公开(公告)号：US20250146753A1

公开(公告)日：2025-05-08

申请号：US18684231

申请日：2022-08-17

Applicant: SMS group GmbH

Inventor： Hans Ferkel ,  Markus Reifferscheid ,  Thomas Henkel ,  Ingo Schuster

IPC: F27B3/28 ,  F27D19/00 ,  F27D21/00

Abstract: The invention relates to an electric arc furnace having a furnace vessel with at least one electrode and a voltage supply connected to the at least one electrode, wherein: the furnace vessel has a lower vessel for receiving a melt and a cover for placing onto the lower vessel; the lower vessel has a tapping channel; and the cover has a retaining means for fastening the at least one electrode; the electric arc furnace is designed to determine a nitrogen content in the melt; and/or the electric arc furnace is designed to reduce the nitrogen content in the melt to less than or equal to 55 ppm, preferably to less than or equal to 45 ppm and particularly preferably to less than or equal to 35 ppm. The invention further relates to an operating method and to a use of an electric arc furnace.

公开(公告)号：US11549156B2

公开(公告)日：2023-01-10

申请号：US16978378

申请日：2019-03-05

Applicant: SMS GROUP GMBH

Inventor： Peter Starke ,  Andreas Schüring ,  Thomas Henkel ,  Hans-Jürgen Odenthal

IPC: C21C5/04 ,  F27B3/08 ,  F27B3/22 ,  F27D17/00

Abstract: An improved apparatus for producing steel, including a lower furnace, an annular, water-cooled, fireproof lined cylindrical upper furnace, on which an upwardly closing conically tapering hat having openings can be placed. The smelting assembly is configured for the operational mode without melt flow and the operational mode with melt flow. To this end, at least one opening is provided in the conical furnace cover, through which opening at least one top lance can be introduced into the upper furnace. A plurality of sidewall injectors radially rotate around the cylindrical upper furnace in such a way that in a working position, the top lance and the sidewall injectors are directed onto a smelt level of a molten mass located in the lower furnace for refining.

公开(公告)号：US20180340734A1

公开(公告)日：2018-11-29

申请号：US15952325

申请日：2018-04-13

Applicant: SMS Group GmbH

Inventor： Guido Kleinschmidt ,  Jan Bader ,  Klaus Schmale ,  Rolf Best ,  Alexander Bergs ,  Thomas Henkel ,  Detlef Strieder ,  Peter Starke ,  Markus Ertl ,  Juergen Kunze

IPC: F27B3/08 ,  H05B7/109 ,  H05B7/14

Abstract: The invention relates to an electric arc furnace and a method for operating same. The electric arc furnace comprises a lower vessel and a lid 120 placed on said lower vessel. The lower vessel has a tapping device for tapping molten metal. At least one electrode protrudes through the lid into the interior of the electric arc furnace, said electrode being held by an electrode holding device. A supply voltage device 150 is provided for supplying an electric direct current or alternating current to the electrode 130. The aim of the invention is to allow a continuous operation of the electric arc furnace. This is achieved in that the electrode holding device has an electrode adjusting device for adjusting the electrode dependent on the wear of the electrode and an electrode nippling device for nippling the electrode during the operation of the electric arc furnace. According to the invention, both the electrode adjusting device as well s the electrode nippling device 144 operate when the supply voltage of the electrode is switched on.