Donn Buchfinck on thu 29 oct 98
Ok sportsfans, now it is time to tap into all those kiln gurus out there and
solve this problem
I have a downdraft kiln I want to build
stacks two 12 x 24 inch shelves
45 inches along the back
31 1/2 inches deep
19 course until I get to the top of the inside of the arch
thats 47.5 inches high
sprung arch kiln
soft brick kiln with a hard brick floor
4 burner ports
a hood will be over the stack
ie the stack will not be that tall say 6 courses above the inside of the arch
the flue will be 9 inches wide by 10 inches high
the door will be a stacked brick door to begin with
firing with natural gas
what type of burners are the best for this kiln
and to make it interesting I'm going to build the exact same kiln right next
to it to salt fire so I am going to build this one out of hard brick
have I done a good job designing the kiln?
I included some drawing of them and if they do not come out e-mail me and I
will send you what I have drawn
so how do I make this kiln great.
what type of burners do I use
thanks
Donn Buchfinck
Donn Buchfinck on thu 29 oct 98
Ok sportsfans, now it is time to tap into all those kiln gurus out there and
solve this problem
I have a downdraft kiln I want to build
stacks two 12 x 24 inch shelves
45 inches along the back
31 1/2 inches deep
19 course until I get to the top of the inside of the arch
thats 47.5 inches high
sprung arch kiln
soft brick kiln with a hard brick floor
4 burner ports
a hood will be over the stack
ie the stack will not be that tall say 6 courses above the inside of the arch
the flue will be 9 inches wide by 10 inches high
the door will be a stacked brick door to begin with
firing with natural gas
what type of burners are the best for this kiln
and to make it interesting I'm going to build the exact same kiln right next
to it to salt fire so I am going to build this one out of hard brick
if you want to see what I have drawn I can e-mail you the files
so how do I make this kiln great.
what type of burners do I use
thanks
Donn Buchfinck
Marcia Selsor on sun 1 nov 98
I have a similar size kiln at our Univ. I use two venturi burners from
the rear (one on each side of the chimney)
Ask Marc Ward for this type of burner you could use.
He'll help lots!
Marci in Montana
Donn Buchfinck wrote:
>
> ----------------------------Original message----------------------------
> Ok sportsfans, now it is time to tap into all those kiln gurus out there and
> solve this problem
>
> I have a downdraft kiln I want to build
>
> stacks two 12 x 24 inch shelves
>
> 45 inches along the back
> 31 1/2 inches deep
> 19 course until I get to the top of the inside of the arch
> thats 47.5 inches high
> sprung arch kiln
> soft brick kiln with a hard brick floor
> 4 burner ports
> a hood will be over the stack
> ie the stack will not be that tall say 6 courses above the inside of the arch
> the flue will be 9 inches wide by 10 inches high
> the door will be a stacked brick door to begin with
>
> firing with natural gas
>
> what type of burners are the best for this kiln
>
> and to make it interesting I'm going to build the exact same kiln right next
> to it to salt fire so I am going to build this one out of hard brick
>
> have I done a good job designing the kiln?
> I included some drawing of them and if they do not come out e-mail me and I
> will send you what I have drawn
>
> so how do I make this kiln great.
> what type of burners do I use
>
> thanks
>
> Donn Buchfinck
Gail Phillips on fri 18 dec 98
Hi -
I have just built a 25 cu. ft. gas kiln to be fired using natural gas.
I would like to know where to find burners, either new or used at a
reasonable price. I require four, and the materials list from the
instructions I used called for 150,000 BTU rated. I think that I would
prefer venturi-style burners, but I am not sure if I am set up properly
from the gas company with adequate pressure. I guess I also need safety
kits (thermocouples, baso valves, etc.). This is a downdraft kiln, with
two burner ports in front and two in back. The kiln is constructed of
K-26 on the inside, with K-20 on the outside. There will also be a
refractory blanket, 1" thick, lining this kiln. I live in the
Indianapolis area. Please help the newbie.
Thanks.
Gail Phillips
mantispots@earthlink.net
Marc Ward on sat 19 dec 98
Gail,
One of the unfortunate things my job entails is to be the bearer of bad
news.... Many folks build kilns with the burners as an afterthought. Unless
your natural gas company can give you a high pressure feed, you're going to
have trouble with 4 Venturi's firing this kiln at 150,000 BTU per burner. Six
burners would be more like it unless you get huge Venturis. Now, this brings
into question your port and flue size. It's all related. If you can get
several pounds of pressure to the kiln, you'll be fine. But, if you can't,
there are some issues you'll need to deal with. Too many to go into here. For
folks out there ready to build a kiln a word of advise; whether you call us or
someone else, determine burner requirements and size, gas supply, port sizes,
ect. BEFORE you build. Gail, feel free to give us a call to discuss your
situation.
Marc Ward
Ward Burner Systems
PO Box 333
Dandridge, TN 37725
USA
423.397.2914 voice
423.397.1253 fax
wardburner@aol.com
Gail Phillips on sun 20 dec 98
Marc -
I called the gas company yesterday, and they told me that I have "six inches of
water column" and can get up to two pounds more of pressure if I ask for it.
Would power burners be the way to go? I bought a used kiln from someone, and th
had some homemade burners with copper supply lines - I didn't think that was a
great idea, so I pitched 'em. They were power, though. I tried to call you
yesterday, too, but you weren't in. I ordered a catalog.
We'll talk soon, I'm sure.
