公开(公告)号：US20190002996A1

公开(公告)日：2019-01-03

申请号：US15748669

申请日：2016-08-03

Applicant: SMS GROUP S.P.A.

Inventor： MAURO MILOCCO ,  FEDERICO MAZZARINI ,  FABIO TRIGATTI

IPC: C21C7/10

Abstract: The invention relates to a plant for vacuum degassing liquid steel, comprising: at least one vacuum chamber 2, suitable to temporarily receive liquid steel inside it; a vacuum generation system 10, connected to said at least one vacuum chamber 2 via an intake duct 20. The vacuum generation system 10 comprises at least two compression stages connected together in series, of which: a first compression stage 11 works closer to the aforesaid at least one vacuum chamber and is composed of one or more screw pumps 110; and a second compression stage 12 works farther with respect to said at least one vacuum chamber 2 to bring the gases at least to atmospheric pressure and is composed of one or more liquid ring pumps 120.