Why is graphite crucible smelting reducing properties of the burden is particularly vulnerable to corrosion?
Temperature, high temperature resistance of graphite crucible in general, is not easy to happen, but it is possible to make mistakes. May the general errors include: (a) graphite crucible is exposed in the atmosphere at high temperature (b) cooling too fast or quench.
Corrosion, the nature of the general graphite is extremely stable, it is difficult to corrosion, but some special organic substances, such as resin at low temperatures, will be able to graphite erosion, making the graphite due to mechanical strength and damage. And some oxygenated compounds, too.
Environment, whether it is a vacuum, and if there is a lot of oxygen or air in the environment, it is very dangerous and deadly. If it is a vacuum device, it must leak check and reach a good vacuum.
