum A5 furnace is similar, just with Anon's hot face over the Kaowool.

How long did it take to get the iron to melt, and how long did you keep super -heating before pouring?
Best regards, Meilleures salutations, Mit freundlichen Grüßen, Cu salutari
Mark
https://www.youtube.com/c/RotarySMP

Offline Fredbare

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Re: Small furnace build
« Reply #3 on: November 02, 2012, 07:05:25 PM »
Just the size I was thinking of. Thanks for sharing.

John

Offline ironman

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Re: Small furnace build
« Reply #4 on: November 03, 2012, 04:18:58 AM »
Iron starts to melt in five minutes and after the last iron is added I give it ten minutes to make sure the iron is hot enough to pour.

Offline RotarySMP

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Re: Small furnace build
« Reply #5 on: November 03, 2012, 06:59:43 AM »
Wow, that is excellent insulation.

Mine also has 2" of Kaowool, but with the A5 crucible took nearly an hour before the iron melted. I scaled the burner down from 3/4" to 1/2" as I couldn't find 3/4 pipe fittings here. Doesn't really matter with Aluminium as a I can melt an A5 crucible from cold in about 15 minutes, but was probably not ideal for the times I want to melt Iron.
Best regards, Meilleures salutations, Mit freundlichen Grüßen, Cu salutari
Mark
https://www.youtube.com/c/RotarySMP

Offline ironman

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Re: Small furnace build
« Reply #6 on: November 05, 2012, 12:32:36 AM »
Is your burner only 1/2" dia? Mine is about 1 3/8" dia.

Offline RotarySMP

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Re: Small furnace build
« Reply #7 on: November 06, 2012, 12:43:22 PM »
Yep
Best regards, Meilleures salutations, Mit freundlichen Grüßen, Cu salutari
Mark
https://www.youtube.com/c/RotarySMP

Offline RotarySMP

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Re: Small furnace build
« Reply #8 on: November 06, 2012, 12:44:19 PM »
Yep. 1/2". Now I can see how it takes me an hour to melt an A5 pot of iron, and you can do it in a few minutes.
Best regards, Meilleures salutations, Mit freundlichen Grüßen, Cu salutari
Mark
https://www.youtube.com/c/RotarySMP

Offline pepethefat

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Re: Small furnace build
« Reply #9 on: November 19, 2012, 01:54:09 AM »
nice.

for the uninformed...what hole is for propane and what hole is for air?  pressurized air?

Offline ironman

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Re: Small furnace build
« Reply #10 on: December 27, 2012, 11:49:07 PM »
Pepethefat

                 The large hole is for blower air and the small hole is for propane