Arnold Howard on fri 10 sep 99
I am writing an article on heating elements. Do you have any questions
on elements that you would like us to address? The engineers here enjoy
interesting questions.
Thanks,
Arnold Howard
Paragon Industries, Inc.
__________________________________________________
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Corinne P. Null on sat 11 sep 99
Bless you!
Why have the elements not deteriorated on the kiln that only goes to 1875F?
Have fired that kiln probably over 300 times, and it still hums along just
fine right on schedule.
Is glaze firing more damaging to the elements?
Is it the clay and glaze materials that damage the elements, or the heat
temp?
Is it proven that an exhaust system will extend the life of the elements?
Why aren't really heavy elements made to withstand the forces of reduction
for us frustrated electic firing potters?
Corinne Null
Bedford, New Hampshire
null@mediaone.net
-----Original Message-----
From: Ceramic Arts Discussion List [mailto:CLAYART@LSV.UKY.EDU]On Behalf
Of Arnold Howard
Sent: Friday, September 10, 1999 3:29 PM
To: CLAYART@LSV.UKY.EDU
Subject: Kiln heating elements
----------------------------Original message----------------------------
I am writing an article on heating elements. Do you have any questions
on elements that you would like us to address? The engineers here enjoy
interesting questions.
Thanks,
Arnold Howard
Paragon Industries, Inc.
__________________________________________________
Do You Yahoo!?
Bid and sell for free at http://auctions.yahoo.com
wschran@erols.com on sun 12 sep 99
Arnold - Previous discussions involved - "when is it time to change
elements?" perhaps a thorough article on this would be good.
How about the pros & cons of coating elements with ITC products. Is
there any real savings? How can one get the most out of a set of
elements? What about different kinds of elements besides Kanthal. Bill
Cheryl L Litman on sun 12 sep 99
Arnold,
My studio gets chilly in the winter - any harm in opening the
lid/propping the lid and turning the kiln to high for an hour to take the
chill off?
At camp I put wetware into the kiln, turn on the vent, everything
buttoned up and candle at 175 overnight. Am I harming the elements by
using the kiln to force dry wares?
Cheryl Litman
Somerset, NJ
email: cheryllitman@juno.com
On Fri, 10 Sep 1999 15:28:57 EDT Arnold Howard
writes:
>
> ----------------------------Original
> message----------------------------
> I am writing an article on heating elements. Do you have any
> questions
> on elements that you would like us to address? The engineers here
> enjoy
> interesting questions.
>
> Thanks,
>
> Arnold Howard
> Paragon Industries, Inc.
> __________________________________________________
> Do You Yahoo!?
> Bid and sell for free at http://auctions.yahoo.com
Cheryl Litman
Somerset, NJ
email: cheryllitman@juno.com
Pottery by Dai on sun 12 sep 99
Arnold or others-in-the-know: I have a question about individual elements
for a kiln. I have, at various times, purchased elements and have been
asked, along with the make, model, etc. info, whether it was for the bottom,
middle or top. I have also purchased elements where this question never
came up, and in fact my last few purchases have been for whole sets (yes,
I'm finally smartening up and replacing everything at once), and they
have not come with any identification as to where they go, and all look
identical. Considering the problem of lower temperatures at the bottom of
the kiln, wouldn't it make sense to have an element that would emit more
heat there? Is my current (pun) element-winding person not on the ball?
Should I be going to the kiln manufacturer for my elements? Or just someone
who specifies the position of the element? Help!
Dai Scott - confused in Kelowna, B.C.
potterybydai@home.com
Tom Buck on sun 12 sep 99
corinne:
see below.
Tom Buck ) tel: 905-389-2339
(westend Lake Ontario, province of Ontario, Canada).
mailing address: 373 East 43rd Street,
Hamilton ON L8T 3E1 Canada
On Sat, 11 Sep 1999, Corinne P. Null wrote:
> ----------------------------Original message----------------------------
> Why have the elements not deteriorated on the kiln that only goes to 1875F?
> Have fired that kiln probably over 300 times, and it still hums along just
> fine right on schedule.
The loss of metal evaporating from the element is a function of how
close you are to the Kanthal alloy's melting point (which is very high).
Cone 06 is low on the Kanthal scale, so the elements just last longer. I
gave the lifetime numbers some time back (repeated just recently). If you
never go above 1900 oF the lifetime goes well above 800 firings (which is
as far as the Kanthal chart goes).
> Is glaze firing more damaging to the elements? >
Not always. Among the nasties (gases) that affect the alumina coating on
the surface of the element wire are: the Halogens (Fluorine, Chlorine,
Bromine, Iodine), the compounds formed by these chemical elements with
Hydrogen, Silicon, and possibly Aluminum, and compounds of Sulfur with the
Halogens and with Oxygen. There usually are trace amounts of these nasties
in natural clay materials and some natural minerals used in glazes. So
good ventilation helps extend Kanthal alloy lifetime.
> Is it the clay and glaze materials that damage the elements, or the heat
> temp?
Answered above.
> Is it proven that an exhaust system will extend the life of the elements?
I am not sure "proven" applies here; I do not know of any report
of work done solely to verify this point.
> Why aren't really heavy elements made to withstand the forces of reduction
> for us frustrated electic firing potters?
>
There are heavy duty elements made; they just cost 3-5 times as much per
unit... Kanthal is a special alloy and is expensive and is sold by weight.
Hence, thicker elements weigh a lot more, cost a lot more. Most potters
won't go for the extra cost. Speak to Chris at Euclid's if you wish to
know more about this.
Bye for now. Peace. Tom.
Vince Pitelka on mon 13 sep 99
>Should I be going to the kiln manufacturer for my elements? Or just someone
>who specifies the position of the element? Help!
Dai -
Some kilns have different resistance elements in different locations, so the
companies that sell elements for most kilns are inclined to ask you for the
position of the element, just in case. We have a small skutt, a few L&L
J230s, and two Unique frontloaders, and in each kiln the elements are all
the same throughout the kiln. I used to buy all my elements from the
original manufacturer, but a few years ago we started buying our elements
from Euclid's in Canada. They have great prices, top quality elements, and
they give excellent service. Chris at Euclid's is a fount of knowledge on
all aspects of electric kilns, and very willing to give you any needed
advice. I am not connected with Euclid's in any way, other than as a
customer, but I do believe in passing on information about vendors that give
me excellent service. Contact them at
Euclid's Kilns and Elements
800/296-5456
Web Site: http://www.euclids.com
E-Mail mail@euclids.com
Best wishes -
- Vince
Vince Pitelka - vpitelka@DeKalb.net
Home 615/597-5376, work 615/597-6801 ext. 111, fax 615/597-6803
Appalachian Center for Crafts
Tennessee Technological University
1560 Craft Center Drive, Smithville TN 37166
bartinst@interl.net on mon 13 sep 99
bartins-@interl.net wrote:
Arnold,
I have been asked about ITC coating for elements. What is a
manufacture's point of view?
Dave Bartlett
Bartlett Instrument Co.
original article:http://www.egroups.com/group/clayart/?start=52272
> ----------------------------Original message-------------------------
---
> I am writing an article on heating elements. Do you have any questions
> on elements that you would like us to address? The engineers here
enjoy
> interesting questions.
>
> Thanks,
>
> Arnold Howard
> Paragon Industries, Inc.
> __________________________________________________
> Do You Yahoo!?
> Bid and sell for free at http://auctions.yahoo.com
>
>
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