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Old 01-31-2020, 09:30 AM
Dana Smith Dana Smith is offline
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Bomma - melting recommendations?

We've decided to give Bomma Cullet a whirl.

Does anyone have any recommendations for melting it in a Stadelman-style 300 lb. moly furnace?

Bomma's datasheet recommends a melting temp of between 2282 to 2336.

I know each furnace is different, just seeking advice if anyone has a similar setup.

Thanks,

Dana Smith
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Old 01-31-2020, 11:36 AM
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Pete VanderLaan Pete VanderLaan is offline
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That sounds good. Bomma is not a borax base cullet. It needs that heat.
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Old 01-31-2020, 01:24 PM
Shawn Everette Shawn Everette is offline
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I melt and use at 2100 in a wet dog natural. I've got 1.5-2 hours between charges and 12-16 hours after last charge before use. Doesn't fit everyone's schedule, but it can be done lower.
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Old 01-31-2020, 02:11 PM
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Pete VanderLaan Pete VanderLaan is offline
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Quote:
Originally Posted by Shawn Everette View Post
I melt and use at 2100 in a wet dog natural. I've got 1.5-2 hours between charges and 12-16 hours after last charge before use. Doesn't fit everyone's schedule, but it can be done lower.
****
I thought you weren't using the Bomma yet.
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Old 02-03-2020, 09:46 AM
Shawn Everette Shawn Everette is offline
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Nope I'm on it, have been since about October. Done a couple posts about it.
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Old 01-31-2020, 03:26 PM
Eric Trulson Eric Trulson is online now
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Quote:
Originally Posted by Shawn Everette View Post
I melt and use at 2100 in a wet dog natural. I've got 1.5-2 hours between charges and 12-16 hours after last charge before use. Doesn't fit everyone's schedule, but it can be done lower.
Seconding this approximate schedule in a canned heat 200# furnace. My friend's shop has been using Bomma for much of the past year. He just charges at working temp (2080F), waits about an hour and a half between charges, and leaves it overnight after the last charge. Sometimes still has a few small bubbles left the next morning, but it generally fines out before the end of the day.
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Old 01-31-2020, 05:45 PM
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I've done this sort of schedule and agree that the fining goes well, but running a good deal hotter seems to yield up a different glass when it comes to cording. Is that being considered?
It seems OK on small work but not on deep dives.
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Old 02-01-2020, 11:17 AM
Dana Smith Dana Smith is offline
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Pete,

Novice question - are you implying that you would expect more cords or less cords at the higher temps?
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Old 07-06-2020, 01:50 PM
Shawn Everette Shawn Everette is offline
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Firing this back up.

Anybody using newer runs of booma and seeing problems? We're ready for another cullet order...
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Old 07-06-2020, 02:10 PM
Art Freas Art Freas is offline
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Not sure how recent you are referring to but I have really been liking the bomma, is melting really nicely no bubbles and works nice. We got our load before the stay home order though.
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Old 07-06-2020, 02:21 PM
Shawn Everette Shawn Everette is offline
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We're still working off one of the first runs from april/may of last year, and I too have nothing but great things to say. I know Pringle and others had some seed issues, and I'm wondering if the kinks got worked out.
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