Klockner-werke Ag

Hans Jurgen Langhammer

Gunther Geck

Hans Gunther Geck

Horst Abratis

Klaus Schafer

Klaus-Jurgen Rendel

Horst Lotze

Iron-containing materials are loaded into the top of a shaft furnace to form therein an upright column of the materials. A burner forms a flame above the floor of the furnace to heat the base of the column and thereby melt the materials at the base of the column into a liquefied-iron melt on the floor of the furnace and a layer of slag on the melt. In addition this flame formed by the burner forms a deposit in the furnace on which the column is supported. Slag is continuously withdrawn from the furnace at a location substantially level with the deposit and the melt is withdrawn from the furnace at a location below the layer of slag and is heated as it is withdrawn. This melt is withdrawn through an iron-drain conduit having an outlet end vertically positioned to be horizontally even with the lower surface of the slag and a refining vessel working inductively or by means of an electric arc may be provided in this outlet conduit for the continuous transformation of the liquefied iron into steel.

Smelting plant and method

A suspension of a particulate material in a carrier medium is introduced into a molten bath through a lance which has an inlet port, an outlet port and a passage communicating the inlet port with the outlet port. The flow-through cross-sectional area of the outlet port is smaller than the flow-through cross-sectional area of the passage so that the speed of flow of the suspension through the outlet port is higher than the speed of flow of the suspension through the passage and penetration of the molten bath into the outlet port is thereby prevented. The supension is introduced into the inlet port through a conduit having a smaller flow-through cross-sectional area than the passage so that the pulsations of the solution which occur in the conduit are damped in the passage. A duct may introduce pressurized medium into the region of the outlet port to thereby loosen the particulate material accumulated in the region of the outlet port. The lance may include a metallic tube and a lyer of refractory material surrounding the same, and a ceramic tubular element may form a continuation of the metallic tube downstream of the outlet port and having the same flow-through cross-sectional area as the latter.

Arrangement for and a method of introducing particulate material into

A charge consisting of scrap, sponge iron, pellets and the like is admitted into a vertically arranged melting chamber so as to form a column therein. A burner lance generates a flame which melts the column from below so as to produce a melt and an FeO slag. A transportable and tiltable vessel is provided beneath the melting chamber and contains a quantity of pig iron. The melting chamber has an opening at the bottom thereof through which the melt and the slag flow into the vessel to form a mixture containing between 30 and 60 percent by weight of pig iron. Alloying elements and cooling agents are added to the mixture and the resulting molten mass is then at least partially refined in the vessel by blowing with oxygen. During the blowing operation, reaction of the slag and the pig iron occurs and a pourable steel having a desired composition is thereby obtained. The melting of the charge in the melting chamber is carried out without regard to the extent of reaction of the slag and of the pig iron which is required to produce steel of the desired composition.

Process for producing steel

A charge consisting of scrap, sponge iron, pellets and the like is admitted into a vertically arranged melting chamber and forms a column therein. The leading end of the column is melted with an annular flame generated by means of an annular burner or a plurality of burners arranged circumferentially of the melting chamber. In this manner, a downwardly extending projection is formed within the confines of the periphery of the leading end of the column and this bears against the bottom of the melting chamber thereby supporting the column. An outlet for the molten material is provided in the bottom of the chamber and this is surrounded by a projection extending upwardly from the bottom of the chamber. The latter projection is effective for permitting the molten material to remain on the bottom of the chamber for a short period prior to its outflow from the chamber so that the molten material is superheated by the flame. It is of advantage when the dimensions of the projection in the leading end of the column are maintained sufficiently small to prevent substantial heat transfer from the molten material to the column.

Growing community of inventors

Platjenwerbe, Germany

Hans Jurgen Langhammer