JPH06104841B2 - Monitoring method for charging raw material into blast furnace - Google Patents

Description

Detailed Description of the Invention [Industrial applications]

The present invention provides a real-time monitoring of the charging of raw materials into this blast furnace and the real-time monitoring when charging the raw materials discharged from the hopper while moving the tip of the turning chute whose turning radius can be changed. The present invention relates to a method for monitoring the charging of raw materials into a blast furnace, which enables effective collection of operation results in charging the raw materials into the blast furnace.

[Prior art]

In blast furnaces such as bellless blast furnaces and general shaft furnaces where raw materials are charged from the top, a swirling chute that performs swirling motion is adjusted while adjusting the opening of the raw material flow rate control gate (hereinafter referred to as flow control gate). Through this, the raw material is charged into the blast furnace while controlling the inclination angle of the turning chute. In such a method for charging the raw material into the blast furnace, various techniques for improving the uniformity of charging the raw material into the blast furnace and achieving a stable blast furnace operation have been disclosed. In Japanese Patent Laid-Open No. 61-227108, in the method for charging a raw material into a blast furnace using a swirling chute as described above, the charging raw material for one time is discharged from the hopper by grain size, and the inclination angle and swirling speed of the swirling chute and The discharge speed w is controlled according to the area of each charging zone in the furnace, the swirl speed of the swirling chute is gradually increased, and the control of the discharge speed w of the raw material from the hopper and the swirl chute swirling control are used together. By controlling the discharge speed w of the raw material from the hopper while keeping the turning condition of the turning chute constant, it is possible to stably maintain the inclination angle of the tilted accumulation of the raw material fed into the furnace from the furnace wall toward the core. Therefore, there is disclosed a technique of improving the controllability of the gas flow distribution in the furnace, the heat distribution of the furnace, and the like to achieve stable operation of the blast furnace. In JP-A-62-63606, in the raw material charging apparatus for a blast furnace using a swirl chute as described above, the raw material distribution in the circumferential direction in the blast furnace is calculated from the information on the raw material discharge speed w from the hopper and the swirl angle of the swirl chute. Of the raw material weight, ore species, particle size, ore / coke ratio, etc., by the raw material charging device of the blast furnace, which is configured by each means for performing the subsequent raw material charging based on this actual value. There has been disclosed a technique relating to a raw material charging apparatus for a blast furnace, which can always obtain an appropriate and uniform charging distribution regardless of changes in temperature, variations in equipment, and the like. In Japanese Patent Laid-Open No. 2-11711, when charging a raw material into a blast furnace using a swirling chute as described above, the charging in the circumferential direction in the blast furnace is performed based on the discharge from a hopper scale and the input of the swirling angle of the swirling chute. We will monitor the results of the distribution of incoming goods,
Based on this result, based on the mathematical model of segregation, the ore for several batches, the raw material weight for each coke, and the cumulative value of the discharge order are constant values over all turning angles based on the segregation mathematical model. Disclosed is a technique of preventing the segregation of the raw material charging into the blast furnace and ensuring stable blast furnace operation by dynamically performing feedback calculation of the charging discharge timing and charging the raw material based on the calculation result. Has been done.

[Problems to be Solved by the Invention]

However, the above-described conventional method of charging a raw material into a blast furnace using a swirling chute is a normal-time raw material charging method using a raw material that has been used in the past. Even if the equipment operating conditions such as the opening of the flow control gate, the tilt angle of the turning chute, and the turning speed are the same, the charging state changes if the properties of the charged raw materials are different. For example, the type of raw material to be charged, the charging amount, the charging speed w (discharge speed w)
When the particle size and particle size change, the state of charging the raw material into the blast furnace changes. In addition, even in equipment for charging raw materials into a blast furnace, there are cases in which operational restrictions are imposed on the rotational speed and inclination angle of the swirling chute due to equipment maintenance and the like. When there are restrictions on the operation of the raw material that has not been used in the past and the operation of the equipment, it is common to charge the raw material to the blast furnace by manual operation according to the operator's judgment. It was target. In such a manual operation, there are limitations in monitoring the charging of raw materials such as the state of charging the raw materials in the blast furnace cannot be easily visually observed, and there is a problem in stable operation of the blast furnace. In addition, in the charging of raw materials into such a blast furnace, it was conventionally sufficient to monitor that the opening control of the flow control gate, the inclination angle control of the turning chute, the turning control, etc. were functioning normally. However, for example, even though the opening of the flow control gate has been opened beyond the target opening, this abnormality cannot be immediately detected, so the obstacle expands to the extent that it interferes with the operation of the blast furnace. There was a problem such as doing. The present invention has been made to solve the above-mentioned conventional problems, and when charging the raw material discharged from the hopper while moving the tip of the turning chute whose turning radius can be changed, this raw material is fed to this blast furnace. Real-time monitoring of raw material charging of the blast furnace and collection of raw material charging operation results into this blast furnace by this monitoring are effectively performed, which improves product quality, improves stability and operating rate of blast furnace, and further It is an object of the present invention to provide a raw material charging monitoring method for a blast furnace, which can prevent various troubles and obtain a lot of valuable data for improving the operation method of the blast furnace.

