Roots Vacuum Pump for Metallurgy Industry

Metallurgy is the process of extracting metals or metal compounds from minerals and using various processing methods to make metals into metallic materials with certain properties.

The metallurgical industry refers to the industrial sector that mines, selects, sinters metal ores, smelts them, and processes them into metal materials.

Since the establishment and development of the metallurgical industry, people have been exploring various process methods to reduce the influence of atmospheric environment and impurities on the smelting of metal materials, but this problem has not been fundamentally solved until the emergence of vacuum technology.

This article introduces the application of roots vacuum pump in metallurgical industry.  

Roots vacuum pumps are widely used in metallurgical industry, such as vacuum distillation, vacuum degassing, vacuum sintering, vacuum heat treatment, etc.  

Vacuum metallurgy is a metallurgical operation performed under sub-standard atmospheric pressure conditions. It can realize metallurgical processes that cannot be carried out in the atmosphere, prevent metal oxidation, separate substances with different boiling points, remove gases or impurities in metals, enhance the deoxidation capacity of carbon in metals, and improve the quality of metals and alloys.

Vacuum metallurgy is generally used for metal smelting, refining, casting and heat treatment. With the rapid development of cutting-edge science and technology, vacuum metallurgy is increasingly widely used in the smelting of rare metals, steel and special alloys.  

 

Roots Vacuum Pump for Metallurgy Industry

  1. Vacuum treatment of molten steel    

The use of vacuum treatment technology to improve the quality of steel has a long history, and it has now developed to a scale of hundreds of tons each time. The commonly used methods of vacuum treatment of molten steel are as follows:

  • molten steel barrel processing method

  • molten steel column processing method

  • vacuum ingot casting

  • lifting processing method

  • circulating processing method

  • industrial induction refining.  

 

  1. Vacuum induction furnace  

Vacuum induction furnace is an important equipment in vacuum smelting. There is a problem of vacuum sintering in the smelting process of products with or without cutting. The purpose of sintering is to sinter the desired shaped billet into a preform for hot forging, and to ensure good forgeability and ductility structure to avoid defects during hot forging. Vacuum smelting furnace is mainly used for smelting precision alloys, electromagnetic materials, alloy steel and high temperature materials.  

 

  1. Vacuum arc furnace  

Smelting in vacuum electric arc furnace and vacuum induction furnace is two aspects of vacuum metallurgy developing at the same time. From the metallurgical aspect, smelting in vacuum induction furnace is relatively perfect. Because it facilitates alloying, it is possible to obtain relatively uniform fine-grained ingots. However, due to the lack of suitable ceramic materials, and the contact between the metal and the ceramic may lead to defects such as an increase in the oxygen content of the metal. This make another smelting method - vacuum arc furnace developed in parallel and vigorously.  

 

  1. Electron beam melting furnace  

The electron beam melting furnace mainly uses the huge heat energy emitted by the electron beam as the heat source for smelting or alloy smelting. It has the same function as vacuum induction furnace and vacuum arc furnace. Due to the high price of smelting, it is only used for the smelting of refractory metals, active metals or alloys. Most of the general metals are smelted in other vacuum furnaces. For special occasions that require high temperature and strictly prevent pollution, electron beam furnaces are sometimes used to melt, refine and cast ingots, and the effect is very good.

 

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