The wool surface is lightly sprayed with colloidal silica to stabilize the exposed fibers and operators wear simple particulate masks when entering or leaving the oven, and these are compliant with regulatory guidelines. I can tell you with certainty that industrial walk in ovens are either IFB or folded/pleated exposed wool hung on metallic hangers. IMO opinion the health risk is exaggerated if you just take sensible precaution.
It's too economical and wonderful of a refractory material to unnecessarily discount it's use. If it concerns you the so called safe wool should be just fine for the modest refractory demands of a resistive electric burn out kiln. Patent 5,351,632) has literally turned burn-off oven design upside down by introducing the heat into the top of the oven and removing cooler gases and combustible vapor from the bottom. If you work with them daily, greater care is required. Burn-Off Oven Technical Information Top-Down Heating for Burn-Off Ovens This patented technology (U.S. Like everything these risks tend to be related to exposure time. Clean the bulk of IFB dust with light brooming and only vacuum the minimum amount.that makes particles become airborne. Inside will deposit dust all over your shop which becomes easily air borne. If you machine them with power equipment, do so outside. Wear gloves, particulate mask, eye protection, and wash your hands and clothes after working with them.
They create a lot of dust when they are cut or machined. The alumina silicates in IFB dust are every bit as friable and carcinogenic as wool but people don't hesitate to handle them. The wool surface is lightly sprayed with colloidal silica to stabilize the exposed fibers and operators wear simple particulate masks when entering or leaving the oven, and these are compliant with regulatory guidelines. Burn Off and Paint Stripping Ovens 1.72 width x 108 H Blasdel Electric Infrared Oven Booster Design Berlin, WI Blasdel Enterprises 36 width x 33 H x 21.
The top could be removed by hand or you could have an overhead truss to hand it on.Ĭlick to expand.IMO opinion the health risk is exaggerated if you just take sensible precaution. It could be a circular base with a wool lined garbage can for a deep lift off lid, or the base could be rectangular (or whatever) and have a wire mesh armature/structure lined with wool. Why not have a hybrid with a shallow stationary IFB base that houses the coil and then a can or wire caged lined with wool to provide the additional furnace volume? The allure of IFB for a resistance furnace is the ease of carving shelve for housing the heating elements. The issue with a wool is safely hanging the coils to protect them from damage and you from electrical shock. Whatever that limit turns out to be I can guarantee the terminal volume/temperature would be larger if you used ceramic wool instead of IFB, and the build would be much less expensive and lighter, like a top hat lift off style furnace. The larger volume will always make for slower heating and there will be a limit when the heat loss through the wall equals 2400w. How often will you use the kiln and how thick of a wall of K23 are you contemplating?
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