[Means for Solving the Problems]

A first invention of the present application is, when charging a raw material discharged from a hopper while moving a tip of a turning chute whose turning radius can be varied, inclining angle and turning angle of the turning chute, and a blast furnace interior container. The surface level is measured, the length of the turning chute obtained in advance, and from the tilt angle and the turning angle, the coordinates of the tip of the turning chute are obtained,
From the coordinates of the tip of the swirling chute, the tilt angle, the surface level of the blast furnace interior material, and the drop speed at the time of discharging the material set or obtained in advance, while considering the increase of the falling speed of the material due to gravity. The object is achieved by obtaining the position coordinates of the raw material drop point in the blast furnace. In addition, the second invention of the present application, the raw material discharged from the hopper,
When charging while moving the tip of a swirling chute whose swiveling radius can be changed, at a position where the surface of the charging material is seen from above the blast furnace, and from the swiveling chute itself or from the swirling chute by the swiveling of the swirling chute. Place a reflective rangefinder at a position where it can detect the passage of raw materials while falling,
With this reflection type distance meter, the surface level of the blast furnace interior material is measured, and the passing of the turning chute itself or the passing raw material from the turning chute by the turning of the turning chute is detected, and a predetermined abnormality is detected. According to a diagnostic rule, the measurement value of the surface level of the blast furnace interior charge and the detection of the passage of the swirling chute itself or the material in the fall, and by diagnosing the charging of the raw material into the blast furnace, the same object was achieved. It is a thing.

[Action]

First, in the first invention of the present application, it is very difficult to charge the raw material into the blast furnace by a manual operation, or it is difficult to grasp the raw material charging state even during the automatic operation. This is because it is difficult to grasp the turning state of the turning chute used for charging and the state of the raw material dropping point in the blast furnace. Conventionally, the atmosphere in the blast furnace during operation is not good,
Therefore, it is difficult to directly observe the state inside the blast furnace or install an industrial video camera. The first aspect of the present invention graphically displays the movement of the turning chute and the material dropping point on the graphic CRT without visually observing or installing an industrial video camera.
It is possible to monitor the inside of the blast furnace during operation by plotting the locus of the coordinates of the tip of the turning chute and the locus of the position coordinates of the raw material drop point using an XY plotter. For this purpose, the turning angle and tilt angle of the turning chute are detected in real time, and based on these detected data, the coordinates of the tip of the turning chute and the position coordinates of the material dropping point in the blast furnace are calculated in real time. There is. Next, in the second invention of the present application, the turning chute is swung by using a reflection range finder (microwave sounding meter) which has conventionally detected the loading amount (loading height) of the raw material charged in the blast furnace. The passage of the swirling chute itself or the material falling from the swirling chute is detected, and an abnormality in charging the raw material into the blast furnace is diagnosed according to a predetermined abnormality diagnosis rule. In this reflection type distance meter, conventionally, the passage of the turning chute itself or the raw material falling from the turning chute due to the turning of the turning chute has been detected, but conventionally such a detection of the passage is not used, and rather the raw material There was noise in the load measurement. However, according to the second aspect of the present invention, the reflection range finder is arranged at a position where it is possible to detect the passage of the turning chute itself or the material falling from the turning chute even at various tilt angles of the turning chute, The detection is used to diagnose abnormal charging of raw materials into the blast furnace. This allows
Even if some abnormality or failure occurs in the raw material charging device, this abnormality or failure can be detected promptly, and thus the failure due to such abnormality or failure can be prevented from expanding. Further, the coordinates of the tip of the swirling chute obtained as described above, the position coordinates of the raw material dropping point in the blast furnace, and the diagnosis result of the raw material charging abnormality into the blast furnace are stored and held in a data storage device,
Furthermore, by outputting the monitoring result form from the printing printer, it is possible to obtain a lot of valuable data for improving the blast furnace operating method in the future.

