KR19990042422A - Detecting point of furnace and its method - Google Patents

Abstract

The present invention relates to an apparatus and a method for detecting a hollow point of a furnace, and in particular, a rotary drive unit 41 coupled to the upper surface of the base 11 fixed to the columnar bottom so as to be rotated by the motor 13. ; The pivotal arm 20 is coupled to the rotary shaft 12 so as to be movable, and is supported by the support plates 9-1 and 9-2 attached to upper and lower ends of the rotary shaft 12 to be rotated by the motor 16. A shanghai eastern portion (42) through which a screw shaft (19) is screwed through the swivel (20); The support shaft 24 is coupled to the side of the swivel arm 20 so as to be rotated by the motor 21, and the boom is moved forward and backward by the cylinder 27 to the boom 25 attached to the support shaft 24. An angle adjusting unit 43 into which the cylinder 26 is inserted; The outer casing 31 is fixed to the boom cylinder 26 by the support 28, and the inner casing 32 is built in the outer casing 31 to form a water jacket 32-1, and a radiation thermometer An inner tube 38 incorporating the 40 and the glass filter 36 is embedded to form the nitrogen purge passage 34 in the inner casing 32, and the nitrogen inducing hole 38- of the inner tube 38 is formed. 1) to the induction point detection apparatus of the furnace, characterized in that consisting of the temperature measuring unit 30 is coupled to the nitrogen induction plate (35).

In addition, the present invention comprises the steps of measuring the melting temperature of the tap-melt of the tap opening (3) in the temperature measuring unit 30 from 30 minutes after starting the tapping; Inputting the measured value measured by the temperature measuring part 30 to the melt side temperature indicator; According to the arithmetic program of the melt temperature measuring instrument, the average value of the measured value measured in 10 second units from 30 minutes after starting the departure to 10 seconds before the current time is Y, and the measured value 10 seconds before the current time is Y1 while Y1 − Calculating Y> Z when Y = Z; If the Z> 10 state is continuous six or more times, the start point alarm for notifying that the arrival time (T2 ~ T3) is reached.

Description

Detecting point of furnace and its method

The present invention relates to an apparatus and a method for detecting the emptying point of a blast furnace, in particular, to detect the phenomena in advance by using the temperature change of the discharged melt generated at the end of the operation during the discharge process of discharging the melt in the furnace during operation of the furnace. The present invention relates to a detection point detection apparatus and a method thereof.

As shown in Fig. 1, the hot air 4 introduced into the furnace through the tuyere 2 and the coke 5 in the furnace as the level of the melt decreases at the end of the discharge of the melt 6 and 7 in the furnace 1 as shown in FIG. Refers to a phenomenon in which the filling gas generated by the reaction with) is ejected together with the melt to the outlet port 3.

In the conventional unloading operation, the deodorization method discharges the molten iron (7) and the slag (6) through the opening work through the tap opening (3) with iron bars and bits, etc. There is a problem that the accuracy is significantly lowered because it is determined by the side.

In addition, the method for predicting the exit opening of Patent Application No. 95-36597 is based on the low wire level obtained by the electric controller (ECC), the drawing time, the air volume, the internal pressure, the basicity in the slag and Al ₂ as shown in FIG. It is a method of predicting the probability of catching by applying the weight of ₃ and the hit ratio to the data of O ₃ .

However, the conventional method of predicting breathing causes a significant time deviation from the actual breathing time, which makes it impossible to automatically control the closing time and closing time. Discharged and scattered at high speed will cause serious damage to the water cover.

In addition, the worker's safety accident and fire caused by the wire during the preparation work of the exit exit, environmental pollution due to a large amount of dust is generated.

The present invention provides an apparatus and method for detecting a point of departure of a blast furnace, which can detect the phenomena in advance by using the temperature change of the discharged melt generated at the end of the work in the process of discharging the melt in the furnace during operation of the furnace. Has its purpose.

1 is a cross-sectional view showing a furnace;

2 is a graph showing the discharge melt temperature change with time at the tip of the exit port;

Figure 3 is a flow chart showing a detection point detection method of a conventional furnace;

Figure 4 is a perspective view showing a detection point detection apparatus of the furnace according to the present invention,

5 is a half sectional view showing a temperature measuring unit in a detection point detection apparatus of a blast furnace according to the present invention;

6 is a cross-sectional view taken along line A-A of FIG. 4;

7 is a flowchart illustrating a method of detecting a notch point in the furnace according to the present invention.

