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Member Since 15 Mar 2013
Offline Last Active Yesterday, 12:24 AM

Topics I've Started

Adding Refractory Insulation To Outside Of 2.5 Inch Kiln Wall

25 September 2014 - 12:18 AM

My gas conversion kiln has a 2.5 inch wall so I'm burning a lot of extra gas because of the thin walls. I want to make an outer insulating layer that would be 3-4 inch thick to improve firing, slow cooling by reducing heat loss.

I have fire clay and perlite. Do I need to add mullite or a calcium aluminate cement; or can I use a different type cement in my homemade castable?

I have read over and over again not to use portland cement because it spalls and and sometimes explodes. Is this still true for the outer insulating layer?

Kast-o-lyte costs $116 for 55lb bag mullite is slightly less.

Any suggestions?


Stacking Help For Reduction Gas Firing

15 September 2014 - 03:15 PM

I am looking for literature on how stack gas kilns for even reduction firing. I need education about how to use bag walls and stacking to direct the flame through a kiln.


Learning Reduction In My Conversion Kiln

13 September 2014 - 01:00 AM

I unloaded my kiln conversion kiln this AM. I still have lot to learn, but I wanted to show off a little.

This is my first piece using my homemade O2 sensor to control reduction.

What do you think?


Oxymeter Reading During Reduction

11 September 2014 - 02:52 PM

I am 3 hours into firing my small gas conversion. My homemade oxymeter is reading 27.1 mvolts. The damper is open 1 inch and there is the smell of reduction in the air. There is an orange glow in the kiln.

What range of readings (in mvolts) represents light,medium, or heavy reduction?


Well Taken Care Of Alpinehf24 Updraft

02 September 2014 - 07:38 PM

There is an Alpine HF24 updraft gas kiln with controller for sale not too far from my area.  The serial Number is 95115,  I think it may mean that it was built in 1995. It is IFB 2800 with power burners.  There is no fiber blanket material.  Wals are 7-8 in thick.  see pics.  The furniture is not included.


What would be a good price on this model KIln?