【Example】

Hereinafter, embodiments of the first invention and the second invention of the present application will be described in detail with reference to the drawings. FIG. 1 is a block diagram of a raw material charging apparatus for a blast furnace in which the present invention is implemented. In FIG. 1, the raw material 1 to be charged into the blast furnace 10 is stored in the upper hopper 20. The flow control gate 22 supplies the raw material 1 to the swirling chute 24 by opening the flow control gate 22 at an opening according to the discharge speed w for a predetermined time. The swirling chute 24 is capable of changing the tilt angle α while swirling at an angular velocity ω, whereby the raw material 1 is charged into the furnace wall side circumferential portion of the raw material upper surface in the blast furnace and the furnace core portion. You can do it. The turning angle of the turning chute 24 is β. The level meter 26 is an E microwave sounding meter (not shown).
26a and the W microwave sounding meter 26b measure the distances l ₀ and l ₀ ′ from the respective sounding meters to the upper surface of the raw material 1 in the blast furnace 10 and measure the respective distances l ₀ and l _{0 respectively.} 'Swivel chute rotation speed calculator
Output to 50 and raw material charging monitoring device 54. These E microwave sounding meters 26a are W microwave sounding meters 26b, and while measuring the distance from each sounding meter to the upper surface of the raw material 1 in the blast furnace 10,
The passage of the turning chute 24 itself or the raw material 1 falling from the turning chute 24 due to the turning of the turning chute 24 is detected. The tilt control device 30 positions the servomotor 31 in accordance with the tilt angle command from the turning chute rotation speed calculator 50, whereby the turning chute 24 is moved via the tilt drive mechanism 32.
To the commanded tilt angle α. The turning control device 35 controls the speed of the induction motor 37 in accordance with the turning chute rotation angular velocity command given from the turning chute rotation speed calculator 50, thereby turning the turning chute 24 at the angular velocity ω via the turning drive mechanism 39. It is a thing. A pulse generator 37a is attached to the induction motor 37, and the turning control device 35 obtains a turning angle β of the turning chute 24 based on a signal from the pulse generator 37a. The turning angle β is a turning chute rotation speed calculator. Output to 50. In this turning chute rotation speed calculator 50, the raw material 1 is fed to the upper hopper at the optimum discharge speed w in accordance with the conventional technique.
Flow control gate 22 so that it is discharged from the turning chute 24 from 20
And simultaneously outputs the turning chute rotation angular velocity command to the turning control device 35 so that the turning chute 24 turns at an angular velocity ω during charging of the raw material 1, and simultaneously turns the turning chute.
A tilt angle command is output to the tilt control device 30 so as to change the tilt angle α of 24. As a result, the raw material 1 having the optimum distribution can be charged on the upper surface of the blast furnace 10. In this turning chute rotation speed calculator 50, in addition to such conventional processing, the tilting angle α and the turning angle β of the turning chute 24 and the turning are fed to the raw material charging monitoring device 54 which performs the processing to which the present invention is applied. The rotation speed n detected from the angular velocity ω and the rotation angle β, the discharge drop velocity v of the raw material 1 discharged from the upper hopper 20 to the swing chute 24 via the flow control gate 22, and the raw material 1 in the blast furnace 10 The process of outputting the loading inclination angle θ and the process corresponding to the abnormality warning signal Arm input from the raw material charging monitoring device 54 are performed. The raw material charging monitoring device 54 is configured as shown in FIG. 2, and performs the raw material charging monitoring process to the blast furnace by the inputs from the level meter 26 and the turning chute rotation speed calculator 50 described above. . FIG. 2 is a raw material charging monitoring device 54 used for the raw material charging device for the blast furnace in which the present invention is carried out as described above with reference to FIG.
It is a block diagram of. In FIG. 2, the trajectory calculator 70 indicates that the turning chute 24
The tilting angle α, the turning angle β, and the preset turning chute 24
And the coordinate of the tip of the turning chute, the tilt angle α of the turning chute, the surface level l ₀ or l ₀ ′ of the blast furnace interior entrance, and the raw material set or obtained in advance. The position coordinates of the raw material drop point in the blast furnace are obtained from the discharge drop velocity v. Furthermore, this locus calculator 70
