公开(公告)号：US20230175087A1

公开(公告)日：2023-06-08

申请号：US17922236

申请日：2021-03-02

Applicant: SMS group GmbH

Inventor： Jochen SCHLÜTER ,  Ralf NÖRTHEMANN ,  Thomas HENKEL ,  Paul TOCKERT

IPC: C21B13/12 ,  C21B13/00 ,  C21B5/04

CPC classification number: C21B13/12 ,  C21B13/008 ,  C21B5/04

Abstract: A method for producing liquid pig iron comprises: i) providing a DRI product with an iron content of at least 75.0 wt. %, a carbon content of at least 0.10 wt. % and a content of acidic and basic slag components, comprising CaO, SiO2, MgO and Al2O3 of max. 15.0 wt. %; ii) supplying the DRI product, adding slag formers, into an electrically operated smelting unit; iii) optionally supplying further iron and/or carbon components into the electrically operated smelting unit; iv) smelting the DRI product and optionally the further iron and/or carbon components in the presence of the slag formers, so that a liquid pig iron phase and a liquid slag phase are formed; v) adjusting the slag phase such that it has a basicity of (CaO+MgO/SiO2) from 0.95 to 1.5; vi) tapping the liquid pig iron phase; and vii) tapping and granulating the slag phase.