초록 ▼

In a method for producing liquid pig iron (9) or steel pre-products from fine-particulate iron-containing material (4) in a melter gasifier (1), the iron-containing material (4) is melted in a bed of solid carbon carriers (2) under supply of carbon-containing material (2) and oxygen-containing gas,

In a method for producing liquid pig iron (9) or steel pre-products from fine-particulate iron-containing material (4) in a melter gasifier (1), the iron-containing material (4) is melted in a bed of solid carbon carriers (2) under supply of carbon-containing material (2) and oxygen-containing gas, at the simultaneous formation of a reducing gas, wherein the fine-particulate reduced material (4) and oxygen are introduced into the bed (20, 21) from the side. To be able to charge the fine-particulate iron-containing material to the melter gasifier (1) without a need for briquetting and, in doing so, avoid discharging of the fine-particulate iron-containing material (4) by the reducing gas formed in the melter gasifier (1), a fluidized bed (21) of fine-particulate solid carbon carriers (2) and fine-particulate iron-containing reduced material (4) is maintained above a fixed bed (20) formed of solid carbon carriers (2) and the fine-particulate reduced material (4) is charged into the fluidized bed (21) 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 (4), and the fine-particulate reduced material (4) is melted in the fluidized bed (FIG. 1).

대표청구항 ▼

1. A plant for producing liquid pig iron (9) or steel pre-products from fine-particulate reduced iron-containing material (4), comprising a melter gasifier (1) having supply and discharge ducts (3, 5, 6, 7) for adding carbon-containing material (2), iron-containing reduced fine-particulate material

1. A plant for producing liquid pig iron (9) or steel pre-products from fine-particulate reduced iron-containing material (4), comprising a melter gasifier (1) having supply and discharge ducts (3, 5, 6, 7) for adding carbon-containing material (2), iron-containing reduced fine-particulate material (4), for withdrawing the generated reducing gas and for feeding oxygen, and further comprising a tap (11) for slag and iron-melt, characterized in that a lower section (8) of the melter gasifier (1) serves for collecting the molten pig iron (9) and the liquid slag (10) and a superimposed central section for accommodating a fixed bed (20) of solid carbon carriers and subsequently an upper section for accommodating a fluidized bed (21) and that a calming space is provided there above, that at the level of the fluidized bed (21) at least one mouth of a conveying duct (7) for fine-particulate reduced material (4) is provided in the side wall of the melter gasifier (1) and that an oxygen supply duct (23) is provided in immediate proximity to the conveying duct (7) for fine-particulate reduced material (4), wherein said conveying duct (7) runs to the melter gasifier via a fluidized bed sluice, and that a duct (31) supplying a conveying gas for the fine-particulate reduced material (4) runs into the fluidized bed sluice (16).