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Easy DIY Gold & Silver Refining Process At Home, No Acids. Remove Base Metals By Cupelling MBMM - YouTube
Channel: mbmmllc
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Hey guys, my name is Jason with Mount
Baker Mining and Metals and today we're
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gonna take this little bead of gold from
one of our previous smelting experiments
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and we're gonna try and remove the base
metals by cupelling it using lead and
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Portland cement. Okay now the first thing
we're gonna do is we're gonna make our
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cupel out of this Portland cement,
and I'm gonna put it in this stainless
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steel mixing bowl here so it can hold
its shape. And the cupel absorbs the lead
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oxide that is formed on the lead button
as we heat it. And as the lead oxide
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forms and becomes liquid, it rolls off
the lead bead and gets absorbed into the
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Portland cement here and taking with it
other base metals. And the gold and the
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silver will stay in the gold
button once all the lead is gone and
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absorbed into the cupel here. Okay now
we're gonna take our little gold bead
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here, we're gonna weigh it on our scale,
it being four point eight one grams. All
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right here's a little thin ingot I made,
I melted down some roofers lead which is
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nice pure led it's very soft, I mean see
I can bend this ingot pretty easy. So I'm
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going to just clip off some lead here
off the corner. Again we're shooting for,
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I don't know, probably between 100 to 150
grams.
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So there's 63, so maybe twice that much.
So we're gonna have a pretty big lead
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button here. There's 63 and there's 64, so
we have about 127 grams a lead here and
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we'll use that absorb our gold bead. I'm
gonna cut these pieces of lead a little
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bit smaller. Now we're gonna take our
gold bead and place it in the center of
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our cupel cover it up with our our
lead. There we go, and now I'll go get a
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torch and we'll melt that down. So here's
our cupel, the lead is just start to
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melt and that's a propane burner from
our furnace videos for our smelting
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experiments. And as this thing gets up to
temperature, I wrap the kaolwool around it
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just heat in, but that lets going to
start melting down black scum will form
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on top which is lead oxide and as it gets
up to temperature that lead oxide will
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start to slough off in the cupel.
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Now the temperature's coming up, the lead has
starting to open up and there's, it looks
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like it's now it's molten on the surface,
and that's going to allow the lead to
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oxidize.
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Now the lead is completely opened up, and
you can see there's a little black ring
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of lead oxide that sucked into the cupel right around that liquid pool of
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lead. And as the reaction continues the
lead pool will get smaller and smaller.
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So now our lead has reduced in size
quite a bit, the lead oxide ring around
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it is grown and as this works down the
puddle is going to get smaller and
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smaller until it turns into a little
gold button. All right so we just turned off
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the burner there, and our little gold
bead is sitting at the bottom. And it
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kind of went I think the term is kind of
like a rainbow of colors on the surface
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there and that it blinked over to
gold colors. So I'm gonna pull it out of
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there and then we'll cool it down and
get it weighed, take a look at it. So there it
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is, it's quite a bit shinier than it was.
Well I think we pulled out quite a bit
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of base metals there. And it's just real
shiny shiny gold now, so that's pretty
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cool. There's our little gold bead, ends
up at 4.3 grams so we lost about half a
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gram of base metals. Now we're going to
cupel this other gold bead, this is from
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a video I did a couple years ago where
we took some ore and ran through the
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turnkey system. And I've got some
comments in the video about the button
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doesn't look very pure, it looks like it
has a bunch of copper in it. So we're
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gonna cupel this one, right now it
weighs 15.9 1 grams, and we'll put it in
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our little setup here and see if we can
get that reduced and and looking shiny
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and gold. So we've just put our lead bead
in there and the molten lead as it gets
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hotter is going to absorb that gold bead
and then start driving the oxides off
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the surface of the puddle. All right now
the lead's completely absorbed that gold
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bead, and it's really hard to focus but
the lead oxide is floating from the left
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to the right on top of the puddle and
being absorbed into our cupel.
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And here our bead is getting pretty
small and you can see the oxides forming
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on the left-hand side of the button and
they're actually making a little puddle
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of oxides on the button on the
right-hand side. But as this reaction
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continues, the oxides will all be
absorbed with cupel and we'll get a
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nice gold button at the end. Now the
button has blinked over to gold and all
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the oxides have been driven off so now
I'll cool it down and get it weighed. Got
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that button cooled down, it's that nice
gold color that we're looking for. Let's
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see how much it weighs... 13.62, not bad. So we lost, what, at a
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couple grams of base metals. And
then here's that another one that we did
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earlier. Ended up with just shy 18 grams
of gold. It's not bad for a day of cupelling.
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And I think you know we we pretty
much removed all the base metals, refined
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our gold a little bit and now I can send
it off and get paid. So I hope you guys
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enjoyed the video thanks for watching
and we'll see how the next one.
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