Abstract: An improved blast furnace system for producing molten iron incorporating a preheater to heat the cold blast air used to temper the hot blast temperature is disclosed. The improved blast furnace system comprises a blast furnace, a hot blast main for conveying a supply of hot blast to the blast furnace, a plurality of stoves for heating a supply of cold blast and generating the hot blast, a cold blast main for conveying a supply of cold blast to the plurality of stoves, and at least one cold blast preheater for heating a portion of the cold blast, that has been diverted to the preheater, into heated air and the heated air is mixed with the hot blast to temper the hot blast temperature.

Abstract: A process and apparatus for continuously reducing carbon monoxide (CO), uncombined free hydrogen (H2) and volatile hydrocarbons (VOC's) in molten metal refining vessel off-gases without forming undesirable oxides of nitrogen. Off-gases are directed to a reaction chamber wherein CO, H2 and VOC's are oxidized at a controlled temperature and with a controlled quantity of O2 So as to realize substantially total oxidation of gases present with minimized formation of oxides of nitrogen. Volume and energy of treated gases directed for baghouse treatment are reduced in comparison with prior practice.

Abstract: A process and apparatus for separating briquettes and fragments in a product stream resulting from briquetting direct reduced iron. Separating and cooling of the briquettes and fragments are carried out simultaneously in an initial step with use of separating means submerged in a cooling bath. The process enables use of less rugged apparatus following the initial step and the apparatus is not subjected to handling the product stream at the elevated temperatures at which briquetting is carried out. Capital expenditure and equipment maintenance is thus reduced.

Abstract: A band product accumulation unit including a mechanism for controlling the running of a band along a longitudinal direction, a fixed frame, a wrap-around carriage which is moveable on a track between a return position of minimum accumulation length and an out position of maximum accumulation length, wherein movement towards the out position increases a length while movement towards the return position decreases the length, the band being adapted to pass over at least one return member mounted on the wrap-around carriage so as to form at least an out portion and at least a return portion and defined by at least two spaced levels, a plurality of intermediate supporting members arranged along the track, each comprising at least one separating arm extending horizontally on at least one intermediate level disposed between two running levels of the band, each separating arm being fixed to a shaft which is pivotal about a vertical axis with respect to the fixed frame, a mechanism for controling the pivoting of each

Abstract: A device and method for changing rolls in a roll stand. Each stand includes two working rolls, each having a backing up assembly including at least one intermediate roll. An adjustment structure is provided for adjusting levels in relation to the axes of each of the rolls with respect to the stand and for setting forth four levels of disassembly, respectively of both working rolls and both intermediate rolls. Two pairs of rails are provided parallel to the axes of the rolls arranged on the stand at two constant levels each at a level of disassembly and carrying sliding carrying members for removal of the corresponding intermediate roll. A handling device is placed on one side of the stand and includes at least one handling and guiding chassis carrying two pairs of rails aligned respectively with both pairs of rails on the stand. At least one extractor device is mounted to slide at a constant level on the guiding chassis.

Abstract: A revolver-type coiler comprising at least two rotary chucks (21, 22) carried by a revolving mounting (1) enabling to place each chuck (21), successively into a first position (A) for starting the winding operation, then into a second position (B) for completion of the winding and unloading of the coil (3). The coiler comprises a continuous supporting device (4, 41, 5) for the end (24) of each chuck (21) opposite to the mounting (1) from the first starting position (A) to the complete winding position (B), comprising at least one rotary removable resting member (4) resting on the fixed frame (12) and installed to rotate, with the revolving mounting (1) in order to support the end (24) of the chuck (21) from the first starting position (A) to the second complete winding position (B).

Abstract: The device for the making a flat product (P) comprises a cylindrical wall, brought into rotation around a fixed core (1) and cooled by circulation of a fluid for the formation, of the flat product (P), onto an angular sector of the wall (2). The cooled wall on which is cast the metal is made up of a thin metal envelope forming a shell (2) simply inserted with possibility of sliding onto a circular surface (11) of the fixed core which constitute the central section of a fixed shaft (1) to hold and center the shell (2), the shaft (1) being connected with a thrust device allowing application of the shell (2) on the circular surface (11) of the shaft (1), the cooling fluid providing the lubrication of the bush thus made.

