Here it is all finished up
Figured I'd start a build thread on my new wax burnout & holding kiln for lost wax ceramic shell. I am using firebricks that I found at a Lowes. They were $2.56 a brick and are about 9x4," rated at 3000F. I needed 22 in total. What I did was use my diamond saw which I set to about 22.5 degrees and cut the edges off the bricks so they would fit into an octagon. I must have been slightly off on the angle because the bricks fit together into a 9 sided shape which turned out to be perfect. It has a roughly 10" internal diameter and a 12" external diameter. This will fit into my metal furnace shell of about 15" with space to wrap my ceramic blanket around it.
I started with a 40 gallon water heater a few years ago which I used to make my main furnace, basically I was left with a cutout of sheet metal that I welded back together to make a cylinder that makes up the shell of my new burnout furnace. The 3 inch diameter tube I used for the tuyere was left over from the inside of the water heater. See that thread here if interested: http://www.alloyavenue.com/vb/showth...e+zapins+build
I welded up a frame to support the furnace and have a place to rest the lid and other things I'll need. Not terribly pretty but oh well. Nice and rigid.
Here are the bricks in the process of cutting them.
Here are all the bricks cut and stacked next to the furnace shell. The idea is to stack a full length 9" brick onto a brick cut in half to give about 13 inches in height of furnace when done.
Here are the bricks stacked and wrapped in wire to keep them together.
This is what the inside of the furnace looks like
I welded up a square frame of L shaped steel to act as the lid. I'll attach it to a lever that will help me open the furnace later on.
More pics to come soon!