Post by russellcollins on Oct 28, 2019 0:39:42 GMT -8
I've been hunting all over the net for clarity on what to use as a surface coating for our range of stoves made in India that meets the following criteria:
1. High Emissivity 2. High hardness at temps up to 600+C 3. Non toxic for direct food contact 4. Non toxic with regards to off gassing 5. Able to be applied in a facility in India (where we produce).
The steel to be coated is HRS (Hot Rolled Mild Steel) although we could switch to CRS (Cold Rolled) if necessary as that apparently has better bonding qualities.
Does anyone have any tips on what coatings are being used on commercial combustion heater products? It's hard to find any clear answers on this point. I've tried a range of high temp powder coatings and paints, and all have failed the hardness test at 500-600C.
I am wondering about plasma coatings and ceramic coatings, trying to find out whatever the industry is using to get that nice matt black finish that is apparent on most heating products on the market.
" I've been hunting all over the net for clarity on what to use as a surface coating for our range of stoves made in India that meets the following criteria. 3. Non toxic for direct food contact" I'm assuming that you're talking about a cooktop Russel ? something safe for cooking flat breads? cast iron would be a good solution although the cost of production is higher than steel plate. Maybe just an insert made of cast iron in a steel top ?
Post by Karl playing with geopolymers on Apr 29, 2021 4:58:11 GMT -8
In the USA grog seems only to refer to fired and grinded kaolin clay of te highest alumina content. Chamotte or Schamotte may be made of any kind of clay with low or high alumina content eventually containing significant amounts of other metal oxides. with a similar thermal expansions coefficient like the iron it is applied on it will work, else not.
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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?
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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 firstname.lastname@example.org..... the photos in this post did not show up
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