JP2005194579A - Molten iron tapping hole operating unit in blast furnace and its driving control method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a molten iron tapping hole operating unit used at opening or closing the tapping hole in a blast furnace and its driving control method with which spattering of the molten iron and dusting can be restrained. <P>SOLUTION: In the molten iron tapping hole operating unit provided with a mud gun 1, a trough cover before tapping hole 3, a hole opening device 2 and a tapping hole operating unit control and calculating unit, when the tapping hole is closed by driving the mud gun, the present position of the mud gun at the shifting time from the upper place of the tapping trough of the trough cover before tapping hole to a retreat position is detected to obtain the shifting speed and further, a time for coming out of a turning locus of the mud gun is predicted, and based on this prediction, the mud gun automatically starts the turning at the timing so as not to collide with the trough cover before tapping hole to close the tapping hole. Further, when the tapping hole is opened by driving the hole opening device, after completing the hole opening, the shifting speed is obtained from the present position at the turning time from the hole opening position of the hole opening device to the retreat position and a time for coming out of the shifting range of the trough cover before tapping hole is predicted, and based on this prediction, the trough cover before tapping hole automatically starts the shifting at the timing so as not to collide with the hole opening device to cover a molten iron tapping trough. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a blast furnace outlet device used when opening or closing an outlet of a blast furnace and an operation control method thereof.

  A mud gun, a hole front cover and a hole opening device (hereinafter also referred to as “equipment” for convenience) provided in the blast furnace outlet device are all provided movably in front of the outlet. By properly moving the device between the respective retracted positions and a predetermined position before the tap hole, the tap hole is opened and closed.

  That is, when opening the tap opening, first, the mud gun is moved to the mud gun retracting position, then the opening device is moved to the opening position before the tap opening, and then the tap opening is opened. The opening device is moved to the retracted position, and then the hole front cover is moved to the front hole cover mounting position of the outlet in order to prevent the molten iron from scattering (spraying) from the outlet. .

  On the other hand, when closing the tap opening, first move the hole front cover to the retracted position, then move the mud gun to the mud filling position before the tap opening, and put a refractory (mud) on the tap opening. The filling operation is performed.

  Each device of the hole opening device, mud gun, and front hole cover is provided with a means for detecting the position of each device. When the devices are moved, the operator confirms the position of each device by the means. Then, movement toward a predetermined position in front of the tap opening, positioning, or evacuation from before the tap opening is performed.

  For example, Patent Document 1 discloses a position detection means for detecting the position of a sprue opening machine and a position signal of the spout opening machine detected by the detection means. There is described a sprue opening device having a control means for moving, positioning and retracting with respect to the spout. Further, Patent Document 2 discloses an opening machine body setting sequencer for sequentially performing various operations for setting the opening machine body before the exit and an opening metal bar remote control sequencer. A remote operation device for a mouth opening device is disclosed.

  Further, Patent Document 3 includes a mud gun, a hole front cover, a hole opening device, and a spout device control device that controls the movement of each device, and the spout device control device includes: A circuit is incorporated that detects the current position of each device and based on that, stops the movement of other devices at the start of the operation of each device, that is, does not operate at each retreat position. A blast furnace outlet device and its operation control method are disclosed.

  However, when operating the spout opening device or the remote operation device described in Patent Document 1 or 2, it is necessary for the operator to check the position of the mud gun or the hole front cover every time the operation is performed. If the operator misoperates, there is a risk of collision between these devices.

  According to the blast furnace outlet device and its operation control method described in Patent Document 3, this problem can be solved and the mutual collision of the hole front cover, the mud gun, and the opening device can be reliably prevented. In addition, it is possible to continuously operate the forehead cover moving device, mud gun, and opening device continuously, and the opening and closing operations can be performed remotely from the operation room, etc., in addition to saving labor. There is also an advantage that safety can be improved.

  However, in order to avoid a collision between these devices, each device is set to start each operation after confirming that the other devices have been retracted and are in the retracted position. Therefore, time loss occurs during continuous operation. In addition, even when using the opening device described in Patent Document 1 or 2, when operating continuously with the movement device or mud gun of the hole fore cover, the operator confirms the completion of retraction. Since driving is started, time loss is unavoidable.

  In particular, when the hole is closed, the operation to move the front hole cover from the front hole cover mounting position to the retracted position and the subsequent operation to move the mud gun to the mud filling position before the outlet are performed. In this case, if the swivel movement of the mud gun is started after the fore hole cover returns to the retracted position, the time between the start of the movement of the fore hole cover to the retracted position and the completion of the movement of the mud gun to the mud filling position is required. Since the loss is large and the slag is not covered during that time, the working environment is deteriorated due to the scattering and dust generation of the hot metal at the end of the spill.

