Is it practical to combine a heat-treating oven and a pottery kiln into one?

• https://www.reddit.com/r/knifemaking/comments/1ac4a2a/kiln_for_heat_treat/
• https://www.reddit.com/r/Pottery/comments/yspj1n/would_a_heat_treating_oven_be_able_to_fire/
• https://www.youtube.com/watch?v=BNDpxTuxqIw