• 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:
    A method of pouring a molten metal from an intermediate vessel (3) into a plurality of continuous casting moulds (A, B and C) through respective discharge valves (4) and withdrawing all the castings from the moulds with a common withdrawing unit (12, 13) includes opening all the valves (4) to initiate the pouring process, and monitoring the filling level (20) within each mould in a measuring zone (9). That mould whose filling level first reaches a first threshold level (21) has its associated valve (4) throttled and the withdrawing unit is switched on either when all the filling levels are substantially the same or when the first of the filling levels reaches a second threshold level (22) above the first threshold level, whichever occurs first. Each discharge valve is adjusted when the filling level in the associated mould reaches a desired level (8) above the second threshold level so as to maintain the filling level substantially at the desired level. Any mould in which the filling level has not reached the first threshold level (21) at the time the withdrawing unit is switched on has its associated valve (4) closed. <IMAGE>
    公开号:SU1367846A3
    申请号:SU853942850
    申请日:1985-08-22
    公开日:1988-01-15
    发明作者:Тиннес Бернхард；Кройцберг Хайнц
    申请人:Метакон Аг (Фирма)；
    IPC主号:
    专利说明:

    WITH
    oo
    ABOUT)

    00
    four; Od
     cm
    that at the beginning of the casting, the metal from the intermediate tank 3 is fed to the crystallizers A, B, C with full flow. The sensors 10 and the receivers 11 measure the level of the metal in each of the crystallizers. At the beginning of casting, when the metal level in any of the crystallizers reaches the first technological value (plane 21), the flow of metal from the intermediate tank 3 into the crystallizer is reduced by means of a corresponding gate valve 4 controlled by a controlled computer 17. When the metal level reaches In any of the molds, the planes 22 begin to draw all the ingots 18 by means of a TZ drive. If the level of the metal in any of the molds is at the bottom of the plane 21 at the time of the beginning of the ingots drawing, the process of casting on this stream is stopped. 2 s, p. F-ly 5 Il.
    one
    The invention relates to metallurgy and is intended for pouring molten metal, especially steel melt, from an intermediate tank into several molds for casting ingots using adjustable drain gates.
    The purpose of the invention is to increase the yield of a suitable metal.
    FIG. 1 shows a schematic of a device for pouring several ingots at the beginning of a pour; in fig. 2-5 - various processes of program execution that are possible at the time of the start of casting. /.
    The device contains a pouring ladle 1J from which, through a regulated drain valve 2, the steel melt is supplied to an intermediate tank 3 which has three drain valves in the form of slide gates 4 regulating the flow of the melt through filling nozzles 5 into crystallizers A, li and C for ingot casting . For this, each slide valve 4 is mechanically connected to the actuating mechanism 6, the corresponding position of which is fixed by the position sensor 7 during operation. The filling nozzles 5, with their free ends, enter the crystallizers A, B and C, in which the predetermined filling level 8 set for normal operation is approximately 85% of the measuring zone 9. The sensors 10 and receivers 11 are designed to measure the filling of the crystallizers with metal.
    five
    0
    five
    0
    five
    A second cooling device (not shown) is located behind the crystallizers A, B, and C, as well as a common exhaust ingot for the ingots, which has driving rollers 12, a drive 13, a drive regulator 14, and a speed sensor 15 for drawing. The latter transmits information to the drive controller 14 and to the processor 16, which receives and processes, in addition, the measurement values of the sensor 7 of the position, which controls the degree of opening of the slide gates 4, and the receivers 11 for measuring the filling level. The received data goes to the control computer 17, combined with the processor 16, which issues the appropriate control commands to the actuators 6 of the slide gates 4 and to the device actuator 14. The ingots 18 formed in crystallizers A, B, and C are stretched. with a common exhaust unit. The gate valves 4 are kept in throttling positions during normal operation during casting.
    Prior to the start of pouring, cold seeds of ingots 18 were introduced into crystallizers A, B and C and the drive 13 of the exhaust device was turned off. Filling begins by opening the slide gates 4, which, depending on the size of the ingots to be cast, are fully or only partially opened, so that in filling stations A, B and C above the seed heads 19, actual filling levels 20 are formed.
    .3. 1 In the process of pouring, various inflow values per unit time from the filling nozzles 5 are possible, because constrictions occur in the drain and flow channels of the intermediate tank 3 and the slide gates 4, for example, due to the formation of wall accretions
    due to freezing, melt on the still insufficiently heated places of the channel walls. Viscosity also increases due to cooling of the liquid stly with elongated passage ways in the intermediate tank.
