Process for the production of pig iron and sponge iron

US5238487A · kind A · utility

Assignee

• Deutsche Voest-Alpine Industrieanlagenbau GmbH · DE

Inventors

• Rolf Hauk · Düsseldorf, DE
• Werner Kepplinger · Linz, AT

Key dates

• Filing date: Nov 27, 1991
• Grant date: Aug 24, 1993
• Expiry date: Nov 27, 2011

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P10/134
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A process for producing pig iron is described, which contains a reducing shaft furnace 1 and a melting gasifier 2. The sponge iron produced from iron ores in the reducing shaft furnace is supplied to the melting gasifier and converted there into a pig iron melt. The gas produced in the melting gasifier is supplied directly via a line 4 as reducing gas to the reducing shaft furnace. The blast furnace gas passing out of the reducing shaft furnace, after traversing a CO.sub.2 scrubber 6, is at least partly heated in a heat exchanger to 200.degree. to 500.degree. C. and passed to a partial combustion plant 13 where, accompanied by the addition of oxygen, the gas is heated to the necessary reducing temperature.