JP2002371308A - Blast furnace tap-hole unit and operation controlling method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a unit for tapping in a blast furnace, which surely prevents mutual collision among a mud gun of a tap hole device, a flume cover in front of the hole, and a hole opening unit, and enables a continuous operation of the devices in opening and closing of the tap hole, and to provide an operation controlling method therefor. SOLUTION: The blast furnace tap-hole unit is characterized by detecting each current position of the mud gun, the flume cover in front of the hole, and the hole opening unit, and by performing either treatment of (1) when the hole opening unit is located in an hole opened position, stopping movement of both the mud gun and the flume cover in front of the hole, (2) when the mud gun is located in a mud charging position, stopping movement of both the hole opening unit and the flume cover in front of the hole, and (3) when the flume cover in front of the hole is located in the mounting position for the flume cover, stopping movement of both the hole opening unit and the mud gun, on the basis of the each detected position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blast furnace taphole apparatus and an operation control method thereof, and more particularly to a blast furnace taphole apparatus used for opening and closing a blast furnace taphole. It relates to a control method.

[0002]

2. Description of the Related Art A mud gun, a hole front gutter cover, and a hole opening device are all provided movably in front of a tap hole, and by appropriately moving these devices, the opening and closing of the tap hole are performed. Is performed.

[0003] That is, when opening the tap hole, first, the mud gun is moved to the mud gun retreat position, and then the drilling device is moved to the tap hole position to open the tap hole. An operation is performed in which the hole device is moved to the evacuation position, and then the hole front gutter cover is moved to the tapping gutter in order to prevent hot metal from scattering from the tapping gutter.

On the other hand, when the tap hole is closed, first, the hole front gutter cover is moved to the hole front gutter cover retreat position, and then,
The operation of moving the mud gun to the taphole and filling the taphole with refractory material is performed.

[0005] Each of the devices such as the hole opening device, the mud gun and the hole front gutter cover is provided with means for detecting the position of each device. The position is confirmed, and movement, positioning, and evacuation with respect to the taphole are performed. For example, JP-A-63-6280
No. 7 and JP-A-8-333610 disclose a position detecting means for detecting the position of the hole opening device, and a tap hole of the hole opening device based on a position signal of the hole opening device detected by the position detecting means. A hole opening device provided with a control means for performing movement, positioning, and retreat with respect to a hole is disclosed.

[0006]

As described above, the opening device, the mud gun, and the hole front gutter cover are provided so as to be movable between their respective retracted positions and tapholes. The user confirms the position of each device, and each device is moved.

[0007] However, there is a problem that when an operator performs an erroneous operation, a collision between devices occurs. Also,
When moving the hole opening device, hole gutter cover and mud gun equipment (hereinafter collectively referred to as taphole equipment), it is necessary for the operator to check the position of each equipment. There has been a problem that the operation of the hole or the hole cannot be continuously performed. The object of the present invention is to solve the above-mentioned problems of the prior art, to reliably prevent mutual collision of a tapping equipment, such as a mud gun, a hole front gutter cover and a hole opening device, and to open and close a hole of a tapping hole. It is an object of the present invention to provide a blast furnace tapping apparatus which enables continuous operation of taphole equipment at the time of the above and a method of controlling the operation thereof.

[0008]

As described above, the mud gun, the hole front gutter cover, and the hole opening device are provided so as to be movable, for example, swiveling, in front of the taphole and in their respective retracted positions. The collision between the devices occurs when two or more devices are simultaneously present in an area where the trajectories of the devices overlap by two or more. Therefore, collision of each device can be prevented by allowing only one device to enter such an area at the same time.