Also creates data on the graphic CRT 60 and XY plotter 62 to display or plot the movement of the swirl chute 24 and the movement of the material drop point in the blast furnace. The diagnostic data processing device 71 is located at a position where the surface of the charging material is seen from above the blast furnace 10 and at a position where it is possible to detect passage of the swirling chute 24 itself or the raw material 1 falling from the swirling chute 24 due to the swiveling of the swirling chute 24. E microwave sounding meter 26a and W microwave sounding meter 2 arranged
Based on the input signal from the level meter 26 to which 6b and 6b are input, the abnormality in the charging of the raw material into the blast furnace 10 is diagnosed. The data storage device 72 stores and saves the data created by the trajectory calculator 70 and the diagnostic data processing device 71, and can store the data for improving the operation method of the blast furnace 10 in the future, for example. The graphic CRT 60 graphically displays the movement of the tip of the turning chute 24 and the movement of the raw material dropping point in the blast furnace 10 as described above, and by being used together with the keyboard 61, various operations of the raw material charging monitoring device 54 and It is also used as a character CRT for making settings and for performing an operation for outputting the record data stored in the data storage device 72 to the printer 63. In the raw material charging monitoring device 54, when an abnormality of the raw material charging device is detected by the diagnostic data processing device 71, a warning is displayed on the graphic CRT 60 or an abnormality warning signal Arm is output to the turning chute rotation speed calculator 50. The warning lamp 64 is turned on or the warning buzzer 65 is activated so that the operator can easily recognize the occurrence of an abnormality in the raw material charging device. FIG. 3 is a configuration diagram of the diagnostic data processing device 71 in the raw material charging monitoring device 54 described above. In FIG. 3, the diagnostic data processing device 71 includes a raw material drop and raw material drop height diagnostic devices 80 and 90, and a turning time diagnostic device.
82 and 92, turning number diagnostic devices 84 and 94, turning direction diagnostic devices 86 and 96, dump height diagnostic devices 88 and 98, and diagnostic data external output 75. In this diagnostic data processing device 71, two diagnostic devices of the same type are arranged, and the reason why two diagnostic devices, that is, an E microwave sounding meter 26a and a W microwave sounding meter 26b, are used for substantially the same processing. 2
This is because the reliability of the abnormality diagnosis of the raw material charging device is improved by performing the duplication. The processing performed by each of these diagnostic devices is performed according to the abnormality diagnosis rule in each diagnostic device as described below. Further, the diagnostic data external output 75 is the diagnostic data processing device 71.
The output interface processing for outputting the data created by the abnormality diagnosis processing of the raw material charging apparatus in the inside is performed. The operation of this embodiment will be described below with reference to the drawings. FIG. 4 is a diagram showing the coordinates of the tip of the turning chute 24 and the position coordinates of the drop point of the raw material 1 falling from the turning chute 24. In this figure, the turning chute 24 has a length L, and the raw material 1 discharged at the output falling velocity v is charged into the blast furnace 10 in a state of a tilt angle α. Further, the shape of the upper surface of the raw material 1 in the blast furnace 10 is a mortar shape such that the furnace core side is lower than the furnace wall side, and the loading inclination angle of the raw material 1 at this time is θ. In this figure, A is the trajectory of the turning chute 24 turning in the blast furnace 10. At this time, the plane parallel to the plane on which the locus of the tip of the turning chute 24 is drawn is defined as the XY axis plane, and the X axis and the Y axis are defined. Further, the Z-axis is defined as a coordinate axis from the upper side to the lower side in the blast furnace 10. S is a stock line which is a reference plane for measuring the loading level of the raw material 1 in the blast furnace 10, P is a center point of the turning and tilting motions of the turning chute 24, and B is a raw material dropping point in the blast furnace 10. , C are souding measurement points on the upper surface of the loaded raw material in the blast furnace 10. The turning radius R ₁ of the turning chute 24 is the length of the turning chute 24, that is, the length L from the turning tilt center point P to the tip of the turning chute 24, and can be obtained from the tilt angle α of the turning chute 24 and the following equation. . R ₁ = L × sin α (1) Swiveling chute on the XY plane in FIG.
