Process for producing liquid pig iron or semifinished steel products from iron-containing materials

Abstract

In a method for producing liquid pig iron ( ) or steel pre-products from fine-particulate iron-containing material ( ) in a melter gasifier ( ), the iron-containing material ( ) is melted in a bed of solid carbon carriers ( ) under supply of carbon-containing material ( ) and oxygen-containing gas, at the simultaneous formation of a reducing gas, wherein the fine-particulate reduced material ( ) and oxygen are introduced into the bed ( ) from the side. To be able to charge the fine-particulate iron-containing material to the melter gasifier ( ) without a need for briquetting and, in doing so, avoid discharging of the fine-particulate iron-containing material ( ) by the reducing gas formed in the melter gasifier ( ), a fluidized bed ( ) of fine-particulate solid carbon carriers ( ) and fine-particulate iron-containing reduced material ( ) is maintained above a fixed bed ( ) formed of solid carbon carriers ( ) and the fine-particulate reduced material ( ) is charged into the fluidized bed ( ) directly, in immediate contact with oxygen, preferably in the form of a strand having a ring-shaped cross-section and peripherally surrounding an oxygen jet and enclosing the oxygen, such that the oxygen is enclosed by the supplied fine-particulate reduced material ( ), and the fine-particulate reduced material ( ) is melted in the fluidized bed (FIG. ).