• 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 the field of ferrous metallurgy, in particular to methods for controlling the loading of a shaft furnace. The purpose of the invention is to ensure the accuracy of the material consumption when loading. With the actual consumption of material less than the predetermined value, the damper is additionally opened and maintained in this position with the actual consumption greater than the specified value. 1 hp f-ly, 4 ill.
    公开号:SU1493112A3
    申请号:SU864027420
    申请日:1986-05-07
    公开日:1989-07-07
    发明作者:Бернар Жильбер；Бреден Эмиль；Лонарди Эмиль
    申请人:Поль Вюрт С.А. (Фирма)；
    IPC主号:
    专利说明:

    The invention relates to ferrous metallurgy, in particular to methods for controlling the loading of a shaft furnace.
    The purpose of the invention is to ensure the accuracy of the material consumption when loading.
    FIG. Figure 1 shows the curve of a decrease in the mass of the hopper without adjusting the position of the valve J in FIG. 2 is the same when correcting the position of the flap in two directions; in fig. 3 - the same, when correcting the position of the valve in only one direction according to the proposed method on (}) ig. 4 is a diagram of an apparatus for implementing the method.
    . The solid line in FIG. 1 shows a curve representing the actual mass of the bunker P, i.e. the measured mass, and the dash-dotted straight line represents the given mass Pp, which ensures a uniform yield of the loading material at a given time T. The gradient of the curves, i.e.
    DR
     . represents material consumption
    U t
    in the case of direct P, the gradient is constant.
    The course of each of the curves P and P j. represents the very beginning of the opening phase of the metering valve. As soon as the flap reaches a position corresponding to the prescribed QC flow, then the bunker mass should be reduced according to a linear law in order to guarantee a constant flow corresponding to the prescribed Q value. However; from the course of both curves it is clear that, starting at some point, the difference between the mass of the material j really located in the bunker and the mass of the material that must be there to achieve a constant flow rate Q becomes more and more and the bunker is empty only after some time after the moment T.
    The control for correcting the position of the flap to compensate for the divergence between the curves P and P causes the situation (FIG. 2) when
    g
    (L

    cm
    the actual flow rate fluctuates around a given value, since the flap always moves too far regardless of the direction in which it moves.
    If the flap position is corrected only in the direction of its opening, then linearization of curve P, r is achieved and it coincides with the curve of P. corresponding to the given flow rate (Fig. 3).
    If, by controlling the proposed method, too large a flap opening occurs, if the measured flow exceeds a predetermined value, then the flap is not touched, since the flow will soon inevitably fall without modifying the position of the flap (Fig. 1).
    Example. At the head of the furnace 1 there is a chute 2, controlled by a drive device 3 to rotate around the axis of the furnace and adjust the height angle, and the frame 4, which supports the hopper 5 through the weighing devices 6. The latter provide a constant indication of the mass of the bunker 5 and its contents. The outlet of the hopper 5 is controlled by the metering valve 7, which may consist of two valves with a symmetrical movement around the axis of the furnace. The metering valve 7 is driven by a hydraulic cylinder 8. The detector of 9 positions serves to determine the actual position of the valve 7.
    A device for implementing the proposed method contains one central hopper 5 (Fig. 4 However, the invention is applicable to other installations containing two or more silos.
    The hydraulic cylinder 8, which controls the position of the metering valve 7, is driven by a hydraulic valve 10 which is proportional to where the compressed oil flows from the hydraulic control unit 11. In the control loop, there is also a computer 12 designed to carry out settlement operations and store the necessary information. The information coming from the computer 12 is transmitted to the control unit 13, which acts on the hydraulic valve 10; regulate races
    five
    0
    five
    oil run, i.e. control speed of the hydraulic cylinder 8 and valve 7.
    The computer 12 constantly receives information P and S, representing respectively the actual mass of the bunker 5 and the actual position of the metering valve 7. There also receives information about the task of the loading program, namely the time T of the output of the contents of the bunker 5 as functions of the loading program and / or distribution of material. The computer 12 stores information needed to control, for example, various parameters related to the nature of the feed material, the position of the shutter 7 to guarantee a certain flow rate of a certain material, etc. All information stored in machine 12 is based on knowledge gained from previous downloads. It is on such an information base that computer 12 calculates and provides information on the task to control unit 13 for adjusting valve 7. For example, if computer 12 knows the time T required to exit the contents of the bunker 5, and the known mass of the bunker 5, as well as parameters related to the nature of the material, i.e. its granulometry, and, if necessary, other parameters affecting the rate of outflow of material from the bunker 5, the machine 12 finds the required flow rate Q and from it the position of the initial opening of the valve 7.