The present invention has been completed based on the above concept, and the gist thereof is as follows. The present invention
It is possible to move between the mud filling position and the mud gun retreat position, and to move the mud gun for filling the blast furnace taphole with mud, and the hole front gutter cover mounting position and the hole front gutter cover retreat position, A hole gutter cover for covering a tapping gutter, an opening device capable of moving between an opening position and an opening device retracting position and opening a taphole, the mud gun, and the hole front gutter cover And a tap hole device control device that controls the movement of each of the opening devices, and a method for controlling the operation of a blast furnace tap hole device, comprising: a mud gun, a hole front gutter cover, and the hole opening device. A current position is detected, and each detected current position is output to the taphole device control device. Based on each output current position, the taphole device control device determines the following (1) to (3) Execute the processing shown in the above) Emissions, operation control method for a blast furnace taphole apparatus characterized by preventing mutual collision of the holes before gutter cover and the opening device is.

(1) When the hole opening device is located at the hole opening position, the movement of the mud gun and the movement of the hole front gutter cover are both stopped. (2) When the mud gun is located at the mud filling position, the movement of the hole opening device and the movement of the front gutter cover are both stopped.

(3) When the front gutter cover is located at the front gutter cover mounting position, the movement of the opening device and the movement of the mud gun are both stopped. From another viewpoint, the present invention provides a mud gun capable of moving between a mud filling position and a mud gun retracting position, and a hole movable between a hole front gutter cover mounting position and a hole front gutter cover retracting position. A gutter cover, an opening device capable of moving between an opening position and an opening device retreat position, and a taphole device for controlling movement of the mud gun, the hole front gutter cover, and the opening device, respectively. And a tapping device control device based on the current positions of the mud gun, the hole front gutter cover, and the hole opening device.
A blast furnace taphole device incorporating a circuit for executing the process shown in (3).

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a blast furnace taphole apparatus and an operation control method thereof according to the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is an explanatory view schematically showing the configuration of a taphole apparatus according to the present embodiment. FIG. 2 is a control system diagram illustrating the operation control method of the present embodiment. As shown in FIG.
This taphole device includes a mud gun 1, a hole front gutter cover 4, a hole opening device 7, and a taphole device control device 14 (see FIG. 2). The mud gun 1 turns and moves in a swivel range 10 between a mud filling position 1a and a mud gun retreat position 1b, and fills the tap hole with the mud at the mud filling position 1a.
The fore-gutter cover 4 is attached to the fore-gutter cover moving device 5, and the swivel range 11 between the fore-gutter cover mounting position 4a and the fore-gutter cover retreat position 4b is operated by the operation of the fore gutter cover moving device 5. Swivel to move, and the hole front gutter cover mounting position 4
It is attached to the tapping gutter at a. The opening device 7 has an opening position 7a.
The swivel range 12 is swung and moved between the opening position 7b and the opening device evacuation position 7b, and the tap hole is opened at the opening position 7a.

The mud gun 1, the hole front gutter cover 4 and the hole opening device 7 are detectors for detecting respective positions, that is, the mud gun position detector 3, the hole front gutter cover position detector 6, and the hole opening device position detector. 8 is provided. These position detectors can be known position detectors, for example, a pulse generator, a limit switch, a detector for a liquid amount integration method, and the like.

As shown in FIG. 2, a taphole equipment control device 1
Reference numeral 4 denotes a mud gun control device 15 for controlling the operation of the mud gun 1 and a fore gutter cover movement control device 1 for controlling the operation of the fore gutter cover moving device 5 to which the fore gutter cover 4 is attached.
6 and a hole control device 17 for controlling the operation of the hole opening device 7, the operation / stop command signal is output, and the operation of the mud gun 1, the hole front gutter cover moving device 5, and the hole opening device 7 is totally controlled. .

The taphole equipment control device 14 has the following processing circuits (1) to (3). The mudgun 1, the hole front gutter cover 4 detected by the position detectors 3, 6, and 8, and By controlling the operation of the mud gun control device 15, the hole gutter cover movement control device 16 and the hole control device 17 based on the current position of each device of the hole opening device 7, the mud gun 1 and the hole front gutter cover 4 are controlled. And the mutual collision of the hole opening device 7 can be prevented reliably.

(1) When the opening device 7 is located at the opening position 7a, the movement of the mud gun 1 and the movement of the hole front gutter cover 5 are both stopped. (2) When the mud gun 1 is located at the mud filling position 1a, the movement of the hole opening device 7 and the movement of the hole front gutter cover 4 are both stopped.

