Home built Heat Treating Oven

[DIYSwede]

-Thank you for a well made video! Nicely presented considerations and executions.
Also, thanks for the crucial warning regarding the dust produced and the necessity for a face mask.

Being in a "Furnace-planning mode" myself, I've just got a few tips:

1) Blocks can be soaked in water before cutting, (temporarily) keeping the free dust down.

2) Kanthal A-1 wire has higher temp, longer life, (higher prize) but it also assumes:

3) Using the "26" type of blocks is absolutely recommended, as their alumina content is higher than lower grades
(which can be seen from the Kanthal Handbook
https://www.kanthal.com/globalassets...41-b-eng.pdf):



4) As they also simply say: "Water glass as a binder in cements must be avoided."

I guess they mean avoided entirely in the oven, as the fumes seems to deteriorate the Kanthal wire over time.
Which really is a PITA, as water glass/ sodium silicate is convenient, readily available and cheap.

Just my 2 cents, and YMMV.
Eagerly awaiting your next project videos!

Johan