Process and apparatus for producing liquid pig iron or liquid primary steel products

US9139884B2 · kind B2 · utility

Assignee

• Primetals Technologies Austria GmbH · AT

Inventors

• Georg Aichinger · Ansfelden, AT
• Thomas Eder · Traun, AT
• Hado Heckmann · Linz, AT
• Robert Millner · Loosdorf, AT
• Johannes Schenk · Linz, AT
• Martin Schmidt · Gmunden, AT
• Kurt Wieder · Linz, AT
• Johann Wurm · Linz, AT

Key dates

• Filing date: Jan 30, 2009
• Grant date: Sep 22, 2015
• Expiry date: Dec 27, 2030

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P10/25
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A process and an apparatus for producing liquid pig iron or liquid primary steel products from charge materials formed by iron ores and additions. The charge materials are subjected to a further reduction in a reducing zone (1) and are then fed to a smelting zone or a smelting unit (2), in particular a fusion gasifier, for smelting with the addition of carbon carriers and oxygen-containing gas to form a fixed bed. A CO- and H2-containing reduction gas is formed, which gas is introduced into the reducing zone converted there and drawn off as top gas. The hot top gas, laden with solid matter, after separation of the solids, is subjected at least to a dry coarse separation and at least parts of the hot solids segregated by the separation are returned into the smelting zone or the smelting unit (2) or the reducing unit (1). In addition, the top gas is treated in a further fine separation stage (13A).