How to clean the graphite crucible?
Dec 05, 2023
As an important experimental equipment, graphite crucible plays an important role in experimental operation. However, after use, it needs to be thoroughly cleaned so that it can continue to be used. Here are some ways to clean the graphite crucible:
1. Use pickling: First, soak the graphite crucible in concentrated nitric acid, which can help remove some organic matter. Next, the graphite crucible is soaked in concentrated hydrofluoric acid, which helps remove some dirt and metal oxides from the surface. Finally, put the graphite crucible into pure water and clean it repeatedly until it is completely cleaned.
2. Flame drying: Put the graphite crucible in the oven and bake it dry at high temperature. This helps to remove moisture and organic scale from the surface of the graphite crucible, as well as stains covering the boiler and gas stove.
3. Use mechanical methods to clean: some graphite crucible slightly damaged can be used mechanical methods, such as the use of graphite crucible cleaning machine cleaning, graphite crucible can be tied with glass ribbon or just support the graphite crucible at the bottom, as long as it is placed in a large container for mechanical repeated cleaning.
Through these methods, we can thoroughly clean the graphite crucible and prepare it for the next experiment. At the same time, we also need to pay attention to do a good job of protection to avoid acid or hydrofluoric acid splashing on their own bodies, and to prevent excessive heating of the graphite crucible leading to rupture.