    The actual filling levels 20 are equalized by throttling the slide gate 4 of that mold A, B and C, at which the actual filling level has reached the first technology-specified value - plane 21, which lies at a height corresponding mainly to 10% of the measuring zone 9. The alignment of the levels 20 to the actual degree is controlled in the same way. The filling of all crystallizers A, B and Ci. After this, the control computer 17 turns on the drive 13 of the exhaust unit. The predetermined fill level 8 is then maintained as usual for control. If there is no leveling off, or it only exists between two of the crystallizers A ,. B and C, then a control command is issued to turn on the drive 13 of the suction unit at the latest from a signal received from another given value — a plane 22 provided inside the zone — 9 measurements below the specified filling level 8 using the actual filling level 20 there first. At the same time, commands are received for closing the slide gates 4 of those crystallizers A, B and C, in which the actual filling levels 20 are still below the slope 21.
    For those shown in FIG. 1, the actual fill levels 20 correspond to the graph in FIG. 2. According to this, the actual level 20 of pouring the crystallizer C after the simultaneous full opening of all slide gates 4 at the start of pouring at time C, first crossed the plane 21 and the slide gate 4 relating to the mold C was cast



     one

    n throttling position.
    five
    ten
    FROM THIS
    As of today, the filling levels 20 in the crystallizers A and B grow faster than the filling level in the crystallizer C to the instantaneous position (Fig. 1), which was reached after the pouring time t.
    FIG. 3-5 the fill time t is traced until a predetermined filling level 8 is reached. From the graph in FIG. 3, it follows that the plane 21 is in
    0
    Q
    five
    0
    At the beginning, the actual filling level of the crystallizer 5A at time A, was intersected, then the actual filling level of crystallizer B at time B, and finally, the actual filling level of crystallizer C at time C, and the slide gates 4 were throttled in the corresponding sequence, After throttling the closures 4 for the crystallizers A and B for these two valid filling levels, the same level is obtained at point 23 before throttling the slide gate 4 of the crystallizer C The actual filling level 20 of which coincides with the actual filling levels 20 for the crystallizer A and B at point 24, in which the drive unit 13 of the extracting unit is activated, is expedient at a speed equal to 70% of the normal speed. As soon as the exhaust aggregate drive started working, a curve of identical actual filling levels arises, which distinctly less steeply rises, which means that the actual levels of the application rise more slowly until the end of filling time t and the adjustment to the specified filling level 8 has occurred,
    The actual fill level 20 (FIG. 4) of mold B has no common level with actual fill levels 20 of molds A and C, although all actual fill levels over time C, A and B crossed the plane 21 for throttling and at 25 there was a coincidence of the actual level of filling the crystallizers C and A, 20. Then, in the course of a further rise, both levels of crystallizer C and A, which were the same for the actual level of filling, reached the second plane 22, where
    five
    five
    the drive 13 of the exhaust device is turned on, and, finally, they have switched to the predetermined filling level 8, to which the actual filling level 20 of the crystallizer B comes after the fracture of the level rise at point 26 after the pouring time t. A similar process takes on
    and the start of filling according to the chart in FIG. 5, 10 of the molds of the first order. The actual levels 20 of pouring of the molds B and A after throttling the slide gates on the plane 21 during times B and A from point 27 jointly rise to a flat 22 outputs the start signal of the drive and then, by the time t, rises to the specified fill level 8. When the drive unit 13 of the exhaust unit is turned on with the help of the actual filling levels 20 of the crystallizers B and A, the actual filling level 20 of the crystallizer C did not reach
    This technology value decreases the flow of metal from the intermediate tank to this mold. When the metal level in any crystallizer and the second one reaches the specified technology value, the ingots begin to be drawn at a given speed, and if, at the time of the ingot pull, the metal level in any from the crystallizers below the first-set value according to the technology, stop the casting process on this stream.
    2. Device automatic level Bbmie critical plane
    21 throttling signals, and even 25 by installing a continuous, spread out below the beginning of the 0% zone of the 9th metal change, containing sensors
    The metal level in the molds and the ingot speed regulator, coupled with an exhaust drive, is characterized in that, in order to increase the yield of a suitable metal, it is equipped with an ingot speed extraction sensor, sensors of the position of the slide gate es of the intermediate tank, a computational unit, where the ingot pulling speed sensor is connected to regurine, which caused the automatic closure of the slide gate 4 for the crystallizer C.
    With such a control, installations for continuous casting of ingots with one exhaust aggregate for several ingots can reliably start up at a predetermined filling level.
