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Old 01-31-2019, 11:20 AM
Fredi Vilina Fredi Vilina is offline
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Spruce pine with invested pot moly

what is the best way to melt spruce pine in the 12.5 lb bags in an electric moly with invested pots? Does anybody stir the charge like it says on SP's website? Since switching over from cullet there is a hard time keeping one furnace ahead of the other on turn around.
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Old 01-31-2019, 11:48 AM
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Pete VanderLaan Pete VanderLaan is offline
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In general, Paper bags in a moly just stay in there clogging the elements. I would tell you to empty the bags into a tray and load with that.
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Old 01-31-2019, 12:48 PM
John Riepma John Riepma is online now
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I can a tell you that the studio was a lot dustier when we charged with the 12.5# bags. My observation was that the flame coming off the bags created a lot more turbulence, flames out the door, etc and I believe that all that action caused more dust to blow around. Now we charge with a scoop out of 50# bags and the dust is noticeably less to non-existent in the studio. We do have a 1" vent hole in the door that is opened up when charging to allow gasses to escape from a passage other than the element holders.
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Old 01-31-2019, 01:04 PM
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John's answer is on the money. I noticed the same issues and switched to pouring the batch in via a long chute. I also installed a door vent when I did my last rebuild thanks to Pete's recommendation. When the paper bags burn, all kinds of dust was discharged. Now there is practically nothing observable.
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Old 01-31-2019, 02:35 PM
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Pete VanderLaan Pete VanderLaan is offline
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That all makes sense. You are creating combustion where none existed.

I used bags in the early stages of Flying colors so that we could drop a colored batch with precision into a pot but those were gas furnaces and we shut off the burner when loading. We wanted no flying batch. That was taught in the first color class and Tom took that class. Putting it in 12.5 lb bags is sort of an adaptation of the idea. I've never cared for it. I had them when I was doing the color work at Simpson's sinch josh wanted the bags. I always poured it out.
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Old 01-31-2019, 06:02 PM
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[quote=Pete VanderLaan;142677]That all makes sense. You are creating combustion where none existed.
We wanted no flying batch. QUOTE]

Just "Flying Colors", right?
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