Operating method and device for a shaft furnace
AssigneeMesser Griesheim GmbH
InventorsRalf Hamberger, Juergen Schmidt, Gerhard Von Hoesslin
Life of this patent
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Abstract
A method for operating a blast furnace includes feeding metallic charge materials, alloy elements and energy carriers in the upper part of the furnace shaft. An oxidizing agent is fed in the lower part of the shaft. Filler material, namely, alloy elements, metal chips, carbon, sands, dust are fed individually or in combination into the melting zone in at least one burst jet. Fuels may be introduced additionally into the first jet. The oxygen is fed at a high speed into the melting zone in at least one separate jet and the conditions of introducing the materials in the first jet and the oxygen in the second jet are controlled so that no flame can be formed.
Claims20
A method for operating a blast furnace comprising shaft having an upper part and a lower part and a melting zone, to which metallic charge materials, alloy elements and energy carriers are fed in the upper part of the shaft, and an oxidizing agent is fed in the lower part of the shaft, filler materials, namely alloy elements, metal chips, carbon, sands, and dusts being fed into the melting zone in at least one first jet, wherein oxygen is fed at a high speed directly into the melting zone in at least one separate second jet, and wherein the conditions of introducing the materials mentioned in the first jet and the oxygen in the second jet are controlled in such a way that no flame can be formed.
An apparatus for operating a blast furnace having a shaft and a lower part and a melting zone, characterized in that at least one combination lance combined, in a constructional unit, to include a material lance directed to the melting zone for forming a first jet and an oxygen lance directed to the melting zone for forming a second jet, and said oxygen lance being capable of feeding oxygen at a high speed directly into the melting zone.
The apparatus as claimed in 11, wherein the at least one combination lance is accommodated in separate introduction channels in the furnace walls, which channels open into the melting zone.
Dependencies are inferred from the claim text.