July 10, 20205 yr hello I'm building a forge with ceramic fiber blanket rated 2600F and coating it with a refractory paint rated 5000F. I am wondering if I should put 2 layers of blanket of if I can just put a third layer of coating thanks
July 10, 20205 yr How thick is your ceramic fiber insulation? 2" of the ceramic insulation should be sufficient to keep the heat in on it's own, but since you already have 2 layers of refractory, one inch or so will probably be fine. Then a quarter inch of refractory cement over that will protect the blanket. You could beef up the layer of refractory, but the ceramic fiber is a much better insulator so if you're going to go heavier on something, the blanket will keep the heat in much better.
July 10, 20205 yr Author frazer the ceramic wool is 1" 8# and the reason im asking is because if I put another layer of wool in I will only a space 3" tall and 5" wide so if possible I want to keep space open to make larger items ie. axe heads and hammers
July 10, 20205 yr I'm sorry, I think I misread your initial post. My mistake. I imagine you'll be fine skipping the second layer of the ceramic, especially if it sacrifices that much space in the forge. Still, I'd get a second opinion from someone who knows more than myself.
July 10, 20205 yr Almost certainly, if you catch him in a good mood and ask the question with all the required specifics
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