Abstract

Among famous methods of secondary steelmaking, vacuum treatment steel directly in the ladle so called, ladle vacuum treatment plays big role, there are a lot of different variations of technological process, however, the widest spreading got vacuum treatment by VD methods (vacuum degassing) or VOD methods (vacuum oxygen decarburization). Using oxygen blowing simultaneously with vacuum treatment gives ability getting special low-carbon steel (electric steel, stainless steel, automobile-body sheet with ability of deep extract, etc.). At last time combine equipment VD/VOD or VD- ОВ (vacuum degassing - oxygen blowing) gets important spread. Comparative simplicity of construction and wide range of ladle vacuum units’ technological abilities promote of their wide spread – around 65% existing vacuum units are ladle type [1-3].