Abstract: There is disclosed a process for producing an iron melt in a reactor with current supply. In order to utilize fine-grained iron carriers in a particularly economic manner while minimizing the energy input when carrying out such process in an electric arc furnace, it is proceeded in the following manner:an iron melt is provided in the electric arc furnace,a foamed slag is provided and maintained on the iron melt,fine-grained iron carriers, such as metallurgical dusts, fine ores, iron carbide, dust from the production of directly reduced iron, scales, dried metallurgical slurries, etc., are introduced into the foamed slag continuously or discontinuously,fine-grained carbon-containing reducing agents, such as coal, coke, wood, graphite, synthetic materials, etc.

Abstract: In a method for manufacturing a base anode (10) having a multiplicity of adjacently arranged metal elements (11) for a metallurgical vessel (1), the intermediate spaces (14) between the metal elements (11) are filled with refractory material (16), the refractory material (16) being compressed. To achieve a high degree of compression in a short period of time, the compression of the refractory material (16) takes place by means of vibration.

Abstract: The tube for introducing a metal melt into a continuous casting mold having broad side walls and narrow side or end walls includes a tube section provided with lateral openings for the metal melt whose central axes substantially are oriented towards the narrow sides of the strand being formed in the mold and a bottom portion provided with a bottom opening for the metal melt. In order to ensure, at high casting rates, both a slight vertical depth of penetration of the metal melt supplied through the casting tube into a liquid core of the strand and a slight whirl formation on the meniscus, the bottom portion includes at least two bottom openings oriented obliquely towards the narrow sides of the strand so as to form at least two casting jets whose flow directions cross each other in a viewing direction extending perpendicular to the wide sides of the strand.

Abstract: A process for producing molten pig iron or molten steel pre-products from charging substances formed of iron ores and fluxes and at least partially comprising fines, wherein the charging substances are directly reduced to sponge iron in at least one reduction zone by the fluidized layer process, the sponge iron is melted in a melting-gasifying zone under supply of carbon carriers and oxygen-containing gas, and a CO and H.sub.2 -containing reducing gas is produced, which is injected into the reduction zone, is reacted there, is withdrawn as an export gas and is supplied to a consumer, is to be improved with a view to rendering feasible the use of fine ore in an economic manner.

Abstract: A continuous casting plant for the optional casting of an ingot of slab cross section or of ingots of smaller cross section has a first structural unit which is developed as plate mold for the casting of an ingot of slab cross section. This structural unit is supported on a mold support structure (1) and can be replaced by a second structural unit (16) having molds (21, 22, 23) for the casting of ingots of smaller cross section. For the dependable supporting of the molds (21, 22, 23) for the casting of a smaller cross section, the second structural unit (16) is formed of two longitudinal girders (17, 17') which are arranged spaced from and approximately parallel to each other and are rigidly connected to each other, the molds (21, 22, 23) being supported on the longitudinal girders (17, 17').

Abstract: In continuous casting in a continuous casting plant, a strand (2) after emergence from the mold (1) is reduced in thickness by a wedge-shaped roller gap. In order to assure upon the casting to obtain the shortest possible wedge-shaped solidified head piece (25) or in the event of an interruption in casting or a decrease in the operating casting speed a short completely solidified strand intermediate piece of a thickness (28) differing from the desired final thickness (26) of the strand, the strand (2) is reduced in thickness exclusively in a region in which it has a liquid center (20), support segments (4, 5) being so directed at all times that the liquid tip (19) of the liquid center (20) always lies in a region of the strand guide in which the roller gap developed by the rollers (8) is the narrowest parallel gap--with respect to the following strand guide and disregarding a roller adjustment which follows the shrinkage of the completely solidified strand.

