Self-heating bag aluminum powder

Generally, the heating package of self-heating hot pot is composed of sodium carbonate, roasted diatomaceous earth, iron powder, aluminum powder, coke powder, activated carbon, salt, quicklime, etc.
Quicklime is added with water to produce slaked lime, which emits a lot of heat, which can raise the temperature of 1L of water by 13.78℃. Generally, the amount of water in the self-heating hot pot is a bottle of mineral water. It can heat up to more than 90°C in 20 seconds after encountering water, and a large amount of gas will be generated during the process. Improper operation may cause an explosion.

Main reaction principle: CaO + H2O = Ca(OH)2 + heat

Primary battery electrochemistry: activated carbon+metal powder+electrolyte——>heat

Principle of gas generation reaction: aluminum powder + strong alkali -> sodium metaaluminate + hydrogen

Aluminum powder strengthens alkali to release combustible gas and promotes heating effect