Thermal Insulation

http://www.fiberfrax.com/

We use these fiberfrax products. The modules are actually a sandwich of individual pieces of blanket,that are installed perpendicular to the furnace wall, held up with their system. This way if damaged, a whole section doesn't come down. Their web site is a wealth of information on this subject.

Brick top is correct. The modules come in different "squares" and thickness's. If you have a air velosity greater than 110 f/sec I would spray the recommended shell hardener, if not don't do it because the shell degrades your insulation noticably. The guys at Western Industrial Ceramics in Portland Oregon will help you with hot side cold side calc's. Ask for Jim Houston or Bill Largent. They also offer vacume formed ceramic fibre products.

Tell them I said Hi...great guys.

They make bolts and a prong type device to be tack welded to the surface. Both device are made of high temp steel. The insulation is impaled on to them. Then nutted or clip in to place. Before we used the furnace the insulation was sprayed with a glazing compound similar to whats used to glaze pottery. Then heated up the glazing compound formed a hard crust on the surface. This hard surface aided in keeping the material in place.

There are other ways then laying the sheets of ceramic fiber. They make tiles that the fiber has been tightly looped and adhered to an expanded metal plate. Studs are tacked on and the tiles are bolted down.

thats how we do it for oxidizers and combustion chambers. Good answer

I the late seventies had the pleasure of stripping and relining two of three heat treat furnaces for an oil field tool manufacture. The furnaces were rail car size. We went from the lay in to the tiles.

My only complaint is that I still itch when i think about it.

I'm sure there was no asbestos. I'm totally convinced your employer would never expose you to that.

I've done jobs when I was covered with 1/2 in of that stuff, back in the 70's.

Not dead yet, but still itch once in a while.

Its not only insulation materials, its what is being processed in these units???????.

When your rebuilding or servicing them

I attended an asbestos supervisor certification school in January and I asked an old retired insulator what did he think would be the next asbestos. He told me that he tells everyone to put on as much of the kao-wool and fiber frax type insulation as they can. He thinks they will be payed well to remove it when we figure out what kind of disease it causes as they did with asbestos in the early 70's. I use this stuff allot on the small glass furnaces I build and I can't stress enough the importance of wearing a mask when fooling with it. I think all of the manufacturers make an attachment system that is basically similar. The one I have used is the thermal ceramic brand one with the 310 stainless or 635 inconel bull horns that you tack to the structure and the ceramic washer that fastens the bats of insulation to it. I would suggest you go to any of the manufactures websites for tons of free information.

pipewelder