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Ribbon Burner Assistance Needed!!

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Hi all, i'm trying to get my ribbon burner up and running. i have a 1.5" coupling on the back, about 1.5" of inside plenum space about the refract, and then 21 crayon sized holes (5/16" D). My surface area math says that the inlet is equivalent to ~23 crayon holes so i figured by going down a couple of crayons, that will provide back pressure enough to keep the ribbon burning running. Is it possible to have too much backpressure? what would i see if so?


I ran the forge for awhile the other day. my flame cones looked stable, weren't too greenish or spitting yellow flames and weren't wavy blue as if there was too much air. it ran real well for awhile but right around 2100 degrees, the flame blew back into the plenum. i shut the forge down, did something else, and then fired it up again. sure enough - ran well for an hour but when it started to get up to ~2100, it blew back again.


I have no idea what the issue could be at this point. Any assistance would be well appreciated. 

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I have a similar problem,when I get around that hot it will sometimes"pop",at this point my forge is so hot that I need to lower gas and feather the air to get it to stop. I have my fan on a speed controller and it has just been like how you need to get the right ratio to get it started would be a good way to describe what I have to do.It is nerve racking fiddling with it after it pops and I would like to hear what anyone else says about this.

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  • 3 months later...

Im going to start with saying I'm not an expert on the subject but how big is the interior of your forge? It is possible to have too much back pressure as its less of an issue at low temps but becomes more pronounced and more problematic at higher temps. What is possibly happening is fuel/air is entering the burner and being dispersed to the holes slow enough it is building up in the burner. At low temps there is still enough flow to keep the flame outside and the castable cool but at higher temps the interior of the forge becomes more pressurized essentially from the hot atmo slowing the rate of flow from the burner. This causes it to heat up and either the pressure/flow isn't enough to keep the flame out or the castable heats to the flashpoint and you get back burning.

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