Mini Charcoal Furnace

Step 6 Removing furnace frame

This is a very important thing to remember: PATIENCE let the refractory dry don't be hasty to remove the cover or you will crack and break it, all your hard work will be for nothing.
Start taking the screws out and removing the sides of the furnace, you can use a chisel or such but don't wedge and pull it against the furnace. 
The cardboard can be taken out with one finger, once it is wet it wont stick.
All the scrap you can throw away or use to make another furnace.

Comments

[g.petinati]

Regular portland cement takes almost a month to cure completely. Refractory cement cures at a considerably shorter time, but let it cure for the time indicated on the package (or at least a week) before you remove the frame. This may prevent the concrete from cracking.

After 2 or 3 hours from the pouring of the concrete, put a damp cloth over the top of the furnace. Keep it wet the whole time and protect it from wind, wich will dry the concrete. If the concrete dries it'll be a lot weaker.

Congrats for the great instructable.