<Description of Symbols for Main Parts of Drawings>

DESCRIPTION OF SYMBOLS 1: Blast furnace 3: Outlet opening 6: Slag layer 7: molten iron layer 20: Slewing rock 25: Boom 30: Temperature measuring part 40: Radiation thermometer 41: Rotation part 42: East part of Shanghai 43: Angle adjusting part

In order to achieve the above object, the present invention includes a rotary drive unit coupled to the rotating shaft is rotated by a motor on the upper surface of the base fixed to the columnar bottom; A shanghai-dong portion coupled to the pivot shaft so that the pivot rock is moved up and down, and the screw shaft rotated by the motor while being supported by a support plate attached to upper and lower ends of the pivot shaft; An angle adjusting unit coupled to a side of the pivotal arm such that a support shaft is rotated by a motor, and a boom cylinder inserted and retracted by a cylinder into a boom attached to the support shaft; The outer casing is fixed by the support to the boom cylinder, the inner casing is embedded in the outer casing to form a water jacket, and the inner tube containing the radiation thermometer and the glass filter is embedded to form the nitrogen purge passage in the inner casing. It provides a detection point detection apparatus of the furnace comprising a temperature measuring unit coupled to the nitrogen induction plate in the nitrogen induction hole of the inner tube.

In another aspect, the present invention comprises the steps of measuring the temperature of the starting melt in the tap opening in the temperature measuring unit 30 minutes after starting the tapping; Inputting the measured value measured by the temperature measuring unit to the melt side temperature indicator; According to the arithmetic program of the melt temperature measuring instrument, the average value of the measured value measured in 10 second units from 30 minutes after starting the departure to 10 seconds before the current time is Y, and the measured value 10 seconds before the current time is Y1 while Y1 − Calculating Y> Z when Y = Z; When the Z> 10 state is continuous for 6 or more times, the exit point alarm for notifying that the reach of the point of departure (T2 to T3) is provided.

The configuration of the present invention will be described with reference to the drawings.

Figure 4 is a perspective view showing a notch point detection apparatus of the furnace according to the invention, Figure 5 is a half sectional view showing a temperature measuring unit of the notch point detection apparatus of the furnace according to the present invention, Figure 6 is a cross-sectional view AA of FIG. 7 is a flowchart illustrating a method of detecting a notch point in the furnace according to the present invention.

The base body plate 11 is fixed to the columnar bottom and the central shaft 12 is installed on the base plate 11, the rotating body portion is installed so as to move the pivot arm 20 up and down horizontally from the center axis 12 Consists of.

At this time, the driven gear 15 is installed below the central shaft 11 to enable the pivotal arm 20 to be rotated 360 ° by the drive gear 14 of the central shaft pivoting motor 13. The screw shaft 19 is rotated by the driven gear 18 of the screw shaft 19 which moves the drive gear 14 and the turning arm 20 of the moving motor 13 up and down, and the turning arm 20 is moved upward. Or the rotation drive part which moves to the lower part is comprised.

In addition, one end of the shaft 24 is built in one end of the side of the swing arm 20 so as to be rotatable and supported, and a driven gear 23 is installed at the end of the support shaft 24 to be installed in the swing arm 20. The angle adjusting unit rotates 360 degrees by the angle adjusting motor 21 is configured.

On the other hand, the other end of the shaft 24 is fixed to the side end of the boom 25, the boom cylinder 26 which can be adjusted horizontally by the cylinder 27 fixedly installed therein is built-in, the boom cylinder 26 The length adjustment part with the support 28 in which the inclination angle was formed is provided in the side end part.

In addition, the outer casing 31 of the temperature measuring part 30 is fastened by a bolt to the flange formed at one end of the side surface of the support 28, and the water jacket 32-1 is disposed between the outer casing 31 and the inner casing 32. (Water Jacket) is formed.

At this time, the cooling water supply pipe 8-1 and the cooling water discharge pipe 8-2 coupled to the upper and lower sides of the outer casing 31 respectively supply or discharge the cooling water to the water jacket 32-1.

In addition, the nitrogen line 33 which sequentially passes through the outer casing 31 and the inner casing 32 supplies nitrogen to the nitrogen purge passage 34 formed between the inner casing 32 and the inner tube 38.

Here, the inner tube 38 embedded in the inner casing 32 has a radiation thermometer 40 embedded therein, and a cable 37-1 connected through the nitrogen line 33 is jack 37 (jack) on the radiation thermometer. Are connected by

At this time, the lens protection glass filter 36 of the radiation thermometer 40 is built in the front side of the inner tube 38.

On the other hand, six nitrogen guide holes 38-1 are formed in the circumferential direction at the front end side of the inner tube 38 in order to maintain the contamination prevention and precision of the glass filter 36, and the nitrogen guide holes 38-1. Nitrogen induction plates 35 of propeller blade type penetrate through each.

Here, nitrogen flowing to the front side along the nitrogen purge passage 34 flows into the nitrogen induction hole 38-1 along the nitrogen induction plate 35, and then again into the inner tube 38 through the nitrogen induction hole 38-1. Nitrogen flowing into the interior of the glass induction of the vortex in the front side of the glass filter 36 by the shape of the nitrogen induction pipe (35).

Therefore, the nitrogen generating the vortex effectively purges the entire surface of the yura filter 36.

On the other hand, when the measured value obtained by the melt continuous temperature measuring apparatus as described above is input to the meltable temperature probe (Progragmable Signal Processor),

The average value obtained by measuring the measured value from 10 minutes before the start time of 30 minutes to 10 seconds before the present time is Y.

