Method for producing metals, such as molten pig iron, steel pre-material and ferroalloys

US4533385A · kind A · utility

Assignee

• Voest-Alpine · AT

Inventors

• Walter Lugscheider · Linz, AT
• Paul Mullner · Traun, AT
• Wilhelm Schiffer · Traun, AT
• Alois Leutgob · Steyr, AT

Key dates

• Filing date: Dec 5, 1983
• Grant date: Aug 6, 1985
• Expiry date: Dec 5, 2003

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C22B4/005
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

With a method for producing metals, the raw material is melted in a metallurgical vessel by at least one plasma burner directed from top to bottom. In order to be able to protect the furnace brickwork from too strong a thermal load exerted by the plasma jet, and to make available the energy supplied by the plasma burner to melting and reducing the fine ore to as large an extent as possible as well as to prevent an agglomeration of the raw material to be used, the raw material is topcharged into the metallurgical vessel in the form of fine particles directed parallel to the plasma jet so as to peripherally surround the same. Oxygen-containing gases and carbon are bottom-blown into the vessel through the melt. A foamed slag is formed in the vessel, surrounding the plasma jet over its total height and the flow of supplied raw material particles peripherally. In an arrangement for carrying out the method the plasma burner is peripherally surrounded by a jacket so as to form a supply space for the fine raw material particles which surrounds the plasma burner peripherally. Nozzles are provided in the bottom of the metallurgical vessel to supply oxygen-containing gas and carbon.