(3) When the hole front gutter cover 4 is located at the hole front gutter cover mounting position 4a, the movement of the hole opening device 7 and the movement of the mud gun 1 are both stopped. At the time of opening the tap hole, the operation of the hole front gutter cover moving device is performed based on the opening completion signal from the opening control device that controls the operation of the opening device 7 and the retraction completion signal of the opening device. By starting the rotation of the hole front gutter cover at the start, the continuous operation of the opening operation and the gutter cover mounting operation becomes possible.

When the taphole is closed, a hole front gutter cover removal operation completion signal and a hole front gutter cover retreat completion signal from the hole front gutter cover movement control device for controlling the operation of the hole front gutter cover movement device. By driving the drive unit of the mud gun based on the above, the turning of the mud gun is started, so that the continuous operation of the work of removing the front gutter cover and the operation of closing the mud gun can be performed.

By realizing continuous operation at the time of opening and closing, the operation of opening and closing the taphole can be performed remotely, and the labor before taphole operation can be reduced. .

[0021]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a description will be given with reference to a control system diagram shown in FIG. The mud gun 1 has an analog detector 18 for detecting information such as a mud gun hydraulic pressure (swing, tilting) and a mud filling stroke, a limit switch 19 for detecting a mud gun turning limit and the like, and a position for detecting mud gun turning angle information. And a detector 3. The signal of the information and the signal of the limit switch are output to a mud gun operation circuit 15a constituting the mud gun control device 15.

The mud gun controller 15 controls the operation of the mud gun based on the information output to the mud gun operating circuit 15a and the signal of the limit switch. Then, the turning control of the mud gun 1 is performed. At this time, the signal of the turning angle detected by the position detector 3 is output to the taphole device control device 14, and the turning position of the mud gun 1 is recognized.

The hole gutter cover moving device 5 includes an analog detector 22 for detecting information such as a hydraulic pressure of the hole gutter cover moving device, and a limit switch 23 for detecting a turning limit of the hole gutter cover moving device 5. And a position detector 6 for detecting information on the turning angle of the hole front gutter cover moving device 5. The position of the hole front gutter cover can be recognized based on the turning angle detected by the position detector 6. The information signal and the signal from the limit switch 23 are transmitted to the hole front gutter cover movement control device 16.
Is output to the hole front gutter cover operation circuit 16a.

The hole gutter cover movement control device 16 controls the operation of the hole gutter cover movement device based on the information output to the hole gutter cover operation circuit 16a and the signal of the limit switch 23. At the time, the hole front gutter cover moving device 5
The driving device 24 is controlled based on the turning angle of the hole, and the turning control of the hole front gutter cover moving device 5 is performed. At this time, the signal of the turning angle detected by the position detector 6 is transmitted to the taphole device control device 1.
4, the position of the hole front gutter cover attached to the hole front gutter cover moving device is recognized.

The hole opening device 7 includes an analog detector 26 for detecting information such as the position and the feed speed of the hole opening rod, and the hydraulic pressure of the hole opening device (hole hitting force, turning, tilting), and the like. The apparatus includes a limit switch 27 for detecting a turning limit, a feed limit of an opening rod, and the like, and a position detector 8 for detecting information on a turning angle of the opening device. The signal of the information and the signal of the limit switch 27 are output to the drilling device operation circuit 17a constituting the drilling control device 15.

The hole opening control device 17 includes a hole opening device operation circuit 1.
The operation of the hole opening device is controlled based on the information output to 7a and the signal of the limit switch 27.
Controlling the driving device 29 based on the turning angle of the opening device;
The turning control of the opening device is performed. At this time, a signal of the turning angle detected by the position detector 8 is output to the taphole device control device 14, and the turning position of the hole opening device 7 is recognized.

