Abstract: To be able to produce metal melts using any metal carriers incurring in metallurgical practice as the charging materials, namely in the most diverse quantitative compositions, a plant for producing metal melts is provided with the following characteristic features: an electric arc furnace vessel (1) provided with one charging opening (11, 21) for a metal melt and/or scrap and/or direct reduced metal, in particular direct reduced iron, and/or ore and at least one electrode (16) and one slag tapping means (22), an oxygen-blowing converter vessel (3) provided with one melt tapping means (41), wherein the oxygen-blowing converter vessel (3) and the electric arc furnace vessel (1) form a unit which is connected via an overflow weir (34) and which is rigidly mounted on the foundation and, wherein the bath surface related specifically to the bath volume is smaller in the oxygen-blowing converter vessel (3) than in the electric arc furnace vessel (1) and the oxygen-blowing converter vessel (3) shares a common re

Abstract: For effectively reprocessing iron-containing residual smelting plant materials (1 to 3), in which iron may be present both in metallic form and in oxidic form, with lowest possible energy expenditure, the residual smelting plant materials (1 to 3) are processed into agglomerates (8,11), the agglomerates (8,11) are charged into an electric arc furnace (10), melted there and reduced, and the resultant melt is refined (FIG. 1).

Abstract: To be able to produce metal melts using any metal carriers incurring in metallurgical practice as the charging materials, namely in the most diverse quantitative compositions, a plant for producing metal melts is provided with the following characteristic features:

Abstract: To be able to produce metal melts using any metal carriers incurring in metallurgical practice as the charging materials, namely in the most diverse quantitative compositions, a plant for producing metal melts is provided with the following characteristic features: an electric arc furnace vessel (1) provided with one charging opening (11, 21) for a metal melt and/or scrap and/or direct reduced metal, in particular direct reduced iron, and/or ore and at least one electrode (16) and one slag tapping means (22), an oxygen-blowing converter vessel (3) provided with one melt tapping means (41), wherein the oxygen-blowing converter vessel (3) and the electric arc furnace vessel (1) form a unit which is connected via an overflow weir (34) and which is rigidly mounted on the foundation and, wherein the bath surface related specifically to the bath volume is smaller in the oxygen-blowing converter vessel (3) than in the electric arc furnace vessel (1) and the oxygen-blowing converter vessel (3) shares a common re

Abstract: In order to be able to process in an economical manner different iron carriers in varying quantitative compositions, a plant for the production of iron melts (4), in particular steel melts, such as crude steel melts, is equipped with an electric are furnace vessel (1), a refining vessel (3) following upon the furnace vessel (1) via a weir (34) and including a bottom departing from the weir (34) in an at least partially downwardly inclined manner and an oxygen supply means (35, 36) as well as an iron melt tap (41) provided in its end region farther remote from the furnace vessel (1), a decanting vessel (2) following upon the furnace vessel (1) and having a common bottom (18) with the furnace vessel (1), said decanting vessel being provided with a slag tap (43) in its end region farther remote from the furnace vessel (1), a supply means (21) supplying liquid pig iron (20) and opening into the furnace vessel (1), a preheating shaft (5) supplying solid iron carries (7), said preheating shaft being arranged a

Abstract: A converter for the production of steel from solid and/or liquid charging substances, such as pig iron and/or scrap and/or sponge iron, includes a refractorily lined refining vessel, a refining device for feeding oxygen or an oxygen-containing gas, and a heating device. In order to obtain the maximum output possible at high scrap charging as well as a high purity of the steel, the heating device includes at least one self-consuming graphite electrode and the refining device, independent of the heating device, either is formed by an oxygen-blowing lance or includes oxygen-containing bottom and/or lateral tuyeres located below the melt bath level.

Abstract: A plant for the production of molten metals, includes a melting vessel and a metallurgical vessel receiving the melt from the melting vessel for aftertreating the melt and closed by a lid. The melting vessel has a tap opening for the melt provided on the bottom level of the melting vessel and located on the periphery of the melting vessel. The tap opening is positioned above a pour-in opening of the metallurgical vessel. In order to ensure a continuous melting procedure, the pour-in opening of the metallurgical vessel following the melting vessel is provided above a melt guiding chute arranged within the metallurgical vessel.

Abstract: There are disclosed a method and an arrangement for preventing the agglomeration of crusts in a lance opening passing a wall of a metallurgical vessel and provided for a lance carrying a measuring and/or sampling probe. During the metallurgical process proceeding within the metallurgical vessel and during the taking of a measurement and/or sample by means of a lance introduced into the metallurgical vessel through the lance opening, a gas that is inert relative to a melt bath contained in the metallurgical vessel, or air, is injected into the lance opening from outside, which gas produces a gas veil at the mouth of the lance opening facing the melt bath.

