Hey Guys, my name is Jason with Mt.
Baker Mining and Metals, and today we are going to run this metallic slag sample that
one of our customers brought us.
This is a pretty cool sample, I'm excited to run it.
Currently, it's a 3/8ths minus.
He wants to get it crushed down to about 40-70 mesh.
We are going to run it through one of our 16" x 12" Hammer Mills it's got a 1.2 millimeter
screen in it, and we're going to screen the discharge at the end to show the size ranges
we get, and hopefully we can get the most volume in the 40-70 mesh size range.
So we'll run it, show you the results and see how it goes.
(machine noise) Okay, so here's the results from our Hammer Mill test.
It ran pretty good, it ran a lot faster then I would have thought, but here's the results.
We are going to take out, I don't know 2 or 3 cups and screen it for the customer.
And we'll weight it and send him results that way, and we will take the other part of the
sample and package it up as is and send it back and he can do his own screen analysis.
So, yeah I think it went great and we'll screen it here and see what we've got.
Alright, so we took some sample that we crushed, this is two kilograms, and I'm going to screen
it through these three screens.
I don't have the exact sizes he wants but we are going to do a 30, a 50, and a 100,
and we'll take the various fractions and we'll weigh them and see what percentage we got
for each size.
Alright so here's our screened samples, we screened them into 4 different fractions.
The first one here is our 30 mesh plus, and there is about a kilogram of that.
This next one is 30-50 mesh and there was 400 grams of that one.
This is 50-100, 325 grams of that.
And then this one is our 100 mesh and smaller, and there was 275 grams of that fraction.
So this screen may have been a little bit too coarse, we've got most that was 30 mesh
and larger which was too big for the customer's needs, but there's a couple different strategies
we can use for sizing screens and it will really depend on, the finer size if that's
still useable or not, if you want to absolutely minimize the fines, I'd suggest going with
a larger screen, screening the discharge and then running the oversize back in with the
raw feed so you're not grinding any finer then you absolutely have to.
If there's a product that you can use the very fine stuff for then it's okay to run
a little bit smaller screen, sacrifice a little bit fines, if you still have a use for them.
So that's kind of the strategy that we can use with some of our customers on what they
want to do with screen sizing when they are trying to get a bracketed mesh size range
of the product.
But here's the test with a 1.2 millimeter screen, we can run another test with a .8
millimeter screen if they want to go for a little bit finer size range if that gives
them an idea of kind of where it runs, with that size screen.
So I'm gonna send this all back to the customer so he can do his own analysis and if you guys
out there have any samples you want to send us.
We would be more than happy to run them through some of our demo equipment here and send you
the results.
So thanks for watching our video and we will see you on the next one.