How to melt molybdenum bars?
Molybdenum is a high melting point metal with a melting point of about 2623 degrees Celsius. Therefore, the smelting process of molybdenum needs to be carried out in a high-temperature furnace. The following is the smelting process of molybdenum bars:

1. Raw material preparation: First, you need to prepare the raw materials of molybdenum, generally ammonium molybdate or molybdenum oxide. These raw materials are generally in powder form and need to be processed by processes such as crushing and screening to ensure that their particle size is uniform.

2. Ingredients and alloy blending: During the smelting process, a certain proportion of other metal raw materials, such as iron, copper, nickel, etc., are usually added to the raw materials to prepare molybdenum alloys that meet specific needs. These raw materials need to be accurately weighed and mixed in strict accordance with the ratio requirements.

3. Pre-treatment of refining materials: Before the raw materials are put into the smelting furnace, they usually need to be pre-treated. For example, for ammonium molybdate raw materials, drying treatment may be required to remove moisture and impurities; for molybdenum oxide raw materials, reduction treatment may be required to reduce them to metallic molybdenum.

4. Smelting operation: The pre-treated raw materials are put into a high-temperature smelting furnace for smelting. The temperature in the smelting furnace usually needs to reach or even exceed the melting point of molybdenum to ensure its complete melting. A certain amount of flux may need to be added to the furnace to promote the melting and mixing reaction of the raw materials.

5. Refining process: After the raw materials are melted, certain refining operations are usually required to remove impurities and gases. This may include vacuum treatment, gas purging and other operations to ensure that the final smelted molybdenum alloy is of good quality.

6. Casting molding: The molybdenum alloy melt after smelting and refining needs to be quickly molded to avoid defects such as segregation and pores during the cooling process. Molding processes such as water-cooled casting or vacuum plasma investment casting are usually used.

In general, the smelting process of molybdenum bars requires a high-temperature furnace, and the raw material ratio, furnace temperature and smelting operation need to be strictly controlled to ensure that the final smelted molybdenum alloy has a good chemical composition and organizational structure.