The coordinates (X ₁ , Y ₁ ) of the tip of 24 can be obtained by the following equation and the turning radius R ₁ of the turning chute 24 and the turning angle β of the turning chute 24. X ₁ = R ₁ × sin β = L × sin α × sin β (2) Y ₁ = R ₁ × cos β = L × sin α × cos β (3) Here, the tilt angle α of the turning chute 24 and the turning chute 24
The turning angle β of the raw material 1 while turning the turning chute 24
Is a time function that changes from moment to moment during charging of blast furnace 10. The coordinates of the tip of the turning chute 24 can be obtained by the equations (2) and (3) as described above.
When displaying or plotting on the CRT 60, the XY plotter 62, or the like, the turning and tilting center point P needs to be drawn at the center of the CRT screen or the printing paper, so that it is necessary to add the bias value. That is, if this bias value is taken as the length L of the turning chute 24, for example, the coordinates (X ₁ ′, X ₁ ′, of the tip of the turning chute 24 in the CRT display or plot).
Y ₁ ′) becomes as follows. X ₁ ′ = L × sin α × sin β + L (2a) Y ₁ ′ = L × sin α × cos β + L (3a) Next, the position coordinates of the falling point B of the raw material 1 falling from the turning chute 24 are as follows. Ask. Raw material 1 from the upper hopper 20 discharged to the turning chute 24
The discharge and falling velocity of V is v
The initial velocity of raw material 1 falling within 10 is v cos α. At this time, the time taken for the raw material 1 to drop from the tip of the turning chute 24 to reach the upper surface of the loading surface of the raw material 1 in the blast furnace 10 is t, the gravitational acceleration is g, and the loading inclination of the raw material 1 in the blast furnace 10 is The angle is θ, the distance between the turning tilt center point P and the stock line S in the Z-axis direction is l, the distance from the stock line S to the raw material dropping point B in the Z-axis direction is l ₁ , and the sounding measurement is performed. The distance in the Z-axis direction from the obtained stock line S to the upper surface of the loading surface of the raw material 1 in the blast furnace 10
Let l ₂ be the distance R ′ from the turning tilt center point P in the X-Y axis plane of the point C where the sounding measurement is performed, and the turning movement radius R ₀ of the falling point of the raw material 1 in the blast furnace 10 and the turning The distance Z _{0 in} the Z-axis direction from the tip of the chute 24 to the raw material dropping point B can be expressed by the following equation. _{R 0 = (v × cosα ×} sinα) × t + L × sinα ... (4) Z 0 = (v × cosα × cosα) × t + g × t 2/2 ... (5) Z 0 = l 1 + l-L cosα = l ₂ + seek _{(R'-R 0) × tanθ} + l-L cosα ... pivotal movement radius R ₀ Clears t with (6) or more (4) from equation (5) and the equation (6), By using this, the position coordinates (X ₂ , Y ₂ ) of the falling point B of the raw material 1 in the blast furnace 10
The length l ₂ (l ₀ or
(preliminarily obtained from l ₀ ′) and the loading inclination angle θ of the raw material 1 and the inclination angle α of the turning chute 24 can be obtained as follows. X ₂ = R ₀ × sin β (7) Y ₂ = R ₀ × cos β (8) As described above, the position coordinates of the falling point B of the raw material 1 (X ₂ , Y
₂ ) You can ask for a graphic CRT60 and X
In order to make the center point of the orbiting locus of the falling point B of the raw material 1 (the orbiting and tilting center point P) come to the center on the graphic CRT screen or the plotting paper in the case where it is graphically displayed or plotted on the Y plotter 62. Where the bias value is m, and the position coordinates (X ₂ ′, Y ₂ ′) of the dropping point B of the raw material 1 in the blast furnace 10 for displaying or plotting are expressed by the following equation. X ₂ ′ = R ₀ × sin β + m (7a) Y ₂ ′ = R ₀ × cos β + m (8a) As described above, the formula (2) and the formula (3), and the formula (7) and the formula (8) The coordinates of the tip of the chute 24 and the locus of this coordinate, the position coordinate of the falling point B of the raw material 1 in the blast furnace 10 and the locus of this coordinate can be easily grasped concretely. Also (2a)
By the equations and (3a) and the equations (7a) and (8a), the coordinates of the tip of the swirling chute 24 and the locus of these coordinates, the position coordinates of the falling point B of the raw material 1 in the blast furnace 10 and The coordinate locus can be easily displayed on the graphic CRT 60, the XY plotter 62, or the like. In addition, by performing this display and plotting in real time while the raw material is being carried into the blast furnace 10, the inside of the blast furnace 10 can be monitored as if the inside of the blast furnace 10 is directly viewed from above, which allows the blast furnace 10 to be monitored. Needless to say, it is possible to improve the stability of the operation and the operating rate of. FIG. 5 is a diagram showing a plot example of the position coordinates of the dropping point B of the raw material 1 falling from the turning chute 24 according to the above-mentioned embodiment. Next, the operation of the diagnostic data processing device 71 in the present embodiment, that is, the operation of the function of diagnosing an abnormal charging of the raw material into the blast furnace 10 in this embodiment will be described. FIG. 6 is a diagram showing signals detected from the two sounding meters in the above embodiment. In FIG. 6, the turning chute 24 is charging the raw material 1 while turning in the blast furnace 10 at a tilt angle α.
