forced air buner adjustment

Thanks Fred, I escaped with some singed nose hairs. Stacy I must say I was tempted to do the same but everyone recommended against it. Next time I have to do this I think I will build a 1 brick to play with while its curing. I have been going as slow as I can manage. If I had more than one forge it would be a lot easier to wait. :P As it is I am looking at about a week total time since installing the wool. I think I will add one more layer of satanite just to fill a few cracks and smooth everything out a little more. Give that 2 days to dry, second day in front of the heater vent. Then do the whole ramp up burner thing again. Then I have to do the ITC-100. I know patience pays off but man anticipation is killing me. I keep reminding myself I will probably screw up my first few forged knives anyways so whats the rush.
 
How much less gas does a blown forge use as opposed to non blown? Is it measurable? Will it save trips to get propane or does it just get hotter faster?
 
Beile said:
How much less gas does a blown forge use as opposed to non blown? Is it measurable? Will it save trips to get propane or does it just get hotter faster?
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There is a great deal more control with a blown forge.
The Gas/air mixture is broader and can be changed quickly. You can run a wider range of atmospheres in a blown forge.

You can operate at lower set temperatures with a blown forge.

Blown forges are more efficient with the gas used.

They are more fun to build with results that are worth the bit extra that it takes to make them.
They sound better.:eek::D:thumbup:

You can probably tell I am biased.:D
Here are two blown forges I built this year. Vulcan's Chariot is used for forging and welding, the other is for heat treating. It has a closed chamber that has argon injection.

twoforge+003.jpg


As far as Air goes it can be added in different ways as long as its in the right amount.

These two forges run with different air requirements.
The one on the left is open on both ends and is blown. The other, with the muffle is only open at the exhaust on top, it gets all of its air from the blower, other wise it is closed completely except for the ignition hole you see sticking out along the front.
This was a vertical forge two months ago.
It starts a little slower than the Chariot but once past 400f it smooths out and gets down to business.

They both hold set temperature within 2 degrees.:)

Fred
 
Also, note Fred's nice control panel for the two stage forge controller. Super accurate temperature control there.
Stacy
 
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