And thats high temp melts? IE silicon bronze and iron?? Thats impressive!! Mine get pretty thin after 10 melts. I might be able to get a few more out of them, but wouldnt want to take the chance. Whose crucibles are you using? Im due to order up some more.Only 10 melts? I get between 35-40 melts. I would never use budget crucibles they are really badly made.
If your happy thats all that matters. I think my next furnace ill build with a bore to fit an A8 or A10 with a 1" thick refractory cement hot face backed by the kaowool maybe 2" thick. My small furnace with the A6 is just a little small for some of the stuff I cast, and the big furnace is a fuel pig that takes forever to heat up and just too big. So I need something in the middle, maybe 8" bore? Ill have too look at crucible sizes and figure it out.The kaowool lasts for about 25 iron melts. I get a lot of kaowool given to me so cost is not a problem so why should I use anything else.
How about a couple of pictures of your furnace??