Mill arrangement with temporary storage vessel and a process of operating the same

US4867787A · kind A · utility

Assignee

• Voest-Alpine · AT

Inventors

• Othmar Puhringer · Linz, AT
• Felix Wallner · Linz, AT
• Horst Wiesinger · Linz, AT
• Ernst Eichberger · Wels, AT
• Wilhelm Schiffer · Traun, AT
• Walter Rockenschaub · Linz, AT

Key dates

• Filing date: Aug 4, 1987
• Grant date: Sep 19, 1989
• Expiry date: Aug 4, 2007

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P10/20
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

In operating a mill including a blast furnace and a steel converter, it is difficult to mutually adapt the operations of the blast furnace and of the converter in a flexible way. When using scrap as a coolant in the refining process, undesired accompanying elements are introduced into the metal melt. The invention consists in that, instead of a blast furnace, a direct reduction plant in combination with a meltdown gasifier are provided as the pig iron source. This aggregate is operated in combination with a single steel converter. The direct reduction plant, on its discharge side, is connected both with the meltdown gasifier and with the steel converter via sponge iron transporting devices. The meltdown gasifier communicates with the steel converter via a transport line for molten pig iron. As the solid charge in the refining process sponge iron is exclusively used.