  Also, after opening the opening device by moving the opening device to the opening position before the opening, the opening device is moved to the retracted position, and the next hole opening cover is output. Even when the operation of moving to the heel mounting position and covering the output is performed continuously, if the hole opening device returns to the retracted position, the movement of the hole front heel cover starts. It is not possible to suppress hot metal scattering and dust generation immediately after opening the hole until it moves to the mounting position.

Japanese Patent Publication No. 7-35523

JP-A-8-333610 JP 2002-371308 A

  As described above, in the conventional technique, when the opening device, the mud gun, and the hole forehead cover moving device are continuously operated, time loss is unavoidable. When continuously moving to the retreat position and before the mud gun outlet (mud filling position), or when moving the hole opening device to the retraction position and opening the hole front cover When the movement to the ridge (mounting position) is carried out continuously, the molten iron scatters and generates dust.

  The present invention has been made in order to solve such a problem, and is in a state in which the front hole cover is not mounted at the cover mounting position on the top of the hole immediately before the closing or immediately after the opening, and the output is performed. An object of the present invention is to provide a blast furnace outlet device and its operation control method capable of shortening time as much as possible and suppressing spattering and dust generation of hot metal.

  As described above, each device of the opening device, the mud gun, and the front hole cover is provided so as to be movable between a predetermined position in front of the outlet and the retracted position, for example, by turning, and the movement of each device. When two or more devices exist simultaneously in a region where two or more tracks overlap, a collision occurs between the devices.

  Therefore, when the devices that existed in such an overlapping area move out of this area and at the same time another device enters into this area, each device is moved continuously. Time loss is minimized and continuous operation can be performed in the shortest time.

  The present invention has been made based on such a concept, and the gist of the present invention is an operation control method for a blast furnace outlet device described in (1) and (2) below, and a blast furnace described in (3) below. It is in the spout device.

  (1) Movement between the mud filling position and the mud gun retracting position is possible, and the movement between the mud gun filling the blast furnace outlet with mud and the front hole cover mounting position and the front hole cover retracting position is possible. And a front hole cover that covers the spear, a hole opening device that can move between a hole position and a hole retreating position, and that opens the spout opening, the mud gun, and the hole An operation control method for a blast furnace outlet device including a front cover and an outlet device control arithmetic unit for controlling the movement of each of the opening devices, wherein the hole Detects the current position when the cover moves from the front hole cover mounting position to the retracted position, continuously outputs the detected current position to the outlet device control arithmetic unit, and outputs each current position Calculate the moving speed of the hole front cover based on the change of , Using this moving speed, predict the time when the hole forehead cover goes out of the swivel trajectory of the mud gun, and further calculate the timing at which the mud gun does not collide with the hole forehead cover based on the prediction and the set swirl speed of the mud gun, The operation control method of the blast furnace outlet device in which the mud gun automatically starts turning at that timing and moves to the mud filling position, and the outlet is closed at the mud filling position.

  (2) Movement between the mud filling position and the mud gun retracting position is possible, and the movement between the mud gun for filling the blast furnace outlet with mud and the front hole cover mounting position and the front hole cover retracting position is possible. And a front hole cover that covers the spear, a hole opening device that can move between a hole position and a hole retreating position, and that opens the spout opening, the mud gun, and the hole An operation control method for a blast furnace outlet device comprising a front cover and an outlet device control arithmetic unit for controlling the movement of each of the opening devices, and after the opening is completed during the opening operation , Detecting the current position when the opening device revolves from the opening position to the retracted position, and continuously outputs the detected current position to the spout device control arithmetic device, and outputs each current Based on the change in position, calculate the revolving speed of the opening device, Is used to predict the time for the hole opening device to move out of the range of movement of the hole fore cover, and based on the prediction and the set movement speed of the hole fore cover, the hole fore cover is A blast furnace outlet device that calculates the timing at which it does not collide, automatically starts moving the hole front cover at that timing, moves to the hole front cover installation position, and mounts the hole front cover on the output Operation control method.

  (3) Movement between the mud filling position and the mud gun retracting position is possible, and the movement between the mud gun for filling the blast furnace outlet with mud and the front hole cover mounting position and the front hole cover retracting position is possible. And a front hole cover that covers the spear, a hole opening device that can move between a hole position and a hole retreating position, and that opens the spout opening, the mud gun, and the hole A spout opening device control arithmetic device that controls the movement of the front spear cover and the opening device, and the front spout device control arithmetic device includes a front hole cover when moving from the mounting position to the retracted position. Using the moving speed calculated based on the change in the current position of the cover, the time that the hole forehead cover goes out of the swivel trajectory of the mud gun is predicted, and the mud gun calculated based on that prediction and the set swirl speed of the mud gun is the hole forehead cover. At the timing of not colliding with A circuit in which the mud gun automatically starts turning, and / or a hole opening device using a turning retreat speed calculated based on a change in the current position of the hole opening device when revolving from the opening position to the retracted position. The time to go out of the movement range of the front hole cover is predicted, and at the timing when the front hole cover calculated based on the prediction and the set movement speed of the front hole cover does not collide with the opening device, the front hole cover A blast furnace exit device characterized in that a circuit for automatically starting movement is incorporated.

