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Post by owkaye on Jul 18, 2014 14:02:57 GMT -8
Hello,
I am living in Biloxi Mississippi USA. I want to build a batch-box rocket mass heater for my wife's 12' by 20' greenhouse. If it works well I will hope to build a larger one for our planned new small home. I have read many threads in these forums but this is my first post.
I appreciate the wealth of knowledge being shared here, but I understand only the basic chemistry and furnace theories. I am certain to have more questions as I proceed, but for now I hope to begin with a widely accepted recipe for pourable refractory that I can use to mold my first rocket mass heater.
With so many possible recipes online I am thoroughly confused! Is there someone in these forums who can describe the required materials and step-by-step procedure for making an economical and mostly problem-free pourable refractory?
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hpmer
Full Member
Posts: 240
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Post by hpmer on Jul 18, 2014 14:40:36 GMT -8
I use equal parts of clay, wood ash and sometimes shredded paper.
All completely free, works well and has held up pretty well over time. I just use clay from the backyard, and may just have some good quality stuff, but I've been happy with that mix for years.
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Post by owkaye on Jul 19, 2014 8:10:55 GMT -8
hpmer, I apologize for failing to explain my question properly. I am seeking a specific list of commercially available POURABLE refractory ingredients -- from suppliers in the USA or if necessary international suppliers.
Basically I want to go to stores (local or online), purchase the required materials, then measure, mix and pour them into my own molds.
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Deleted
Deleted Member
Posts: 0
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Post by Deleted on Jul 19, 2014 9:57:09 GMT -8
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Post by patamos on Jul 20, 2014 21:22:35 GMT -8
Hi Hpmer,
If you do a google search for castable refractory products you ought to find companies with distributors in your area.
I purchase my high heat resistance (2800f) castable material in 50lb bags from a company called 'Clayburn' based in Abbotsford BC. I think they have a few distributors back eastern US. I heard recently that they are being bought out by a firm in Texas. I pay about $40 per bag. 2 to 4 bags will do for a batch core and heat riser depending on how thick you cast them... Bound to be a few such companies around, although their numbers have been dwindling along with the downturn in masonry fireplaces - no surprise given how poorly they have been conceived in North America on the whole...
my 2 cents
well being pat
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Post by owkaye on Jul 21, 2014 9:14:26 GMT -8
Hi Pat,
I agree that progress in the development of clean burning fireplaces has virtually stalled in the USA. Also agree that suppliers are getting harder to find. I will continue my internet research on "castable refractory products". Hopefully this will help me to identify suppliers close to me.
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