If there is a hole in the iron pot, you can find a piece of broken casserole, grind it into fine powder, make it into thick mud with egg white, make it into a sand mud cake slightly larger than the hole in the pot, and then burn it on the fire for about two minutes, and the sand mud will be integrated with the iron pot.

Or use lard mud, pound it into mud and fill it in the hole. The more it burns, the more it burns.