The E-microwave sounding meter 26a and the W-microwave sounding meter 26b are located at a position where the surface of the charge can be seen from above the blast furnace 10 and the swirling chute 24 itself by the swiveling of the swirling chute 24 or the raw material falling from the swirling chute 24. It is arranged at a position where passage of 1 can be detected. D is a turning movement locus of the raw material dropping point in the blast furnace 10. The E microwave sounding meter 26a and the W microwave sounding meter 26b are the turning trajectories D of the material dropping points of the same radius.
However, it is arranged on the opposite side of the turning movement locus D of the raw material dropping point centered on the turning tilt center point P,
That is, they are not arranged so that they are located exactly 180 ° on the opposite side. That is, when the turning chute 24 is turning in the reverse direction, the turning movement time t ₂ of the raw material dropping point from 26a to 26b and the turning movement time t ₃ of the raw material dropping point from 26b to 26a.
They are placed at positions where and are not equal. The deviations of the positions of the E microwave sounding meter 26a and the W microwave sounding meter 26b from the opposite sides of 180 ° are used by | t ₂ −t ₃ | to diagnose the raw material charging abnormality into the blast furnace described later. Detection above (Turning direction diagnostics 86 and 96
The amount of deviation is such that it can be easily detected by (abnormality diagnosis). The solid line F in FIG. 6 indicates the distance l ₀ to the raw material 1 according to the signal detected from the E microphone sounding meter 26a.
It is a waveform of a signal. The solid line G is the distance l ₀ ′ signal output from the level meter 26 to the raw material 1 according to the signal detected by the W microwave sounding meter 26b. h ₁ and h ₁ ′ are peak values of the distances l ₀ and l ₀ ′ from each sounding meter to the raw material 1 by detecting the passage of the dropping of the raw material 1 in the blast furnace 10, respectively. h ₂ and h ₂ ′ are respective peak values of the distances l ₀ and l ₀ ′ from each sounding meter to the raw material 1 due to the loading of the raw material in the blast furnace 10. h ₃ and h ₃ ′ are respective minimum values of l ₀ and l ₀ ′, which are distances from the respective sounding gauges to the raw material 1 when the raw material in the blast furnace 10 is unloaded. The raw material drop and raw material drop height diagnosing devices 80 and 90 diagnose the raw material charging abnormality by the following equation using the threshold value e. {(H ₁ −h ₂ ) −e ₁ } <f ₁ (θ) <{(h ₁ −h ₂ ) + e ₁ } ...
(9) {(h ₁ ′ −h ₂ ′) −e ₁ } <f ₁ (θ) <{(h ₁ ′ −h ₂ ) +
e ₁ } (9a) Here, f ₁ is a function of the parameter in the abnormality diagnosis, and the value of this function, that is, f ₁ (θ) is within the raw material drop and raw material drop height diagnostic devices 80 and 90. It is obtained in advance by the loading inclination angle θ of the raw material 1 from the above data table. In the turning time diagnostic devices 82 and 92, one rotation time t ₁ (= t ₂ + t ₃ ) of the turning movement of the dropping point of the raw material 1 in the blast furnace 10 detected by the E microwave sounding meter and the W microphone sounding meter, respectively. The raw material charging abnormality is diagnosed by the following equation using the threshold value e ₂ and the threshold value e ₂ . (T ₁ −e ₂ ) <(2π / ω) <(t ₁ + e ₂ ) ... (10) Note that this one rotation time is equal to the solid line F between the point J and the point K in FIG. Waveform of the signal at distance l ₀ ) to
It is the average of the pulse interval times. In the number-of-turns diagnostics 84 and 94, the E-wave sounding meter 26a and the W-microwave sounding meter 26b respectively turn the turning chute 24 to make a turning chute.
24 or the rotation speeds k and k'obtained by detecting the passage of the raw material 1 falling from the rotation chute 24 and the rotation speed n detected from the rotation angle β of the rotation chute 24.
The raw material charging abnormality is diagnosed by the following equations using and. k = n (11) k '= n (11a) The turning speeds k and k'are the points J and K in FIG.
Solid line F or G between the points (distance to raw material 1 signal ₀ or
The number of pulses in the l ₀ ′ signal waveform). In the turning direction diagnostic device 86, the E microwave sounding meter 26
