Abstract: A method and device for capturing SO2 present in gases originating from cells for the industrial production of aluminum by igneous electrolysis, implemented over a group of at least two reactors passed through in parallel by a gas stream and supplied with a powdered sorption agent capable of adsorbing effluents present in the gas stream by placing the sorption agent in contact with the gas stream, each reactor having collection elements for collecting the sorption agent after contact with the gas stream, at least one of the reactors having discharge elements for discharging the sorption agent after contact with the gas stream to injection elements for injecting into at least another one of the reactors; and desorbing elements located between the discharge elements and the injection elements, for desorbing the SO2 adsorbed by the sorption agent before it reaches the discharge elements.

Abstract: A method and device for capturing SO2 present in gases originating from cells for the industrial production of aluminum by igneous electrolysis, implemented over a group of at least two reactors passed through in parallel by a gas stream and supplied with a powdered sorption agent capable of adsorbing effluents present in the gas stream by placing the sorption agent in contact with the gas stream, each reactor having collection elements for collecting the sorption agent after contact with the gas stream, at least one of the reactors having discharge elements for discharging the sorption agent after contact with the gas stream to injection elements for injecting into at least another one of the reactors; and desorbing elements located between the discharge elements and the injection elements, for desorbing the SO2 adsorbed by the sorption agent before it reaches the discharge elements.

Abstract: The invention relates to a method for controlling a fume treatment center (FTC) (23), scrubbing the baking fumes from a rotary baking furnace (1), in which the fumes are drawn in through at least one suction manifold (11) of the baking furnace (1) and collected in a duct (20, 20?) that conveys said fumes to the fume treatment center (23). The fume treatment center includes a tower (24) which sprays water into the fumes in order to cool same and a least one reactor (25) for the physico-chemical neutralization of the fumes, comprising contact with a reagent powder, such as alumina, followed by filtering (36) of the loaded reagent and the fume dust and recycling in the reactor (25) of at least one fraction of the filtered reagent and mixing of the same with fresh reagent.

Abstract: The method of the invention is used for monitoring the state of a smoke duct connecting each suction rail of a baking furnace (FAC) for carbonated blocks, of the rotating fire type and preferably with open chambers or covered chambers, to a smoke processing center (CTF) for purifying the baking smoke from the FAC, wherein said smoke is drawn through at least one suction rail of the FAC and collected in the smoke duct feeding said smoke to the CTF, the method including at least the step of detecting a leak in the smoke duct consisting of parasitic inlets of ambient air into said duct and/or at least the step of detecting a fire in said duct.

Abstract: The invention relates to a method for controlling a fume treatment centre (FTC) (23), scrubbing the baking fumes from a rotary baking furnace (1), in which the fumes are drawn in through at least one suction manifold (11) of the baking furnace (1) and collected in a duct (20, 20?) that conveys said fumes to the fume treatment centre (23). The fume treatment centre includes a tower (24) which sprays water into the fumes in order to cool same and a least one reactor (25) for the physico-chemical neutralisation of the fumes, comprising contact with a reagent powder, such as alumina, followed by filtering (36) of the loaded reagent and the fume dust and recycling in the reactor (25) of at least one fraction of the filtered reagent and mixing of the same with fresh reagent.

Abstract: The method of the invention is used for monitoring the state of a smoke duct connecting each suction rail of a baking furnace (FAC) for carbonated blocks, of the rotating fire type and preferably with open chambers or covered chambers, to a smoke processing centre (CTF) for purifying the baking smoke from the FAC, wherein said smoke is drawn through at least one suction rail of the FAC and collected in the smoke duct feeding said smoke to the CTF, the method including at least the step of detecting a leak in the smoke duct consisting of parasitic inlets of ambient air into said duct and/or at least the step of detecting a fire in said duct.

Abstract: A group of at least two gas-flow reactors (21, 22, 2?2, . . . , 2n, 2?n) preferably with an ascending gas flow (3), are supplied in parallel with gas and with a chemical neutralization and/or sorption agent of the pulverulent material type capable of adsorbing effluents present in the gas flow by bringing the chemical neutralization and/or sorption agent in contact with the gas flow, the at least two reactors having elements (10) for collecting the chemical neutralization and/or sorption agent after contact with the gas flow. At least one of the two reactors has elements (11) for discharging the chemical neutralization and/or or sorption agent, after contact with the gas flow, these discharge elements being connected to the collecting elements, and members (7, 16) for injecting the chemical neutralization and/or sorption agent into at least one other of the at least two reactors.

