1, dry burning: Under normal circumstances, the bottom of the pot will definitely turn red after dry burning, especially the iron pot. Iron pots are mostly made of cast iron, with a melting point of 1 145 to 1250 degrees Celsius. The temperature of all kinds of domestic gas stoves is 800 degrees Celsius, so iron pots will burn red and basically will not melt.

2. aluminum pot: The melting point of aluminum is only 660 degrees. If the dry burning time is long, it will burn and produce alumina.