Blast furnace operating method and tube bundle-type lance
AssigneeJfe Steel Corporation
InventorsAkinori Murao, Daiki Fujiwara
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Abstract
A blast furnace operating method by blowing at least a solid reducing material into an inside of the furnace from a tuyere thereof with a lance, wherein a tube bundle-type lance formed by bundling a plurality of blowing tubes side-by-side and housing them in a main tube of the lance is used when only a solid reducing material or two kinds of a solid reducing material and a combustible gas or three kinds of a solid reducing material, a combustible gas and a gaseous reducing material are blown in the inside of the blast furnace, whereby the solid reducing material, combustible gas and gaseous reducing material are blown through the respective blowing tubes, and a tube bundle-type lance.
Claims19
A method of operating a blast furnace, the method comprising:
- blowing at least a solid reducing material into an inside of the furnace from a lance via a tuyere that is located downstream from the lance,
- wherein the lance includes a plurality of blowing tubes bundled side-by-side and housed in a main tube of the lance,
- wherein the lance is used when only the solid reducing material or two kinds of the solid reducing material and a combustible gas or three kinds of the solid reducing material, the combustible gas and a gaseous reducing material are blown in the inside of the furnace, and
- wherein the solid reducing material, the combustible gas and the gaseous reducing material are blown through respective blowing tubes of the plurality of blowing tubes.
A lance for blowing at least one of a solid reducing material, a combustible gas and a gaseous reducing material into an inside of a blast furnace via a tuyere located downstream from the lance, the lance comprising:
- a main tube;
- and
- a plurality of blowing tubes that are bundled at a side-by-side state and housed in the main tube.
Dependencies are inferred from the claim text.