Process for treating metallic starting materials for smelting plants, particularly iron sponge particles

US4376139A · kind A · utility

Assignee

• Voest-Alpine · AT

Inventors

• Horst Sulzbacher · Leoben, AT
• Gunther Saiger · Trofaiach, AT
• Kurt Stift · Leoben, AT

Key dates

• Filing date: May 27, 1981
• Grant date: Mar 8, 1983
• Expiry date: May 27, 2001

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P10/134
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

For protecting iron sponge particles against reoxidation and/or corrosion a coating comprising CaO as well as iron or iron oxides as adhesion promotor is applied onto the iron sponge particles. Water is subsequently sprayed onto this coating whereupon a second coating of a mixture of dust-shaped CaO and a carbon carrier is applied. This second coating is subsequently humidified with a smaller amount of water than would be necessary for completely slaking the CaO contained within the second coating.