  According to the blast furnace outlet device and the operation control method thereof of the present invention, while reliably preventing the mud gun, the front hole cover and the opening device from colliding with each other, the front hole cover, the mud gun, and the opening device, It becomes possible to carry out simultaneous operation of the front hole cover. Specifically, during the opening operation of the spout, the mud gun is immediately moved to the mud filling position after the front hole cover starts moving to the retreat position, and the opening is completed during the opening operation. After the opening device starts moving to the retracted position, the hole front saddle cover can be quickly moved to the output mounting position. As a result, the state in which the punching is performed without the front hole cover being mounted on the paddle can be shortened, and the scattering and dust generation of the hot metal can be minimized.

  Embodiments of a blast furnace outlet device and an operation control method thereof according to the present invention will be described below with reference to the drawings.

  FIG. 1 is an explanatory view schematically showing a configuration example of a main part of a blast furnace outlet device of the present invention. As shown in FIG. 1, this spout opening device includes a mud gun 1, a hole front spear cover 3, a hole opening device 2, and a spout opening device control arithmetic device 7 (see FIG. 2).

  The mud gun 1 is supported by a pivotable support arm 1a and swivels from a retracted position (position where the mud gun 1 is present) to a mud filling position (position where the mud gun 1 'is present) along the mud gun swirling locus 1 ″ indicated by a broken line. The mud is filled in the outlet 5 of the blast furnace body 4 to close the outlet 5. When the closing is completed, the mud gun 1 'located at the mud filling position returns to the original position along the mud gun turning locus 1 ". Return to the retracted position.

  The front hole cover 3 is attached to a front hole cover moving device (not shown), and follows a front hole cover movement locus 3 ″ indicated by a broken line from the retracted position (position where the front hole cover 3 is located). To the front hole cover mounting position (the position where the front hole cover 3 'is located) and mounted on the tapping hole to suppress the scattering and dust generation of the hot metal. Retreat to the original retreat position along the locus 3 ″.

  The opening device 2 pivots from the retracted position (the position where the opening device 2 is located) to the opening position (the position where the opening device 2 'is located) along the opening device turning trajectory 2 ″ indicated by the broken line. Open the shed 5. After the opening, the opening device 2 'revolves along the opening device turning locus 2 "and returns to the original retracted position.

  A region surrounded by a broken line (thick line) in front of the tap opening in FIG. 1 is an operating range overlapping region 6 of the tap opening device in which movement paths of the hole opening device, the mud gun, and the hole punching cover overlap.

  Although not shown, the mud gun 1, the hole punch cover 3 and the hole opening device 2 are each provided with a position detector (position detection sensor) for detecting its own position. As these position detectors, for example, known position detectors such as a pulse generator, a limit switch, and a liquid amount integrating type detector can be used. Further, the mud gun 1, the fore hole cover 3 and the opening device 2 are each provided with a hydraulic drive device for turning and moving. In addition, the movement method between the retracted position of each device and a predetermined position before the spout is not limited to the swivel (mud gun, opening device) or the linear movement (hole front cover) illustrated in FIG. Other methods may be used.

  The spout opening device control arithmetic unit 7 controls the movements of the mud gun, the hole front cover and the hole opening device. FIG. 2 is a control system diagram showing the operation control method of the blast furnace outlet device of the present invention. As shown in FIG. 2, the outlet device control arithmetic unit 7 is a mud gun that controls the operation of the mud gun. A control device 8, a front hole cover moving control device 9 that controls the operation of the front hole cover moving device to which the front hole cover is attached, and an opening machine control device 10 that controls the operation of the opening device. And a movement position prediction calculation device 11 that inputs position signals detected by the position detection sensors 12b, 13c, and 14b of the mud gun, the hole front cover, and the opening device and predicts the movement positions of these devices. Then, the mud gun, the hole front cover and the hole opening control signal are output to the mud gun control device 8, the hole front cover movement control device 9 and the hole opening machine control device 10 to output the mud gun, hole front cover Integrally controls the operation of the bar and the opening device.

  More specifically, the outlet port device control arithmetic unit 7 incorporates one or both of the following two circuits.

