URBAN MINING! Recovering gold, copper, precious metals from PCB’s without chemicals


So we are very excited because we finally
have a system in place here to run these circuit boards. And I have four different bins, I
got back from the scrap yard and picked through their electronic boards & circuit boards.
And I tried to separate them into four different categories. This bin, they’re all brown
on one side and green on the other, they look like they’re older boards, some have a whole
bunch of stuff on them. I think that’s the low-grade stuff. Here’s the next separation
I did, these are green on both sides, but they don’t have a whole lot of stuff on
them. They seem to be smaller pieces, here’s an old clock maybe, or a VCR. This is the
next grade. Here’s the next grade up from that. This stuff has all kinds of solder and
wires. And there’s a chip with a little gold corner. And you can see here in the light
that’s all, I think, copper wiring, so there’s a lot of copper in that board. And this is
the highest grade stuff, and I’m not quite sure what all this came out of, but you can
see a lot of gold corners in these heat sinks, I think there’s gold as well. All these
different boards, some of you probably know exactly what these came out of but there’s
a little gold chip corner, there’s another one there on this board. Here’s some more,
there’s another gold corner. So what we’re planning on doing here, here’s our system,
here’s our hammer mill, bolted to a couple ecology blocks. A shoot down onto our shaker
table. And it’ll make 4 cuts here. This first bucket
in this green tub is the waste, the tailings, there won’t be any metal in left in that.
This bucket here in the black tub is what we call the middlings, that’s where most
of the the copper will go, and maybe the solder as well. And then out of these two ports here, this
one on the left is the highest grade, that’s where all your free gold is going to go, and
all your most very dense stuff. And this one here is called your number twos, and these
are your two safety grooves, and the material that is the heaviest but not quite heavy enough
to get into the gold hole number 1 will get into number two. And there’s the system, it’s a hammer
mill and a wet shaker table. And I’m going to start with the lowest grade stuff, what
I call the lowest grade stuff, and we’ll run all that, show it running on the table.
Step it up to the blue bin, and then go all the way up to running what I call the highest
grade stuff, and whether it’s the highest grade stuff, we’ll see. Anyway we’ll get this going here and show
you how it works on the table. So here’s a sample out of our number three
hole, or the middlings hole. And you can see there’s a bunch of copper in there but it’s
also mixed with a bunch of boards still. And for this first trial run, we didn’t have
the splitter in the right place between the middling and the tailings. So you can probably
clean that up quite a bit just by adjusting the splitter. This can be re-run on the table
again, and upgraded even further, so you can get it quite a bit cleaner than it is now. This is the gold pan out of our number 2 hole.
You can see it’s pretty much pure metal. It’s a lot of copper, a lot of solder. But
I don’t see any pieces of board or epoxy or anything like that. It’s all metal. And that gold pan there out of the number
two hole, there’s probably 20 or 25 pounds of stuff there. So it’s pretty dense stuff. And here is the stuff we panned out of the
number one hole. Here’s a close up of that gold line. It goes all the way across there. Here are the screens we use in our hammer
mill. And the one we have installed for the test we just ran is this screen right here.
It’s a half millimeter laser cut slot, ⅜ AR, 400 steel. And we got about 50 pounds
per hour, plus or minus, through, with that screen size, so we’re still in the experimental
R&D phase. We have some different size screens, this one is about a millimeter, and this is
a larger one at about two millimeters. So we’re going to play around with trying to
get the throughput up, maybe we don’t have to grind it as fine as we did, or maybe there’s
a two step grinding process, where you grind it down to 2 millimeter for the first hammer
mill, and then through a half millimeter. But we’re going to keep working on this
and we’ll keep you updated as we go. So there’s the results of our tests, and
we ran probably fifty or sixty pounds of boards, and ended up with probably close to 25 or
30 pounds of metal out of them. So there’s a lot of metal and valuables in there. Don’t forget to like, comment, and subscribe.
And if you’re interested in learning more about the equipment or the shaker table, give
us a call or email, all of which is in the description below. Thanks again!

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