Search the Community
Showing results for tags 'refractory'.
Found 3 results
Hi all, I'm planning on building a hobby kiln for my partner, and am in the process of choosing refractory materials and kanthal wire for the heating element. Was hoping I could get some advice from anybody who knows about these things. I want the kiln to be light weight and very efficient. I'd like to use ceramic fibre board as an inner layer of insulation (rated to 1400 C / 2550 F), and calcium silicate board as a secondary layer (rated to 1000 C / 1830 F). The ceramic fibre board is very expensive compared to the calcium silicate board, but i can't only use the calcium silicate board as it's only rated to 1000 C / 1830 F. So my idea is to cement the two boards together, with the calcium silicate board on the outside, so that it won't exceed 1000 C / 1830 F. I'm wondering how thick the ceramic fibre board needs to be such that the calcium silicate doesn't reach that temperature. We'll be firing the kiln to about 1280 C / 2340 F. My other question is about kanthal wire for the heating elements. I'm wondering what gauge of wire I need. The kiln will be about 40 litres / 1.3 cubic feet. I want it to get up to 1280 C / 2340 F. Based on similar designs that I've seen online, it looks like I'd need it run at about 3600 watts. I'm wondering what gauge kanthal wire I should use for a well-insulated kiln that meets these specs. If anyone has any idea about either of these questions I'd really appreciate your thoughts! P.S. I'm aware of the health risks of working with fibreboard, and will be using the proper PPE and precautions.
I have been reading a bit about making my own IFB to start building my own little kilns. I know it is probably not cost effective but I just want to do it anyway for my own enjoyment. I was working last night in some 3D software with a 9/4.5/3 brick shape trying to work out how to layout bricks and how many I will need. I then realised that I know nothing about brick laying There must be a good way to stack bricks and build up a wall. Anybody got some links to kiln building / brick laying? Going to go to the library tomorrow to see if I can't find a good book on kiln building but thought I would ask here. Any information is good even if it is only slightly related. " I want it all "