When the operation of the mud gun 1 is started, an operation start signal is sent from the mud gun operation circuit 15a to the taphole device control device 1
4, when the operation of the hole front gutter cover moving device 5 is started, an operation start signal is transmitted from the hole front gutter cover moving operation circuit 16a to the taphole device control device 14, and when the operation of the hole opening device 7 is started. An operation start signal is transmitted from the drilling device operation circuit 17a to the taphole device control device 14.

The taphole device control device 14 executes the following processes (i) to (iii) based on the position of each device and the operation start signal of each device. (I) When the operation start signal of the mud gun 1 is received, when the hole front gutter cover 4 is not at the hole front gutter cover retracting position 4b and the hole opening device 7 is not at the hole opening device retracting position 7b, the tap hole is set. A stop signal is transmitted from the device control device 14 to the mud gun control device 15, and the drive device 20 is stopped.

(Ii) When the operation start signal of the hole gutter cover moving device 5 is received, the mud gun 1 is not at the mud gun retreat position 1b, and the hole opening device 7 is at the hole retreat position 7
If not, the stop signal is transmitted from the taphole device control device 14 to the mudgun control device 15 and the drive device 24 is stopped.

(Iii) When the operation start signal of the opening device 7 is received, the mud gun 1 is not at the mud gun retreat position 1b, and the hole front gutter cover 4 is moved to the hole front gutter cover retreat position 4b.
If not, a stop signal is transmitted from the taphole device control device 14 to the hole opening control device 17 and the driving device 28 is stopped.

The operation operation end signal of each device is transmitted from the mud gun control device 15, the hole front gutter cover movement control device 16 and the hole control device 17 to the tap hole device control device 14, and the tap hole device control device 14 By transmitting each device operation start signal to the mud gun control device 15, the hole front gutter cover movement control device 16 and the hole control device 17, continuous operation between the devices becomes possible. FIG. 3 is a flowchart of the continuous operation at the time of tap hole opening. FIG. 4 is a flowchart of the continuous operation when the taphole is closed.

The operation procedure of each equipment when the tap hole is opened and closed will be described below with reference to FIGS. 1, 3 and 4. When the taphole is opened: S1: Start operation.

S2: The opening start button is turned ON. S3: The tap hole equipment control device 14 determines whether or not the hole gutter cover 4 is located at the hole gutter cover retreat position 4b based on a signal from the hole gutter cover position detector 6.

S4: When the hole gutter cover 4 is not located at the hole gutter cover retreat position 4b, the operation of the hole opening device 7 is stopped. S5: The tap hole equipment control device 14 determines that the mud gun 1 is located at the mud gun retracting position 1b based on the signal from the mud gun position detector 3 when the drilled gutter cover 4 is at the retracted position 4b. Is determined.

S6: When the mud gun 1 is not located at the mud gun retreat position 1b, the operation of the hole opening device 7 is stopped. S7: When the mud gun 1 is located at the mud gun retracting position 1b, the hole opening device 7 is moved from the hole opening device retracting position 7b to the hole opening device opening position 7a.

S8: The opening of the taphole is started. S9: The tap hole equipment control device 14 receives the signal of the tap hole opening completion from the hole opening device 7, and confirms the opening of the tap hole.

S10: The opening device 7 is moved to the opening device opening position 7
a to the hole opening device retreat position 7b. S11: The taphole device control device 14 determines whether or not the drilling device 7 is located at the drilling device retreat position 7b based on a signal from the drilling device position detector 8.

S12: The opening device 7 is in the retracting position 7 of the opening device.
When it is not located at b, the operation of the hole front gutter cover moving device 5 is stopped. S13: When the opening device 7 is at the opening device retracted position 7b,
The taphole equipment control device 14 determines whether or not the mud gun 1 is located at the mud gun retreat position 1b based on a signal from the mud gun position detector 3.

S14: When the mud gun 1 is not located at the mud gun retreat position 1b, the operation of the hole opening device 7 is stopped. S15: When the mud gun 1 is located at the mud gun retreat position 1b, the fore gutter cover 4 is moved from the fore gutter cover retreat position 4b to the fore gutter cover mounting position 4a along the fore gutter cover moving device turning range 11. Moving.

