|
|
Post by cletus on Mar 16, 2020 12:50:10 GMT -8
|
|
|
|
Post by martyn on Mar 17, 2020 2:12:47 GMT -8
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.
|
|
|
|
Post by cletus on Mar 18, 2020 6:08:51 GMT -8
Thanks for the heads up. My googling didn't turn up a deal like that. Do you or anyone else have any leads/sources? I apologize for such elementary questions.
|
|
|
|
Post by martyn on Mar 18, 2020 8:05:07 GMT -8
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 |
|
|
|
Post by cletus on Mar 22, 2020 8:55:16 GMT -8
Thanks, martyn. I'll do some searching.
|
|
|
|
Post by keithturtle on Mar 23, 2020 19:24:05 GMT -8
I have been using this product with good results www.foundryservice.com/product/insulating-castables/kast-o-lite-26-insulating-castable-2600of/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 Turtle |
|
|
|
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.
I plan on some higher heat use in the fall
Turtle
|
|
|
|
Post by cletus on Mar 24, 2020 12:46:46 GMT -8
Thanks, Mr. Turtle. I'm still trying to decide on a final approach and appreciate all leads!
|
|
|
|
Post by pigbuttons on Mar 24, 2020 18:11:28 GMT -8
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. |
|
|
|
Post by cletus on Apr 6, 2020 6:31:47 GMT -8
pig buttons, thanks! Sorry it took so long to respond. I just discovered you had commented; a timely discovery as I am getting closer to attempting a first cast.
|
|
