The Craftmans Shop > New from Old
Resurrection of a CFEI 100 KVA Induction Furnace
awemawson:
Thanks Murray - as you will see from the pictures below I've managed to remove the perforated tile without breaking it, although I've yet to clear about 20 holes that are refusing to be poked free. Perhaps a carbide drill will work if I can find any long enough and thin enough (1/8" x 2")
The fire cement / grout or whatever it should be called that surrounds the tile and seals it to the 'quadrant tiles' and the plenum chamber is very friable and crumbly - probably intentionally to allow for expansion and contraction. Whatever it is it's the correct stuff that I bought from Flamefast years back. The tile sits on a fibrous substance that sits on the steel of the plenum chamber. Now I (perhaps foolishly) didn't replace this all those years ago and it has totally fragmented. Whether it is intended as a gas seal or just as a thermal cushion between the steel and ceramic I'm not sure. I have a call in to Flamefast but they've not come back to me yet.
It is possible the 'gasket' is just Kaowool or similar.
awemawson:
Blowing through the 'perhaps Kaowool' tells me it's far too permeable to be a seal so I think that it is just a thermal barrier and perhaps also an 'expansion cushion' between the steel and ceramic bits.
The good news is that I have managed to clear ALL the perforations in the tile by extremely gentle and slow application of an 1/8" HSS jobber drill. Much to my surprise it slowly dislodged material that was too stuck for an 1/8" punch and hammer to move.
(anyone want a grossly maltreated 1/8" drill bit :clap: )
hermetic:
Well Done Andrew! not an easy task without a breakage! I have today dug out the paperwork which came with my torch when it was rejigged for propane/butane, and the torch demand is 1.66 Kg/hr and output 23.5kW for the T4 torch.
Phil
Edit, this effectively puts me in the same boat, except that the T4 operating pressure is 35mbar, not 37 will that regulator be ok or not? For what they cost, I will buy a higher throughput 35mbar one!!
awemawson:
Thanks Phil,
Those figures tie in pretty well exactly with what I was given by Flamefast but means that your regulator is marginal at 1.5 kg/H
hermetic:
I now find that nearly everyone sells 37mbar, but not 35mbar! Will look again tomorrow, Time for T and bed!!
Phil
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