S16: The front gutter cover 4 is positioned at the front gutter cover mounting position 4a. S17: A signal indicating the completion of positioning of the hole front cover 4 to the hole front gutter cover mounting position 4a is transmitted to the hole front gutter cover movement control device 16, and the taphole opening continuous operation ends.

When the taphole is closed: S18: Start operation. S19: The closing start button is turned on.

S20: The tap hole equipment control device 14 determines whether or not the hole opening device 7 is located at the hole opening device retracting position 7b based on the signal from the hole opening device position detector 8. S21: When the hole opening device 7 is not located at the hole opening device retreat position 7b, the operation of the hole front gutter cover moving device 5 is stopped.

S22: The opening device 7 is in the retracting position 7 of the opening device.
b, the taphole device control device 14 detects the mudgun retreat position 1b based on the signal from the mudgun position detector 3.
It is determined whether or not the mad gun 1 is located at the position.

S23: When the mud gun 1 is not located at the mud gun retreat position 1b, the operation of the hole front gutter cover moving device is stopped. S24: When the mud gun 1 is located at the mud gun retreat position 1b, the front gutter cover is removed.

S25: The hole gutter cover moving device 16 is turned to start moving the hole gutter cover 4 from the hole gutter cover mounting position 4a to the hole gutter cover retracting position 4b. S26: Movement of the hole front gutter cover 4 is completed.

S27: The tap hole equipment control device 14 controls the hole front cover 4 based on a signal from the hole front gutter cover position detector.
Is determined to be retracted to the hole front gutter cover retreat position 4b.

S28: When the hole gutter cover 4 is not located at the hole gutter cover retreat position 4b, the operation of the mud gun 1 is stopped. S29: When the hole front gutter cover 4 is at the hole front gutter cover retreat position 4b, the taphole device controller 14 sets the hole opening device 7 to the hole device retreat position based on a signal from the hole device position detector 8. 7b is determined.

S30: The opening device 7 is at the opening device retracting position 7
When it is not located at b, the operation of the mud gun 1 is stopped. S31: When the hole opening device 7 is located at the hole opening device retreat position 7b, the mud gun 1 is moved from the mud gun retreat position 1b to the mud gun filling position 1a.

S32: The mud is filled into the tap hole from the mud gun, and the tap hole is started to be closed. S33: The tap hole device control device 14 confirms the tap hole closing based on the tap hole closing completion signal from the mud gun 1.

S34: The mud gun 1 is moved from the mud gun filling position 1a to the mud gun retracting position 1b. S35: The tap hole equipment control device 14 receives a signal indicating that the mud gun 1 has moved to the mud gun retreat position 1a from the mud gun position detector 3, and terminates the continuous operation of the tap hole closing hole.

When the mud gun 1 is operated, the interlock condition is that the hole front gutter cover 4 is located at the hole front gutter cover retreat position 4b and the hole opening device 7 is located at the hole device retreat position 7b. By doing so, collision of the devices can be prevented.

When the hole opening device 7 is operated, the interlock condition is that the hole front gutter cover is located at the hole front gutter cover retracting position 4b and the mud gun is located at the mud gun retracting position 1b. Equipment collision can be prevented.

During operation of the hole front gutter cover moving device 5, the position of the hole opening device and the position of the mud gun are detected and the hole opening device 7 is moved.
It is possible to reliably prevent the collision of the devices by setting the interlock condition that the hole is located at the hole retracting position 7b and that the mud gun is located at the mud gun retracting position 1b.

In the description of the present embodiment and examples, the mud gun, the hole front gutter cover, and the hole opening device are respectively
Between the mud gun filling position 1a and the mud gun retreat position 1b, between the hole front gutter cover mounting position 4a and the hole front gutter cover retreat position 4b, and the hole position 7a and the hole device retreat position 7
This is an example in which the robot moves while turning between “b” and “b”. However, the present invention is not limited to this.

