[TheForge] Re: Castable Refractory

Sat May 17 01:22:01 2003

Hi Roger,

Back when you were helping me with advice on my forge, I think you mentioned
that you use high heat at first to get going.  I've been gun shy about
thermally shocking the liner (scared by the refractory tech.), so I start on
low heat and build up.  That's what takes longer in my case (plus a little
thicker liner maybe).  Sounds like I don't need to worry though...

Thanks again for the help, by the way,

Ed

----- Original Message -----
From: "Roger Olsen" <[email protected]>
To: <[email protected]>
Sent: Friday, May 16, 2003 9:11 AM
Subject: [TheForge] Re: Castable Refractory

> Hello Norm,
...

> A castable refractory is not as immediate of heat as Kaowool but once it
> heats up it seems more efficient somehow, possible the whole heat sink
> concept ot something.  I usually let it heat for about 4 or 5 minutes
before
> putting any steel in, it is probably fully heated and totally efficient in
> about 10 to 15 minutes.  I have heard some folks say it takes longer than
> this_______maybe they poured 1&1/2 thick walls or even thicker.  1" has
> proved itself for me with no doubts what so ever.
>
> Roger Olsen
>
> on the East slope of the North Cascades
> _____________________________________
>
> [email protected] wrote:
>
> > I know this has been discussed before on theforge but I didn't pay
> > enough attention.  I have an atmospheric forge that works well and is
> > lined with 2" of kaowool and then covered with ITC 100.
> >
> > Now I want to make a forge that is lined with Mizzou castable
> > refractory 3000 degree.Just got the refractory today (55 lbs for
> > $27.50)  but no info with it or on the bag as far as specifications or
> > applications are concerned.  I assume I just mix water with it and not
> > make it too soupy--I'll just wait plenty long for it to set up.  What
I'm
> > wondering is:
> >
> > Does it help to put a short metal rods, screws, or whatever through
> > the sides of the forge to help hold the lining in place once dry?
> > What's the best thing to use?
> >
> > What's the best way to make a removable form to fit the inside of the
> > forge to shape the inside opening?
> >
> > What are the disadvantages and advantages of using castable
> > refractory as opposed to kaowool or durablanket type insulation?
> >
> > Does Mizzou type material make a good floor for  a forge?
> >
> > I plan to make the forge out of about a 10" or 12" pipe with about a
> > .09 wall and form a flat place in the pipe for the bottom of the forge.
> >
> > Been thinking about making the thickness of the insulation
> > somewhere between 1.5 and 2 inches.  Will this be adequate?
> >
> > Any suggestions or tips anyone has will be truly appreciated.
> > Thanks in advance for your help.
> >
> > Norm Larson
> >
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