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jrgpots

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About jrgpots

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    The hands can express the soul

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  • Location
    Hurricane, Utah
  • Interests
    Working with clay recharges my batteries. I love exploring and "going down the path less traveled." New ideas, challenges, and projects catch my attention.

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  1. Could you create a crossdraft on the top of the chimney by placing a blower across the top creating a venturi effect....kind of like an airbrush. The rate of the blower could change the drawing of the chimney. Has anyone done this?
  2. I have about 140 of 10 1/2" x4" x 4", tongue and groove high silica btrick which were designed to go in the floor of blast furnace. I initially made a kiln using this brick as the outer layer and IFB as a liner. these bricks did not hold up to the thermal shock of repeated firing. Is there a use for these guys outside of a blast furnace? Jed
  3. Mine are from the Minnesota flat top you told me about 2-3 years ago in Fresno, CA. The kiln was built built in the late 80'S I think. They are ruff. Thanks.
  4. burner ports are on the back side and will be about 3 feet away from the back wall. There will be doors on the back side to open during firing, giving me more room as well as a windbreak. I can build with steel siding. Already have the cinder block walls. I can also put "temporary walls" (dry stacked) around the burners to form a windbreak. Jed P.S. as long as those post use witnessed cones to show how "Baked" they are, I'm fine with them
  5. I have limited space. So I have to plan my shed construction accordingly. I thought I would Build the shed Just a bit wider than the kiln's width. The side walls would be removable panels that I would remove while firing. They would then be rehung after the firing to protect the kiln from the weather. The support framing will be steel sucker pipe at the corner and steel framing studs where needed. Jed
  6. K26 IFB wall, no current fiber boards or sheet metal on the outside. I don't know about course or fine. sorry.
  7. all soft brick except around ports and chimney outflow. There is also 3" layer of fiber on top of this 20 cu ft gas fired downdraft. Jed
  8. 1. During a firing, how hot will the outside of the 9 inch walls of the kiln get if the kiln is fired to ^6 or ^10? 2. How close can the kiln be to a wall? Jed
  9. I normally extrude extrude stoneware. I also have had good success extruding Dixon scultping clay. I just wanted to try something different. Jed
  10. I would love to see any pictures of extruded colored clay. Any hollow extruded tubes using colored clay would be of great interest. Jed
  11. It could be mica or a borate sheet like leucite. Can you put some in a crucible and grind it?.. If it is a borate it will easily grind to a white powder which would melt and bubble if you heated it with a torch. If it is black when it is ground, there is a good chance it is mica. Don't burn it. A picture would help. Agree with it not being silver. jed
  12. At cone 6 it would not melt. It could give you a speckled clay body. John Baymore and Biglou have a thread about granite chunks in the clay body as well as in glaze. They were firing to cone 10-12 over days. Jonh Baymore still has a granite glaze on his gallery. cone 10 suggestion (given to me from John Baymore) granite dust 80 whiting 20 (He also suggested granite 70 and ash 30) If you want to get to cone 6 , I would start with the below recipe to begin testing. granite dust 67 whiting 17 3124 frit 16 Jed
  13. I remember hearing of a mine that hit a large seam of mica, iron disulfide. The mica dust aerosolized. Before it could be scrubbed from the air, the mine went up like a powder keg. A few years ago I ground up some mica, placed it in a crucible and set it on fire. The sulfur dioxide burned out, leaving black iron oxide. It was a cool experiment. Anyway, I'm curious how much can you add to glaze or clay body before you have a problem?
  14. On somewhat of a tangent, mother nature has excellent examples of heatwork. Granite and rhyolite have the same composition. The former is allowed to slowly cool (a controlled fire down and long soak over a few million years). It is able to form a beautiful lattice structure and large crystals. The latter is extruded in an eruption and has a rapid cooling. Its matrix is composed of finer grained crystals. Next tangent: quickly fill a large box with ping pong balls. After the box is full, apply a constant gentle vibration to the box. The balls will work their way into a matrix or lattice structure. This vibrational energy is analogous to heatwork. Thus you see my ranting. I really am just procrastinatng moving a few tons of gravel from my driveway to the backyard. Great thread, Jed
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