Process for injecting a reducing agent including ash-bearing bituminous coal into the hearth of a blast furnace

US4428769A · kind A · utility

Assignees

• Rheinische Braunkohlenwerke AG · DE
• Arbed S.A. · LU

Inventors

• Raymond Limpach · Huncherange, LU
• Dietrich Boecker · Münstermaifeld, DE

Key dates

• Filing date: Sep 3, 1981
• Grant date: Jan 31, 1984
• Expiry date: Sep 3, 2001

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C21B5/003
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

In a process for injecting a fine-grain carbon carrier including ash-bearing bituminous or hard coal into a blast furnace hearth, use is made of a mix of fine-grain bituminous coal and at least one other solid fine-grain ash-bearing carbon carrier. The composition of the mix is so selected that the degree of basicity of the overall resulting ash of the mixture is adapted to the degree of basicity of the furnace slag.