Clay-graphite Crucible

الوصف

1, graphite crucible, most avoid is wet, it must be stored in a dry indoor place, or the gallows, dry and ventilated, it is forbidden to be affected with damp be affected with damp, shall not be placed in stone brick floor wet place, in order to avoid be affected with damp be affected with damp, use easy to burst.
2, each crucible before use must be in drying equipment or to preheat baking furnace, especially be affected with damp be affected with damp crucible (unused should be as be affected with damp be affected with damp crucible crucible) need to be baked before use. Baking temperature from low temperature below **0 ℃, the temperature is not higher than *0 ℃ per hour the speed of the oven to **0 ℃, insulation around eight hours, can dry, put the crucible on stove to put at least one class or more, and often turn around and change direction, crucible wall feels hot.
3, the first furnace melting time than normal melting furnace at least twice as much time, so as to avoid heating up too fast caused crucible containing crack, so that a fire was cracked.