After the passage of the swirl chute 24 itself or the passage of the raw material 1 falling from the swivel chute 24 is detected in a, until the passage of the raw material 1 falling from the swivel chute 24 itself or the swivel chute 24 is detected by the W microwave sounding meter 26b. By determining whether the time is t ₂ or t ₃ (t ₂ ≠ t ₃ , t ₁ = t ₂ + t ₃ ), the turning direction of the turning chute 24 is a forward turning (t ₃ ) or a reverse turning. (T ₂ ), and the raw material charging abnormality is diagnosed depending on whether or not this is the target rotation direction.
Further, the turning direction diagnostic device 96 is a W microwave sounding meter.
After the passage of the swirling chute 24 itself or the raw material 1 falling from the swirling chute 24 is detected by 26b, the swirling chute 24 itself or the swirling chute 24 is detected by the E microwave sounding meter 26a.
From the time when the passage of the raw material 1 falling from is detected is t ₂
Or t ₃ (t ₂ ≠ t ₃ , t ₁ = t ₂ + t ₃ ), the turning direction of the turning chute 24 is a forward turning (t ₂ ) or a reverse turning (t ₃ ). The raw material charging abnormality is diagnosed based on whether or not the turning direction matches the target turning direction. The dump height diagnostic devices 88 and 98 are the loading levels h ₂ and h ₃ of the raw material 1 in the blast furnace 10 obtained from the distance l ₀ from the E microwave sounding meter 26a to the raw material 1, or the W microwave sounding meter, respectively. Load level h ₂ ′ of raw material 1 in blast furnace 10 obtained from distance l ₀ ′ from 26b to raw material 1
And h ₃ ′ and the threshold value e ₃ are used to diagnose the raw material charging abnormality by the following equations. _{{(H 2 -h 3) -e} 3} <f 2 (θ, W) <{(h 2 -h 3) -e 3}
… (12) {(h ₂ ′ −h ₃ ′) −e ₃ } <f ₂ (θ, W) <{(h ₂ ′ −
h ₃ ′) −e ₃ } (12a) Here, the function f ₂ is the function of the parameter for abnormality diagnosis,
The value of this function, that is, f ₂ (θ, W) is the dump height diagnostic device 88.
And the data table inside 98, the loading inclination angle θ of raw material 1
And the raw material amount W per dump of the raw material 1 in advance. In this way, the raw material charging abnormality into the blast furnace can be diagnosed mainly by the processing performed by the diagnostic data processing device 71. For example, the raw material drop and raw material drop height diagnosing devices 80 and 90 can detect interruption of the raw material 1 charged from the turning chute 24 due to a failure of the flow control gate 22 or the like. In the turning time diagnostic devices 82 and 92, the induction motor 37 and the pulse generator 37 attached to the induction motor 37 are used.
When there is an abnormality in the turning angular velocity ω of the turning chute 24 due to a failure of a or the like, this abnormality can be detected. The turning number diagnostic devices 84 and 94 can detect an abnormality in the pulse generator 37a attached to the induction motor 37 and an abnormality in counting the number of turnings in the turning chute rotation speed calculator 50. In the turning direction diagnostic devices 86 and 96, the turning chute 24 is caused by an abnormality in the turning drive mechanism 39, the turning control device 35, or the like.
It is possible to detect that the turning direction of does not match the intended rotation direction. The dump height diagnostic devices 88 and 98 can detect an abnormality in the dump height of the raw material 1 in the blast furnace 10 due to a failure of the flow control gate 22 or an abnormality in the tilting movement of the swirling chute 24. By diagnosing the charging abnormality of the raw material 1 into the blast furnace 10, even if the abnormality of the raw material charging device into the blast furnace 10 is comparatively small, it is possible to quickly diagnose and detect the abnormality. It is possible to prevent the anomaly of the above from expanding and hindering the operation of the blast furnace 10. In addition, in the function of diagnosing abnormal charging of raw material into the blast furnace 10, a reflection type distance meter such as the E microwave sounding meter 26a and the W microwave sounding meter 26b is located at a position where the charging surface is seen from above the blast furnace 10. And, even if the tilt angle α of the turning chute 24 is any angle,
It is preferable to dispose the swirling chute 24 itself or a position where the passage of the raw material 1 falling from the swirling chute 24 due to the turning of the 24 can be detected. However, due to various mounting restrictions, for example, the tilt angle α of the turning chute 24 is
When there is no choice but to arrange such a reflection range finder at a position where the passage chute 24 itself or the passage of the raw material 1 falling from the rotation chute 24 cannot be detected at a certain angle or less, Within the range of the tilt angle α of the revolving chute 24, which can detect the passage of the raw material 1 falling from the revolving chute 24 itself or the revolving chute 24, the raw material loading to the blast furnace 10 using the reflex distance measuring device is performed. It suffices to perform a process for diagnosing an input abnormality. Further, this idea is included in the idea of the present invention.

