Gene Arnold on thu 25 oct 07
I will be firing the MFT kiln that Latonna and I built in the next few =
days. We have never fired or been involved in the firing of a gas kiln. =
So could come one give me some guide lines or things that I should be =
looking for or be aware of when I do this firing. i.e.. Temperature rise =
rate per hour, damper positions at what temperatures. How will I know if =
I'm getting or if I'm in reduction. I will be using a pyrometer and =
cones to guide me. I don't have an oxygen probe. See what I mean I need =
help!!
I will be firing to cone 10 reduction. Hopefully.
The kiln is about 40 cu. ft. car kiln and is built to Nils Lou's plans. =
I will be using 2 Ransom (spelling) B-4's burners on propane.
This is the first gas pottery kiln in our county and the nearest one to =
us is about 2 hours away. So I'm kind of my own here.
Thanks for any help!!!
Gene & Latonna
mudduck@mudduckpottery.net
www.mudduckpottery.net
Jennifer Boyer on fri 26 oct 07
Natural or LP?
What is the range of your pressure gauges?
Jennifer
On Oct 25, 2007, at 6:29 PM, Gene Arnold wrote:
> I will be firing the MFT kiln that Latonna and I built in the next
> few days. We have never fired or been involved in the firing of a
> gas kiln. So could come one give me some guide lines or things that
> I should be looking for or be aware of when I do this firing. i.e..
> Temperature rise rate per hour, damper positions at what
> temperatures. How will I know if I'm getting or if I'm in
> reduction. I will be using a pyrometer and cones to guide me. I
> don't have an oxygen probe. See what I mean I need help!!
>
> I will be firing to cone 10 reduction. Hopefully.
>
> The kiln is about 40 cu. ft. car kiln and is built to Nils Lou's
> plans. I will be using 2 Ransom (spelling) B-4's burners on propane.
>
> This is the first gas pottery kiln in our county and the nearest
> one to us is about 2 hours away. So I'm kind of my own here.
>
>
> Thanks for any help!!!
> Gene & Latonna
> mudduck@mudduckpottery.net
> www.mudduckpottery.net
>
> ______________________________________________________________________
> ________
> Clayart members may send postings to: clayart@lsv.ceramics.org
>
> You may look at the archives for the list, post messages, or change
> your
> subscription settings here: http://www.acers.org/cic/clayart/
>
> Moderator of the list is Mel Jacobson who may be reached at
> melpots2@visi.com
*****************************
Jennifer Boyer
Thistle Hill Pottery
Montpelier, VT
http://thistlehillpottery.com
*****************************
Gene Arnold on fri 26 oct 07
Jennifer
We are using propane. The regulator is a high pressure regulator up to 25
lbs. plus capable I think.
Gene & Latonna
mudduck@mudduckpottery.net
www.mudduckpottery.net
----- Original Message -----
From: "Jennifer Boyer"
To:
Sent: Friday, October 26, 2007 7:49 AM
Subject: Re: cone 10 firing schedule
> Natural or LP?
> What is the range of your pressure gauges?
> Jennifer
> On Oct 25, 2007, at 6:29 PM, Gene Arnold wrote:
>
>> I will be firing the MFT kiln that Latonna and I built in the next
>> few days. We have never fired or been involved in the firing of a
>> gas kiln. So could come one give me some guide lines or things that
>> I should be looking for or be aware of when I do this firing. i.e..
>> Temperature rise rate per hour, damper positions at what
>> temperatures. How will I know if I'm getting or if I'm in
>> reduction. I will be using a pyrometer and cones to guide me. I
>> don't have an oxygen probe. See what I mean I need help!!
>>
>> I will be firing to cone 10 reduction. Hopefully.
>>
>> The kiln is about 40 cu. ft. car kiln and is built to Nils Lou's
>> plans. I will be using 2 Ransom (spelling) B-4's burners on propane.
>>
>> This is the first gas pottery kiln in our county and the nearest
>> one to us is about 2 hours away. So I'm kind of my own here.
