Method of producing molten pig iron or steel pre-products from particulate ferrous material

US4708736A · kind A · utility

Assignees

• Voest-Alpine Akt. · AT
• Korf Engineering GmbH · DE

Inventors

• Rolf Hauk · Düsseldorf, DE
• Werner Kepplinger · Linz, AT

Key dates

• Filing date: Mar 12, 1986
• Grant date: Nov 24, 1987
• Expiry date: Mar 12, 2006

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C21B13/002
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

In a method of producing molten pig iron or steel pre-products from particulate ferrous material, as well as of producing reduction gas in a melt-down gasifier by adding coal and by blowing in oxygen-containing gas by means of nozzle pipes penetrating the wall of the melt-down gasifier, a fixed bed formed of coke particles, through which the oxygen-containing gas flows and a superposed fluidized bed of coke particles are formed, and the ferrous material is charged onto the fluidized bed. Below the fixed bed through which oxygen-containing gas flows, a fixed bed of coke particles not passed through by gas is provided, and the fluidized bed above the fixed bed passed through by oxygen-containing gas is passed through by a gas free from oxygen or having a low oxygen content.