From: ACTSNYC**At_Symbol_Here**CS.COM
Subject: Re: [DCHAS-L] Moldatherm furnace concerns
Date: October 14, 2012 2:36:36 PM EDT
Reply-To: DCHAS-L <DCHAS-L**At_Symbol_Here**MED.CORNELL.EDU>
Message-ID: <6804.718f2a5.3dac6034**At_Symbol_Here**>

That might be true of Moldatherm equipment, but there are a variety of RCF products.  Some of the ones we use for glass annealing ovens and raku ceramic kilns are of the type that are only stable to about 1800 o F.   But for high fire kilns, we may need to fire to between 2700-2800 o F depending on the speed at which we reach end points of around cone 10 or so.  Then different types of RCF is used. 

And every time any of these kilns, high or low fire, are loaded and unloaded, the sunlight will reveal the fibers in the air.  They get on the sleeves of the people brushing against them. And that's why I get so exercised about this application. I think it is just plain wrong.


In a message dated 10/14/2012 11:49:43 AM Eastern Daylight Time, JRBristol**At_Symbol_Here**DOW.COM writes:

As a word of caution, it is important to keep in mind that there are many furnace units out there being bought and sold USED by universities and companies.  In most cases you do not know the history of the equipment.  With this material, any temperatures above 1800 degrees F (around 980 degrees C) will start to degrade the insulating material, making it more friable.  It is important to inspect (and replace if necessary) the insulating material when purchasing a used piece of equipment, but also be diligent in keeping good usage and inspection records with any of these units (if purchased new or used).


Best Regards,


Previous post   |  Top of Page   |   Next post

The content of this page reflects the personal opinion(s) of the author(s) only, not the American Chemical Society, ILPI, Safety Emporium, or any other party. Use of any information on this page is at the reader's own risk. Unauthorized reproduction of these materials is prohibited. Send questions/comments about the archive to
The maintenance and hosting of the DCHAS-L archive is provided through the generous support of Safety Emporium.