Abstract
An increase in the consumer market for ferrous metallurgy products sets high requirements for finish product. The important criteria is deep cleaning of metal from non-metallic impurities and dissolved gases. To meet these requirements, RH-type vacuum degassing units are widely used at modern metallurgical plants. These vacuum units have shown high efficiency in comparison with other types of vacuum equipment in producing such steels as autobody steel, pipe steel and others. In the world industrial practice, RH-type vacuum units come out on top in ladle metal processing, leaving the ladle furnace unit only with the function of heating and deep desulfurization in the production of high-quality steels. So, the study of the processes occurring during the vacuum processing of metal, as well as work on increasing the durability of the lining of the evacuator and reducing non-metallic inclusions that enter the metal from the lining, is highly relevant. This paper discusses the issues of metal contamination due to wear of the lining of the evacuator, identifies the zones of stagnation of metal in the steel-pouring ladle, and also presents a diagram of the modernization of the vacuum degasser RH-type.
Keywords
Reverse, stagnant zones, circulation, vacuum degassing, modeling, non-metallic inclusions.