EP0250341B1 - Pipes à mamelles orientables pour fours de cuisson de blocs carbonés - Google Patents

Pipes à mamelles orientables pour fours de cuisson de blocs carbonés Download PDF

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Publication number
EP0250341B1
EP0250341B1 EP87420151A EP87420151A EP0250341B1 EP 0250341 B1 EP0250341 B1 EP 0250341B1 EP 87420151 A EP87420151 A EP 87420151A EP 87420151 A EP87420151 A EP 87420151A EP 0250341 B1 EP0250341 B1 EP 0250341B1
Authority
EP
European Patent Office
Prior art keywords
pipe
axis
furnace according
chamber furnace
flanges
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP87420151A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0250341A1 (fr
Inventor
Christian Dreyer
Bernard Boffa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rio Tinto France SAS
Original Assignee
Aluminium Pechiney SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Aluminium Pechiney SA filed Critical Aluminium Pechiney SA
Priority to AT87420151T priority Critical patent/ATE46028T1/de
Publication of EP0250341A1 publication Critical patent/EP0250341A1/fr
Application granted granted Critical
Publication of EP0250341B1 publication Critical patent/EP0250341B1/fr
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B13/00—Furnaces with both stationary charge and progression of heating, e.g. of ring type or of the type in which a segmental kiln moves over a stationary charge
    • F27B13/02—Furnaces with both stationary charge and progression of heating, e.g. of ring type or of the type in which a segmental kiln moves over a stationary charge of multiple-chamber type with permanent partitions; Combinations of furnaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B13/00—Furnaces with both stationary charge and progression of heating, e.g. of ring type or of the type in which a segmental kiln moves over a stationary charge
    • F27B13/06—Details, accessories or equipment specially adapted for furnaces of this type
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S454/00—Ventilation
    • Y10S454/903—Flexible ducts used for carrying air

