In the aluminum casting process, the melting equipment is important, but different factories has different demand. Some small facroty uncessary need the melting furnace or any professional machine due to the factory size, labor cost and order. At this time, they can choose the graphite crucible to fullfill their work demand.
Graphite crucibles can be roughly divided into four categories.
1.Pure graphite crucible. The carbon content is generally greater than 99.9%, and it is made of pure artificial graphite material. It is only recommended to use carefully for electric furnaces.
2.Clay graphite crucible. It is made of natural graphite powder mixed with clay and other oxidation-resistant materials. It is suitable for factories with low labor cost and low operating rate.
3.Silicon carbide graphite crucible. It is made of natural graphite powder, silicon carbide, aluminum oxide, etc. and added with an anti-oxidation layer. Suitable for high temperature smelting, popular demand.
4.The silicon carbide graphite crucible is formed by isostatic pressing, and the crucible is pressed by an isostatic pressing machine. The service life is generally 2-4 times that of the rotary formed silicon carbide graphite crucible. It is the most suitable for aluminum and zinc oxide. Due to the high cost of isostatic pressing, there is generally no small crucible.
Then is the use of graphite crucible.
Instructions for use of graphite crucible (please read carefully before use):
1.The crucible is stored in a ventilated and dry environment to avoid being affected by moisture.
2. The crucible should be handled with care, it is strictly forbidden to drop and shake, and do not roll, so as not to damage the protective layer on the surface of the crucible.
3. Bake the crucible in advance before use. The baking temperature is gradually increased from low to high, and the crucible is constantly turned to allow it to be heated evenly, remove the moisture in the crucible, and gradually increase the preheating temperature to more than 500.
4. The crucible furnace should be matched with the crucible, the upper and lower and surrounding gaps should meet the requirements, and the furnace cover should not be pressed on the crucible body.
5. Avoid direct flame injection to the crucible body during use, and should be sprayed towards the crucible base.
6. When adding material, it should be added slowly, preferably crushed material.
7. The crucible tongs used for loading and unloading should be consistent with the shape of the crucible, so as not to damage the crucible.
8. It is best to use the crucible continuously, so as to better exert its high performance.
9. During the smelting process, the input amount of the agent must be controlled. Excessive use will reduce the service life of the crucible.
10. When using the crucible, rotate the crucible periodically to make it heat evenly and prolong the use.
11.Tap lightly when removing slag and coke from the inner and outer walls of the crucible to avoid damage to the crucible.
Post time: Sep-23-2023