annapoorna sitaram on sun 16 jul 06
hello clayarters
here is a question to those who know about ball mills etc.
i have a friend who is going to make a ball mill.but he mentioned that an
attrition machine will get the job of milling the glazes in one fourth the
time
.it that a fact?
i was wondering if i should go for it or stick to the good ole ball mill
As i know very little about both the machines i would be very grateful for
some expert advice
thanking you in advance.
annapoorna sitaram
bangalore
india
Taylor Hendrix on sun 16 jul 06
Ball mills or jar mills are less complex than attrition mills. Small
ball mills are simplicity itself to maintain and use. I am guessing
that the attrition mill requires moderate to complex maintanence. In
addition, the quantity of your glaze batches will be an important
factor in deciding on either machine.
I only know ball mills and that not very well, FWIW.
Don't let the bastards wear you down,
Taylor, in Rockport TX
On 7/16/06, annapoorna sitaram wrote:
> hello clayarters
> here is a question to those who know about ball mills etc.
> i have a friend who is going to make a ball mill.but he mentioned that an
> attrition machine will get the job of milling the glazes in one fourth the
> time
> .it that a fact?
> i was wondering if i should go for it or stick to the good ole ball mill
> As i know very little about both the machines i would be very grateful for
> some expert advice
> thanking you in advance.
> annapoorna sitaram
> bangalore
> india
Dave Finkelnburg on sun 16 jul 06
Annapoorna,
You are correct...an attrition mill will be
faster than a ball mill. However, the ball mill is
easier to make, cheaper to run as Taylor mentions, and
is time really an issue for you?
Most glaze ball milling is just to disperse the
particles so they are truly mixed. A polyethylene jar
works best for this because the particles are mixed
without being ground. The balls give against the
plastic and grinding just doesn't take place.
An hour of ball milling in a plastic jar is
usually sufficient to disperse any glaze.
An attrition mill, by the way, is a vertical ball
mill with a shaft down the center and stirring arms
sticking out from the shaft. The shaft turns, but the
jar stays put. As the balls are stirred they fall on
the contents and grind whatever is between the balls.
Hope this helps. Good potting!
Dave Finkelnburg
--- annapoorna sitaram wrote:
> i have a friend who is going to make a ball mill.but
> he mentioned that an
> attrition machine will get the job of milling the
> glazes in one fourth the
> time
> .it that a fact?
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Ivor and Olive Lewis on tue 18 jul 06
Dear Annapoorna Sitaram,
If by Attritor you mean something like a flour mill where the material =
passes between a moving plate and a stationary plate then I may be able =
to give some sort of answer.
Some years ago I had access to a dual machine where the motor drove two =
implements. One was a small laboratory Jaw Crusher, the other was a =
Vertical Attritor. The jaw crusher reduced biscuit scrap down to about =
quarter inch grit.=20
This feed stuff was passed to the Attritor which milled it down to less =
than minus 1/16 inch. Great for making Grog. But if you wished to use it =
to crush and mill minerals for a glaze then the feedstock had to be ball =
milled to get it down to minus 100 mesh.
When I was making Magnets we had two ball mills. One was the traditional =
two barrel job with rollers. The other was a high energy Planetary Mill =
that had four loading stations. We used this to reduce feedstock down =
from about 1/8 inch screen down to minus 200 mesh. But it was not be =
suitable for ceramics due to the contamination form the metallic balls =
and the metal of the containers. We continued to use the traditional =
barrels to mill ceramic magnet materials.
See if you can find a copy of "Thoroughly Modern Milling" by Stephen =
Harrison. Good value. Includes plans for a simple horizontal ball mill
Best regards,
Ivor Lewis.
Redhill,
South Australia.
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