Process for desulfurizing molten iron

US4832739A · kind A · utility

Assignees

• Thyssen Stahl AG · DE
• SKW Trostberg Aktiengesellschaft · DE

Inventors

• Walter Meichsner · Krefeld, DE
• Werner Gmohling · Hufschlag, DE
• Manfred Tutte · Moers, DE
• Karl-Heinz Peters · Duisburg, DE

Key dates

• Filing date: Jun 17, 1988
• Grant date: May 23, 1989
• Expiry date: Jun 17, 2008

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C21C1/025
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A process for desulfurizing molten iron using a fine-grain agent consisting essentially of industrial calcium carbide, a dried coal, the coal containing at least 15% by weight of volatile components, and fine-grained magnesium and which agent is injected in fluidized form into an iron melt by means of a gas, comprising separately storing fine-grained magnesium and a calcium carbide/coal mixture, separately fluidizing the fine-grained magnesium and calcium carbide/coal mixture, combining the fluidized fine-grained magnesium and calcium carbide/coal mixture in a conveying line or lance and injecting the resultant combined fluidized mixture into an iron melt. A process for desulfurizing molten iron using a fine-grain agent consisting essentially of industrial calcium carbide, a dried coal, the coal containing at least 15% by weight of volatile components, and fine-grained magnesium and which agent is injected in fluidized form into an iron melt by means of a gas, comprising separately storing fine-grained magnesium, calcium carbide and coal, separately fluidizing the fine-grained magnesium, the calcium carbide and the coal, combining the fluidized fine-grained magnesium, the calicum c…