Abstract: A continuous casting and hot rolling apparatus for the parallel production for a multiplicity of rolled shapes, wire and rod of circular, oval and polygonyl cross section in which a continuous caster or flow shaper produces initially a plurality of discreet strands which continuously are fed to a hot rolling line and then can be diverted, if desired to a universal rolling unit in which pairs of strands are rolled alternately in vertical and horizontal rolls. The unit may be driven by a common motor and can have drive shafts for the respective stands located at the vertices of an isosceles triangle.

Abstract: A method for hot dip galvanizing of hot-rolled steel strip, wherein in a first method step, the strip (50) is introduced into a pickling station (10-13) and a layer of scale and reaction products are removed from the strip surface in the pickling station. In another method step, the strip (50) is introduced into a rinsing station (21-23) and residues of the pickle and pickling products are removed from the strip surface in the rinsing station, and subsequently the strip is introduced into a drying station and is dried. And from there, in another method step, the strip is introduced into a furnace (40) and is adjusted to galvanizing temperature under a protective gas atmosphere. In a last method step, the strip is guided through a galvanizing bath and the surface of the (50) is coated with a hot dip galvanizing layer in the galvanizing bath, wherein the strip temperature in the furnace (40) is adjusted at most to 50° K. above immersion temperature of the strip (50) into the zinc bath.

Abstract: A method of operating a counterflow cascade washer for wet-chemical treatment of a surface of a metal strip and including branching a portion of a water flow, which circulates through a rinsing water circuit associated with each of the washer units off in form of a bypass stream, and feeding the bypass stream to a washer unit located immediately upstream of respective washer unit, and an apparatus for effecting the method.

Abstract: A device for controlling a discharge drop position of rod wire coils transportable by a horizontal conveyor and stackable in a vertical bundle build-up chute located beneath an end of the transporting conveyor and behind the transporting conveyor end in a transporting direction, with the device including friction brake element for impacting an outer circumference of the rod wire coils and located opposite the transporting conveyor end at a distance therefrom and beneath a charging opening of the bundle build-up chute in a drop region of the rod wire coils.

Abstract: The aim of the invention is to improve the cooling of the bottom electrodes (1) of metallurgical melting vessels. To this end, a cooling plate (5) is situated beneath the support plate (2) on which the contact elements (3) are supported. The cooling plate is set apart from the support plate. This forms a cooling chamber (4) through which a cooling medium flows, the cooling effect of said medium being reinforced by cooling ribs (6). Said cooling ribs are situated in the cooling chamber (4) and are welded to the support plate (2) and preferably, also to the cooling plate (5).

Abstract: An electric steel-making furnace has a furnace roof carried by an upper furnace shell on a lower furnace shell to substantially envelop an atmosphere above liquid steel and slag floating thereon in the lower furnace shell. A transfer car supports the lower furnace shell for transport from a furnace-operating site to a remote exchange site for exchanging one or more of the furnace roof, the upper furnace shell and the lower furnace shell. The furnace transfer car has a furnace support platform engaged with the lower furnace shell and supported for tilting of the furnace on the transfer car by actuators at the furnace operating site in a direction to increase the depth of slag at the deslagging passageway for decanting slag floating on liquid steel in the lower furnace shell. Actuators are also provided to tilt the furnace on the transfer car to increase the depth of liquid steel at a tap hole assembly during tapping of a steel heat.

Abstract: A device for the continuous casting of metal includes a lifting platform which can be driven in an oscillating fashion by a drive device, a continuous casting mold received on the lifting platform, and a stationarily arranged support frame provided with guiding or bearing elements for the lifting platform. The guiding or bearing element is an elastic spring system including two spring legs arranged angularly relative to one another and extending perpendicularly to the oscillation direction. The two spring legs are formed like a tuning fork and respectively overlapping upper and lower ends of the two spring legs form the support surface for the lifting platform or the connecting surface with the stationarily arranged support frame. The spring system, in addition to the force in the oscillation direction, compensates by load balancing disturbing forces in directions perpendicular to the oscillation direction.

Abstract: A nozzle beam for descaling or cooling metal strand material, particularly rolling stock, includes an inlet for the product treatment liquid and an additional inlet for a device cooling liquid, an outlet for the device cooling liquid, and a switching member for opening and closing the device cooling liquid outlet. The switching member is automatically switchable through a device cooling liquid pressure which controls the state of operation of the nozzle beam.

Abstract: The invention relates to strip casting machines comprised of two parallel casting rollers (1, 2) whose bearing journals (8, 9) are supported on a stand (3). Cooled roll barrels of the casting rollers (1, 2) and narrow lateral parts (5) delimit a casting gap (6). The aim of the invention is to obtain an optimal ratio between the width of the casting machine and the maximally castable strip width, to provide for a simple stand construction both for changing rollers as well as for exchanging narrow lateral parts, and to attain an improved protection against oxidation. To these ends, the invention provides that the cooled roll barrels are constructed as cylindrical casings (4). The casing (4) should be supported on a stationary axle, which is fixed on the stand (3), via the concentric support rings which project inside the casing (4) on both sides and which are connected to the same.

Abstract: The aim of the invention is to provide a means of also cooling the lower part of electric arc furnaces and/or resistance furnaces. To this end, said lower part—the actual melting vessel (4)—is surrounded with a jacket (9) at a certain distance, forming a shell, and the resulting intermediate space is configured as a cooling device (10) and subjected to the action of a cooling medium (14).

