This video popped up in my subscription box and I thought it would be worth sharing on here. Haven't been able to find much about it's operating temperature or how long something like this would last but it sure is interesting making some refractory carbon out of bread. Seems like a bit of a strange one as in my head the carbon should burn away but maybe the reduction firing first changes something about the carbon.
Very crude ideas in the video but nothing like trying it out for yourself.
Bread kilns here I come