Hey guys this is Jason with Mount Baker Mining and Metals and today we're gonna do a
video showcasing our shaker table specifically for gold recovery. And so
I've taken some clips from our past videos, I wanted to show you guys how the
shaker table worked and show some different applications for it as well as
we'll get some views of some pretty nice gold lines here. The high-grade material
and the gold is going to come across these grooves and make a line down under
the water bar here into the number one high-grade and number two high grade.
Your sulfides and concentrates are going to come down form a band at the
tips of these grooves, come down into the number three port or the middlings.
And quartz and waste material are going to come down into the tailing port.
Now this is a great shot of our shaker table showing the separation of the
quartz and the denser sulfides right at the bottom of that ramp that we filled
into the shaker table. So you can see this really nice clear line where the
quartz stops at the bottom of that ramp and is almost all flowing down in the
tailings. The distributor trough is tuned so that the ports are evenly feeding
across the entire shaker table surface. There is a nice even flow over the
grooves, there's no rivers or rapids on the
shaker tabletop, and it's all a fairly even drip across this drip lip going
into the number-four tailings trough. You really don't want to have any rapids or
areas on the on the shaker table that have higher flow than other areas.
Now you're starting to see a little gold line form on the shaker table and it
forms right underneath that water bar on the cleaning plane and as we pan up the
shaker table now you can see the first long groove that captures almost all the
gold as well as the sulfides and brings it out on to the cleaning plane where
the water bar washes the sulfides back down into the number two and number
three port. And as we work our way down the shaker table you can see that gold
line become much more apparent and work its way right down into the
number 1 trough right here. And then the two safety grooves coming across the
table into the number two port, both those are high grade ports. As we work our
way around the edge of the shaker table here you can see the number three
middlings port, that's where your primary amount of your sulfides is going to go. You
can see you have the splitter tuned to where you're capturing a little bit of
quartz but most of the quartz is going into the number 4.
It just makes a real nice line of gold right down under the water bars and into
the trough. Number one, number two high grade ports.
These are the bigger pieces from the ore. And then on up here this is
actually fairly coarse here as well. And then we get up here and this is just
very very fine smoke. Call it micron gold, call it flour gold. When we screen this a
good part of this to go through the 325 mesh screen. Okay here's the number one
bucket that we got off the table, I panned it down a little bit. But you can
see in the sun it's a pretty good showing there a lot of fine gold. We're
gonna take the number two and rerun it, we probably got about two or three
gallons at number two that we're gonna rerun on the shaker table and upgrade it
even more and then we'll pan that down and see what that looks like. Okay so
what we're doing now is we're taking our number two and we're rerunning it on our
shaker table to clean it up. And so there's a lot of sulfides in here with a
little bit of gold and we want to get rid of most of the sulfides so we don't
have to deal with them and so we're running them on the same table that we
used for our production run, but we're using the table now as a finishing table
to clean up our gold and eliminate a lot of our sulphide concentrates. So I'm
feeding our our number two right down here at the base of the ramp going down
about halfway down the table and it's forming a nice wide band of sulfides
that are running down. And we've adjusted the splitter and the trough there to
capture all the sulfides and run them back into our number-3 middlings trough
so we're not losing any of this to tailings, this is all worth saving. But
our strategy is to get as much of the free gold out as possible that you can
then smelt and sell directly to a refiner rather than
boxing up or putting a bunch of sulfides in a barrel and sending them off for
further processing. You want to get as much free gold out as you possibly can.
Okay here's our very very very fine gold that we ended up with our, this is the
number two concentrates from our initial run that we've rerun on the table and
this is what came out in the number one port. So you can see there it's
actually not very much gold but it's very very very fine it makes a really
nice looking crescent in the pan. It's easily 325 mesh minus almost all that gold
is. Now the shaker table it can also be used for upgrading concentrates from
placer operations, and so we'll walk through a couple different samples here
showing the shaker table being used to upgrade placer concentrates from Alaska
and Yukon.
Since Bella brought down 30 pounds of material,
we're running it across shaker table. And it's a really very very fine gold in here but
some of itself probably, gee wiz, even as big as 12 mesh, 16 mesh, flakes that
the miners missed and then there's a lot of really very very fine gold as well. Most gravity
recovery devices will not catch. And there you can see how fine some of that fine
gold is, right next to a dime there.
