• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to automation of an electrolytic method for producing aluminum, and is intended to regulate the supply of additional solid electrolyte to an electrolytic bath for the production of aluminum by electrolysis of alumina. The purpose of the invention is to stabilize the loading mode and the melt level in the bath. The device consists of sensors controlling the movement of the anode and the stem of the supply mechanism, sensors for the height of the metal layer and the HM + HB electrolyte, a feeder with a metering unit for loading the crushed electrolyte and a control device in the form of a microprocessor unit. The load control is carried out by the microprocessor according to the magnitude of the deviation of the metal level from the specified value. The calculation of the electrolyte level is performed based on the results of monitoring the movement of the anode and the power supply stem, the height of the HM + HB level, and also the calculation of the thickness of the metal level using constants corresponding to the design values of the electrolyzer relative to which the calculations are performed. 1 sec. and 6 hp ff, 6 ill.
    公开号:SU1597109A3
    申请号:SU884355595
    申请日:1988-04-20
    公开日:1990-09-30
    发明作者:Сюльмонт Бенуа；Патернога Ален
    申请人:Алюминиюм Пешинэ (Фирма)；
    IPC主号:
    专利说明:

    electrolyte with a bore 6 for loading the raw material, a tip 7 of a doeator stem, a rod 8, a ram punching cylinder 9, a cylinder displacement sensor 10, an anode assembly II for fastening the feeder, a sliding contact 12, moving the stem 8, a low-resistance resistor 13, the node 14 for connecting the resistor to the cathode of FIG. 1 The concepts are as follows: the distance between the cathode and the anode node; the distance between the anode assembly and the stem tip in the upper position; the amount of movement of the rod tip from the upper fixed position until it touches the melt. The device also contains a feeder for charging the crushed electrolyte, which contains a hopper 15 for crushed electrolyte, an alumina feeder 16, a feeder punch 17, a dispenser 18, a feeder housing 19. The crushed electrolyte bunker 20 is placed in the hermetic casing 21, and its discharge device 22 is installed near the alumina feeder 23 above the hole 6. The design of the feeder dispenser 18 allows it to be completely empty from the crushed electrolyte, which is 0-6 mm or 0- "The feeder feeder contains a plate 24 fixed on the base of the hopper 15, for example, with bolts. Under the plate, a bucket metering device 25 is fixed, consisting of a tubular body, the capacity of which can contain a mass of crushed cryolite from 0.5 to 5 kg, for example 2 kg. The bottom part 26 of the metering unit is connected to the guide tube by the device 22, which is located above the opening 6. The top part 27 is connected to the hopper, the rod 28 is connected at one end to the piston of the power cylinder 29 and at the other end of the rod located in the tanker capacity of the metering device, two dampers are made of elastic material; bottom 30 and top 31 The dispenser is designed in such a way that the distance d between the flaps is less than the distance dj between the upper and lower openings of the dispenser.
    The rod 28 is moved in the housing. 21 guide 32 with low friction, which eliminates the ingress of crushed electrolyte into the housing 21,
    For measuring the height of the metal layer H, the following parametrolite and metal layer are used to refine the metal layer and determine the height ry: DSC is the distance between the anode node 11 and the anode frame 33, which is moved when adjusting the distance between the anode and cathode. (The magnitude of the displacement of the anode is recorded by a potentiometric sensor 34); DCPA is the distance between the anode frame 33 and the bottom of the anode 4A, (the value is known because the burning rate of the anode is constant); DAM is the distance between the anode base and the metal surface (constant value during the normal process period). The dosing control system consists of a microprocessor device 35, a melt level measurement unit 36, unit 37. comparison, unit 38 for calculating the amount of electrolyte injected, controlled unit 39, the device 40 alarm excess electrolyte, the external unit 4 of the amount of electrolyte injected. The operation of the device is based on the following. In an electrolytic bath for optimal process management, i.e. In order to distribute alumina quickly and evenly, it is necessary to maintain the required volume - the electrolyte level. Therefore, it is necessary to periodically control the position of the electrolyte surface relative to a fixed level and to control the position of the electrolyte-liquid cathode interface layer of the aluminum. Maintaining a given volume of electrolyte at low levels is accomplished by adding solid NajAlF cryolite to the electrolyte, which is recycled back to the process. The invention consists in indirectly measuring the height of the melt electrolyte layer by measuring relative to the base point (cathode assembly) the total height of the electrolyte electrolyte layer from the difference in total height and the height of the metal layer.
    The height of the melt layer is determined by the expression:
    HB (DI-D2-D3) -NM, (1)
    and the height of the metal layer by the expression
    (DSC - (- DCPA + DAM), (2)
    A sensor 10 and a potentiometric circuit on a 13 R resistor are used to determine the overall height of the electrolyte and metal layer.
    In the maximum position of the rod 8 of the cylinder 9, the sensor 10 and the potential on the resistor 13 are zero. When moving the rod down until the moment when the tip 7 of the electrolyte touches, the magnitude of the movement D3 of the rod 8 is counted, and the moment of contact is recorded by the presence of a potential jump on the resistor 13 R and the reading of the movement of D3 by the sensor 10 stops.
    The readings of the sensor 10 and the potential value UR of the resistor 13 R are entered into the microprocessor unit 35 of the control unit. In addition, the constant contacts D2 and D3 are entered into the block 36. Thus, the presence of the measured value of D1 and constant constants makes it possible to determine the total height of the metal and electrolyte HM + HB. As follows from (1) I, in order to determine the RB, it is necessary to calculate the value of HM. The magnitude of the NM is calculated as follows. In the process of moving the anode, when adjusting the distance between the anode and cathode, the potentiometer sensor 34 measures the DSC distance. The distance between the anode frame and the bottom of the anode of the DCPA is a constant value, which is determined by the rate of combustion of the anode. The interpolar distance DAM for this bath design is also a known value. Using the DSC values measured by the sensor 34, the known DCPA and DAM values, and also the measured 10 sensor values D1 in block 36 of the microprocessor, the metal level of the NM is calculated, as follows from the expression (2). Know the NM value from (2 ), the HB value from (1) is determined. In block 37, the measured HB value is compared with the given HBC.