    权利要求:
    Claims (2)
    [1]
    1. Method for automatic control of a continuous casting plant, mainly from an intermediate tank with adjustable drain valves, to a multi-mold mold with a common ingot pulling drive, including feeding metal from the intermediate tank to the molds at the beginning of the full-flow casting, measuring the metal with an ingot pulling rate and one of the inputs of the computing unit, the other inputs of which are connected to the metal level sensors in the molds and the position sensors Bernier gates, the first output of the computing unit is connected to the torus re45 hum bars stretching speed, the other outputs are connected to the computing unit drives slide gate.
    in all molds, the change in the rate of ingot extrusion and the change in metal flow from the interval of the exact capacity to the molds, characterized in that, in order to increase the yield of the suitable metal, at the beginning of the casting process, when the level of the metal in one of the crystallizers reaches the first
    This technology value reduces the flow of metal from the intermediate tank to this mold. When the metal level in any of the molds reaches the second technological value, the ingots begin to be pulled out at a given speed, moreover, if at the time of the ingots start, the metal level in any of the molds below the first given value according to the technology, stop the process of casting on the given stream.
    [2]
    2. The device for automatic extraction of ingots and one of the inputs of the computing unit, the other inputs of which are connected to metal level sensors in the molds and sensors of the position of the slide gates, the first output of the computing unit is connected to the ingot speed regulator, the remaining outputs of the computing unit connected to the slide gate actuators.
    类似技术:
    公开号 | 公开日 | 专利标题
    SU1367846A3|1988-01-15|Method and device for automatic control of metal continuous casting plant
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    US4597048A|1986-06-24|Digital flow regulation of liquid-level control for a continuous casting mold
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    US5048594A|1991-09-17|Process for controlling change of throttling position in a sliding closure unit
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    JP2874567B2|1999-03-24|Level control method for start-up of continuous casting with multiple molds
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    JP2000015402A|2000-01-18|Method for controlling flow rate of molten metal in casting machine, and controller therefor
    JPH05285604A|1993-11-02|Method for controlling pouring quantity of molten metal in twin roll caster
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    JPH05237618A|1993-09-17|Device for controlling molten metal surface level in continuous caster
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    同族专利:
    公开号 | 公开日
    CS600085A3|1992-02-19|
    DE3432611C2|1986-09-04|
    MX168192B|1993-05-10|
    SE8504088D0|1985-09-03|
    IT1185654B|1987-11-12|
    FR2569588B1|1988-09-23|
    CA1239523A|1988-07-26|
    SE8504088L|1986-03-06|
    ES8700989A1|1986-11-16|
    PL254958A1|1986-07-01|
    AT391643B|1990-11-12|
    JPH0716774B2|1995-03-01|
    PL147451B1|1989-06-30|
    IN164762B|1989-05-27|
    GB2163983B|1988-01-13|
    DE3432611A1|1986-03-13|
    ES546694A0|1986-11-16|
    ZA856821B|1986-04-30|
    ATA252385A|1990-05-15|
    GB8521947D0|1985-10-09|
    BE903179A|1985-12-31|
    CH668370A5|1988-12-30|
    GB2163983A|1986-03-12|
    SE461258B|1990-01-29|
    JPS6167551A|1986-04-07|
    FR2569588A1|1986-03-07|
    IT8521682D0|1985-07-23|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
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    JPS6240108B2|1977-11-22|1987-08-26|Ishikawajima Harima Heavy Ind|
    CH639575A5|1979-04-27|1983-11-30|Concast Ag|METHOD AND DEVICE FOR CONTINUOUSLY MOLDING SEVERAL STRINGS.|
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    JPS61273246A|1985-05-28|1986-12-03|Sumitomo Metal Ind Ltd|Control device for molten metal level in casting mold|
    DE3538222C2|1985-10-26|1989-05-11|Metacon Ag, Zuerich, Ch|
    JPH0411293B2|1986-02-07|1992-02-28|
    JPS62183952A|1986-02-07|1987-08-12|Sumitomo Metal Ind Ltd|Control method for surface level of molten steel in mold|
    JP2914817B2|1992-04-28|1999-07-05|新日本製鐵株式会社|Missing casting method in continuous casting|
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    CN111922311A|2020-07-24|2020-11-13|攀钢集团攀枝花钢铁研究院有限公司|Tundish liquid level control method in continuous casting production process|
    CN112059135A|2020-08-20|2020-12-11|张家港宏昌钢板有限公司|Crystallizer molten steel level correction device and application method thereof|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE3432611A|DE3432611C2|1984-09-05|1984-09-05|Procedure for starting up a continuous caster with several strands|
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