  One is a moving position prediction calculation device based on a change in the current position of the hole front eaves cover 3 ′ at the mounting position when moving to the retracted position (the position at that time which changes every moment). 11, the movement speed is calculated and the movement position is predicted using the movement speed, and based on the movement position control device 7, the operation of the mud gun, the hole front cover and the hole opening device is performed. The time for the front hole cover to go out of the swivel trajectory 2 ″ of the mud gun is predicted by the control unit of the “outer opening device control arithmetic unit” that controls the overall operation of the mud gun. This is a circuit that calculates the timing at which the mud gun does not collide with the hole front cover based on the speed, and at that timing, the mud gun automatically starts turning from the retracted position to the mud filling position.

  The other is that the moving position prediction calculation unit 11 calculates the turning and retreating speed based on the change in the current position of the opening device when the opening device 2 'in the opening position revolves and retreats to the retracted position. And the moving position is predicted using the speed, and based on the predicted position, the opening device is operated in front of the hole by the taping device control calculation device 7 (also indicating the calculation unit of the taping device control calculation device). Based on the prediction and the preset moving speed of the front hole cover, the timing at which the front hole cover does not collide with the opening device is calculated. This is a circuit for automatically starting movement of the front hole cover from the retracted position to the mounting position at the timing.

  The former is a circuit that operates during the taphole opening operation, and the latter is a circuit that operates during the taphole opening operation. Either one of these two circuits may be incorporated, but if both are incorporated, it can be used for both the port opening closing operation and the port opening opening operation, which is desirable. .

  The operation control method of the present invention is an operation control method for the blast furnace outlet device thus configured. Hereinafter, a description will be given with reference to FIGS. 1 and 2.

  The operation control method described in the above (1) is an operation control method for the blast furnace outlet device when the outlet 5 is closed using the mud gun 1.

  First, the position detection sensor 13c (see FIG. 2) detects the current position when the front hole cover 3 'at the cover mounting position on the cover moves from that position to the retracted position.

  The detected current position signal that changes from moment to moment is continuously output to the outlet device control arithmetic unit 7. At that time, a signal from the limit switch 13b is also output for detecting the separation of the front hole cover from the operating range overlap region 6 of the tap opening device. Based on each of the output current position changes (that is, changing from moment to moment), the movement position prediction calculation device 11 obtains the movement speed of the hole front cover by calculation, and using this movement speed, The movement position of the front cover is predicted, and the front hole cover comes out of the swiveling trajectory of the mud gun in the outlet port device control arithmetic unit 7 (refers to the arithmetic unit of the “outer port device control arithmetic unit”). Time prediction is made. Based on this prediction and the swivel speed set in advance for the mud gun, a calculation is made of the timing at which the mud gun does not collide with the front hole cover even if the mud gun starts to swivel. That is, the timing at which the mud gun starts turning movement so that the mud gun enters the overlapping area 6 at the same time as the detachment of the front hole cover from the operating range overlapping area 6 of the tap opening device is calculated. Is required.

  The spout opening device control arithmetic unit 7 outputs an operation command signal at the timing obtained by the above calculation to the mud gun control unit 8, and the signal is transmitted from the mud gun control unit 8 to the hydraulic driving unit 12a of the mud gun. Automatically starts turning to move to the mud filling position and closes the spout at the mud filling position.

  The operation control method described in the above (2) is an operation control method of the blast furnace outlet device after the opening of the outlet 5 is completed using the opening device 2.

  In this control method, first, the position detection sensor 14b (see FIG. 2) detects the current position when the opening device 2 'at the opening position revolves from the position to the retracted position.

  The detected current position signal that changes from moment to moment is continuously output to the outlet device control arithmetic unit 7. Based on the output changes in the current position, the moving speed of the hole opening device is obtained by calculation, and using this moving speed, the moving position of the hole opening device is predicted as described above (so far). Is performed by the movement position prediction calculation device 11), and further, the tap hole device control calculation device 7 (refers to the calculation unit of the “lock port device control calculation device”). A time out of range is predicted. Based on this prediction and the pre-set movement speed of the front hole cover, the timing at which the front hole cover does not collide with the opening device even if it starts to move (that is, the operating range of the opening device) Immediately after leaving the overlapping area 6, the timing at which the hole fore cover starts moving so that the hole fore cover enters the overlapping area 6 is calculated.

  The spout device control calculation device 7 outputs an operation command signal at the timing obtained by the above calculation to the hole front rod cover movement control device 9, and the hole front rod cover movement control device 9 outputs the hydraulic pressure of the hole front rod cover. The signal is transmitted to the driving device 13a, the hole front saddle cover automatically starts to move to the hole front saddle cover mounting position, and the hole front saddle cover is mounted on the output.

  According to the blast furnace outlet device and its operation control method described above, it is possible to reliably prevent the mud gun, the hole front cover and the opening device from colliding with each other. It is possible to perform simultaneous operation of the hole device and the front hole cover.