    The value of the control action (the amount of electrolyte charged) is determined by the amount of deviation of the HB level in block 38. If the level exceeds a predetermined value, then the alarm unit 40 issues a message on the emergency discharge of electrolyte.
    Manual interventions in the process, associated with the need to correct the control parameters, are achieved through block 41. The control actions to activate the dispenser 20, the feeder 15 are generated through the dispenser control block 39.
    The use of the device allows maintaining the electrolyte level with high accuracy (± 1 cm), which favorably affects the performance of the electrolyzer and the grade of the metal.
    权利要求:
    Claims (6)
    [1]
    Invention Formula
    [2]
    one . A device for regulating the supply of an additional solid electrolyte to an electrolytic bath for producing aluminum by electrolysis of alumina is predominantly in an electrolyzer with a carbon cathode, carbon anode blocks mounted on the anode frame containing a date of controlling the height of the bath melt connected to the comparison unit, the second entrance of which is connected the unit for setting the height of the bath melt, and the output through the control unit is connected to the drive of the feeder-dispenser, so as to stabilize The loading cycle and the melt bath level, the device is equipped with tips located at the end of the rod connected to the piston of the power cylinder and with the displacement sensor mounted on the stationary structure of the electrolyzer, while the tip is electrically isolated from the structure of the electrolyzer, and the rod is designed to interact with a sliding contact connected via a coaxial resistor to the cathode of the electrolyzer, with a voltmeter connected in parallel with the low-resistance resistor. 2. The device according to claim 1, about tl and which means that the feeder consists of a bucket tank with inlet and outlet openings, the upper part of the tank is connected to the hopper, and the lower part is connected to the guide pipe, a rod connected at one end with the piston of the power cylinder, and at the other end of the rod, located in the bucket capacity, two dampers of elastic material are fixed.
    [3]
    3. The device according to claim 2, about tl and that the valve is made of braided steel wire.
    [4]
    4, Device pop, 2, characterized in that the flaps are made of felt.
    5971098
    [5]
    5. The device according to claim 2, characterized in that the flaps are made of felt reinforced with metal wire, 5
    [6]
    6. The device according to claim 2, about tl and -,. just so that the flaps are made of rubber.
    7, the apparatus according to claim 2, characterized in that the flaps are made of synthetic elastomer reinforced with steel wire.
    7/33
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    类似技术:
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    同族专利:
    公开号 | 公开日
    GR3002356T3|1992-12-30|
    US4857157A|1989-08-15|
    SA33B1|2000-10-14|
    NO881705D0|1988-04-20|
    NO171419C|1993-03-10|
    MY103264A|1993-05-29|
    NO171419B|1992-11-30|
    IS1432B6|1990-07-16|
    IS3333A7|1988-10-22|
    OA08833A|1989-03-31|
    FR2614320B1|1989-06-30|
    FR2614320A1|1988-10-28|
    CN88102179A|1988-11-23|
    HU207540B|1993-04-28|
    NO881705L|1988-10-24|
    AU603204B2|1990-11-08|
    CA1335436C|1995-05-02|
    EP0288397A1|1988-10-26|
    HUT49656A|1989-10-30|
    IN169735B|1991-12-14|
    CN1019514B|1992-12-16|
    EP0288397B1|1991-07-24|
    AU1478488A|1988-10-27|
    NZ224238A|1990-02-26|
    ES2024042B3|1992-02-16|
    BR8801909A|1988-11-22|
    DE3863827D1|1991-08-29|
    引用文献:
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    US3616432A|1969-01-27|1971-10-26|Haskett Barry F|Cathode level adjustment means|
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    CH587357A5|1973-08-09|1977-04-29|Alusuisse|
    CH592749A5|1974-01-30|1977-11-15|Alusuisse|
    US4045308A|1976-11-04|1977-08-30|Aluminum Company Of America|Bath level set point control in an electrolytic cell and method of operating same|
    EP0195143B1|1985-03-18|1988-10-26|Alcan International Limited|Controlling aluminium reduction cell operation|JPH06501742A|1990-10-05|1994-02-24|
    EP0604664A4|1992-06-30|1995-01-25|Tovarischestvo S Ogranichennoi|Method for obtaining aluminium and other metals.|
    RU2032773C1|1992-06-30|1995-04-10|Товарищество с ограниченной ответственностью "Межотраслевой центр проблем экологии и эффективности производства алюминия"|Method of aluminium production|
    FR2727985B1|1994-12-09|1997-01-24|Pechiney Aluminium|METHOD AND DEVICE FOR MEASURING THE TEMPERATURE AND LEVEL OF THE MELT ELECTROLYSIS BATH IN ALUMINUM PRODUCTION TANKS|
    US7122252B2|2002-05-16|2006-10-17|Cardinal Cg Company|High shading performance coatings|
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    DE102007059962B3|2007-12-11|2008-12-11|Robert Bosch Gmbh|Electrolytic aluminum production plant, includes cutting tool for breaking up crust around anode having base region forming electrode for accurate measurement of molten aluminum layer thickness|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    FR8705874A|FR2614320B1|1987-04-21|1987-04-21|METHOD AND DEVICE FOR CONTROLLING THE ADDITIONS OF SOLID ELECTROLYSIS IN ELECTROLYSIS TANKS FOR THE PRODUCTION OF ALUMINUM.|
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