>>
>>
>> Thanks for any help!!!
>> Gene & Latonna
>> mudduck@mudduckpottery.net
>> www.mudduckpottery.net
>>
>> ______________________________________________________________________
>> ________
>> Clayart members may send postings to: clayart@lsv.ceramics.org
>>
>> You may look at the archives for the list, post messages, or change
>> your
>> subscription settings here: http://www.acers.org/cic/clayart/
>>
>> Moderator of the list is Mel Jacobson who may be reached at
>> melpots2@visi.com
>
> *****************************
> Jennifer Boyer
> Thistle Hill Pottery
> Montpelier, VT
> http://thistlehillpottery.com
> *****************************
>
> ______________________________________________________________________________
> Clayart members may send postings to: clayart@lsv.ceramics.org
>
> You may look at the archives for the list, post messages, or change your
> subscription settings here: http://www.acers.org/cic/clayart/
>
> Moderator of the list is Mel Jacobson who may be reached at
> melpots2@visi.com
>
Jennifer Boyer on fri 26 oct 07
Hmm,
I think my regulator is low pressure. I can tell you how my 40 cu ft
softbrick kiln with 2 rear mounted B-4's runs.
6 AM Pilots
7 AM 1 burner on 2 lbs
8 AM 2 burners on 2 lbs
9:30 2.5 lbs
10:30 3 lbs
Firing over at about 7 PM
I look for about 300/hr temp increase in the beginning. This slows
down as the temp reaches the higher limits, but that's ok since I
want to soak my glazes. There is a point where increasing the gas
pressure does NOT increase the rate of temp rise. This is something
you have to learn about your kiln. Also there is a damper/pressure
balance to get to know, in order to get yourself out of a stall.
My kiln starts out with the bottom much cooler than the top since the
heat rises to the top. As the firing progresses, the bottom catches up.
All this has a lot to do with the placement of your bag walls, or
target bricks. I have the latter, not the former, and I've adjusted
them over time. My target brick angle will heat up the top more if it's
at a steeper angle. I also have some bricks in the flame path like
Nils's plans. These create turbulance.
I have a 2 probe Fluke pyrometer to show me what's happening top and
bottom.
I adjust my damper to alter top to bottom temps.
My kiln likes at least 6 inches between the first and second shelves.
Otherwise the bottom shelf stays really cold.
Your mileage WILL vary! Take good notes and adjust each firing til
you get what you want.
Jennifer
> Jennifer
>
> We are using propane. The regulator is a high pressure regulator up
> to 25
> lbs. plus capable I think.
>
>
> Gene & Latonna
> mudduck@mudduckpottery.net
> www.mudduckpottery.net
>
>
> ----- Original Message -----
> From: "Jennifer Boyer"
> To:
> Sent: Friday, October 26, 2007 7:49 AM
> Subject: Re: cone 10 firing schedule
>
>
>> Natural or LP?
>> What is the range of your pressure gauges?
>> Jennifer
>> On Oct 25, 2007, at 6:29 PM, Gene Arnold wrote:
>>
>>
>> *****************************
>> Jennifer Boyer
>> Thistle Hill Pottery
>> Montpelier, VT
>> http://thistlehillpottery.com
>> *****************************
>>
>> _____________________________________________________________________
>> _________
>> Clayart members may send postings to: clayart@lsv.ceramics.org
>>
>> You may look at the archives for the list, post messages, or
>> change your
>> subscription settings here: http://www.acers.org/cic/clayart/
>>
>> Moderator of the list is Mel Jacobson who may be reached at
>> melpots2@visi.com
>>
>
> ______________________________________________________________________
> ________
> Clayart members may send postings to: clayart@lsv.ceramics.org
>
> You may look at the archives for the list, post messages, or change
> your
> subscription settings here: http://www.acers.org/cic/clayart/
>
> Moderator of the list is Mel Jacobson who may be reached at
> melpots2@visi.com
*****************************
Jennifer Boyer
Thistle Hill Pottery
Montpelier, VT
http://thistlehillpottery.com
*****************************
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