  Using the blast furnace outlet device having the control system shown in FIG. 2, the operation control method of the present invention is applied when the outlet opening is closed and when the outlet opening is opened. The time required to move from the start of movement to the retraction position to the mud filling position of the mud gun (this is hereinafter referred to as “operation when the spout opening is closed”), dust generation time, and retraction of the opening device at the time of opening The time required to move from the start of movement to the position to the mounting position on the opening of the hole front cover (hereinafter referred to as “operation when opening the opening”) and the dust generation time were investigated. For comparison, the same survey was conducted for the conventional operation method. Note that the “dust generation time” means that during the brewing process, the brewing process is not covered (that is, the front hole cover is not mounted on the brewing process). The time during which scattering and dust generation occur.

  Hereinafter, description will be made with reference to the drawings (FIGS. 1 and 2 and FIGS. 3 to 8 described below). In addition, the operation time t1 to t16 of each tap door device shown in FIG. 3 to FIG. 8 is an actual measurement result, and the actual measurement value is rounded by rounding up or down in units of 5 seconds.

1. FIG. 3 is a flowchart of the operation of the front hole cover and the mud gun when the tap hole is closed by the conventional method (single operation) (this is referred to as “conventional method 1”). Note that a series of operations performed by this method are performed at the retracted position of the hole front saddle cover by the spout device control arithmetic device 7 (using the mud gun control device 8 and the scissor cover control device 9) shown in FIG. After confirming the stop, automatic operation control was performed based on the program that the mud gun starts turning to the filling position.

  In this conventional method 1, when the closing operation of the spout opening is started, the sputum cover 3 'set at the front spear cover mounting position is lifted and moved horizontally. Next, the spout opening device control arithmetic unit 7 determines whether or not the hole front saddle cover is in the retracted position based on a signal from the hole front saddle cover position detection sensor 13c. If it is in the retracted position, the heel cover is suspended and stopped, and if it is not in the retracted position, the heel cover is again moved horizontally to the retracted position, suspended and stopped. In the trial operation, the operation time t1 required for this series of operations was 60 seconds.

  After confirming that the front hole cover is stopped at the retracted position, the mud gun 1 at the retracted position starts turning, moves to the mud filling position, and moves the nozzle attached to the tip of the mud gun to the outlet 5. Crimped and filled with mud to complete the spout closing movement. The operation time t2 required for this was 20 seconds in the test run.

  In this conventional method 1, the total operation time (t1 + t2) was 80 seconds, and the dust generation time was also 80 seconds.

  FIG. 4 is an operation flowchart of the front hole cover and the mud gun when the tap hole is closed by the conventional method (interlocking operation) (this is referred to as “conventional method 2”), and an operation method aimed at shortening the dust generation time. It is. The series of operations performed by this method is the same as in the case of the conventional method 1, with the spout device control arithmetic device 7 (using the mud gun control device 8 and the heel cover control device 9) shown in FIG. After confirming that the fore hole cover has been detached from the overlapping area 6 using the limit switch 13b for confirming separation from the operating range overlapping area 6 of the tap opening device attached to the cover moving apparatus, the mud gun Was controlled automatically based on a program to start turning.

  In this conventional method 2, when the closing operation of the spout opening is started, the sputum cover 3 'set at the front spear cover mounting position is lifted and moved horizontally. Next, the spout opening device control arithmetic unit 7 determines whether or not the front hole cover has left the operating range overlap region 6 of the spout device based on the signal from the limit switch 13b for confirming the overlap region leaving. Determine. If it is out of the overlapping area 6, the bag cover is suspended in a suspended state, and if it is in the overlapping area 6, the bag cover is moved horizontally again to be detached from the overlapping area 6 and temporarily stopped. . In the trial operation, the operation time t3 required for this series of operations was 30 seconds.

  Subsequently, the mud gun in the retracted position starts turning movement. Based on the signal from the position detection sensor 12b of the mud gun, the spout opening device control arithmetic unit 7 determines whether or not it is in the mud filling position, and if it is in the mud filling position, the mud gun opens its nozzle. When the mud is not in the mud filling position, the mud gun turns again to move to the mud filling position and fills the outlet with mud. The operation time t4 required for this series of operations was 20 seconds.

  Next, the horizontal movement of the front hole cover that was stopped while suspended was restarted, suspended at the retreat position, stopped the cover, and completed the opening closing process. The operation time t5 required for this was 30 seconds.

  In this conventional method 2, the total operation time (t3 + t4 + t5) was 80 seconds, the same as in the conventional method 1, but the dust generation time (t3 + t4) was reduced to 50 seconds.

  FIG. 5 is an operation flowchart of the front hole cover and the mud gun when the tap hole is closed when the operation control method (continuous automatic operation) of the present invention is applied (this is referred to as “method 1 of the present invention”).

