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Burncoalincali

Resume air flow BOOM!!

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Has anyone had their blowers blow up when turning the air back on. 

I don’t like to have my forge roaring if I’m not in front of it. If I’m going to be at the anvil for awhile I’ll turn off my air flow until I need to reheat my work. 

But when I turn my air back on it’s like a gunshot bang. 

This has happened with a fuigo and electric blowers. 

 

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Welcome to IFI, I suggest reading this to get the best out of the forum. READ THIS FIRST

It is a common thing to have coal fumes back up in to the tuyere & piping when the blower is turned off. Then the gas ignites (called a backfire) when turned back on. A picture or two would help in figuring out a fix for you.

 

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Welcome aboard, glad to have you. If you'll put your general location in the header you might be surprised how many members live within visiting distance. I don't recognize the term "fuigo" do you mean Fuego?

Coal forges can pop but there are things you can do to limit or even prevent it.It's a build up of flammable gas that's heavier than air so it settles in the tuyere or blower. Shen you start the air again it has oxygen and because there are almost always smoldering coals in there too it ignites. 

I made my bottom blast tuyere from truck exhaust tubing, about 6"-8" of 3" dia. for the vertical. I put a 14 ga. flange at the top end to screw to the forge pan. The air supply is 2" dia. exhaust pipe welded horizontally about 2" below the forge pan. The extra length below the supply makes room for ash and flammable gasses to collect. The bottom of the vertical is closed by an exhaust flap cap as seen on Semis. Aim the counter weight towards where you stand so you can reach under the forge and flip the ash gate open to dump. However, when you get a back fire it just opens the ash gate and dumps it for you. I keep a bucket with a few inches of water under the ash gate.

The other trick is to put your blower, bellows, whatever ABOVE the level of the fire pot. The byproduct gasses are heavier than air and won't climb a hill to get your air mover. Hmmmm?

Frosty The Lucky.

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