[TheForge] Foundry heat source

[James Binnion]

Absolutely right Steve, it dosent matter how hot the flame if you  
cant keep the heat in,on, and around the work.

Jim

On Feb 11, 2007, at 5:36 AM, Steve Smith wrote:

> This is certainly a good point Jim. There are two major reasons why  
> gas forges don't run at 3600F:
> 1. Burner mixture (as Jim brings up) and mixing
> 2. Heat loss (poor insulation, heat goes up the chimney, etc.)
> The flame temp in most gas forges is way above 2400, but 2400 is a  
> good result if fairly uniform outside the flame.
>
> Not arguing with you Jim, but I thought that heat loss deserved an  
> honorable mention.
>
> Steve
>
>
> James Binnion wrote:
>> How you burn it can make a huge difference in flame temperature.  
>> The  adiabatic flame temperature of propane and air combustion is  
>> 3,622 F  with both gasses at 77 degrees F and one atmosphere input  
>> pressure  one atmosphere output pressure. Assuming a  
>> stoichiometric gas mixture  and no excess air.   Typical gas  
>> forges struggle to get to 2400 F  more than 1000 F lower in  
>> temperature!
>> The only way to get the max temperature is with laborotory type   
>> precision, hard to do in the real world but gives you and idea of  
>> how  inefficient typical burners are.
>> Jim
>> On Feb 10, 2007, at 2:33 PM, Craig Schaefer wrote:
>>> Seems to me that no matter which burner you use, propane will  
>>> still  burn at the same temperature.  It's all a question of how  
>>> you're  going to corral that heat and concentrate it, and how  
>>> MUCH propane  you're going to burn. The HF burners get damn hot  
>>> and will easily  power a forge or furnace designed to use them.
>>>
>>> CraigS
>>> Gresham, OR
>> James Binnion
>> jbin at well.com
>> _______________________________________________
>> Manage membership or unsubscribe at:
>> http://mailman.qth.net/mailman/listinfo/theforge
>> theforge mail list group photo site is
>> http://www.photoaccess.com
>> Login:  blacksmithblacksmith at hotmail.com
>> password:  anvil
>> ___________
> _______________________________________________
> Manage membership or unsubscribe at:
> http://mailman.qth.net/mailman/listinfo/theforge
> theforge mail list group photo site is
> http://www.photoaccess.com
> Login:  blacksmithblacksmith at hotmail.com
> password:  anvil
> ___________
>
>

James Binnion
jbin at well.com