  In the method 1 of the present invention, after starting the closing operation of the sprue port, when the scissor cover 3 'mounted at the front scissor cover mounting position is lifted and the horizontal movement is started, the moving position shown in FIG. The predictive calculation device 11 calculates the movement speed of the front hole cover and predicts the movement position from the time change of the current position detected by the position detection sensor 13c of the front hole cover. Further, the tap door device control arithmetic device 7 predicts the separation timing from the overlap region 6 based on the positional relationship with the operating range overlap region 6 of the tap port device shown in FIG.

  The spout opening device control arithmetic unit 7 further determines whether or not the mud gun may start turning based on the prediction of the separation timing and the turning speed of the mud gun set in advance (the mud gun Judge whether or not to collide. That is, a calculation for obtaining the timing of starting the turning of the mud gun is performed. If it is determined that there is no collision, at the same time the movement of the forehead cover is continued, and at the same time, the outlet device control arithmetic unit 7 is connected to the mud gun through the mud gun control device 8 so that the mud gun starts turning. An operation command signal is issued to the hydraulic drive device 12a, and the swivel movement of the mud gun starts. If it is not determined that there is no collision, the above calculation is repeated. After it is determined that there is no collision, the movement of the fore hole cover is continued and the mud gun starts to turn. In the test operation, the time t6 required until the mud gun started to turn was 15 seconds.

  After that, the swivel movement of the mud gun and the movement of the forehead cover proceeded at the same time, and the mud gun entered the overlapping area 6 immediately after the forehead cover left the overlapping area 6. 5 indicate that “cover-overlapping area leaving” and “mad gun overlapping area intrusion” are performed at the same timing. After that, the mud gun moves to the mud filling position, presses the nozzle to the outlet, and fills the mud.On the other hand, the hole front cover continues to move horizontally and stops at the retracted position by hanging the cover. Completed the opening and closing movement. During this time, the operation time t7 required for the operation of the mud gun was 20 seconds, and the operation time t8 required for the operation of the front hole cover was 45 seconds.

  In the method 1 of the present invention, the total operation time (t6 + t8) was 60 seconds, and the dust generation time (t6 + t7) was 35 seconds, which was significantly reduced compared to the conventional method 1 or the conventional method 2.

2. Operation at the time of opening the tap opening During the opening operation, the opening device is opened from the retracted position to the position before the tap opening in response to the opening operation start command from the tap control device 7 shown in FIG. When the drilling hole is opened, the drill rod is retracted, and when the retracting is completed, the opening device rotates backward (reversely rotates) in the reverse direction and returns to the retracted position. . The “operation at the time of opening the tap hole” here is an operation after the opening of the hole opening device is reversed.

  FIG. 6 is an operation flowchart of the hole opening device and the hole front saddle cover when the tap hole is opened by a conventional method (single operation) (this is referred to as “conventional method 3”). The series of operations performed here is performed by stopping the opening device at the retracted position by the spout device control arithmetic device 7 (using the opening device control device 10 and the reed cover control device 9) shown in FIG. After confirming, automatic operation control was performed based on a program to start the movement of the hole front cover.

  In the conventional method 3, the opening operation of the tap opening is started, the opening (penetration) of the tap opening 5 by the opening device 2 ′ is completed, and the drill rod is retracted, and then the opening device is reversed. Turn and move towards the retracted position. Next, the spout opening device control arithmetic unit 7 determines whether or not the opening device is in the retracted position based on a signal from the position detection sensor 14b of the opening device. If it is in the retracted position, the aperture device is stopped, and if it is not in the retracted position, the aperture device is reversely rotated again and stopped at the retracted position. In the test operation, the operation time t9 required for this series of operations was 30 seconds.

  After confirming that the hole opening device has stopped at the retracted position, the hole fore cover 3 in the retracted position starts to move, moves to the position for attaching the hole front cover for the output, and the cover on the output Installation is complete. The operation time t10 required for this was 60 seconds.

  In this conventional method 3, the total operation time (t9 + t10) was 90 seconds, and the dust generation time was also 90 seconds.

  FIG. 7 is an operation flowchart of the opening device and the hole culvert cover at the time of opening the taphole by the conventional method (interlocking operation) (this is referred to as “conventional method 4”). The series of operations performed here are the positions attached to the opening device by the spout device control arithmetic device 7 (using the opening device control device 10 and the front hole cover movement control device 9) shown in FIG. After confirming that the opening device has left the operating range overlapping region 6 of the tap opening device shown in FIG. 1 by using the detection sensor 14b, based on the program that the fore hole cover starts to move. Automatic operation was controlled.