【The invention's effect】

As described above, according to the present invention, when charging the raw material discharged from the hopper while moving the tip of the turning chute whose turning radius can be changed, the raw material charging to the blast furnace can be performed in real time. Effectively perform monitoring and collection of raw material charging operation results into this blast furnace by this monitoring, thereby improving product quality, improving stability and operation rate of blast furnace operation, and preventing various troubles in advance. At the same time, it has an excellent effect that many valuable data for improving the operation method of the blast furnace can be obtained.

[Brief description of drawings]

FIG. 1 is a block diagram of an apparatus for charging a raw material into a blast furnace in which the present invention is implemented, FIG. 2 is a block diagram of a raw material charging monitoring apparatus used in the embodiment, and FIG. FIG. 4 is a configuration diagram of a diagnostic data processing device used in the entrance monitoring device, FIG. 4 is a diagram showing the coordinates of the tip of the turning chute and the position coordinates of the drop point of the raw material falling from the turning chute, and FIG. FIG. 6 is a diagram showing a plot example of the position coordinates of the dropping points of the raw material falling from the turning chute according to the example, and FIG. 6 is a diagram showing the signals detected from the two sounding meters in the embodiment. 1 …… Raw material, 10 …… Blast furnace, 20 …… Upper hopper, 22 …… Flow control gate (FCG), 24 …… Swirl chute, 26 …… Level meter, 26a …… E Microwave sounding meter, 26b …… W microwave sounding meter, 30 ... Tilt control device, 31 ... Servo motor, 32 ... Tilt drive mechanism, 35 ... Turning control device, 37 ... Induction motor, 37a ... Pulse generator, 39 ... Turning Drive mechanism, 50 …… Swivel chute rotation speed calculator, 54 …… Raw material charging monitoring device, 60 …… Graphic CRT, 61 …… Keyboard, 62 …… XY plotter, 63 …… Print printer, 64 …… Warning lamp, 65 ... warning buzzer, 70 ... trajectory calculator, 71 ... diagnostic data processing device, 72 ... data storage device, L ... turning chute length, α ... turning chute tilt angle, β …… Turning angle of turning chute, ω …… Turning of turning chute Rotational angular velocity, l ₀ ... E distance from microwave sounding meter to raw material, l ₀ '... distance from microwave microwave sounding meter to raw material, S ... stock line, R' ... in X-Y axis plane From the center of swiveling and tilting to the sounding measurement point, R ₀ …… Swing movement radius of raw material drop point in blast furnace, R ₁ …… Swirl radius of swivel chute, Z ₀ …… From tip of swivel chute to raw material drop point In the Z-axis direction, n ... Swirl speed detected from the swivel angle of the swirl chute, v ... Discharge speed of the raw material to the swirl chute, θ ... Loading inclination angle of the raw material in the blast furnace, Arm ... Abnormal warning signal.

Claims (2)

[Claims] 1. When charging a raw material discharged from a hopper while moving the tip of a swirling chute whose swiveling radius can be varied, the tilt angle and swivel angle of the swirling chute, and the surface level of the blast furnace interior contents. And the coordinate of the tip of the turning chute is determined from the length of the turning chute and the tilt angle and the turning angle that are obtained in advance, and the coordinates of the tip of the turning chute, the tilt angle, and the interior of the blast furnace are entered. The position coordinates of the raw material dropping point in the blast furnace are obtained from the surface level of the material and the preset or required dropping speed at the time of discharging the raw material while considering the increase in the dropping speed of the raw material due to gravity. Monitoring method of raw material charging into blast furnace. 2. The turning radius of the raw material discharged from the hopper is changed.
Do not move the tip of the swing chute that can be changed.
At the time of charging the blast furnace at the position where the surface of the charge is seen from above the blast furnace,
The turning chute itself or the turning by the turning of the turning chute
Check the position where it can detect the passage of raw materials while dropping from the chute.
An emissive distance meter is installed, and the surface level of the blast furnace interior is measured by this reflective distance meter
And the turning of the turning chute by turning the turning chute.
The chute itself or the flow of raw materials falling from the turning chute
Of the blast furnace according to a predetermined abnormality diagnosis rule.
Measurement value of the surface level of the interior container and the turning chute itself
Or, from the detection of the passage of raw materials during falling, charging the raw materials into the blast furnace
Moni charging of raw material into blast furnace characterized by diagnosing abnormality
Tulling method.