    On the basis of the information on the task coming from the computer 12, the control unit 13 sends a command to the hydraulic valve 10, activating the cylinder 8 until the valve 7 is in the set opening position. These actions are monitored by the detector 9, which provides information on the instantaneous position of the shutter 7 to the control unit 13, which stops moving to the opening of the shutter 7 as soon as the difference between the actual position S 5 and the setpoint S becomes approximately zero. Starting from that moment, i.e. since the moment when the flap 7 takes the set position
    five
    0
    five
    0
    Opening, the computer 12 performs at certain intervals, for example, three times per second, finding the evolution of the mass change of the bunker 5. Three cases are possible.
    If the actual flow rate is Q., i.e. a decrease in mass Pp per unit time, equal to or equal to a given value of Q s by a negligible value, the value of which is arbitrarily accepted in advance, then damper 7 is held in its original position
    If the actual flow rate Q exceeds the specified value Qc, i.e. the position of the shutter 7 S g is too large and the 5 Sc S g is negative, then no correction of the position of the shutter 7 is carried out, as is known (Fig. 1) that the flow Q is automatically reduced and without modifying the position of the valve 7, approaching the specified value Q. However, as a precautionary measure, for example in case of a programming error, it can be envisaged that if the US greatly exceeds the upper limit, then the valve 7 is automatically closed by an amount corresponding to to a certain limit.
    If the actual flow rate Q becomes less than the specified value Q, then the value of the previous charge S p at the position of the flap 7 is too small, and then proceeds to correct the position of the flap 7. For this, the Computing machine 12 calculates the position of the flap 7 corresponding to the specified flow rate Q and its Q value, and determines the 4S difference between the two positions.
    The control unit 13 supplies the command to the hydraulic valve 10 to open the valve 7 by an amount equal to L8. This correction is repeated every time a need arises, i.e. whenever the actual flow rate deviates from the target value by a certain amount. Computing machine. 12
    five.
    0
    Q
    five
    five
    0
    0
    remembers successively the order positions for the valve 7, and during subsequent loading under the same conditions, the need for correction either does not arise at all, or the correction becomes less and less frequent.
    The flow of hydraulic oil is regulated by a command from the control unit 13 as a function of the value of uS, i.e. the shutter 7 moves the faster, the more the D5, and vice versa, its movement becomes more and more slow as the AS decreases. Stopping the shutter 7 is better when the 4S reaches the lower set limit, so as to be sure that the shutter 7 has not passed the predetermined position, and not be in the position shown in Fig. 2.
    The application of the invention will make it possible to more accurately withstand the shaft furnace loading program.
    权利要求:
    Claims (2)
    [1]
    1. A method for controlling the loading of a shaft furnace, including measuring the mass of at least one bunker mounted on top of the furnace, determining the mass of material in the bunker, the degree of initial opening of the valve and the time of material unloading during this opening to the charging chute for various types of material and different loading conditions, the actual consumption for a certain time interval and its comparison with the specified one, characterized in that, in order to ensure the accuracy of the material consumption during loading, (the damper additionally opens When the actual consumption of the material is less than the specified value, they are maintained in this position with the actual consumption greater than the specified value.
    [2]
    2. Non.l method, characterized in that the opening speed of the valve is set to be proportional to the difference between the position of the valve, corresponding to a given flow rate, and the position, corresponding to the actual flow.
    1
    FIG. g
    g t.c
    j
    Wg
    Editor I. Derbak
    0i / e.