  In this conventional method 4, the opening operation of the tap opening is started, the opening (penetration) of the tap opening 5 by the opening device 2 ′ is completed, and the drill rod is retracted. It turns in the reverse direction and moves toward the retracted position. Next, based on the signal from the position detection sensor 14b of the hole opening device, the tap hole device control calculation device 7 has left the operating range overlapping region 6 of the tap hole device shown in FIG. Determine whether or not. If it is out of the overlapping area 6, the hole-opening device is temporarily stopped. If it is within the overlapping area 6, the hole-opening device is reversely rotated again to be separated from the overlapping area 6 and temporarily stopped. In the test operation, the operation time t11 required for this series of operations was 20 seconds.

  Subsequently, the front hole cover at the retracted position starts to move. Based on the signal from the hole front cover position detection sensor 13c, the spout opening device control arithmetic unit 7 determines whether or not the front hole cover has moved to the front hole cover cover mounting position. If it is determined, if it is in the hole front cover installation position, install the cover on the output, and if it is not in the hole front cover installation position, move the hole front cover further and install the cover on the output. To do. The operation time t12 required for this series of operations was 60 seconds.

  Next, the reverse turning of the stopped opening device was restarted, stopped at the retracted position, and the opening operation was completed. The operation time t13 required for this was 10 seconds.

In this conventional method 4, the total operation time (t11 + t12 + t13) was 90 seconds as in the case of the conventional method 3, but the dust generation time (t11 + t12) was shortened to 80 seconds.
FIG. 8 is an operation flowchart of the hole opening device and the hole culvert cover at the time of opening the tap hole when the operation control method (continuous automatic operation) of the present invention is applied (this is referred to as “method 2 of the present invention”). ).

  In the method 2 of the present invention, the opening operation of the tap opening is started, the opening (penetration) of the tap opening by the punching device is completed, and the drilling device is reversely rotated. When moving, the movement position prediction calculation device 11 shown in FIG. 2 calculates the reverse turning speed of the opening device and the prediction calculation of the movement position from the time change of the current position detected by the position detection sensor 14b of the opening device. To do. Furthermore, the tap door device control arithmetic unit 7 predicts the separation timing from the overlapping region 6 based on the positional relationship with the overlapping region 6 shown in FIG.

  The spout opening device control arithmetic unit 7 further determines whether or not the hole front saddle cover may start moving based on the prediction of the separation timing and the preset movement speed of the hole front saddle cover (hole Determine whether the front cover does not collide with the opening device. That is, the calculation for obtaining the timing of starting the movement of the hole front saddle cover is performed. If it is determined that the collision does not occur, the opening device control arithmetic unit 7 continues the movement of the hole opening device, and at the same time the hole opening rod control calculation device 7 starts the movement of the hole leading rod cover movement control device 9. An operation command signal is issued to the hydraulic drive device 13a of the hole front saddle cover through the hole, and the movement of the hole front saddle cover starts. If it is not determined that there is no collision, the above calculation is repeated, and after it is determined that there is no collision, the movement of the hole opening device is continued by the reverse rotation, and the movement of the hole fore cover starts. In the trial operation, the required time t14 until the start of the movement of the front hole cover was 5 seconds.

  Thereafter, the movement of the hole punch cover and the movement of the opening device by reverse rotation proceeded at the same time, and the hole punch cover entered the overlapping region 6 immediately after the opening device separated from the overlapping region 6. The horizontal double-headed arrows shown in FIG. 8 indicate that “opening device overlapping region leaving” and “樋 cover overlapping region intrusion” are performed at the same timing. Thereafter, the front hole cover moved to the position where the front hole cover was attached to cover the cover, and the hole opening device returned to the retracted position to complete the opening opening movement. During this time, the operation time t15 required for the movement of the hole front saddle cover was 60 seconds, and the operation time t16 required for the operation of the opening device was 25 seconds.

  In the method of the present invention, the total operation time (t14 + t15) was 65 seconds, and the dust generation time (t14 + t15) was also 65 seconds, which was significantly shortened compared to the conventional method 3 or the conventional method 4.

  According to the blast furnace outlet device and the operation control method thereof of the present invention, the front hole cover is not mounted on the outlet while reliably preventing the mud gun, the front hole cover and the opening device from colliding with each other. It is possible to minimize the occurrence of hot metal splashing and dust generation in a short time. Therefore, the blast furnace outlet device and the operation control method thereof according to the present invention are extremely useful as an apparatus and method used when the outlet is closed or opened.

