Method of blowing smelting shaft furnaces and tuyeres used for said blowing

Claim 1

An improved tuyere for a blast furnace, wherein: said tuyere is defined by at least one metal component and being formed of three concentric conduits, said improvement comprises: a central conduit for receiving a hot gaseous blast and two annular conduits associated therewith, all of said conduits leading directly into said blast furnace; a plurality of small diameter channels disposed in proximity to a working end of said tuyere for providing communication between an outer annular conduit for fluid or emulsion containing hydrocarbons, and an intermediate annular conduit for the oxygen or oxidising gas, enabling atomization of part of the flow of hydrocarbons in the stream of oxygen or oxidising gas prior to exit of the tuyere and the remainder of the flow of hydrocarbons being contained in said outer conduit along a path defined by a progressively decreasing cross-section.