Process for utilising iron-containing wastes or residues

• Main Authors: SCHREY; GUENTER, KEPPLINGER; LEOPOLD W, TESSMER; GERO
• Format: Patent
• Language: English
• Published: 25.07.1995
• Edition: 6
• Subjects: CHEMISTRY; MANUFACTURE OF IRON OR STEEL; METALLURGY; METALLURGY OF IRON

In order to utilise wastes or residues containing iron in the oxide form and/or iron in the metallic form and/or containing carbon (38,25,34), a process is used with which molten pig iron (16) or steel preliminary products can be produced, iron ore (4) being reduced to sponge iron in a direct reduction zone (2), the sponge iron being melted in a melting-gasification zone (15) with the supply of carbon-containing material (29) with gasification of the carbon-containing material (29) to reducing gas, and the reducing gas is fed into the direct reduction zone (2), reacted there and drawn off as top gas. In order to be able to utilise the wastes or residues completely and in an energy-saving manner, the wastes or residues (38, 25, 34) are collected separately in three groups depending on their chemical composition, namely a first group contains chiefly substances containing iron in the oxide form (38), a second group chiefly substances containing iron in the metallic form (25) and a third group chiefly carbon-containing substances (34), and the first group is charged into the direct reduction zone (2) and the second group and the third group are charged directly into the melting-gasification zone (15).