Re: using lots of water to mix clay
Hank Murrow
On Nov 5, 2009, at 1:33 PM, douglas fur wrote:
> Lee
> OK,so when I imagine "two steel plates that are set closer at the
> bottom than the top." I get the picture that they make a narrow
> "vee",
> touching at the bottom. I imagine then, that one wheel is passive
> (rotates
> freely) and the other is driven so that the material gets rolled
> between the
> plates and consequently the material transmits some of the rotation
> to the
> passive disc.
> Sounds like a nice idea but does it match reality?
Well, Duff;
Hank, not Lee here........
It certainly does. My jaw crusher and plate mill will take hardball-
sized rocks(the harder the better) down to 18_10 mesh in the jaws and
the plate section will take that down to -100 mesh. The ball mill is
used to go finer. it does take a five horse B&S motor to do the work
but it is fast...... can process feldspar at 1000#s a day.
Cheers, Hank in Eugene
Paul Herman
I don't know if any of you have ever used an impact mill, but I sure
like mine a lot. It makes a jaw crusher look like a slow moving
glacier by comparison. For crushing granodiorite, feldspar and other
medium-hard stuff it's very fast. The feed material has to be broken
down to about 1 inch and smaller. There is a four vaned paddlewheel in
a steel canister that spins at 2,000 rpm and batters the stuff down to
about 10- mesh, then blows it into the collector. Most of it is much
finer. I sift it to 16- and put that material in the pebble mill. The
impact mill is like a hammer mill, but without the swinging hammers. I
bought it for a hundred bucks (sans motor) from a guy who came in the
driveway one day because he thought I might need it.
I started out with a small electric powered jaw crusher that a friend
built for me. He's a guy who likes the challenge of this kind of
stuff. I didn't have $500 for the really good bearings, so it has worn
out bearings and is awaiting repair in my shop. I imagine they might
be $800 by now. It was a slow proposition to crush stuff in it.
I also bought one of the "mini mills" that Lee is writing about. It's
a great little hand powered jaw crusher for making samples and small
runs of a pound or two, but more than that can get tiresome. One jaw
is stationary and one moves up and down in a slight curve.
It's always nice to find material that Mother Nature has milled for us.
Good milling,
Paul Herman
Great Basin Pottery
Doyle, California US
www.greatbasinpottery.com/
Hank Murrow
On Nov 5, 2009, at 5:35 PM, Paul Herman wrote:
>
> Hank, Doug and Lee,
>
> I don't know if any of you have ever used an impact mill, but I sure
> like mine a lot. It makes a jaw crusher look like a slow moving
> glacier by comparison. For crushing granodiorite, feldspar and other
> medium-hard stuff it's very fast. The feed material has to be broken
> down to about 1 inch and smaller. There is a four vaned paddlewheel in
> a steel canister that spins at 2,000 rpm and batters the stuff down to
> about 10- mesh, then blows it into the collector. Most of it is much
> finer. I sift it to 16- and put that material in the pebble mill. The
> impact mill is like a hammer mill, but without the swinging hammers. I
> bought it for a hundred bucks (sans motor) from a guy who came in the
> driveway one day because he thought I might need it.
Yes, Paul;
I have used David Stannard's hydraulic impact mill which worked just
as you describe. The twist he brought to the mill is that it was
driven by a hydraulic pump that was driven in turn by the raised back
tire of the Datsun pickup he used to go prospecting in. just idling,
there was plenty of hydraulic power available to drive the mill. Here
is a pic:
