What are the choices of is used for refining, and usually the temperature is extremely high. Therefore, the raw materials for manufacturing should have high refractory resistance and have a strong high temperature resistance coefficient. There are also sufficient strength of ingredients. If the impact of high temperature, etc. during the smelting process, there will be wear. Therefore, if the strength of the raw material is not high, it is likely that the more waves will be used, and the more toughness will be lacking.

 The contraction coefficient must be small, and the temperature changes sharply without deformation and breaks. There must be not to afford the chemical response with the melted metal in the selection of materials, and the high temperature resistance of chemical metals should be high. Loss. When the melting metal is demanded at high temperature, the selection of  should ensure that chemical stability at high temperature should be learned. It can be seen that there are a lot of attention to the selection of materials, and different materials are used. For example: molten aluminum and aluminum alloy should be used.

Correct instructions for the use of graphite pans:

When adding feeding, the graphite is not squeezed too tightly to prevent the metal from swelling and bloating. The service life of graphite 命 is related to usage. Avoid spraying directly on the fans to the pupae, and the ingredients should be oxidized for short -lived raw materials. Dry the dry place after use, avoid rainwater invasion; you must be baked slowly to 500 degrees Celsius before use. When removing the metal fuse, it is best to use a spoon to scoop out, try to use calipers as little as possible. If the tools such as calipers should be consistent with the shape of the cricket to avoid excessive local stress and shorten the service life. In addition, everyone must be recommended here that graphite 坩埚 is best used continuously, so as to better play its high performance. If it is not used for a long time, it may affect the performance of graphite.