Nikom Chimnok on thu 26 aug 99
Hello,
I am writing to pose the question, What is the superior machine for
grinding grog?
At present I am using a homemade hammermill, 5 HP, about 1800 RPM.
The screen has 1/8" holes, which makes a reasonable largest size, as these
are big rough pots. The problem is that 40-50% of the product is dust
smaller than 120 mesh, which I understand is the cutoff point.
I can get rid of the dust by screening, but this represents a
considerable waste of time and electricity, effectively doubling the price
of the grog and the time it takes to make it.
What machine will produce exactly the particle size I am
after--approximately an even mix in a range from 20 or 30 to 120 mesh? Would
a roller mill work better? I have Harry Davis' book, in which he describes
the construction, and it seems possible to make.
A ball mill doesn't seem like the answer. I have no experience with
jaw crushers, but do know they're formidably expensive. What machines do
grog-producing companies use? Are there any other alternatives?
Thanks in advance, if anyone can tell me anything.
Nikom in Thailand
David Hendley on sun 29 aug 99
I am far from an expert on grog-making, but I think
the hammermill is the most appropriate machine
for the job. Perhaps you could modify your machine
so it will not produce so much dust. My hammermill,
for example, does not produce enough small particles
and I have to run things through it twice (of course I
don't want 1/8" grog - ouch!).
Some logical, but untried, things that come to mind are
lowering the speed, using smaller hammers, or removing
some of the hammers......
A ball mill is NOT a grog maker. Material from the ball
mill will have a smooth, rounded shape, and grog should
be angular-shaped pieces.
--
David Hendley
Maydelle, Texas
hendley@tyler.net
http://www.farmpots.com/
----- Original Message -----
From: Nikom Chimnok
To:
Sent: Thursday, August 26, 1999 10:59 AM
Subject: Making grog
| ----------------------------Original message----------------------------
| Hello,
| I am writing to pose the question, What is the superior machine
for
| grinding grog?
|
| At present I am using a homemade hammermill, 5 HP, about 1800 RPM.
| The screen has 1/8" holes, which makes a reasonable largest size, as these
| are big rough pots. The problem is that 40-50% of the product is dust
| smaller than 120 mesh, which I understand is the cutoff point.
|
| I can get rid of the dust by screening, but this represents a
| considerable waste of time and electricity, effectively doubling the price
| of the grog and the time it takes to make it.
|
| What machine will produce exactly the particle size I am
| after--approximately an even mix in a range from 20 or 30 to 120 mesh?
Would
| a roller mill work better? I have Harry Davis' book, in which he describes
| the construction, and it seems possible to make.
|
| A ball mill doesn't seem like the answer. I have no experience
with
| jaw crushers, but do know they're formidably expensive. What machines do
| grog-producing companies use? Are there any other alternatives?
|
| Thanks in advance, if anyone can tell me anything.
|
| Nikom in Thailand
|
Gwyn Ace on wed 23 jan 02
I have always used grog made from firebricks and it has always worked =
well. Am I correct in thinking that a refractory grog like this would =
give greater strength to the pot in the firing than a grog made from the =
body clay ??
I understand that Harry Davis ..when he was working in N.Z. used to make =
his own grog from any cracked firebricks...props ..broken shelves etc. =
No waste !!!
GWYN in N.Z.
| |
|
