Can Molybdenum Crucible Be Used for Rare Earth Smelting?

Molybdenum crucible can be used for rare earth smelting and play an irreplaceable and important role in the rare earth industry. The following is a detailed description from multiple aspects:

  1. Advantages of molybdenum crucible in rare earth smelting

High temperature resistance:

molybdenum is as high as 2610℃. The molybdenum crucible can work at a high temperature of about 2000℃ for a long time. It can withstand the high temperature environment required in the rare earth smelting process and ensure the smooth progress of the smelting process.

Corrosion resistance:

Various chemical corrosions will occur during the rare earth smelting process. Molybdenum crucibles have excellent corrosion resistance and can resist the erosion of these chemical corrosions, extend the service life of the crucible and reduce production costs.

Good thermal conductivity:

Molybdenum crucible has good thermal conductivity, which can quickly transfer heat to rare earth raw materials and improve smelting efficiency. At the same time, good thermal conductivity can also ensure uniform temperature distribution inside the crucible, avoiding smelting problems caused by local overheating or overcooling.

High purity and stability:

Molybdenum crucibles are made of high-purity Mo-1 molybdenum powder with a purity of more than 99.95%. It has excellent chemical stability and will not react with rare earth metals, ensuring high-purity extraction of rare earth elements.

  1. Application scenarios of molybdenum crucible in rare earth smelting

Rare earth metal smelting:

Rare earth metal smelting is mostly carried out in a high-temperature, non-protective atmosphere. The electrolysis process must use refractory metal materials, such as tungsten as an electrode rod and molybdenum as a crucible.

Rare earth element extraction:

In the process of refining rare earth elements, extremely high requirements are placed on the container material. Molybdenum crucibles not only do not react with rare earth metals, but can also effectively resist the erosion of chemical substances, ensuring high-purity refining of rare earth elements.

Preparation of rare earth alloys and compounds:

In the application process of rare earth elements, molybdenum crucibles also play an important role, such as in the preparation of rare earth alloys and compounds.

  1. Specific performance of molybdenum crucible in rare earth smelting

Service life:

Although there will be some wear and tear during use, the relatively long service life of the molybdenum crucible (approximately 30 – 80 heats) reduces the frequency of replacement and helps reduce production costs.

Impact on the quality of rare earth products:

molybdenum crucibles, such as high purity, corrosion resistance, high temperature resistance and stability, ensure the stability and safety of rare earth elements during high-temperature smelting and separation, and improve the quality of rare earth products.

Key process equipment:

In rare earth smelting furnaces, molybdenum crucibles are indispensable core components. They not only carry rare earth raw materials, but also ensure the efficient extraction and purification of rare earth elements through their excellent performance.

  1. Improvement and development of molybdenum crucible in rare earth smelting

new molybdenum crucible:

In view of the defects of traditional molybdenum crucibles in the rare earth smelting process, such as the same axial structure design on the upper and lower parts resulting in the upper port being attenuated and consumed first while the lower part of the crucible still has bearing capacity, the new molybdenum crucible is a hollow cylindrical structure with an open upper end and a closed lower end, which greatly prolongs the attenuation consumption time of the crucible mouth and significantly improves the overall service life of the molybdenum crucible.

Application of coating technology:

In order to further improve the performance of the molybdenum crucible, an anti-oxidation coating, such as molybdenum carbide/nitride or ceramic coating, can be coated on its surface to isolate oxygen and slow down the oxidation rate.

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