What do you think the red is? That's the garnet. That, I mean, this is amazing how that
separates that because like, it's like it's the same way that gold on your
pan. When you're panning it's really hard to get out yeah, yeah. This stuff is
coming in here I see it's fine garnet, will any gold be in that too?
Well there's a little flake, there's a little flake right there, no we're gonna
watch we're gonna watch that and see if it comes comes out and ends up getting
across here. There's two grooves at the bottom of the table here we call them
the safety grooves. Here comes that flake...
Yeah right there. So anything that that keeps down here with the garnet
will end up coming across here in that and the safety grooves, so it should
never get down into the number three, no free gold should ever get down into the
number three. Oh good, really good showing. I'm gonna do this, I'm gonna unplug the table but leave the water on.
But now it's not shakin so we can really see what's
going on here. So all your gold is coming out this
first groove. As soon as it gets off this little sandbar or a black sand, it's
caught in the groove it's gonna come down this way. There's some other really
heavy stuff, the black sand, that might be where your PGMs are. It's coming down
with the gold, but by the time it gets down here it's pretty much all clean
gold. A little bit of black sand is gonna carry its way down into the number two.
So here's this gold that we recovered from the shaker table. And this was in
addition to all the gold that he's already been able to recover by panning,
so this is the gold that he actually couldn't recover by panning and we
recovered it on our 4 by 8 shaker table. So it's actually a really good
showing out of a gallon of stuff that's quite a bit of gold recovered. So now I
have actually several clips from past customers that I wanted to show you guys
showing our shaker table working at mine sites around the world. This first one is
in the US in Utah and this guy's running his material through a ball mill
and then onto our shaker table.
It smooths out nice and evenly and we're getting (inaudible) down in the tailings trough
when we loaded up with pyrites we get pyrites coming down
into the trough down at the end of the grooves
we've got a gold line here under the water bar now there's quite a bit of
Steel coming off the ball mill that they're going to capture
before it gets off the table and so what we find that and
but there's no steel and there's pyrites the Pyrites really do a nice job coming
down into the safety grooves here into the number 2 hole
and really pretty darn nice clean gold into the number 1 high grade
these fellas feel that right now we're running between one ton and one and a quarter tons
per hour of slurry they've got it screened to either minus 20 or minus 30 depending
on what the screen is of the tromel at the output of the ball
it's really nicely grated classified material coming onto the table yeah
this gold line over here is out of about one third ounce per ton
of material so that's the material they're running is one third of an ounce per ton
okay we've stopped the table here's out gold line right under the water bar see that
silvery materials actually steel out of the ball mill
the Gold Line falls all the way up to the top groove, most of the gold comes out the top groove
there is some that comes out of the second long groove
and with the magnetic steel out it ends up being a nice clean
line of gold right there
Now, here's the gold line with the fine pyrite material and we've just got the magnet across to get the steel off
it's really pretty clean, it's clean of steel now, there's very little pyrite, the pyrite's coming down
out of the end of the four long grooves and down into our safety grooves now
So that the material going off into the high grade is pretty darn clean
now here's rerunning the number one high grade gold to clean it up
We've still got some steel in there
But it is really clean (inaudible)
We got quite a nice line of gold there!
here's another operation in Egypt in Northeast Africa and these guys are
running hard rock ore through a hammer mill and then down onto a shaker table
and you can see at the top three grooves there the gold collects and then it runs
out that first long groove and forms a gold line right down under the water bar
on the cleaning plane working its way right down into the number one
high-grade port
this is one of our shaker tables in Kenya and it's being operated at a hard
rock mine and they've run hundreds and hundreds of tons of material through the
shaker table and so I wanted to give you a shot here showing them in operation
and here in a minute we'll take a look at the gold line that they get on the
shaker table and also the free gold that they recover in their number one
port
and these last couple shots are from one of our shaker tables in Beretania I
think I'm pronouncing that right this is being run also with hard rock ore and you
can see that most of the gold comes out right in the first three grooves as it
works its way down to the fourth groove and up across the ramp on the cleaning
plane and so the miners really really like to see that gold as soon as
possible and the first three grooves allows them to see their gold as it
works its way up the shaker table so they can see in real time the amount of
gold they're getting and and they can watch where it goes as it works its way
down the shaker table
thanks for watching our video on our shaker tables and hope you guys learned
a little bit more about the applications and the wide range of uses for our
shaker tables both in hard rock and in placer operations and if you have
any questions or comments about what you saw in the video today please let us
know you can find our info in the description below so thanks for watching
and we'll see on the next video