[TheForge] Mineral Wool

[Kathy]

Jerry,
Do I hear the term Multi-hole rumbling around in your mind?  :-)
Mikey 

-----Original Message-----
From: theforge-bounces at mailman.qth.net [mailto:theforge-bounces at mailman.qth.net]
On Behalf Of Jerry Smith
Sent: Thursday, May 24, 2007 6:07 PM
To: Sponsored by ABANA
Subject: RE: [TheForge] Mineral Wool

Mikey,

I have a digital thermometer. I am a member of the
casting hobby group. But I plan on using part of this
material and knowledge for my new apprentice to work
with her glass blowing and also give me a small
foundry to play with.

Jerry

--- Kathy <keporter at comcast.net> wrote:

> Jerry,
> The problem does not come in measuring internal
> temperatures, but in comparing
> apples and oranges. The temperature in one forge, no
> matter how scientifically
> gathered, simply won't apply in the next man's
> forge.
> 
> For about six months I answered one challenge after
> another from people who
> insisted they had built my burner designs "exactly
> according to directions" and
> "completely by the book." It was quite an education.
> Finally, I told the last
> naysayer that I would fix his burner for free, just
> like all the others--but I
> would also post what I found out about it on
> Castinghobby (the Yahoo newsgroup
> where I was being constantly challenged after Gas
> Burners was published). He
> decided that he didn't want anything to do with the
> "freebee" on those terms,
> and the river of people who kept insisting they had
> built their burners "exactly
> according to specifications" suddenly dried up.
> 
> Burners are only one part of the heating system we
> call forges. Point taken?
> Mikey
> 
> -----Original Message-----
> From: theforge-bounces at mailman.qth.net
> [mailto:theforge-bounces at mailman.qth.net]
> On Behalf Of Jerry Smith
> Sent: Thursday, May 24, 2007 2:08 PM
> To: Sponsored by ABANA
> Subject: RE: [TheForge] Mineral Wool
> 
> I have adigital meter that can go above 2200 degrees
> and the I have access to a pyrometer that can go up
> to
> 2700 degree, that is F not C
> 
> Jerry
> 
> --- Jeffrey Polaski <jeff.polaski at rgs.uci.edu>
> wrote:
> 
> > >Any comment more than an anecdotal example is not
> > going to be
> > practical,
> > >considering all the variables, including but not
> > limited to:
> > >Forge design and size
> > >Insulating products used
> > >Burner design, construction methods, & size used
> > >And finally gas input pressure employed.
> > Not to be difficult, but it's still be useful if
> > five or so people could
> > give a temperature and conditions report. It could
> > be that
> > ITC-100/Plistix raises the measured temp by, say
> 10%
> > - 20%, without
> > regard to the exact design of the forge. Most of
> the
> > time people can
> > estimate how much propane per hour their forge is
> > using, etc... I don't
> > think that anyone is looking for absolute
> scientific
> > proof, just that
> > it's a reasonable bet. 
> > 
> > I'd love to make some measurements myself, but I
> > don't have any way to
> > accurately measure temperature above 700 degrees
> or
> > so.
> > 
> > 
> > 
> > 
> > Jeff Polaski
> > 
> > -----Original Message-----
> > From: theforge-bounces at mailman.qth.net
> > [mailto:theforge-bounces at mailman.qth.net] On
> Behalf
> > Of Kathy
> > Sent: Thursday, May 24, 2007 12:11 PM
> > To: 'Sponsored by ABANA'
> > Subject: RE: [TheForge] Mineral Wool
> > 
> > Steve Writes:
> > "I do wish someone would measure before and after
> > with ITC100. So far, 
> > all I've heard is anecdotal "it was hotter"."
> > 
> > Any comment more than an anecdotal example is not
> > going to be practical,
> > considering all the variables, including but not
> > limited to:
> > Forge design and size
> > Insulating products used
> > Burner design, construction methods, & size used
> > And finally gas input pressure employed.
> > 
> > Typical improvements, all other factors being
> equal
> > are:
> > >From red to red-orange heat as seen inside forge
> > >From red-orange to pumpkin orange
> > >From pumpkin to orange-yellow
> > >From orange-yellow to lemon-yellow
> > 
> > With water separation to create colloidal zirconia
> > before application of
> > reflective layer; a forge capable of going to
> lemon
> > yellow will then
> > reach
> > yellow-white. If a really hot burner design is
> then
> > turned up, the forge
> > interior turns almost pure white, and its ceramic
> > blanket will suffer
> > immediate
> > damage. If yellow-white heat is maintained for
> more
> > than a few minuets
> > the
> > blanket will suffer the same amount of damage.
> > 
> > What damage? Large chunks of the coated ceramic
> > blanket will peel away
> > from the
> > insulation and will be blown out the exhaust or
> > found on the forge floor
> > upon
> > cool down; this is caused by shrinkage of the
> > underlying blanket below
> > the
> > coating layer. Even rigidizing will only delay
> such
> > damage should a
> > forge is
> > taken to heats over those the ceramic blanket is
> > rated for.
> > Mikey   
> > 
> > 
> > -----Original Message-----
> > From: theforge-bounces at mailman.qth.net
> > [mailto:theforge-bounces at mailman.qth.net]
> > On Behalf Of Steven Smith
> > Sent: Thursday, May 24, 2007 7:10 AM
> > To: Sponsored by ABANA
> > Subject: Re: [TheForge] Mineral Wool
> > 
> > Both Kaowool and Durablanket are brand names.
> Within
> > each brand name are
> > 
> > different products designed to work at different
> > temperatures. You will 
> > be unhappy if you get an inexpensive, low
> > temperature wool. I use 
> > Durablanket "S".
> > 
> > I agree with Bruce's recommendation of 2" thick, 8
> > pounds per cubic foot
> > 
> > density. The denser stuff lasts better against
> > mechanical damage. You 
> > also should put a seal coat on the inside of your
> > forge. You make up a 
> > sort of mud and paint it on. I use Satanite. More
> > expensive options that
> > 
> > reflect IR and improve the efficiency of your
> forge
> > include ITC100.
> > 
> > I do wish someone would measure before and after
> > with ITC100. So far, 
> > all I've heard is anecdotal "it was hotter".
> > 
> > Steve
> > 
> > Jerry Smith wrote:
> > > Folks,
> > >
> > > I need a number or a name or something for model
> > or
> > > brand of mineral wool, I need to buy some
> mineral
> > wool
> > > for rebuilding my forge and to build a new
> furnace
> > for
> 
=== message truncated ===

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