The invention relates to a method for regulating a so-called "rotating-fire" multiple-chamber furnace for baking carbonaceous blocks (5), wherein the furnace comprises means (P3, P4, P5, P6, Pzpr) for determining, directly or indirectly, the heating pressure in the heating area (B), the method comprising a step of regulating the pre-heating temperature (T1) in order to comply with an instruction while maintaining the suction flow rate (Q0) within a predetermined range around a set point and while maintaining the lower heating pressure at a minimum threshold value.
Method for the pulsed injection of gaseous fuel by means of at least one injector (30) having at least one outlet orifice able to deliver at least one jet of gaseous fuel and placed in a corresponding port (11) in at least one hollow partition (7) of a furnace with chambers of the "rotary flame" type intended for curing carbon-containing blocks at a mean flow rate of said gaseous fuel to said at least one outlet orifice of said injector (30) of between 5 m/s and 80 m/s along the axis of said at least one jet and advantageously of between 10 m/s and 50 m/s, so as to reduce the formation of oxides of nitrogen and improve the distribution of heat along the walls of the hollow partitions (7) of the furnace and therefore the homogeneity of the curing of the carbon-containing blocks.
The invention relates to a method for optimising combustion in partition lines of a so-called rotary-burner chamber kiln for firing carbon blocks, said kiln comprising heating chambers, the fuel required for firing the carbon blocks being partially injected by at least two heating manifolds (16) directly controlled by a master controller (42a, 42b), which controls the inputs/outputs of said manifolds (16), the method including the automatic identification, by the master controller (42a, 42b), of the relative position of one manifold relative to the others when said manifold is connected to the grid, and the operation of the injectors of the heating manifolds (16) being organised by distributing the operating sequences of the injectors individually over time.
F27B 13/14 - Arrangement of controlling, monitoring, alarm or like devices
C04B 35/52 - Shaped ceramic products characterised by their composition; Ceramic compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxides based on carbon, e.g. graphite
C21D 11/00 - Process control or regulation for heat treatments
The invention relates to a method and device for preparing a paste by means of blending or mixing materials, in particular for making aluminum production electrodes. The method includes the following operations: a) introducing the materials to be blended or mixed into a vat (31) having an inner surface extending along a substantially horizontal axis of revolution (X), b) rotating the vat (31) about the axis of revolution (X) and urging the materials via centrifugation against the inner surface of the vat (31), and c) locally dislodging the centrifuged materials from the inner surface by rotating the vat (31) and causing same to fall onto a crumbling tool (40).
The invention relates to a method including a series of tests consisting of totally stopping the injection of fuel, one line of partitions (6) after the other, without any activity on the lines of partitions (6) other than that of the test, calculating the variation between the measurements of an image parameter of the total content of unburnt material in the combustion gases before and after totally stopping the injection in each tested line of partitions (6), and identifying any line of partitions (6) as having incomplete combustion if said variation is greater than x% of the initial value of said image parameter at the start of the corresponding test, x% preferably being between 5% and 10%.
The invention relates to a back-pressure device (12) for a vibrocompacting device, particularly for forming molded carbon blocks, including: at least one mold that is open on two top and bottom horizontal surfaces thereof and securable to a vibrating table forming the bottom of the mold and subject to vibrations by an actuating means; a pressing weight (3) capable of being placed in the mold; and a cover (13) capable of sealingly closing the top surface of the mold. Said back pressure device (12) is characterized in that it does not have a central cylinder stack and includes two stacks (16) or sets of stacks of inflatable cylinders (17a, 17b) that are symmetrically and laterally eccentric on both sides of the central vertical axis (VV) that engages with a guide means (18) that is suitable for each stack (16), the top end of the top cylinder (17a) and the bottom end of the bottom cylinder (17b) of each stack (16) being respectively secured to the cover (13) of the pressing weight (3). The invention also relates to a vibrocompacting device provided with a back pressure device according to the invention.
B30B 11/02 - Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses or tabletting presses using a ram exerting pressure on the material in a moulding space
B30B 1/08 - Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by lever mechanism operated by fluid-pressure means
7.
LOCKING DEVICE FOR A VIBROCOMPACTING DEVICE, AND COMPACTING DEVICE PROVIDED WITH SUCH A LOCKING DEVICE
The invention relates to a vibrocompacting device, in particular for forming molded carbon blocks, including: at least one tubular mold (1) with vertical axis and which is securable to a vibrating table (2) that forms the bottom of the mold, and which is capable of being vibrated by an actuating means (5); a pressing weight (3) capable of being inserted into the mold (1) through the top end thereof; and a cover (13) capable of closing said mold (1) at the top end thereof. Said device is characterized in that it comprises a means for controlling and locking the mold (1) onto the vibrating table (2) and a means for locking the cover (13) onto the mold (1), said means being combined and consisting of at least one actuating means (100) including a stationary portion (101) secured to the vibrating table (2) and a mobile portion (102), one end of which engages with a mobile member (103, 118) capable of engaging with a stationary member (110; 121) secured to the cover (13), and with a stationary member (107) secured to the mold (1).