Abstract: A strip accumulator comprises an outer circular set of radially extending carrying rollers which serve to carry an upright outer strip coil, a concentric inner circular set of radially extending, freely rotatable carrying rollers for an inner strip coil connected to the outer strip coil by a reversing loop, a core for the inner strip coil comprised of a roller cage consisting of rollers having parallel axes, one of which is a payout roller for guiding the strip to an inclined delivery roller within the cage. To make the accumulator independent of the dimensions and material properties of the strip, a looping roller for forming the reversing loop is provided between the sets of carrying rollers. The looping roller revolved about the axis of the circular sets at a velocity that is equal to one-half of the difference between the velocities of the incoming and outgoing strips, and a circular set of inclined rollers extend radially inwardly on the inside of the outer circular set of carrying rollers.

Abstract: There is disclosed an electric arc furnace for the production of steel by melting scrap, in particular iron scrap, and/or sponge iron and/or pig iron as well as fluxes in a furnace vessel, into which at least one graphite electrode projects, which is displaceable in its longitudinal direction, wherein an electric arc is ignited between the graphite electrode and the charging stock. To achieve a particularly high energy input, the graphite electrode projects into a lower part of the furnace vessel from aside and the lower part, in the region of the graphite electrode, has an enlargement radially protruding outwardly relative to the upper part.

Abstract: A plant is provided for producing molten pig iron or molten steel pre-products from lumpy, iron-ore-containing charging substances. The plant comprises a reduction shaft furnace for receiving lumpy, iron-ore-containing charging substances, the plant including a melter gasifier for receiving the reduction product formed in the reduction shaft furnace. The plant also includes a first charging device for at least one of iron ore and ore dust and a second charging device for solid carbon carriers, the melter gasifier being provided with a device for flow-connecting the first charging device for at least one of iron ore and ore dust and the second charging device for charging carbon carriers to at least one dust burner.

Abstract: There is provided a seal for a starter bar head to be used in a continuous caster. The seal extends into a gap provided between the starter bar head and the side walls of a continuous casting mold under direct contact of the side faces of the starter bar head and of the mold side walls. In order to be able to produce this seal in a simple manner and to install it in a particularly quick manner, the seal is extended upwardly in the direction of the mold cavity at least as far as to the front face of the starter bar head and includes a cover part at least partially covering the front face of the starter bar head. The cover part is located to be free and uncovered relative to the mold cavity of the continuous casting mold and possibly introduced cooling scrap directly rests on the cover part of the seal.

Abstract: A method of and apparatus for charging fine-grained ore into a reactor pressure vessel through which process gas flows. The heated ore at first is introduced into a conveying pressure vessel, is pressurized within the same by compressed gas and subsequently is conveyed into the reactor pressure vessel through a conveying duct by aid of the compressed gas. In order to ensure favorable utilization of the reactor pressure vessel under uniform stress and to safeguard troublefree progression of reduction while directly charging the ore, a portion of the ore is introduced into at least one further conveying pressure vessel and is pressurized within the same also by compressed gas. Charging of the ore into the reactor pressure vessel is effected continuously by alternately feeding once from the one conveying pressure vessel and subsequently from the other conveying pressure vessel.

Abstract: A process for producing molten pig iron or molten steel pre-products from charging substances formed of iron ores and fluxes and at least partially comprising fines, wherein the charging substances are directly reduced to sponge iron in at least one reduction zone by the fluidized layer process, the sponge iron is melted in a melting-gasifying zone under supply of carbon carriers and oxygen-containing gas, and a CO and H.sub.2 -containing reducing gas is produced, which is injected into the reduction zone, is reacted there, is withdrawn as an export gas and is supplied to a consumer, is to be improved with a view to rendering feasible the use of fine ore in an economic manner.

Abstract: A process for producing molten pig iron or molten steel pre-products from charging substances formed of iron ores and fluxes and at least partially comprising fines, wherein the charging substances are directly reduced to sponge iron in at least one reduction zone by the fluidized layer process, the sponge iron is melted in a melting-gasifying zone under supply of carbon carriers and oxygen-containing gas, and a CO and H.sub.2 -containing reducing gas is produced, which is injected into the reduction zone, is reacted there, is withdrawn as an export gas and is supplied to a consumer, is to be improved with a view to rendering feasible the use of fine ore in an economic manner.