Abstract: The invention relates to a throat closing device for shaft furnaces, especially blast furnaces having a material feeding hopper (1), to which a temporarily rotating rotary hopper (2) which is sealed with regard to the stationary parts (3) is connected. The inventive throat closing device is produced such that it has a less complex construction and is easier to install, and can be easily serviced due to the provision of a sealing unit (5) comprised of an adjusting flange (7) which is arranged above the rotary hopper (2), is complementary to the hopper flange (6) thereof, can be lifted and lowered, and which comprises seals (8, 9) located on the flange underside. Said sealing unit is configured in a spanning wall (12) which comprises a compensating element (13) and which connects the adjusting flange (7) to the stationary part (3) of the rotary hopper (2).

Abstract: A method of heat treatment of wire including cooling the wire stock immediately after the stock leaves the rolling heat region to a temperature below the starting temperature of martensite formation and, thereafter, forming wire coils.

Abstract: A method for recovering metallic chromium from slags which contain chromium oxide from converter processes, such as AOD, MRP, AOD-L, MRP-L, CLU, ASM, Conarc stainless steel or vacuum processes, such as VOD, SS-VOD, RH, RH with lanze, includes drawing off the slag which is produced at the end of a blowing or treatment operation in a converter or a vacuum installation in unreduced form. The slag is charged into an electric furnace, which is also charged with a standard charge of scrap and, if appropriate, dust residues. Carbon and, if appropriate, silicon are additionally added to the electric furnace.

Abstract: Sheet piling and like steel shapes are made in a caliber rolling mill having upper and lower rolls of suitable contour. One of the rolls is axially fixed and the other can be shifted axially in opposite directions so that shoulders of the rolls engage and these positions are stored along with a relationship of axial force and spring constants of the mill frame. The rolling then takes these stored values into consideration.

Abstract: A rolling roll train of the staggered-roll tandem type has a pair of upright stand walls with windows or openings for receiving a multiplicity of pairs of rolls which can be changed as a unit. The fact that unitary walls with traverses between the walls for stabilizing them and where those traverses are located between the roll pairs, enables the spacing between the roll pairs to be substantially reduced by comparison with free-standing individual mill stands for the roll pairs.

Abstract: In a method for contactless online measuring of the wall thickness of hot-rolled pipes in the hot state for determining undesirable inner wall structures, at least one measuring head, operating according to the laser ultrasound method, scans a segment of a wall of a pipe to be measured in a circumferential direction during or directly after a rolling process. The course of the wall of a cross-section of the pipe is then reconstructed with a computer. The measuring head is a compact laser ultrasound measuring head adjustable relative to the pipe dimension to be measured. It has an excitation laser and an illumination laser and optical elements for collecting a carrier light containing the ultrasound signal and reflected at a surface of the pipe. The excitation and illumination lasers and the optical elements are arranged in a common housing of the measuring head. A pivot device is provided to pivot the laser ultrasound measuring head across a segment of the pipe in the circumferential direction.

Abstract: The invention relates to the emptying of melting vessels (1) by tipping. According to the invention, the melting vessel (1) is placed on column-shaped bases (6). During the tipping process, the melting vessel (1) is raised at the side and the base supports (7) of the opposite side are used as the pivot or axis of rotation. This ensures that the discharge opening (4) and the slag overflow edge (5) are not moved very far from their original position.

Abstract: The invention relates to a strip-casting machine (20) for producing a metal strip. Said strip-casting machine consists of a pair of casting rolls (22, 24) arranged in side-by-side parallel relation with a casting gap thereinbetween and of lateral sealing elements (25) that are provided with respective sealing plates (61) at both sides of the casting rolls (22, 24) that are pushed or pressed against the casting rolls from the front by means of pushing or pressing means. The respective sealing plate (61) is pushed or pressed against the two equilateral front faces (22′, 24′) of the casting rolls (22, 24) in such a manner that, in the heated operational state, it facilitates an extremely exact positioning on the front faces of the casting rolls. To this end, the sealing plate (61) is mounted in such a manner as to allow a three-dimensional displacement of the sealing plate, as if floating.

Abstract: The invention relates to a strip-casting machine (20) for producing a metal strip. Said strip-casting machine consists of a pair of casting rolls (22, 24) arranged in side-by-side parallel relation of lateral sealing elements (25) that are provided with respective sealing plates (61) at both sides of the casting rolls (22, 24) and that adjoin the casting rolls. The contact pressure of the sealing plate (61) against the casting rolls (22, 24) and/or the frictional conditions between them can be measured. The sealing plates (61) at the front faces (22′, 24′) of the casting rolls (22, 24) are positioned at a distance of a few tenth of millimeters or so as to closely fit the front faces (22′, 24′) in the operational state, with our without contact pressure. The sealing plates are positioned in such a manner that also in the heated operational state the desired positions of the sealing plates relative to the front faces of the casting rolls are kept very precise.

Abstract: A rolling system has a die having a row of separate throughgoing passages for producing a plurality of continuously advancing and parallel hot metal strands and a plurality of pinch rollers for pulling the strands out of the die and moving them in a direction along a path. A vertical-roll stand on the path receives the strands and horizontally compresses them. A horizontal-roll stand on the path aligned in the direction with the vertical-roll stand receives the strands and vertically compresses them. The rolls are rotated to draw the strands downstream.