It is explanatory drawing which shows typically the structural example of the principal part of the blast furnace outlet device of this invention. It is a control system diagram which shows the operation control method of the blast furnace outlet apparatus of this invention. It is an operation | movement flowchart of a hole front lid cover and a mud gun at the time of a taphole closing by the conventional method (single operation). It is an operation | movement flowchart of a hole front lid cover and a mud gun at the time of a taphole closing by the conventional method (linked operation). It is an operation | movement flowchart of a hole front saddle cover and a mud gun at the time of a tap hole closing when the operation control method (continuous automatic operation) of this invention is applied. It is an operation | movement flowchart of a hole opening apparatus and a hole front culvert cover at the time of hole opening opening by the conventional method (single operation). It is an operation | movement flowchart of a hole opening apparatus and a hole front culvert cover at the time of hole opening opening by the conventional method (interlocking driving | operation). It is an operation | movement flowchart of a hole opening apparatus and a hole front saddle cover at the time of opening of a tap hole at the time of applying the operation control method (continuous automatic operation) of this invention.

Explanation of symbols

1: Mud gun (retracted position)
1 ': Mud gun (mud filling position)
1 ″: Mud gun turning trajectory 2: Opening device (retracted position)
2 ': Opening device (opening position)
2 ″: Opening device turning trajectory 3: Hole front cover (retracted position)
3 ': Front hole cover (hole front cover mounting position)
3 ″: Hole front cover movement trajectory 4: Blast furnace main body 5: Outlet opening 6: Operating range overlap area of the outfall opening device 7: Outlet opening device control arithmetic unit 8: Mud gun control device 9: Hole front dredge cover movement Control device 10: Hole opening control device 11: Movement position prediction calculation devices 12a, 13a, 14a: Hydraulic drive devices 12b, 13c, 14b: Position detection sensor 13b: Limit switch

Claims (3)

  It is possible to move between the mud filling position and the mud gun retracting position, and it is possible to move between the mud gun that fills the blast furnace outlet with mud, and the front hole cover mounting position and the front hole cover retracting position, A front hole cover that covers the spout, a hole opening device that can move between the opening position and the retraction device retreat position, and that opens the spout opening, the mud gun, and the front hole cover And an operation control method of a blast furnace outlet device that includes an outlet device control arithmetic unit that controls the movement of each of the opening devices, wherein the front hole cover is a hole during the opening closing operation. Detects the current position when moving from the front lid cover mounting position to the retracted position, and continuously outputs the detected current position to the outlet port device control arithmetic unit, and changes the respective current positions output. Based on this, the moving speed of the hole front cover is calculated. Using the moving speed, predict the time when the forehead cover goes out of the swivel trajectory of the mud gun, and further calculate the timing when the mud gun does not collide with the forehead cover based on the prediction and the set swivel speed of the mud gun. The operation control method for the blast furnace outlet device is characterized in that the mud gun automatically starts turning and moves to the mud filling position, and the outlet is closed at the mud filling position.   It is possible to move between the mud filling position and the mud gun retracting position, and it is possible to move between the mud gun that fills the blast furnace outlet with mud, and the front hole cover mounting position and the front hole cover retracting position, A front hole cover that covers the spout, a hole opening device that can move between the opening position and the retraction device retreat position, and that opens the spout opening, the mud gun, and the front hole cover And an operation control method of a blast furnace outlet device that includes an outlet device control arithmetic unit that controls the movement of each of the opening devices, and after the opening is completed, Detects the current position when the device revolves back and forth from the opening position to the retracted position, and continuously outputs the detected current position to the outlet device control arithmetic unit, and changes in the output current positions On the basis of the rotation speed of the opening device. Using the retreat speed, the time for the hole opening device to go out of the range of movement of the hole forehead cover is predicted, and the hole fore cover does not collide with the hole opening device based on the prediction and the set moving speed of the hole forehead cover. The timing is calculated, and at that timing, the front hole cover automatically starts to move to the front hole cover mounting position, and the front hole cover is mounted on the outlet. The operation control method of the mouth opening device. It is possible to move between the mud filling position and the mud gun retracting position, and it is possible to move between the mud gun that fills the blast furnace outlet with mud, and the front hole cover mounting position and the front hole cover retracting position, A front hole cover that covers the spout, a hole opening device that can move between the opening position and the retraction device retreat position, and that opens the spout opening, the mud gun, and the front hole cover And an outlet device control arithmetic device that controls the movement of each of the opening devices, and the outlet device control arithmetic device includes a current position of the front hole cover when moving from the mounting position to the retracted position. Using the moving speed calculated based on the change in position, predict the time when the hole front cover goes out of the swivel trajectory of the mud gun. At the timing, The circuit for automatically starting the swivel from the retracted position to the mud filling position, and / or the swivel retreat speed calculated based on the change in the current position of the opening device when revolving from the opening position to the retracted position. The time when the hole punching device goes out of the movement range of the hole puncher cover is predicted, and at the timing when the hole puncher cover calculated based on the prediction and the setting movement speed of the hole puncher cover does not collide with the hole punching device, A blast furnace outlet device in which a circuit for automatically starting movement of the front hole cover from the retracted position to the mounting position is incorporated.

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