[0055]

According to the present invention, it is possible to reliably prevent the front gutter cover, the mud gun and the hole opening device from colliding with each other due to an erroneous operation by the operator. This makes it possible to continuously operate the hole front gutter cover moving device, the mud gun, and the hole opening device at the time of opening or closing, and to perform the opening and closing operations remotely from an operation room or the like. it can. as a result,
It is possible to reduce the opening and closing work of the tap hole of the blast furnace,
The effect of labor saving and sufficient enhancement of safety is achieved.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram schematically showing a configuration of a taphole device of the present embodiment.

FIG. 2 is a control system diagram illustrating an operation control method according to the present embodiment.

FIG. 3 is a flowchart of a continuous operation when a tap hole is opened.

FIG. 4 is a flowchart of a continuous operation when a taphole is closed.

[Explanation of symbols]

1: mud gun, 1a: mud filling device, 1b: mud gun retreat position, 2: tap hole, 3: mud gun position detector, 4: hole gutter cover, 4a: hole gutter cover mounting position,
4b: Hole front gutter cover retreat position, 5: Hole front gutter cover moving device, 6: Hole front gutter cover position detector, 7: hole opening device, 7
a: opening position, 7b: opening device retreat position, 8: opening device position detector, 9: main gutter, 10, 11, 12: turning range,
13: furnace wall, 14: tap hole equipment control device, 15: mud gun control device, 15a: mud gun operation circuit, 16: hole front gutter cover movement control device, 16b: hole front gutter cover movement operation circuit, 17: opening Control device, 17c: Opening device operation circuit, 18, 22, 26: Analog detector, 19, 23,
27: Limit switch, 20, 24, 28: Drive unit.

Continuation of the front page (72) Inventor Mitsuo Yamamoto 4-53, Kitahama, Chuo-ku, Osaka-shi, Osaka Sumitomo Metal Industries, Ltd. F term (reference) 4K015 EC04 EC05

Claims (2)

[Claims] 1. A mud gun which can be moved between a mud filling position and a mud gun retreat position and fills a mud into a blast furnace taphole, and is provided between a hole front gutter cover mounting position and a hole front gutter cover retreat position. The hole can be moved, a hole front gutter cover that covers the tapping gutter, and can be moved between an opening position and an opening device retreat position, and an opening device that opens a taphole, and the mud gun, An operation control method for a blast furnace taphole device comprising: a taphole device control device for controlling movement of the hole front gutter cover and the hole opening device, wherein the mud gun, the hole front gutter cover, and the opening Each current position of the hole device is detected, and each detected current position is output to the taphole device control device. Based on each output current position, the taphole device control device determines the following ( 1) ~
An operation control method for a blast furnace taphole device, wherein the process shown in (3) is executed to prevent the mud gun, the hole front gutter cover, and the hole opening device from colliding with each other. (1) When the opening device is located at the opening position, the movement of the mud gun and the movement of the hole front gutter cover are both stopped. (2) When the mud gun is located at the mud filling position, the movement of the hole opening device and the movement of the front gutter cover are both stopped. (3) When the hole gutter cover is located at the hole gutter cover mounting position, both the movement of the hole opening device and the movement of the mud gun are stopped. 2. A mud gun capable of moving between a mud filling position and a mud gun retracting position, a hole front gutter cover movable between a hole front gutter cover mounting position and a hole front gutter cover retracting position, An opening device capable of moving between an opening position and an opening device retracting position, and a taphole device control device that controls movement of the mud gun, the hole front gutter cover, and the opening device, respectively. The taphole device control device includes a circuit that executes the following processes (1) to (3) based on the current positions of the mud gun, the hole front gutter cover, and the hole opening device. A blast furnace taphole device characterized in that it has been installed. (1) When the opening device is located at the opening position, the movement of the mud gun and the movement of the hole front gutter cover are both stopped. (2) When the mud gun is located at the mud filling position, the movement of the hole opening device and the movement of the front gutter cover are both stopped. (3) When the front gutter cover is located at the front gutter cover mounting position, both the movement of the hole opening device and the movement of the mud gun are stopped.