MadModder

The Shop => Metal Stuff => Topic started by: ironman on November 02, 2012, 01:38:19 AM

Title: Small furnace build
Post by: ironman 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     

Title: Re: Small furnace build
Post by: trevoratxtal 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:

Title: Re: Small furnace build
Post by: RotarySMP 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?

Title: Re: Small furnace build
Post by: Fredbare on November 02, 2012, 07:05:25 PM

Just the size I was thinking of. Thanks for sharing.

John

Title: Re: Small furnace build
Post by: ironman 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.

Title: Re: Small furnace build
Post by: RotarySMP 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.

Title: Re: Small furnace build
Post by: ironman on November 05, 2012, 12:32:36 AM

Is your burner only 1/2" dia? Mine is about 1 3/8" dia.

Title: Re: Small furnace build
Post by: RotarySMP on November 06, 2012, 12:43:22 PM

Yep

Title: Re: Small furnace build
Post by: RotarySMP 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.

Title: Re: Small furnace build
Post by: pepethefat 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?

Title: Re: Small furnace build
Post by: ironman on December 27, 2012, 11:49:07 PM

Pepethefat

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