-Gail
Marc Ward wrote:
> ----------------------------Original message----------------------------
> Gail,
>
> One of the unfortunate things my job entails is to be the bearer of bad
> news.... Many folks build kilns with the burners as an afterthought. Unless
> your natural gas company can give you a high pressure feed, you're going to
> have trouble with 4 Venturi's firing this kiln at 150,000 BTU per burner. Six
> burners would be more like it unless you get huge Venturis. Now, this brings
> into question your port and flue size. It's all related. If you can get
> several pounds of pressure to the kiln, you'll be fine. But, if you can't,
> there are some issues you'll need to deal with. Too many to go into here. For
> folks out there ready to build a kiln a word of advise; whether you call us or
> someone else, determine burner requirements and size, gas supply, port sizes,
> ect. BEFORE you build. Gail, feel free to give us a call to discuss your
> situation.
>
> Marc Ward
> Ward Burner Systems
> PO Box 333
> Dandridge, TN 37725
> USA
> 423.397.2914 voice
> 423.397.1253 fax
> wardburner@aol.com
Marc Ward on tue 22 dec 98
Gail
<<<inches of
water column" and can get up to two pounds more of pressure if I ask for it.
Would power burners be the way to go? I bought a used kiln from someone, and
th
had some homemade burners with copper supply lines - I didn't think that was a
great idea, so I pitched 'em. They were power, though. I tried to call you
yesterday, too, but you weren't in. I ordered a catalog.>>>>
If you can get 2 psi you're fine. (8 times the 6" you currently have) you're
fine. To reach me, you'll need to leave a voicemail message. Just follow the
prompts, and leave a number. Sorry, too many phone calls and just one of me.
When the number is busy you are automatically switched to voicemail. I know
folks hate it, but they hate a constant busy signal more. I had to put it in
after customers were reporting our phone out of order.
Marc Ward
Ward Burner Systems
PO Box 333
Dandridge, TN 37725
USA
423.397.2914 voice
423.397.1253 fax
wardburner@aol.com
Leslie Norton on tue 22 dec 98
Gail,
I built a 45 cubic foot kiln last year with K-23's inside and out. It has a
4 1/2 arch with 4" of fiber over it, but no other insulation on the walls.
I put 8 of those cheap 75,000 BTUs cast iron burners (I think they are
called MR75's, most pottery supplies carry them for under $30 each, sometime
much cheaper, you might also look into the "ceramic burners" that Laguna
carries. These will let you turn the flame way down without "burning at the
orifice". Email me directly if you want to know more about these burners,
they are very, very good venturi burners.) on the kiln. Having fired for
many years with propane and "pounds" of pressure, I assumed I needed
something similar with natural gas. I jumped through a lot of hoops to get
2 pounds of pressure on the line, spend large amounts of money to buy two
regulators.. one to reduce the pressure back down for my house and one to
control pressure for my kiln. After a few firings and tunings I have a kiln
that fires beautifully...
BUT!!
- I only use 6 burners.
- I only use 8" water column maximum, but could probably fire at 6".
-I never turn the burners all the way up.
- I take about 10 hours to fire the kiln to cone 10 flat. I'm pretty sure I
could do it in 6 hours with the same pressure and number of burners, but I
prefer the longer firing cycle. I have 5 different cone packs placed around
the kiln looking for cold or hot spots, but they all go down together and my
pyrometer shows the same temperature on top and bottom when I shut down.
Conclusion:
- You don't need "pounds" of pressure to fire a kiln in the 25 to 45 cu ft.
range.
- You don't need burners that cost hundreds of dollars.
Precautions"
- Make sure you install safety shut off valves!!
- Use a BIG supply line from your regulator to your kiln (There is a direct
relation to the distance your kiln is from the regulator and lose of
pressure.. related to volume). Volume of gas is important here. You don't
want to start with 6" water column and watch it drop to 2" when all the
burners are turned all the way up.
Another note of interest is that I have a friend in California that fires a
45 cubic foot kiln with the ceramic venturi burners on 4 inches of water
column pressure.
-Les
(in Seattle where it is way to cold today)
"Technique and skills must be absorbed and wrapped up and put away to
become such an integral part of yourself that they will be revealed in your
work without your thought"
Shoji Hamada
-----Original Message-----
From: Gail Phillips [mailto:mantispots@earthlink.net]
Sent: Friday, December 18, 1998 5:48 AM
To: CLAYART@LSV.UKY.EDU
Subject: Re: kiln burners
----------------------------Original message----------------------------
Hi -
I have just built a 25 cu. ft. gas kiln to be fired using natural gas.
I would like to know where to find burners, either new or used at a
reasonable price. I require four, and the materials list from the
instructions I used called for 150,000 BTU rated. I think that I would
prefer venturi-style burners, but I am not sure if I am set up properly
from the gas company with adequate pressure. I guess I also need safety
kits (thermocouples, baso valves, etc.). This is a downdraft kiln, with
two burner ports in front and two in back. The kiln is constructed of
K-26 on the inside, with K-20 on the outside. There will also be a
refractory blanket, 1" thick, lining this kiln. I live in the
Indianapolis area. Please help the newbie.
Thanks.
Gail Phillips
mantispots@earthlink.net
J. D. Walker on wed 23 dec 98
les,
less pressure is good some times. I fire a 16 cu ft stack space on 6 mr75's
and only use 1 1/4" water column. still fires good in 10 to 14 hours
depending on the out side barametric pressure
jeff
where it is really cold in the mid west
jdpotter@iland.net
Eric Ciup on fri 14 jul 00
I have 4 ensign ribbon burners for sale.They run about 50k to 120k btu
per
burner depending on pressure and orifice size.They are set up presently
for
low pressure propane.Each burner has basso valve and
pilot burner, presure guage, main valve,metering valve, and flame
retention
nozzle. They are natural draft venturi burners with a 1 1/2 inch outlet.
Very
clean,no rust. I am asking $165 each, shipping extra.
I am located in Montreal Quebec Canada
Eric Ciup
514-697-2093
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