Definitions

  • the invention relates to an improvement to the blowing and suction pipes of ovens with open chambers called "rotating fire” or “fire advancement” for cooking carbonaceous blocks (anodes or cathodes) intended in particular for production tanks of aluminum by the Hall-Héroult process, but also carbon blocks of all types generally intended for electrometallurgical furnaces.
  • carbon block any product obtained by shaping a carbon paste, and intended, after baking, for use in electrometallurgy ovens.
  • the carbon anodes intended for aluminum production tanks by electrolysis of alumina dissolved in molten cryolite are obtained by forming a carbonaceous paste resulting from the kneading, at approximately 120 to 200 ° C., of a mixture of pitch and ground coke. After shaping, the anodes are baked for a hundred hours at a temperature of the order of 1,100 to 1,200 ° C.
  • Other types of carbon blocks are obtained by the same process.
  • This type of oven has two parallel spans, the total length of which can reach more than a hundred meters.
  • Each span comprises a succession of chambers, separated by transverse walls and open at their upper part, to allow the loading of the raw blocks and the unloading of the cooled cooked blocks.
  • Each chamber comprises, arranged parallel to the major axis of the oven, a set of hollow partitions, with thin walls, in which the hot gases ensuring the cooking will circulate, alternating with cells in which the baking blocks are stacked which will then be embedded in carbonaceous dust (coke, anthracite or ground carbonaceous residues or any other powdery packing material).
  • carbonaceous dust coke, anthracite or ground carbonaceous residues or any other powdery packing material
  • the hollow partitions are provided, at their upper part, with closable openings called “openers”; they also include baffles to lengthen and distribute the path of the combustion gases more uniformly.
  • the heating of the oven is ensured by burner ramps, having a length equal to the width of the chambers, and the injectors of which are placed on the openings of the chambers concerned. Upstream of the burners (relative to the direction of advance of the fire), there is a combustion air blowing pipe, and, downstream, a suction pipe for the burnt gases.
  • the heating is ensured both by the combustion of the injected fuel (gas or fuel), and by that of the pitch vapors emitted by the blocks during cooking.
  • the blowing pipe-burner-suction pipe assembly is advanced, for example every 24 hours, each chamber thus ensuring, successively, the loading functions of the raw carbon blocks, natural preheating (by combustion gases), forced preheating and cooking at 1,100-1,200 ° (so-called full fire area), cooling of carbonaceous blocks (and preheating of combustion gases), unloading of cooked carbonaceous blocks, possible repairs, and resumption of a new cycle.
  • the object of the invention is a pipe - which can function both as a blowing pipe as a suction pipe - each of the teats is made orientable and adjustable in height so that at the time of placement on a new chamber we can easily and quickly orient each udder by rotation, from so that the axis of the lower part of each udder coincides substantially with the axis of the corresponding opening and adapts contiguously to this opening, with height adjustment by sliding if necessary.
  • the object of the invention is a pipe for chamber furnaces intended for cooking carbonaceous blocks for the production of aluminum, this pipe comprising a main body provided with a plurality of nozzles to which connect tubing called "udders in a number equal to that of the lines of heating partitions constituting the partitions of the rooms, each of these udders having to adapt to the openings called" openings "arranged at the top of each heating partition or transverse walls separating the different chambers from the oven.
  • each udder is constituted by at least two tubular elements, arranged in series, a first element provided on the one hand, at its upper part, with a flat flange which cooperates in contiguous relation and in rotation, with a flat flange disposed at the lower part of the nozzle, and on the other hand, at its lower part, a flat flange, in contiguous relation, and in rotation, with a flat flange disposed at the upper part of the second element, the first and the second element having at least over part of their height, an axis inclined at an angle a with respect to the axis perpendicular to the plane of the flanges.
  • the plane flanges are parallel to each other and parallel to the plane containing the openings which is normally a horizontal plane.
  • each udder further comprises a third tubular element in contiguous relation by sliding partial insertion and coaxial with the lower part of the second element, the lower part of this third element adapting in tight relation on the 'workman.
  • the horizontality defects are absorbed by the play at the interlocking of the third tubular element.
  • the height adjustment is coupled to one of the rotation adjustments of the udder by a connecting rod / crank system simultaneously allowing the rotation of the second element around the flange and the sliding of its lower part.
  • FIGS 1 and 2 recall, for a good understanding of the invention, the structure of a conventional chamber oven to which the present invention applies: in the section of Figure 1, we see the partitions (1), connected at their upper part by the "udders" ( 2 ) to the pipe (3) itself connected to the general manifold (4).
  • the blowing and suction pipes can be, depending on the case, connected to the rooms of the rooms or to the rooms of the transverse walls (9) according to our patent FR 2 535 834.
  • the carbon blocks (6 ) visible on the cutaway of the left side of figure 2.
  • baffles (7) of the heating partitions The purpose of the baffles (7) of the heating partitions is to lengthen the path of the hot gases and to homogenize the temperature in the partition.
  • the closable openings (8) allow the installation of the burner ramps (not shown), blow pipes or air suction pipes (3), and, in some cases, measuring devices (thermocouples, depressometers).
  • the successive chambers are separated by transverse walls (9).
  • the main axis of the oven is indicated by line XX '.
  • Each udder (2) of the suction pipe (3) is connected to an opening (8) of a given chamber, in tight relation.
  • the upper part of the udder is connected to the pipe (3) by a nozzle (10) in which is generally disposed a movable flap (11) which allows, by its rotation about an axis (11A) to regulate the flow in each series of chambers (5).
  • the vertical part of the udder which enters the opening is made orientable so that the axis (12) of the lower part substantially coincides with the axis (13) of the opening considered.
  • the orientable udder (14) makes it possible to make up for a deviation of ⁇ 50 mm in eccentricity (X and Y axes) and a deviation of ⁇ 50 mm in height (Z axis), these figures being given as example and not constituting a limitation of the invention.
  • the lower element (17) presses on a groove (30) at the periphery of. the boy.
  • This groove may include a seal (29) resistant to high temperatures, for example in braided or felted mineral fiber.
  • the element (17) can be secured by tie rods, the lower part of which is sealed in the masonry of the furnace.
  • the support of the element (17) takes place on a peripheral relief (32) of the opening (8) by means of a double flexible seal (43).
  • the intermediate element (16) and the lower element (17) cooperate by a fitting (33) which makes it possible to make up for a difference in level (dimension Z) between the inlet of the opening and the lower part of the orientable udder (14).
  • the flanges and counter flanges (19) (20) and (27) (30) are pierced with holes for the passage of bolts, so as to maintain the cohesion of the assembly.
  • the free rotation of the assembly is ensured by a thick lubricant (grease) for high temperature injected into the space between the flanges, by means of grease fittings (21) (22).
  • the intermediate element (16) further comprises an operating device, constituted by a double rod-crank system, which makes it possible to simultaneously align the axes (13) and (12) in Y, that is to say ie along the transverse axis of the furnace, while maintaining or retouching the alignment in X.
  • This operating device formed symmetrically with respect to a plane passing through the axis (28), comprises an axis (38) passing diametrically through the element (16A), supporting at its two ends a disc (37A) (37B ) provided with a radial operating handle (38A, 38B) and, is connected by a hinge (43A, 43B) not coincident with the axis (38), at the upper end of a link (40A, 40B) , the lower end of which comprises a hinge (39A, 39B) fixed to the lower element (17).
  • FIG. 6 is a section of FIG. 3 passing through the axis (38) and, in a plane perpendicular to FIG. 3.
  • the operation of the device according to the invention is as follows: the lower element (17) being raised to the maximum, the suction pipe is put in place, and the operator spots any deviations between the axis (13), of each workpiece, and the axis (12) of the lower element (17).
  • This axis (12) can also be materialized by a rigid metal rod supported by three spacers.
  • the operator by acting on the handles (31) realizes the alignment of the axes (13) and (12) in X, that is to say along the major axis of the oven; then acting on the handles 38A and 38B, it realizes the alignment of the axes (13) and (12) in Y, that is to say along the transverse axis of the furnace, while maintaining or retouching the alignment at X.
  • the axes (13) and (12) being aligned, it only remains to operate the adjustment along the Z axis, that is to say to lower the lower element ( 17) until contact with the groove of the opening (8).
  • the element (16A) has been rotated by an angle so as to compensate for the deviation "e", in Y of the axis (13) of the workpiece with the axis (23) of the nozzle (10).
  • the invention is not limited to the embodiment of the connecting flanges between the elements (10) (15), (15) (16) or the fitting between (16) (17). Any equivalent means making it possible to ensure rotation keeping the tight junction and a height adjustment also keeping the tight junction is part of the invention.
  • the determination of the angle a can be carried out by use from simple geometrical considerations, by considering on the one hand the height of the inclined axis part of the udder and the eccentricity deviation to be made up ( of the order of 50 mm, and beyond if necessary).
  • the device allowing simultaneously to lower the lower part of the udder and to ensure its rotation increases the ease and the precision of the handling, and thus guarantees the best possible tightness of the connections of the pipes of admission or blowing, on the openings .