If the measured value between present time and the previous 10 seconds is Y1,

In the case where Z is the value obtained by subtracting the Y value from the Y1 value,

When the value of Z is 10 or more, when Z> 10 is reached in 60 seconds, which is a set time more than 6 times in 10-second units, and reaches the point of nominal time (T2 to T3), opening of other openings and closing of openings are started. To be done.

Hereinafter, the operation of the present invention.

After 30 minutes (T1) has elapsed since the start of the tapping, the melt continuous temperature measuring apparatus is close to the taping opening (3).

At this time, the melt continuous temperature measuring device set on the upper side of the outlet port 3 is automatically or manually operated by wire or wireless, and is first rotated by the rotation of the driven gear 15 installed at the lower end of the central shaft 12. Up and down height adjustment is made by the screw shaft 19 which 20 rotates in the direction of the tap hole 3, and moves a swivel rock up and down.

On the other hand, the angle adjustment and the length adjustment for the precise measurement of the melt continuous temperature measuring apparatus entered into the top of the outlet opening (3) is made.

At this time, the nitrogen or inert gas purged inside the temperature measuring part 30 of the continuous melt temperature measurement device is configured to form an antioxidant film on the exhaust melt when cooling, maintaining the cleanliness of the glass filter and ejecting to the outside. It has the characteristics of minimizing time disturbance.

Then, when the melt continuous temperature measuring apparatus is set in the outlet port 3, a series of processes for detecting the outlet opening point are started.

That is, the continuous temperature measuring device continuously measures the temperature of the discharge melt at the tip of the exit port 3, and the measured value is transmitted to the melt programmable signal processor.

At this time, in the melt temperature measuring instrument (PSP), the measured temperature average value (Y) in units of 10 seconds from the measurement start time (T1) to 10 seconds before the present time is obtained, and the temperature average value (Y1) for all 10 seconds from the current time is obtained. If the value Z is obtained by subtracting the Y value from Y1, if the value of Z is greater than 10, an alarm (ALARM) is issued to notify the detection times (T2 to T3) of six consecutive times by the timer, that is, 60 seconds.

On the other hand, if the value of Z is greater than 10 but fails to maintain the continuous value for more than six consecutive times in 10-second units, recomputation is started from the beginning.

Such a detection detection point (T2 to T3) calculation method forms a rapid temperature rise point (T2 to T3) by increasing the discharge of the slag (6) in the upper layer adjacent to the core coke layer (5) discharged at the end of the departure, The temperature at this time is a sharp rise curve in the range of approximately 1600 ~ 1650 ℃, the vacancy occurs while maintaining the horizontally flat temperature at the closed point (T3 ~ T4).

On the other hand, when the exit end alarm is generated, the continuous melt temperature measuring device is automatically retracted, and another opening is opened and the exit is closed.

The outlet discharge melt continuous temperature measuring device is coupled to facilitate the rotation and angle adjustment, length adjustment is characterized in that it can be used in two outlets as one device when automatic control via wired and wireless.

The present invention detects the air phenomena generated during the tapping operation of the furnace by using a change in the discharge temperature of the melt discharged during the tapping operation in advance, and by using the value to open the other tap opening and closing the tap opening. It is possible to prevent environmental pollution by preventing delay and preventing dust spill.

Claims (2)

A rotation drive part 41 coupled to the upper surface of the base 11 fixed to the columnar bottom so that the rotation shaft 12 is rotated by the motor 13; The pivotal arm 20 is coupled to the rotary shaft 12 so as to be movable, and is supported by the support plates 9-1 and 9-2 attached to upper and lower ends of the rotary shaft 12 to be rotated by the motor 16. A shanghai eastern portion (42) through which a screw shaft (19) is screwed through the swivel (20); The support shaft 24 is coupled to the side of the swivel arm 20 so as to be rotated by the motor 21, and the boom is moved forward and backward by the cylinder 27 to the boom 25 attached to the support shaft 24. An angle adjusting unit 43 into which the cylinder 26 is inserted; The outer casing 31 is fixed to the boom cylinder 26 by the support 28, and the inner casing 32 is built in the outer casing 31 to form a water jacket 32-1, and a radiation thermometer An inner tube 38 incorporating the 40 and the glass filter 36 is embedded to form the nitrogen purge passage 34 in the inner casing 32, and the nitrogen inducing hole 38- of the inner tube 38 is formed. Deposition point detection apparatus of the furnace, characterized in that consisting of a temperature measuring unit 30 is coupled to the nitrogen induction plate 35 in 1). Measuring the melt temperature of the tap-off of the tap-out port 3 by the temperature measuring part 30 from 30 minutes after the tap-off start; Inputting the measured value measured by the temperature measuring part 30 to the melt side temperature indicator; According to the arithmetic program of the melt temperature measuring instrument, the average value of the measured value measured in 10 second units from 30 minutes after starting the departure to 10 seconds before the current time is Y, and the measured value 10 seconds before the current time is Y1 while Y1 − Calculating Y> Z when Y = Z; If the Z> 10 state is more than six times in a continuous eruption end alarm to indicate that reached the notch starting point (T2 ~ T3) comprises a step of ringing detection of the furnace.