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Old 12-10-2018, 09:52 PM
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Franklin Sankar Franklin Sankar is offline
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Revisit Air gas mix for glory hole

Every so often I look at my glory hole and admire the most inefficient furnace .
So much heat is lost through the door. But that is another story.
I never found a way to determine the adjustments for the best air gas mixture.
I look for a blue flame and a guttural growling sound.
I remember someone talking about making the flames come outside the door.
Then after heat up dial back the gas to make the flame go back inside.
I tried it yesterday and instead of dialing back the gas I dialed back the air to make the flame come out the door.
Is it the best mixture when the flame comes out the door?
Franklin
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Old 12-11-2018, 12:38 AM
Nick Delmatto Nick Delmatto is online now
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Yes, but not too much. Observe & adjust.
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Old 12-11-2018, 08:15 AM
Eben Horton Eben Horton is offline
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You are doing it right franklin.
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Old 12-11-2018, 12:07 PM
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Franklin Sankar Franklin Sankar is offline
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Thanks . Do you have the small flames coming out of the door all the time or only at startup.
Franklin
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Old 12-11-2018, 01:47 PM
Eben Horton Eben Horton is offline
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When I start working I fine tune the hole so that the little flames just barely go away. To tune it right you use your eyes and ears. The little flames will turn silver colors silver which can be nice
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Old 12-12-2018, 05:56 AM
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Franklin Sankar Franklin Sankar is offline
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I hope it donít turn my crystal looking glass dirty looking. FHC
Franklin
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Old 12-13-2018, 07:01 PM
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Sky Campbell Sky Campbell is offline
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Fenton heavy crystal (FHC) sounds like it would have lead in it but it does not. It is a simple soda lime glass so reduction should not turn it grey.



I always felt flames licking out of the hole implies incomplete combustion. The gas is combusting outside of the glory hole. The flames are a good indicator before you dial the air up or the gas down. It does help you tune it in but any flames outside the hole aren't doing anything but heating the shop.
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Old 12-14-2018, 08:51 AM
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Excessive antimony in a clear glass will cause it to grey up on the surface in heavy reduction. Really excessive antimony makes an opaque.
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Old 12-16-2018, 09:40 PM
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Franklin Sankar Franklin Sankar is offline
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Thanks. It also seems that The excess flames also waste the gas.
Now to prevent the graying.
Franklin
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Old 12-17-2018, 08:59 PM
Jordan Kube Jordan Kube is offline
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Quote:
Originally Posted by Sky Campbell View Post
Fenton heavy crystal (FHC) sounds like it would have lead in it but it does not. It is a simple soda lime glass so reduction should not turn it grey.



I always felt flames licking out of the hole implies incomplete combustion. The gas is combusting outside of the glory hole. The flames are a good indicator before you dial the air up or the gas down. It does help you tune it in but any flames outside the hole aren't doing anything but heating the shop.
Depends on the geometry of your glory hole, etc. Depending on how hot you want the gloryhole you may not get there without a "stinger" popping out the front. Usually it's a fast short type of flame that is composed of well mixed hot gasses. It just won't all fit in there. Lazy flames are rich flames.
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Old 12-18-2018, 02:47 PM
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Franklin Sankar Franklin Sankar is offline
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Sometimes I get it very hot but sometimes it is so lazy it just relaxes at a lower temperatre. Yes the hot I want is when the flame licks out a bit . Is that a stinger? When I open up the air the flame seem to be colder and does not come out. I find the best way to get the flame to come out o is to cutback the air.
Franklin.
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