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Furnace Details (AREA)
  • Ceramic Products (AREA)
  • Carbon And Carbon Compounds (AREA)
  • Tunnel Furnaces (AREA)
  • Baking, Grill, Roasting (AREA)
  • Supports For Pipes And Cables (AREA)
  • Working-Up Tar And Pitch (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Devices For Use In Laboratory Experiments (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Vending Machines For Individual Products (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Gasification And Melting Of Waste (AREA)
  • Fats And Perfumes (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
EP87420151A 1986-06-17 1987-06-12 Pipes à mamelles orientables pour fours de cuisson de blocs carbonés Expired EP0250341B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87420151T ATE46028T1 (de) 1986-06-17 1987-06-12 Einstellbare beschickungsrohre fuer oefen zum brennen von kohlenstoffhaltigen bloecken.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8608988A FR2600151B1 (fr) 1986-06-17 1986-06-17 Pipes a mamelles orientables pour fours de cuisson de blocs carbones
FR8608988 1986-06-17

Publications (2)

Publication Number Publication Date
EP0250341A1 EP0250341A1 (fr) 1987-12-23
EP0250341B1 true EP0250341B1 (fr) 1989-08-30

Family

ID=9336552

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87420151A Expired EP0250341B1 (fr) 1986-06-17 1987-06-12 Pipes à mamelles orientables pour fours de cuisson de blocs carbonés

Country Status (16)