Abstract: The invention relates to an installation for coating a metallic band by guiding the latter through an electrolytic bath (12), while passing in front of at least one anode plate (13) constituted of a set of bars arranged beside one another along a direction transversal to the forward direction (A) of the band (23) and carried by an anode bridge (14), whereas each bar forms an anode section (18). According to the invention, each anode bridge (14) comprises a carrier beam (31) along which have been arragned, one after the other, a number of live pins (32) isolated electrically from one another and linked separately to the source of current by an individual switching device (35), in order to enable fractional electric power supply of each of the anode sections (18).

Abstract: A coiler spindle for winding a band-type product such as the material coming from a continuous casting machine which includes a central shaft rotatable about an axis and having a set of adjacent segments surrounding the shaft. Each segment is mounted to slide radially on the shaft and comprises a curved plate having an external face in the shape of a cylindrical sector. The diameter of the spindle can be changed by radial displacement of the segments. Cooling of the segments is provided by the circulation of a heat exchanger fluid along each segment from a fluid box fixed to the central shaft and having at least two separate chambers. The chambers including a supply and an evacuation chamber. Each segment is provided with its own individual cooling down system arranged within the curved plate. Each individual cooling down system includes an inlet orifice connected to the supply chamber and an outlet orifice connected to the evacuation chamber.

Abstract: An apparatus and method for pressing a rotatable ironing roll against an outermost wrap of strip material being coiled with substantially constant force and at a minimum constant distance from the tangent point of entry of the strip onto the coil, comprising an ironing roll support linearly and pivotally movable with respect to the coil, a sensor to determine a position of the ironing roll and to determine a corresponding desired roll pressure, and a cam connected to the ironing roll support and adapted to cause the ironing roll to follow a curved locus of the tangent point as the coil diameter increases.

Abstract: A splicing machine for connecting metallic bands including at least three toolings determining successively the cutting profile of both edges (m1, m2) to be connected, the welding of both edges on to one another and the flattening of the welded matter in excess. The machine includes a tool carriage (3) mounted to slide parallel to the running direction of the bands (M1, M2) on which are mounted to slide, perpendicular to the running direction, at least two supporting chassis (41, 51), each for one of the connecting toolings (4,5), a motor and a worm (32) for positioning either connecting tooling (4,5) in a common working position, by sliding the tool carriage (3) and apparatus to control the transversal sliding motion of the corresponding tooling for the actuation of the latter.

Abstract: The purpose of the invention is a reverse extruding press perfected for releasing a billet jammed in the container.According to the invention, the obturator (31) of the rear surface of the container with a thickness (e) can be replaced, by displacement transversal to the extrusion axis (10), by an extraction part (33) of the same thickness (e), fitted with a central hole (34) of the same section as that of the recess (20) of the container (2). By bringing the movable beam (3) forward, the extraction part (33) pushes the container (2) backwards as well as the rear section (53) of the billet (5) which is cleared from the recess (20) and engages into the central hole (34). The billet (5) being thus maintained, the container can be moved forward to position the pick-up means (54).

Abstract: The purpose of the invention is a treatment unit for a band product (2) comprising at least one extant treatment tub (1) connected to a mechanism (B) for controlling the running of the band product (2) inside the extant tub (1). The at least one extant treatment tub (1) is connected to at least one replacement tub (4) made of an oblong enclosure provided above the extant tub (1) and exhibiting a height (h) lower than the height (H) of the extant tub (1). The replacement tub (4) is associated with an apparatus for injecting the liquid and to the mechanism (B,B') for controlling the running of the band, so that the product (2) runs inside the replacement tub (4) in contact with the treatment liquid (A).

Abstract: A turntable coiler for reeling a strip product, comprising a frame mounted rotatably around a central axis, and at least two fixed cantilever reeling mandrels, each in the alignment of a rotation shaft mounted rotatably on two spaced centering bearings. Each mandrel is connected to a motor comprising a rotor fastened to the shaft of the mandrel, and a stator. Each mandrel, its rotation shaft with both bearings and the motor form a motor-mandrel assembly mounted in an independent chassis on which are fastened the stator of the motor and both centering bearings of the shaft carrying the rotor, and the rotary frame is provided with at least two supporting devices, connected to removable bolts for centering and fastening the chassis of the motor-mandrel assembly, in a position for which the reeling axis defined by the bearings is parallel to the central axis, and each motor-mandrel assembly thus constitutes an interchangeable module.