Abstract: The invention relates to the preparation of especially metallic or semi-metallic bands or sheets, particularly with a microcrystalline or amorphous structure. According to this process, an electrically conductive molten material is made to flow from a tank through a nozzle, to form a strip of substantially rectangular cross-section, which is subsequently solidified. According to the invention, the form of the strip of liquid material is stabilized, after it has been shaped and before solidification, as a result of a mechanical surface effect induced by an alternating magnetic field.

Abstract: The invention relates to the preparation of especially metallic or semi-metallic bands or sheets, particularly with a microcrystalline or amorphous structure. According to this process, an electrically conductive molten material is made to flow from a tank through a nozzle, to form a strip of substantially rectangular cross-section, which is subsequently solidified. According to the invention, the form of the strip of liquid material is stabilized, after it has been shaped and before solidification, as a result of a mechanical surface effect induced by an alternating magnetic field.

Abstract: The invention relates to a process for effecting a high desulphuration of a fuel gas containing sulphur issuing from the gasification of sulphurous fuels, wherein the gas is subjected to the action of vapors of manganese and/or zinc and/or oxides thereof (in the form of aerosols) while it is at a temperature ranging from 1 600.degree. C. to 350.degree. C.

Abstract: A sheet of metal of given thickness is press-formed to provide a part having a substantially constant thickness on a double action press. The sheet to be formed is disposed on a support. A first outer slide, or blank holder is applied on the peripheral portion of the sheet. A second central slide is applied on the central portion of the sheet. The peripheral portion of the sheet is formed while allowing it to slide under the blank holder, by displacing relative to said support at least one active part of the outer slide so as to compensate, in certain regions of the finished part, for excess areas of the sheet, for the given thickness of said sheet, relative to the volume of metal to be formed, and displacing simultaneously with the displacement of the part the central slide so as to shape angular volumes of the central portion of the sheet by application of the sheet against the surfaces of the central part of the support.

Abstract: The process controls the cooling of a metal sheet so as to impart thereto a predetermined crystalline structure. The sheet to be cooled is passed through a case containing a mass of regularly renewed cooling fluid. The flow of the cooling fluid is controlled as a function of the inlet temperature of this fluid, in accordance with the thickness of the sheet to be cooled and the desired cooling rate.

Abstract: The installation comprises mainly a reactor (1) for the gasification of powdered coal on a bath (2) of liquid iron, a cooling flue (9) constituting a boiler connecting the outlet of the reactor (1) to a vapor superheater (11) fed with vapor (26) issuing from the boiler, a dust-removing cyclone (13) connected to the outlet of the superheater (11), a thermal exchanger (14) connected to the outlet of the cyclone (13) in which a drying fluid (31, 32)is heated by thermal exchange with the combustible gas, a conditioning tower (16) connected to the outlet of the thermal exchanger, the conditioning tower being connected to a dry electrofilter (17) which feeds a storage gasometer (20) through a three-way valve (21). The heated drying fluid (32) and the vapor (28,30) issuing from the superheater (11) are employed in the installation for preparing and conveying the fuel and the comburent fed to the reactor.

Abstract: The invention concerns a method for in particular repairing the region of the pouring apertures of a blast-furnace which mainly comprises employing a support element (10) independent of the casing (3) and on which bear the blocks (17) of refractory material. The support element (10) is first of all positioned relative to these blocks and then fixed in the final position relative to the casing (3), after which there is welded around the support element (10) and to the casing a sheet of metal which provides the seal between the support element and the casing.

Abstract: The invention relates to the preparation of especially metallic or semi-metallic bands or sheets, particularly with a microcrystalline or amorphous structure.According to this process, an electrically conductive molten material is made to flow from a tank through a nozzle, to form a strip of substantially rectangular cross-section, which is subsequently solidified. According to the invention, the form of the strip of liquid material is stabilized, after it has been shaped and before solidification, as a result of a mechanical surface effect induced by an alternating magnetic field.

Abstract: The process controls the cooling of a metal sheet so as to impart thereto a predetermined crystalline structure. The sheet to be cooled is passed through a case containing a mass of regularly renewed cooling fluid. The flow of the cooling fluid is controlled as a function of the inlet temperature of this fluid, in accordance with the thickness of the sheet to be cooled and the desired cooling rate.

Abstract: The electrode structure, embedded in a refractory lining (1) covering the wall (2) of a vessel containing the bath (5) of metal, flush at one (4) of its ends with the inner surface of the refractory lining and projecting at its other end (6) out of the vessel, is of the type comprising an electrically conductive central core (3) extending through the wall (3) of the vessel and a cooling jacket (11) disposed around the central core (3) and in close contact therewith. The feature of the electrode structure is that the central core (3) is connected by its end (6) outside the vessel to an electric supply terminal (7), the zone of the central core (3) adjacent to the outer end (6) and in facing relation to the cooling jacket (11) being electrically insulated from the cooling jacket.