Abstract: A bottom anode for a metallurgical vessel destined for producing a metal melt is formed by a metal bar provided with at least one through recess extending from outside of the metallurgical vessel as far as to within the metallurgical vessel. In order to substantially increase the service life of such a bottom anode, conforming it to that of a lining made of refractory material, the bottom anode, on the vessel internal-side end of the metal bar, is provided with a nose formed of metal melt produced within the vessel. The nose incorporates channels departing from the vessel internal-side end of the through recess of the metal bar, which is connected to a supply duct introducing liquid and/or solid hydrocarbons, and at least some of the channels reaching as far as the surface of the nose.

Abstract: A continuous casting plate mold includes an oscillating lifting table and parallel first side walls and second side walls capable of being clamped between the first side walls by a clamping device. The side walls are supported directly on the lifting table on both sides, i.e., without interposition of a water box. In order to be able to remove all of said side walls from the lifting table in a single operation and within a very short span of time as well as to enable a particularly light-weight construction of the lifting table, both of the second side walls are supported on at least one of the first side walls and on the lifting table via the same.

Abstract: In a process for producing an iron melt, iron ore is reduced to sponge iron in a direct reduction zone. The sponge iron is melted in a meltdown gasifying zone while supplying carbon-containing material under gasification of the carbon-containing material to reducing gas and under formation of a slag. The reducing gas is injected into the direct reduction zone, is reacted there and is drawn off as a top gas. The reducing gas and/or the top gas is subjected to gas scrubbing and the sludges separated during scrubbing are admixed with binder and coal dust and subsequently are agglomerated.

Abstract: A continuous casting mold comprising an oscillating supporting structure including side walls defining a mold cavity, together with the supporting structure, is supported on a lifting table oscillated by an oscillation drive and guided in the oscillation direction by a guiding device. In order to keep the oscillating masses as small as possible and to improve the space conditions below the mold as well as to ensure easy repair, the lifting table is formed by at least two oscillating beams arranged at a distance leaving free the horizontal dimensions of the mold cavity and bridged by the supporting structure including the side walls.

Abstract: In the manufacture of cold-moulded briquettes from iron-containing waste metallurgical material mixed with a binder, in order to obtain high-strength briquettes and almost complete reducibility, magnetite waste metallurgical material such as scale (1) is mixed with haematite fine material (5) to form a layer (10) of haematite line materials (5) enveloping the individual magnetite particles (9), after which the binder is added to the mixture (FIG. 1).

Abstract: In a process for the continuous melting down of scrap metal, in particular of bales of scrap metal, which contain residual plastic materials, the scrap metal being fed to a melt-down reactor (1) and the heat required to melt this down being obtained by direct heating from below, using burners that are arranged close to the tapping point, the process is managed in the melt-down reactor (1) as a reducing process; part of the process gases is returned to the melt-down reactor (1) as combustion gas after utilization of the sensible heat and purification; the remaining portion is passed out as output gas. This makes it possible to operate without oversize gas purification systems when melting down scrap metal that contains plastic, and to utilize the pyrolysed substances that are contained in the working material to good effect.

Abstract: A conveying arrangement for the dosed conveyance of bulk material from one metallurgical vessel into another through a conveying channel. The conveying channel has an entry opening and a discharge opening. A conveyor worm is rotatably located in the conveying channel, extending at least from the entry opening to the discharge opening and including a first flight formed by a plurality of paddles. In order to be able to configure the conveyor worm as short as possible and to minimize gas streaming through the conveying channel, the conveyor worm, on its end associated with the discharge opening, has a second flight that is formed by a continuous helix extending at least over half a convolution.