Not the sort I would choose, you want castable refactory , it is made from crushed fire brick and high temperature cement . Normally comes in 60lb bags at around $30 a bag. The one I use is rated at 1200c but you can also get 1600c for double the cost.
I don’t know where you live but I live on a island near France although I buy my product from England. There are many outlets in the U.K. and France so I assume there will be something near you where ever you live. There might be a key search word like kiln supplies or forge supplies or castable refactory or pizza oven supplies? Here is my supplier www.castreekilns.co.uk/dense-castable-189-c.asp
You can make your own firebrick or any shape you want. Remember that expansion from hot spots can cause it to crack, though not a big deal. Keep shapes simple and use several pieces instead of one or two complex sides.
Got it at a local furnace firebox MFG company, about $40 USD for a 55 lb bag.
Keep it away from dampness if you don't use it all at once
Post by keithturtle on Mar 23, 2020 19:38:20 GMT -8
I also tried some home brew refractory, batch was made with 1 part alumina cement, 1 part fireclay, 2 parts mason sand and 2 parts perlite sifted to 1/8" or less. Add the fire clay last and use as little water as possible; ram it into forms.
This was used to line a clay drainage tile, cast about 3/4" thick wall as a smelter or forge. So far it has held up well but I've not yet got it really hot, just heating metal red/orange to bend.
The alumina cement came from a drilling supply firm, 5 times the cost of portland about $60 for a 94 lb bag.
Is this the right stuff with which to attempt a cast core? Since I have no idea what I'm doing, this seems to be the best way forward.
The Rutland in your post is Castable Refractory.. It will work but is more expensive than the dry mixes. One advantage is that it is pre-mixed to the right wetness. There are a lot of people that build forges with it and they go to temps at or above our rocket stoves. When used for kilns it is often mixed with grog, which is crushed firebrick. They claim that the grog allows for better expansion and thermal shock. If I remember correctly they use 10 - 15% grog.
TexasGonzo: Sooooo glad I found this site! Its always rewarding to find such a super group of folks! To any and all, feel free to PM me anytime. Thanks for having me!
Mar 11, 2019 18:56:41 GMT -8
jlmtech: GADGET: CONSIDER USING A JET PUMP INSTEAD OF A BLOWER FAN TO INDUCE DRAFT; NO CLOGGING.
Mar 26, 2019 8:19:28 GMT -8
michaelegan: i am unable to open the sketchup files on my mac. I used sketchup a few years back but apparently the company now requires a subscription. does anyone have any advice/instructions on how to use the program or how to view pictures without spending money?
Aug 20, 2019 18:41:48 GMT -8
mannytheseacow: michaelegan: download AutoCAD student version for free... import .SKP
Aug 23, 2019 13:33:44 GMT -8
topbaza: hi everyone, been searching all over net and this is were i need to be i think!!
Sept 28, 2019 6:16:25 GMT -8
anounaki: Hi, why I cant upload photos when I make new tread to this forum?
Feb 28, 2020 2:09:40 GMT -8
ahansen: photos under 1 mb not possible?
Jun 4, 2020 0:09:21 GMT -8
belgiangulch: Photo's are possible. They must be downloaded elsewhere and the image url (adress) is copyied.
Sept 14, 2020 7:26:15 GMT -8
belgiangulch: While creating a thread click on the small picture in the banner above the reply. A box pops up, paste the image url in the box. Pay no attention to the huge list of numbers and such.When you finish and hit reply your post with pictures will come up.
Sept 14, 2020 7:29:27 GMT -8
deadstarsstillburn: Hi there. I was directed this way by folks on the Permies.com website and am hoping I can get some information on how a total newbie can get started designing, siting, building, and not-dying-in-a-horrible-house-fire with a new RMH in a 160-year old home
Oct 21, 2020 6:52:10 GMT -8
deadstarsstillburn: The people over there recommended either a 6" batchbox or an 8" J-tube. I don't know what those are but am going to try to figure that out. What I need is a blueprint that I can scale to fit the need for my house. I have something likne 5000 square feet
Oct 21, 2020 6:53:00 GMT -8
deadstarsstillburn: but I do not need to heat all of it by any means. probably only need to heat half of that, maybe less.
Oct 21, 2020 6:53:15 GMT -8
deadstarsstillburn: moreover, the house has 3 storeys (large attic) so I assume if I get very efficient heating on the ground floor, that will go a long way toward heating the upstairs as well, no?
Oct 21, 2020 6:53:59 GMT -8
BenAlexanderT: Happy new year everybody. I wish you the best
Dec 31, 2020 15:06:14 GMT -8
Solomon: Anybody in Southern Oregon, in Jackson or Josephine counties?
Jan 16, 2021 21:54:43 GMT -8
gnomedome: i realsie this is from 2009
Apr 14, 2021 8:30:44 GMT -8
gnomedome: i realize this is from 2009 id love to see the photos from this ..as im looking to build a sauna soon similar to this .... if anyody sees this post email@example.com..... the photos in this post did not show up
Apr 14, 2021 8:32:00 GMT -8