Method for producing liquid pig iron or steel fabricated materials and installation for implementing said method

US6264725A · kind A · utility

Assignee

• Voest-Alpine Industrieanlagenbau GmbH & Co. · AT

Inventors

• Josef Stockinger · Munich, DE
• Michael Nagl · Reichenau, AT

Key dates

• Filing date: Apr 7, 1999
• Grant date: Jul 24, 2001
• Expiry date: Apr 7, 2019

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S75/961
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

According to a process for producing pig iron (10) from fine-particulate iron oxide carriers and lumpy iron-containing material in a meltdown gasifying zone (9) of a melter gasifier (3), the iron-containing material is melted in a bed (13) formed of solid carbon carriers, under the supply of carbon-containing material and oxygen-containing gas while simultaneously forming a reducing gas. Fine-particulate iron-oxide carriers, such as iron-containing fine ore and ore dust and oxidic iron fine dust, are introduced into a reducing gas stream leaving the melter gasifier (3), and the reducing gas is separated from the fine-particulate material formed thereby. The separated fine-particulate material is introduced into the meltdown gasifying zone (9) via a dust recirculation line (26, 27, 28, 29) and through a dust burner (30), and the reducing gas is used for reducing iron-oxide-containing material. To be able to charge large amounts of fine ore or ore dust in this process, the separated fine-particulate material in the dust recirculation line (26 to 29) is conveyed via a fluidized bed sluice (25) formed by the separated fine-particulate material and by reducing gas to the dust burner (30…