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jrgpots

Member Since 15 Mar 2013
Offline Last Active Yesterday, 10:51 PM
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Topics I've Started

Hard Brick Vs Ifb

25 October 2014 - 05:05 PM

I have found a supply of supper duty hard brick which are 9x6x3 for $0.50 each. I was told they are stable up to 8,000 degree F. So how long would a 12-14 cubic ft made of these hard bricks take to fire and cooldown without IFB lining? How much more gas would it take to fire?

If I put IFB liner, should it be 2 1/2 or 4 1/2 inches thick?

If I use kaowool for the liner, should I use 1 or 2 inches?

Or sould I not bother with the hard brick?

Jed

Icing For Ceramic Gingerbread

05 October 2014 - 03:18 PM

I am planning the make gingerbread houses from Laguna electric brown cone 6 clay body. I want to use a white slip for the icing. The slip needs to be thicker than normal,,,,I think.

Any suggestions?

Jed

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?

Jed

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.

Jed

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?

Jed