    Compiled by G. Shepelev
    Tehred A. Kravchuk Proofreader L. Bezkid
    QJufJ
    Г i, c
    / 2
    Sc
    I
    类似技术:
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    同族专利:
    公开号 | 公开日
    LU85892A1|1986-12-05|
    AU574574B2|1988-07-07|
    EP0204935B1|1989-03-22|
    DE3662533D1|1989-04-27|
    ES8703618A1|1987-03-01|
    JPS61266512A|1986-11-26|
    AU5687486A|1986-11-20|
    CN1006554B|1990-01-24|
    CA1269831A|1990-06-05|
    IN167117B|1990-09-01|
    JPH0776372B2|1995-08-16|
    KR930009386B1|1993-10-02|
    EP0204935A1|1986-12-17|
    KR860009133A|1986-12-20|
    ZA863206B|1987-02-25|
    CZ320186A3|1994-01-19|
    ES554736A0|1987-03-01|
    CN86103226A|1986-11-05|
    AT41679T|1989-04-15|
    BR8602270A|1987-01-21|
    IN165912B|1990-02-10|
    US4714396A|1987-12-22|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE1947200A1|1969-09-18|1971-04-01|Still Fa Carl|Device for evenly filling the coking coal into horizontal coking furnace chambers from filling containers of filling wagons|
    DE2216552C3|1972-04-06|1980-10-30|Bayer Ag, 5090 Leverkusen|Disubstituted N- [aminomethylidene] -thiol- -phosphoric acid esterimides, process for their preparation and their use as insecticides and acaricides|
    LU66430A1|1972-11-08|1973-02-05|
    LU77547A1|1977-06-16|1977-09-19|
    JPS5752404B2|1979-09-28|1982-11-08|
    JPS5678730A|1979-11-27|1981-06-27|Sumitomo Heavy Ind Ltd|Feeding device for coal in coal charging truck|
    JPS56136908A|1980-03-28|1981-10-26|Sumitomo Metal Ind Ltd|Charging method for bell-less type blast furnace|
    DE3212423A1|1982-04-02|1983-10-13|Krupp Polysius Ag, 4720 Beckum|METHOD FOR PNEUMATICALLY DISCHARGING GOODS FROM A STORAGE CONTAINER|
    JPS6043406B2|1983-02-10|1985-09-27|Ishikawajima Harima Heavy Ind|
    US4527714A|1983-02-18|1985-07-09|White River Technologies, Inc.|Pressure responsive hopper level detector system|
    JPS59229407A|1983-06-09|1984-12-22|Kawasaki Steel Corp|Method for controlling opening degree of flow regulating gate of bell-less blast furnace|
    JPS6043415A|1983-08-18|1985-03-08|Ishikawajima Harima Heavy Ind Co Ltd|Control device of apparatus for charging raw material to furnace top|
    JPS6046306A|1983-08-24|1985-03-13|Ishikawajima Harima Heavy Ind Co Ltd|Control method of raw materials charging unit at furnace-top|
    US4659274A|1984-11-13|1987-04-21|Accutrol Incorporated|Computer controlled load-out system|LU86820A1|1987-03-24|1988-11-17|Wurth Paul Sa|SUPPORT FRAMEWORK FOR A LOADING INSTALLATION OF A TANK OVEN|
    LU86822A1|1987-03-24|1988-11-17|Wurth Paul Sa|METHOD AND DEVICE FOR CORRECTING THE FALL TRAJECTORY IN A LOADING INSTALLATION OF A TANK OVEN|
    DE8903711U1|1989-01-25|1989-05-18|K-Tron International, Inc., Pitman, N.J., Us|
    CH678847A5|1989-06-02|1991-11-15|Maerz Ofenbau|
    US5103401A|1989-11-21|1992-04-07|Merrick Industries, Inc.|System for precisely controlling discharge rates of loss-in-weight feeder systems|
    US5458450A|1993-05-07|1995-10-17|Exxon Chemical Patents Inc.|Pressure-vacuum rated flexible connector for use in material handling systems|
    JPH07258650A|1994-03-23|1995-10-09|Kawasaki Steel Corp|Charging method of coal for coke making in coke oven and apparatus therefor|
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    CN101353116B|2008-09-05|2012-03-14|江苏省冶金设计院有限公司|Rotating material bed equipment and distributing mechanism thereof|
    CN101748227B|2008-12-19|2011-09-21|宝山钢铁股份有限公司|Weighing device and weighing method for blast furnace top weighing pot|
    LU91526B1|2009-02-11|2010-08-12|Wurth Paul Sa|Method and system for adjusting the flow rate of charge material in a charging process of a shaft furnace|
    LU91525B1|2009-02-11|2010-08-12|Wurth Paul Sa|Method and system for adjusting the flow rate of charge material in a charging process of a shaft furnace|
    CN103436648B|2013-08-30|2015-09-16|莱芜钢铁集团有限公司|The inflation method of chute stream aperture and device in blast furnace material distribution|
    CN109580983A|2018-12-17|2019-04-05|苏州宇量电池有限公司|A kind of sieving measurement of rate of flow method of pulp of lithium ion battery|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    LU85892A|LU85892A1|1985-05-10|1985-05-10|METHOD FOR CONTROLLING THE LOADING OF A TANK OVEN|
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