I built a torch who works with natural gas and propane. Modernization is quick, simply to change nozzles. To take full advantage of "The Monster Torch" I designed and built a new furnace. 

 

 

This is a video of the work of the burner with propane.

 

http://youtu.be/0zriNb1MUJs

 

Here are the pictures you can see the steps of build and the principle of operation of the furnace.

 

               

 

Mix of natural gas and atmospheric hot air accelerates to speed of burning using the compressed hot air.

 

The first test run with natural gas.

 

The furnace is almost cold, work with a minimum power of.

 

After 40 minutes I put in  forge  the crucible and melted brass. Melted in a few minutes. The furnace is working on half power.

 

In the movie can hear as roar of the  torch with propane. Working with natural gas is quiet.

Yeah, as I watched the video I was thinking that produces enough heat to melt bronze and if produces that much heat you can forge weld with it too. Nice build, thanks for shearing with us.

Sweet!

Do  you use the propane and natural gas at the same time or is it either/or?  If you use both, what is the advantage of that?  Very nice build.

The burners are working well on the low pressure of gas. If I need a normal temperature for forging and welding, I have natural gas connected. If I need a really high temperature, connect the propane. I must, of course, replace the nozzle on the appropriate for used of gas. 

 

I mean to get to the highest temperature, with the least amount of gas.  The advantage is a very low cost of operation and versatility this forge. 

 

Now it is connected to propane and  furnace already rages  at a pressure of 0.7 bar.

 

    

 

For normal operation, sufficient pressure 0.05 bar propane. 

 

I have two old burners and comparing the work of all three I consider the venturi type or other atmospheric are good for nothing or just for hobbyists who do not care about production costs.

 

 

Larger burner has also hot compressed air nozzles.

 

If I have not explained it well, I'm sorry, I speak English imperfectly.

The Pole is able. Congratulations Tom :)

Interesting design, indeed. :) Looks very professional.

I'm afraid I'm one of those "hobbyists" who do not care for production costs... hence doing a forge like this seems not to be worth the savings of gas... For now I stay with my small FreonTank mini-forge built after Ron Reil's design. It is fairly small though so I think I will eventually have to build something bigger and your diesign looks very promissing. ^_^

 

Thanks for sharing Tom!

I join in the thanks, Tom, and shall likely develop one like this.

Tom do you have anything written down on exactly how to build one of those burners? I would really like to build one. I like the idea of using as little fuel as possible, and that seems to be a perfect design. Great looking forge by the way. And thanks for sharing that with us.

 Subtitles Polish, google translator helps. The seventh post on this site. ;) http://forumkowalskie.pl/viewtopic.php?t=76&postdays=0&postorder=asc&start=180

I'll try to explain the advantages of natural gas over propane Besides, Because it is always in the tube. Natural gas has a lower temperature to the truth than propane flame, but at a temperature of 1000 degrees C undergoes dehydration phenomenon. Decomposes into acetylene and hydrogen. What is the impact on the increase in temperature probably does not have to explain to anyone. If at the same time take care of recuperation that is heating the air supplied to the burner, the energy gain is undeniable.I hope it is understandable what I wrote. Gonna use the google translator ;)

Thank you banan

Hello, i'm sorry but can you upgrade the photo ?

Thanks a lot !

Photo update would be excellent!