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Old 03-22-2021, 02:34 AM
Tim Bassett Tim Bassett is offline
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Crucible schedule

I'm having problems searching this site at the moment.
Looking for ramp schedule for 300 lb crucible.
I remember a soak at 600c and again at 700c.
Any help appreciated.
TIA
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Old 03-22-2021, 08:02 AM
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Pete VanderLaan Pete VanderLaan is offline
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I would advise ( selling pots) 50F per hr until you reach 1000F, then hold four hours, then 25 F for four hours to 1100F, hold four hours, then 50F until it starts to glow, then turn it up.

It's conservative but I prefer the safe side.

Much also depends on burner location, or if it's electric sitting on the floor. The heat stratification in electrics is worth paying a lot of attention to.
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Old 03-22-2021, 12:28 PM
Charles Friedman Charles Friedman is offline
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Hi Tim Good to hear from you.
The best ramp schedule I have ever seen. Came from the genius Greg Englesby. "100 hours to 2000F degrees" one ramp. Pot empty or pot full. Seen it, done it, will not run anything else. Cheap insurance.

PS Give my regards to the lovely Tally.
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Last edited by Charles Friedman; 03-22-2021 at 12:32 PM.
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Old 03-22-2021, 03:10 PM
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Pete VanderLaan Pete VanderLaan is offline
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pot full... I don't know why people do that. It's really hard on the pot.
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Old 03-22-2021, 04:32 PM
Charles Friedman Charles Friedman is offline
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Sometimes shit happens and one has to startup where one lift off. Furnace crashes, pot full. Have done it a few times.
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Last edited by Charles Friedman; 03-22-2021 at 04:35 PM.
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Old 03-23-2021, 08:00 AM
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Pete VanderLaan Pete VanderLaan is offline
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I was referring to putting a new pot in a kiln and then filling it with glass cullet and turning it on. That is really hard on a pot.

If it's a salvage operation, any port in a storm.
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