Abstract: A group of at least two gas-flow reactors (21, 22, 2?2, . . . , 2n, 2?n) preferably with an ascending gas flow (3), are supplied in parallel with gas and with a chemical neutralization and/or sorption agent of the pulverulent material type capable of adsorbing effluents present in the gas flow by bringing the chemical neutralization and/or sorption agent in contact with the gas flow, the at least two reactors having elements (10) for collecting the chemical neutralization and/or sorption agent after contact with the gas flow. At least one of the two reactors has elements (11) for discharging the chemical neutralization and/or or sorption agent, after contact with the gas flow, these discharge elements being connected to the collecting elements, and members (7, 16) for injecting the chemical neutralization and/or sorption agent into at least one other of the at least two reactors.

Abstract: The invention relates to a method and a device for stabilizing high speed running along a longitudinal direction, of a band (4) applied on a rotary surface (3) and along which a portion of the surrounding air forms a boundary layer (43) trapped with the band (4). According to the invention, a deflecting member (5) is placed in the dihedron (G) between the band (4) and the rotary surface (3). Said deflecting member (5) has a face (50) directed toward the band which is tilted with respect thereto and is fitted with at least one orifice (55) emerging into an inner space (51) provided inside said deflecting member (5) and connected to an outer zone.

Abstract: The invention relates to a method and a device for stabilising high speed running along a longitudinal direction, of a band (4) applied on a rotary surface (3) and along which a portion of the surrounding air forms a boundary layer (43) trapped with the band (4).

Abstract: The invention relates to a method of and a device for detecting the flatness of a metal band product at high temperature, using a measuring roll (1) having a cylindrical external face (13) comprising an angular contact sector with the band and a free sector. According to the invention, the roll (1) is cooled down forcibly by circulating a heat exchanging fluid along at least one portion of the free sector of the external face (13) of the roll (1) and one determines the parameters responsible for the cooling efficiency such as the opening angle (B) of cooling sector, the temperature and the circulation flow rate of the heat exchanging fluid, so that the external face (13) of the roll (1) is brought back, at each revolution, to a pre-set equilibrium temperature. The invention applies especially to the hot rolling of ferrous and non-ferrous metals.

Abstract: The object of the invention is a process for detecting latent flatness defects in a band product (2) applied under tensile load to an angular sector (A) of measuring roll (1) comprising a plurality of detection zones (4) spaced apart each comprising a transmission sensor (3), at each rotation, of a measurement signal having a value under load (i) which is compared, at each rotation, with a reference value, in order to assess, in each longitudinal zone of the band (2), information representative of the tensile load applied in this zone.

Abstract: The invention relates to a method for thermal control of the profile of a roll in a mill by spraying, over a cooled zone (4) of the roll (1), a series of jets of fluid (J), each forming an oblong impact surface (S). According to the invention, the distance (a) between the middle axes of the impact surfaces (S) is caused to vary in relation to the position of the said impact surfaces over the length of the cooled zone (4) so that the said zone comprises a central zone (41, 43) with a substantially constant pitch and whereas two transition zones (44) extend on either side of the central zone at least up to two edges (13) of the band (M) and in which the spacing between the middle axes of the impact surfaces (S) is reduced with respect to the constant pitch (a) of the central zone (41, 43).

Abstract: The object of the invention is a process for detecting latent flatness defects in a band product (2) applied under tensile load to an angular sector (A) of measuring roll (1) comprising a plurality of detection zones (4) spaced apart each comprising a transmission sensor (3), at each rotation, of a measurement signal having a value under load (i) which is compared, at each rotation, with a reference value, in order to assess, in each longitudinal zone of the band (2), information representative of the tensile load applied in this zone.

Abstract: The invention relates to a method of and a device for detecting the flatness of a metal band product at high temperature, using a measuring roll (1) having a cylindrical external face (13) comprising an angular contact sector with the band and a free sector.

Abstract: The invention relates to a method for thermal control of the profile of a roll in a mill by spraying, over a cooled zone (4) of the roll (1), a series of jets of fluid (J), each forming an oblong impact surface (S).