Operating a blast furnace with the injection of hot reducing gases

US4521246A · kind A · utility

Assignee

• Centre De Recherches Metallurgiques-Centrum Voor Research in De Metallurgie · BE

Inventors

• Nikolas G. Ponghis · Neuville-en-Condroz, BE
• Arthur G. Poos · Embourg, BE

Key dates

• Filing date: Sep 6, 1983
• Grant date: Jun 4, 1985
• Expiry date: Sep 6, 2003

Classification

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

Abstract

Hot reducing gases, mainly containing CO, H.sub.2, and optionally N.sub.2, as well as smaller quantities of H.sub.2 O and CO.sub.2, are injected through some of the tuyeres. Hot air, hot superoxygenated air, recycled gas, or combustion vapor containing sufficient CO.sub.2 is injected through the other tuyeres.