Country Link
US (1) US4744749A (enrdf_load_stackoverflow)
EP (1) EP0250341B1 (enrdf_load_stackoverflow)
KR (1) KR880000766A (enrdf_load_stackoverflow)
CN (1) CN1008941B (enrdf_load_stackoverflow)
AT (1) ATE46028T1 (enrdf_load_stackoverflow)
AU (1) AU585821B2 (enrdf_load_stackoverflow)
BR (1) BR8703032A (enrdf_load_stackoverflow)
CA (1) CA1317420C (enrdf_load_stackoverflow)
DE (1) DE3760517D1 (enrdf_load_stackoverflow)
FR (1) FR2600151B1 (enrdf_load_stackoverflow)
GR (1) GR3000139T3 (enrdf_load_stackoverflow)
IN (1) IN166066B (enrdf_load_stackoverflow)
NO (1) NO168609C (enrdf_load_stackoverflow)
OA (1) OA08614A (enrdf_load_stackoverflow)
SU (1) SU1561831A3 (enrdf_load_stackoverflow)
YU (1) YU45823B (enrdf_load_stackoverflow)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4842511A (en) * 1987-12-28 1989-06-27 Aluminum Company Of America Carbon baking furnace--refractory construction
US5020766A (en) * 1989-03-24 1991-06-04 Elerth Persson Sound and vibration damper
FR2777072B1 (fr) * 1998-04-03 2000-05-19 Pechiney Aluminium Procede et dispositif de regulation des fours de cuisson a feu tournant
FR2825455B1 (fr) * 2001-05-30 2003-07-11 Pechiney Aluminium Procede et dispositif de refroidissement des alveoles d'un four a chambres
CN103930741B (zh) * 2011-09-08 2016-02-10 索里斯卡彭公司 优化焙烧碳块用环形炉隔墙线路中燃烧的方法和装置
EP2807438B1 (de) 2012-01-25 2016-08-10 INNOVATHERM Prof. Dr. Leisenberg GmbH + Co. KG Verfahren zum betrieb eines anodenbrennofens und steuerungsvorrichtung
CN104697332A (zh) * 2013-12-05 2015-06-10 谭美俊 一种移动、调节方便的分段式生产炉
WO2018157128A1 (en) * 2017-02-27 2018-08-30 Washington University Burner and boiler/furnace for pressurized oxy-combustion boilers and furnaces

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR540621A (fr) * 1915-03-16 1922-07-13 Gehnrich Indirect Heat Oven Co Four sectionnel transportable
US2775927A (en) * 1953-04-23 1957-01-01 Pyle National Co Ventilating apparatus
DE1939185A1 (de) * 1969-08-01 1971-02-11 Denver Fire Clay Co Brennofen
US3633886A (en) * 1970-04-20 1972-01-11 Owens Corning Fiberglass Corp Heating furnaces
IT1073727B (it) * 1976-05-05 1985-04-17 Elettrocarbonium Spa Perfezionamento nei forni continui ad anello per la cottura o ricottura di materiali carboniosi
US4253823A (en) * 1979-05-17 1981-03-03 Alcan Research & Development Limited Procedure and apparatus for baking carbon bodies
US4310301A (en) * 1980-11-19 1982-01-12 Midland-Ross Corporation Combination burner and exhaust gas recirculation system for a carbottom furnace
FR2515799B1 (fr) * 1981-10-29 1986-04-04 Pechiney Aluminium Dispositif de chauffage pour fours de cuisson ouverts a feu tournant et procede de mise en oeuvre de ce dispositif
NO152029C (no) * 1982-11-05 1985-07-17 Ardal Og Sunndal Verk Ringkammerovn og fremgangsmaate for drift av denne
FR2535834B1 (fr) * 1982-11-09 1987-11-06 Pechiney Aluminium Four a chambres ouvertes pour la cuisson de blocs carbones, comportant une pipe de soufflage
IT1178520B (it) * 1984-09-28 1987-09-09 Alusuisse Italia Spa Procedimento e forno a tunnel per la calcinazione di corpi carboniosi, in particolare di elettrodi

Also Published As

Publication number Publication date
EP0250341A1 (fr) 1987-12-23
CA1317420C (fr) 1993-05-11
NO872507L (no) 1987-12-18
IN166066B (enrdf_load_stackoverflow) 1990-03-10
CN87104248A (zh) 1988-01-27
US4744749A (en) 1988-05-17
SU1561831A3 (ru) 1990-04-30
NO872507D0 (no) 1987-06-16
AU585821B2 (en) 1989-06-22
OA08614A (fr) 1988-11-30
FR2600151B1 (fr) 1988-08-26
NO168609C (no) 1992-03-11
BR8703032A (pt) 1988-03-08
ATE46028T1 (de) 1989-09-15
YU45823B (sh) 1992-07-20
YU110087A (en) 1989-08-31
CN1008941B (zh) 1990-07-25
KR880000766A (ko) 1988-03-29
GR3000139T3 (en) 1990-11-29
FR2600151A1 (fr) 1987-12-18
AU7427487A (en) 1987-12-24
NO168609B (no) 1991-12-02
DE3760517D1 (en) 1989-10-05

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