Hi Folks
I'm assembling bits and bobs to build my furnace - for the first attempt I'm going to use a lining of fireclay plus...grog.
From what I've read it seems the 'bits' in my refractory concrete will be there to lessen shrinking and cracking of the clay-plus silica-sand mortar - that's what the potters seem to say.
Some use Perlite, and some use broken up firebricks. Some say Perlite melts at too low a temp. I'm having trouble finding the latter where I am, and although I'm still searching for a broken clay fireback, I've not yet found one. I did read that Belfast sinks (is that a UK term?) are made of fireclay, and I have one of those I could smash up...any comments? And if that works...old toilets? Crockery??
cheers
Mark
I'm assembling bits and bobs to build my furnace - for the first attempt I'm going to use a lining of fireclay plus...grog.
From what I've read it seems the 'bits' in my refractory concrete will be there to lessen shrinking and cracking of the clay-plus silica-sand mortar - that's what the potters seem to say.
Some use Perlite, and some use broken up firebricks. Some say Perlite melts at too low a temp. I'm having trouble finding the latter where I am, and although I'm still searching for a broken clay fireback, I've not yet found one. I did read that Belfast sinks (is that a UK term?) are made of fireclay, and I have one of those I could smash up...any comments? And if that works...old toilets? Crockery??
cheers
Mark