Hi, my name is Jason with Mt. Baker Mining and Metals and today we're going to run a
sample of some Chromite that came from South Africa.
This is about 31% CR203 so its a Chrome Oxide, and this is a byproduct of a Chrome refinery
down in South Africa.
They are looking to upgrade this to mostly Chrome and get the Iron and the Silica and
the Aluminum out.
So they can have a high Chrome product that they can refine later.
We are going to run it on one of our 4' x 8' Shaker Tables behind me and we will show
you the results.
We are starting to feed the sample now and I'm going to feed it pretty slow, because
there is so much Chrome in it and the Chrome is so dense that we are going to get a whole
lot of concentrate.
We are going to run about a third of the sample or so and send the results to the customer
and that way if he wants to do something different or change things we still have some sample
left to run.
So here's the heaviest material coming off here, it's actually white, I thought the Chrome
Oxide would be black but whatever this is, it's the heaviest stuff.
Going to adjust the water bar a little bit, try and get some of this Chrome up under the
water bar.
Looks like there's actually bigger flakes and flecks coming out and this fine stuff
is coming across.
Like I say, I'm feeding this pretty slow because I don't know how it's going to react to the
table, I don't want to overwhelm the concentrates.
When we run samples it's hard to know exactly what's going to happen, so I always start
out slow and then ramp up from there, because we're working with such a limited amount of
material.
So here's the heavy material coming down under the water bar, these bigger pieces are dense
as well but their are so large and they have a big enough cross-section, the water bar
is actually pushing them down and they'll come down into the number 2 here.
The grooves have actually been overwhelmed by the material, there is so much that it
can't all come up the grooves, so it's forming another band down here, it's coming down and
it's being caught by our two safety grooves and it will come across here and there is
very little going down into the number three midlings.
I'm going to play with splitter here a little bit, so I'm going to turn this around and
now we have anything that comes down here and we will catch a little bit of the waste
and all the rest is going off into the waste now.
I fed it a little bit too fast, you can see we are getting some Chrome, I think that's
Chrome in the number 3 midlings, which is fine and we can rerun the midlings to upgrade
them or we can just do this splitter and take a little bit of waste and get all of our Chrome
here.
The key to running the Shaker Table is a nice consistent feed, even feed and even grain
and it's hard to do when I am shoveling with a little trowl and trying to adjust things.
We are going to get some ebbs and flows in the concentrates but that's okay we're doing
our sample, we're running it and everything is working out real good and as you can see
we are getting real good separation of the densest material from the black waste.
Alright, so here is the results from our Shaker Table test, here's the number 1, as you can
see it's mostly fine stuff but it is pretty much pure Chrome I believe, it's really heavy
for how much volume is in there.
Here is the number 2, again pretty much pure Chrome and you can see this is where the more
dense stuff or the larger pieces went so it's not as fine material, it's a little bit more
corse.
Here is the number 3, and like I explained earlier the number 3 when I am running samples
I like to catch some waste just so I don't lose any Chrome, but you can see there is
a lot of Chrome, it's probably more than half Chrome, the bucket weighs a lot.
Again, I had the splitter set back so if I over feed it I wouldn't lose any Chrome, when
you set the table up and your running in production it's really easy to dial in the feed and then
you can move your splitter so you are separating pretty much the stuff you want from the stuff
you don't.
When I am running samples it's hard cause I'm feeding and it's surging and I'm adjusting
things on the table so that's why there is a little bit of contamination in here, this
could easily be upgraded again, rerun back on the table, or if you wanted to get a pure
product you could run the number 3 directly on to a second table that would upgrade just
your number three but looking at how the table ran there shouldn't be anything in the number
4, the waste, it all got caught in the number 3 and like I said, I took a little bit of
waste from the number 3 just so I had a good recovery.
Thanks for watching our sample and our video, I think it went great, I think it really proved
how the Shaker Table can separate by density and the Chrome that we're separating is about
5.5 grams per cubic centimeters, so it's really not that dense compared to some of the heavier
metals, the stuff we have been working with like Gold and Copper so even though the quote-unquote
lighter material separates really nicely on our Shaker Table.
Thanks for watching!
We will see you on the next video!