February 14, 2016, 04:37 AM | #1 |
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Lead glows?
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February 14, 2016, 05:54 AM | #2 |
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Wow. I've never noticed that before.
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February 14, 2016, 06:14 AM | #3 |
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You aren't using those Iso cores are you.....
I cannot say I have ever seen that before myself, it always looks nice and shiny on top, never dull and red. Might have to try looking at mine with the lights off and see if it glows too....
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February 14, 2016, 06:18 AM | #4 |
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It only happens when I first start it up. Once a few pucks get converted into projectiles it no longer glows. Maybe the pot's thermo sensor is acting weird.
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February 14, 2016, 08:25 AM | #5 |
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Time for a new....
http://www.ebay.com/itm/Lee-90093-11...kAAOSwo6lWIQ1O
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February 14, 2016, 10:39 AM | #6 |
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Time for a new one of these, perchance ?
http://leeprecision.com/thermostat-110v.html ...and are you running a thermometer in the lead itself? |
February 14, 2016, 12:31 PM | #7 |
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You could have an impurity / something else in there that glows when heated.
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February 14, 2016, 12:56 PM | #8 |
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You have gotten the lead really HOT.
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February 14, 2016, 10:17 PM | #9 |
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you haven't been using lead that was used as shielding in an atomic reactor have you? ( just joking) Hot enough to glow would be hot enough to generate lots of poisonous fumes. Did you turn out the lights to see it glow?
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February 14, 2016, 10:48 PM | #10 |
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According to "Metallurgy of Lead" by Heinrich Oscar Hofman...
With certain contaminants in the right proportions, such as some lead oxides, sulfur, silicon, calcium, and a few others, lead can glow between approximately 783 F and 880 F (depending upon contaminants and concentration). Below and above those approximate values, the lead is changing phases and will not glow. So, I'd say your pot is getting a little too hot.
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February 15, 2016, 04:34 AM | #11 |
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Before I got my PID, I have seen my pot glow like that before, at around 850°±
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February 15, 2016, 06:07 AM | #12 |
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Yep just a bit to much heat. I crank up my old Lee bottom pour that hot when I am smelting range lead to get all the impurities out so when I use my newer Lee bottom pour I have clean melt with no junk.
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February 17, 2016, 03:54 AM | #13 |
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Thanks, I'll just turn it to '2' when starting up. I bought it used about 8 years ago, so no telling how old it is.
I did turn off one of the lights, and the phone camera got a decent picture of the glow with only one light on. |
February 17, 2016, 05:11 AM | #14 |
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I'm far from a safety Nazi, but in the interest of useability, a replacement thermostat is only 8 bucks. If yours ain't opening at "4", it prolly ain't gonna open at "2" either.
If you are interested, here's a link: https://fsreloading.com/parts.php?product=90009 Meanwhile, just don't stick your head over your pot. Good luck! Chuck.
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February 18, 2016, 11:36 AM | #15 |
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Years ago, I had a friend that used lead from shipping containers of nuclear medicine to pour a keel for a sailboat. He joked it would glow on moonless nights.
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February 18, 2016, 11:46 AM | #16 |
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Nope, the lead would probably purify pretty nicely, but your slack might contain some serious contamination.
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February 18, 2016, 01:41 PM | #17 | |
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Quote:
The materials transported inside of them have half-lives short enough that scrap yards and waste contractors only have to hold them for 30 days before they can be sold to the public. By that time, even the isotopes with the longest half-lives will have decayed to levels below that of natural environmental radiation. It's great alloy. ...But getting impossible to find.
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