Abstract: The cooling plate 1 comprises a cast iron element having substantially the shape of a parallelepiped, embedded longitudinally extending tubes 3; 103 disposed vertically and parallel to one another and extending out of said element on a first side 2b; 102b of said element, and a protective sleeve 4a, 4b surrounding portions of said tubes extending out of said element. A second side of said element opposed to said first side has a waffle shape formed by rows of bosses 8; 108 evenly spaced apart transversely of said element. The bosses of a row define projecting surfaces 9; 109 comprising substantially aligned portions of a cylinder, said cylinders having axes substantially coinciding with axes of said tubes 3.

Abstract: The process is in particular intended for the manufacture of tinplate and comprises cutting a strip in the direction transverse to the direction of rolling of a reel of steel sheet, subjecting said strip to a drawing action by compression while bending the strip, and examining possible cracking on the surface of the drawn strip. This process is carried out in an apparatus which comprises a frame 1 supporting means 2 for pulling a steel strip and a head 4 for effecting a drawing action by compression while bending the strip. The head is connected to the frame and the steel strip 3 is passed through the head under the action of the pulling means 2.

Abstract: The present invention relates to a continuous coating process by a layer of Zn, Al or of a Zn-Al alloy for a cold laminated steel band comprising a heating thermic cycle, followed by a rapid cooling, a tempered coating in the metal bath of coating in fusion, at a temperature from 460.degree. to 500.degree. C., and a subsequent cooling, characterized in that after the tempered coating, the coated steel band is subjected to an over-ageing treatment by maintaining the band at a temperature comprised between 430.degree. and 270.degree. C. during at least two minutes.This process is carried out in an installation comprising an over-ageing chamber.

Abstract: The invention relates to a process for manufacturing a strip of hot galvanized sheet steel devoid of a coating of pure Zn or a coating based on Zn on at least one side of the strip, comprising passing the strip continuously in a conventional dipping galvanization bath, wiping by pneumatic means a part of the coating of liquid Zn deposited on the strip, and subjecting at least one side of the strip to a mechanical action for completely eliminating the coating based on zinc which is not alloyed to the iron, by allowing to subsist only a thin iron-zinc alloy layer, said mechanical action on the layer of coating based on zinc which is still liquid being exerted by means of a brush at least the bristles of which are energetically cooled. The invention also provides a cooled brushing device (10) for carrying out the process.

Abstract: The process is in particular intended for the manufacture of tinplate and comprises cutting a strip in the direction transverse to the direction of rolling of a reel of steel sheet, subjecting said strip to a drawing action by compression while bending the strip, and examining possible cracking on the surface of the drawn strip. This process is carried out in an apparatus which comprises a frame 1 supporting means 2 for pulling a steel strip and a head 4 for effecting a drawing action by compression while bending the strip. The head is connected to the frame and the steel strip 3 is passed through the head under the action of the pulling means 2.

Abstract: The composite bimetallic roll for cold rolling obtained by casting comprises a heart metal constituted by a nodular or lamellar cast iron and a case metal constituted by a steel having a chromium content of 8 to 16% and a carbon content of 0.65 to 0.95%. The chromium/carbon ratio is between 11 and 16 and the structure of the case metal is martensitic with a content of residual austenite of less than 10%.

Abstract: The present invention relates to a continuous coating process by a layer of Zn, Al or of a Zn-Al alloy for a cold laminated steel band comprising a heating thermic cycle, followed by a rapid cooling, a tempered coating in the metal bath of coating in fusion, at a temperature from 460.degree. to 500.degree. C., and a subsequent cooling, characterized in that after the tempered coating, the coated steel band is subjected to an over-aging treatment by maintaining the band at a temperature comprised between 430.degree. and 270.degree. C. during at least two minutes.This process is carried out in an installation comprising an over-aging chamber.

Abstract: The object of the invention is to improve the performance of the rolls of roughing and finishing stands of a hot strip train or mill and in particular to retard as far as possible the banding phenomenon, namely the phenomenon of the incrusting of hard oxides or scale formed at the conventional rolling temperatures.For this purpose, the roll is made, at least in the working region thereof, from a chrome steel in which the ratio between the respective contents of chromium and carbon is between 7 and 12 and in which the content of equivalent carbon is between 1.5 and 1.7%. This content of equivalent carbon is calculated as the sum of the content of carbon and the content of chromium, the latter being given a coefficient 0.05.

Abstract: The device is intended to facilitate the changing of the sealing element and to increase the life of this element. The device comprises an added bar which is detachably fixed to a wall of the machine and received in a slot in this wall. The bar carries a deformable hollow body which is connected to a source of fluid under pressure and carries the sealing element.

Abstract: The device provides an arrangement of the input and output ends of the machine which is of light and cheap construction, smaller in size and allows an adaptation of the machine in accordance with the width of the product to be treated. The device comprises, for each end of the machine, at least one rigid closing shutter carried by one of the frames of the machine. Guiding devices carried by this frame ensure a displacement of the or each shutter in a direction roughly perpendicular to the plane of the sheet passing through the machine. Devices for shifting the or each shutter are provided. The or each shutter cooperates by its free edge with the other frame of the machine so as to close in a substantially sealed manner the input or output end of the machine.