Process for gaining electric energy in addition to producing molten pig iron and an arrangement for carrying out the process

US4861369A · kind A · utility

Assignee

• Korf Engineering GmbH · DE

Inventors

• Ludwig von Bogdandy · Linz, AT
• Werner Kepplinger · Linz, AT
• Kurt Stift · Leoben, AT
• Gero Papst · Kaarst, DE
• Rolf Hauk · Düsseldorf, DE

Key dates

• Filing date: Nov 25, 1987
• Grant date: Aug 29, 1989
• Expiry date: Nov 25, 2007

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S75/958
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

To gain electric energy in addition to producing molten pig iron, from lumpy iron ore and solid fuels, by using a direct reduction zone for the reduction of the iron ore to sponge iron and a meltdown-gasifying zone for the production of molten pig iron, carbon carriers are used in, and oxygen-containing gases are supplied to, the meltdown-gasifying zone. The reduction gas forming is fed into the direct reduction zone. The reduction gas reacted there is supplied as top gas to a power generation plant including a turbine. In order to adapt the power generation to the power consumption by simultaneously avoiding any influence on the metallurgical conditions at the production of pig iron and its further processing, the charge of carbon carriers into the meltdown-gasifying zone is varied as a function of the gas consumption of the power generation plant in a manner that, with a higher gas consumption, the volatile constituents of the charge are increased and the C.sub.fix charge is reduced and, with a lower gas consumption, it is proceeded the other way round, while keeping the amount and composition of the pig iron produced substantially constant.