Method of utilizing waste dust and waste sludge from blast furnaces and steel works

US4189314A · kind A · utility

Assignee

• Fried, Krupp Huttenwerke AG · DE

Inventors

• Ludwig Fiege · Moers, DE
• Hans-Werner Hohle · Moers, DE
• Wilhelm Janssen · Saterland, DE
• Klaus Ulrich · Heiligenhaus, DE

Key dates

• Filing date: Sep 11, 1978
• Grant date: Feb 19, 1980
• Expiry date: Sep 11, 1998

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02W30/50
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A method of utilizing waste dust and waste sludge from blast furnaces and steel works for subsequent steel production comprising forming the waste dust and waste sludge into pellets containing basic gangue and higher sulphur contents and having a metallization degree of over 80% in which up to 10% by weight of the pellets are intimately mixed with liquid pig iron relative to the weight of the pig iron to form a pig iron melt, the pellets being placed into a pig iron charging ladle prior to and/or during the reladling of the liquid pig iron from a torpedo ladle into a charging ladle, and the pig iron is deslagged prior to the pouring thereof into a refining vessel.