Today we’re going to be running some high grade gold ore that a customer sent up. We
have about 300 pounds there, and we’re going to run it through our turn-key system, with
hopper to jaw crusher, discharge conveyor into the hopper, and another conveyor into
the hammer mill, and then on to our 4 by 8 shaker table.
[Crusher noises]
Almost all the gold ends up coming out of the top three grooves there, there’s a little
spilling over into the next couple grooves. And that will end up coming out this groove
right here.
Now we’ve stopped everything so that we can see the gold and the separation with the
other lower specific gravity materials. We’ve got some real silvery material in there, we’re
not sure what that is. The grey stuff is probably pyrotite, and most of the gold comes out of
the top groove, from across the table. And it just makes a nice line of gold under the
water bars and into the trough. Number one, and number two, high grade coarse.
Now when we’re done running a couple two to three hundred pounds, we have to brush
down the table, because the gold hangs in the grooves and we’d be here all afternoon
to get it. So we brush it down, and this is really where we get our strong line of gold.
A good part of this is smoke on the table. The big pieces have come down already, they’re
down here. These are the bigger pieces from the ore, and then 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 deal of this will go
through a 325-mesh screen.
We’re taking the gold we recovered off the table and we’re going to screen it into
3 different size fractions. This is the 100-mesh screen, it’s a little bit hard to see with
the glare, but there’s the gold on top of the 100-mesh screen, and there’s the gold
that went through the 100-mesh screen.
Now this is all the material that went through the 325-mesh screen, and we’ve got it panned
out pretty well, but you can see how fine it is. So there’s that 325-minus. Now we’re
taking this 325-mesh video through a little loup, and it’s maybe 8 or 10-power, and
you can just see the edge of it there a little bit.
Here are the results of our screen test. On the left is our 100-mesh plus, next to that
is 100 to 200, then 200 to 325, and on the far right is our 325-minus. So you can see
the variation of gold size the table captures, and there’s a little bit more than an ounce
of gold here, so the table did a great job.