Abstract: A plant for the production of molten metals includes a melting vessel in whose wall burners and optionally oxygen-containing-gas feeding ducts are installed and on whose upper end a charging device as well as a gas evacuation duct receiving the offgases forming enter.In order to enable the continuous charging of the melting vessel by avoiding any unintentional escape of gas from the melting vessel, both the gas evacuation duct and the charging means run into the upper end of the furnace shaft laterally and approximately diametrically opposite each other. The charging means projects into a charging opening brushed over by a gas curtain and an intake chute for charging material is provided below the charging opening in a manner directed towards the center of the furnace shaft.

Abstract: There is disclosed a process for the production of molten steel or steel pre-products from scrap contaminated with combustible waste-like substances and heated and melted in a metallurgical meltdown vessel. In order to be able to dispose of the forming noxious substances at low costs and to keep the offgases free of impurities detrimental to the environment, the gas forming during charging of scrap into the metallurgical vessel and during heating and melting of the scrap, after conditioning to a temperature range of between 1000.degree. and 1500.degree. C., is used as a heating gas in a lime-burning process including a moving lime fixed-bed under release of its sensible heat. Sulfur- and chlorine-containing components of the heating gas are absorbed on the burnt lime and the dust contained in the heating gas is separated in the lime fixed-bed. The heating gas, which is purified and cooled at its passage through the lime fixed-bed, subsequently is finally purified in a filtering plant.

Abstract: There is disclosed a metallurgical vessel, such as a steelworks converter, having a refractory brick lining and a probe opening passing a wall of the vessel for introducing a measuring and/or sampling probe. In order that the probe opening will get obstructed only minimally, if at all, and possible deposits of slag will be removed easily and quickly, the probe opening is provided with a lining of graphite or a graphite/alumina mixture.

Abstract: There is disclosed a metallurgical vessel, such as a steelworks converter, having a refractory brick lining and a probe opening passing a wall of the vessel for introducing a measuring and/or sampling probe. In order that the probe opening will get obstructed only minimally, if at all, and possible deposits of slag will be removed easily and quickly, the probe opening is provided with a lining of graphite or a graphite/alumina mixture.

Abstract: To produce deoxidized steel by the addition of deoxidizing agents to molten crude steel having an oxygen content of at least 200 ppm and the subsequent addition of alloying agents, the deoxidation is realized at least partially under the formation of liquid deoxidation products by the simultaneous addition of the two deoxidizing agents FeSi and FeMn. The method according to the invention ensures a great analytical precision of the steel and is not limited to the production of certain steels.

Abstract: There is disclosed a shaft furnace for the direct reduction of iron ores. It includes a gas feed device arranged centrally in the bottom of the shaft furnace in the longitudinal axis of the shaft furnace and having a central cavity. From the cavity, a plurality of gas outlets for the reduction gas, superposed in stages and passing through the gas feed device in its upper part, lead into the interior of the shaft furnace. In order to provide a shaft furnace with which operational failures caused by the gas feed device are prevented and with which the gas feed device is subject to little wear so that it need be exchanged in large time intervals only, the gas feed device is designed as a double-shelled hollow body. The shell interspace of the hollow body is connected to at least one supply duct and at least one discharge duct for a coolant.

Abstract: In a method for the production of synthesis or reduction gases from carbonaceous fuels and oxygen-containing gases endothermally reacting with the fuels, the starting products are reacted in a plasma reaction zone. In order to provide a method by which the production of reduction gases is feasible up to the highest flow rates in an operationally safe manner and by an optimum utilization of the energy supplied, the components to be reacted are commonly conducted through an elongate reaction chamber as a feed fluid. A central plasma jet is formed over the total longitudinal extension of the reaction chamber. The arrangement, i.e., the elongate reaction chamber, includes a plasma electrode (cathode) on one end and a counter electrode (anode) on the other end; supply ducts for the feed fluid and discharge ducts for the synthesis or reduction gases in the region of the plasma electrode end are provided.

Abstract: Apparatus for discharging hot flowable solids comprises conical conveyor screws, which are arranged to form a star-shaped array and contained in respective conveyor troughs and at their inner ends are rotatably mounted in a centrally disposed hollow body. In order to ensure a gas-tight seal of the furnace and to permit a simple replacement of the conveyor screws, the conveyor troughs and the centrally disposed, open-bottomed hollow body are constituted by a bottom structure, which is adapted to be flange-connected to the shell of the furnace. The largest depth of each conveyor trough is at least as large as the largest outside diameter of the associated conveyor screw. Each conveyor trough is closed at its outer end by an end wall, which carries a discharge housing, which contains the outer end of the associated conveyor screw and carries a discharge fitting.