An epiphany --- Put on your seat belt. This is the best idea I've had in several days.
Dead Electrical Pottery Kilns --- These kilns are typically made of alumina ceramic bricks that can withstand 1800 C or above. Dead ones that require hundreds worth of electrical upgrades are sometimes given away. They could be taken apart for the brick, or smaller ones could be used as a riser by stacking a couple together. A large one turned upside down could form a bell. The lids are the perfect material to place under the burn floor, to prevent heat flow to wood beneath. These bricks are easily cut. Pottery supply stores carry suitable clay to seal joints. Five years ago, I paid to dump one the size of a refrigerator. That was dumb. We have a few pottery clubs. I'm going to call them and offer to become the dead kiln disposal guy. Kilns are heavy and awkward. Most potters are older.
This is the type of kiln that I'm referring to. There are millions of these things, many requiring more repair than they are worth. ---
http://www.ebay.com/itm/CRESS-FTX23P-FTX23-P-Ceramic-Clay-Furnace-Electric-POTTERY-KILN-Stand-/321312040123
This changes my plans for a cob oven, rocket forge and a few other things. Many can use a kiln or parts from one.
Here are my tiles salvaged from a drainage job.---
https://permies.com/t/31726/green-building/Dale-drainage-customer-house-pictures --- I got lots of really nice tile that I'm hauling to the farm to use in the cool end of several RMH wood burners. There are 51 regular tiles, 3 octagonal ones, 5 corners, 2 damaged corners, several odd bits and one T-shape.