The invention relates to a method that comprises defining a variable Rx representative of the smoke flow in an x-rank partition (6) in the chamber (2) of an oven (1), defining a confidence interval of the population of R variables of at least several partitions (6) ranking from 1 to n in the chamber (2), with the exclusion of Rx, from an average m and a typical deviation σ of the R variables, checking at consecutive moments if Rx is outside the F confidence interval by a lower value and, if such is the case, providing an alarm signal indicative of an at least partial clogging of at least one partition (6) in the partition line to which the x-rank partition (6) belongs and/or controlling at least one modification of the operational adjustment of the oven (1). The invention can be used for detecting clogged hollow partitions in a so-called rotating-heat chamber oven.
F27B 13/02 - Furnaces with both stationary charge and progression of heating, e.g. of ring type, of type in which segmental kiln moves over stationary charge of multiple-chamber type with permanent partitions; Combinations of furnaces
F23N 5/24 - Preventing development of abnormal or undesired conditions, i.e. safety arrangements
9.
SHUTTER HAVING A SWELLABLE PERIPHERAL SEAL, AND SHUTTING SYSTEM COMPRISING IT FOR A MULTIPLE-CHAMBER FURNACE PORT
The invention relates to the field of what are called "rotating-fireball" multiple-chamber furnaces, for the firing of carbon blocks, and, more particularly, to a shutter (13) having an inflatable seal (16), for a port (8) of a hollow partition (7) in a rotating-fireball multiple-chamber furnace, characterized in that its shutter comprises: a rigid core (14), of substantially rectangular elongate shape, intended to be placed opposite a port (8) of a hollow partition (7) in said furnace, so as to shut off most of the flow area for gas entering via said port (8); and at least one inflatable air chamber (15), retracted in the deflated state in a housing for the core (14) and forming, in the inflated state, a peripheral seal (16) projecting around the perimeter of the core (14); and in that said seal (16) goes around almost its entire periphery so as to complete the shutting-off of said port (8).
F27B 13/02 - Furnaces with both stationary charge and progression of heating, e.g. of ring type, of type in which segmental kiln moves over stationary charge of multiple-chamber type with permanent partitions; Combinations of furnaces
F27B 13/06 - Furnaces with both stationary charge and progression of heating, e.g. of ring type, of type in which segmental kiln moves over stationary charge - Details, accessories, or equipment peculiar to furnaces of this type
The method of the invention is used for monitoring the state of a smoke duct (20-20') connecting each suction rail (11) of a baking furnace (FAC) (1) for carbonated blocks, of the rotating fire type and preferably with open chambers or covered chambers, to a smoke processing centre (CTF) (23) for purifying the baking smoke from the FAC (1), wherein said smoke is drawn through at least one suction rail (11) of the FAC (1) and collected in the smoke duct (20-20') feeding said smoke to the CTF (23), the method including at least the step of detecting a leak in the smoke duct (20-20') consisting of parasitic inlets of ambient air into said duct and/or at least the step of detecting a fire in said duct (20-20').
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 same with fresh reagent. The method includes at least the following steps: the flow of water in the cooling tower (24) is adjusted and/or the flow and/or recycling rate of the reagent in the reactor (25) is adjusted as a function of at least one parameter indicating the level of pollution of the fumes at the inlet of the fume treatment centre (23). The invention can be used for baking carbon cathodes and anodes for aluminium electrolysis.
F27D 17/00 - Arrangement for using waste heat; Arrangement for using, or disposing of, waste gases
F27B 13/14 - Arrangement of controlling, monitoring, alarm or like devices
B01D 53/10 - Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases or aerosols by adsorption, e.g. preparative gas chromatography with moving adsorbents with dispersed adsorbents
The invention concerns a vibrocompacting device (1), in particular for forming molded anode blocks. The device comprises at least one mold (2) borne by an oscillating table (3) secured via suspension means (4) to a frame (5). The table (3) is arranged to move relatively to the frame (5) along a vertical direction under the effect of vibratory actuating means. The invention is characterized in that the device comprises stabilizing means (6, 12) for limiting, even suppressing, pitch and/or roll of the oscillating table, including at least one torsion bar (6) arranged between the oscillating table (3) and its frame (5).
B30B 11/02 - Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses or tabletting presses using a ram exerting pressure on the material in a moulding space
13.
PRODUCT COMPACTION METHOD AND DEVICE FOR IMPLEMENTING SAME
The invention relates to a method of compacting products (2), such as a paste for forming anodes, using a compaction device (1) comprising at least one mould (3) which is intended to receive the products (2) and a vibration generator (5) which can transmit vibrations to the products (2). The inventive method consists in tamping the products (2) contained in the mould (3) by subjecting same to vibrations. According to the invention, the frequency of the vibrations is determined such as to ensure optimum tamping as a function of the energy consumed by the vibration generator (5) during a vibration tamping phase.
B30B 11/02 - Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses or tabletting presses using a ram exerting pressure on the material in a moulding space
B06B 1/16 - Processes or apparatus for generating mechanical vibrations of infrasonic, sonic or ultrasonic frequency making use of mechanical energy operating with systems involving rotary unbalanced masses
B30B 11/00 - Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses or tabletting presses
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