TW201734213A - Method and apparatus for monitoring blast furnace smelting - Google Patents

Abstract

A monitoring method and a monitoring apparatus for blast furnace smelting are provided. The monitoring apparatus includes a temperature sensing module and a processing module. First, the temperature sensing module disposed on a cooling stave of a blast furnace to continuous monitoring the cooling stave and thereby obtaining temperature information of the cooling stave at various times. Then, the processing module determines whether the cooling stave is about to break based on the temperature information.

Description

Monitoring method and monitoring device for blast furnace smelting

The invention relates to a monitoring method and a monitoring device, and in particular to a monitoring method and a monitoring device for blast furnace smelting.

In the production process of steel products, the steel blast furnace, the converter and the continuous casting process are firstly formed to form a steel slab, and then the steel slab is subjected to, for example, hot rolling or pickling treatment to form a corresponding steel product. However, the blast furnace stave will accumulate wear as the use time and the number of uses increase, and when the wear accumulates to a certain extent, the blast furnace stave will rupture, so that the water used to cool the blast furnace penetrates into the blast furnace from the rupture. This has led to a serious impact on blast furnace operation and subsequent production.

In order to avoid blast furnace stave rupture and affect production, the residual thickness of the blast furnace stave can be monitored to give an early warning notice before the blast furnace stave is about to rupture. The method for monitoring the residual thickness of the blast furnace stave is to drill holes in a measuring point of the blast furnace stave and install a smokable copper rod on the borehole. However, this method cannot continuously monitor the blast furnace stave and the copper rod is After a long period of operation, it is easily deformed by heat, which makes it impossible to smoothly withdraw from the blast furnace stave, which makes it impossible to use the measuring point to connect the residual thickness of the blast furnace stave. Continued monitoring. Alternatively, the residual thickness of the blast furnace stave can be measured by ultrasonic thickness measurement. However, changes in the hot surface condition and temperature of the blast furnace stave will affect the accuracy of the measurement. As can be seen from the above, the installation of a smokable copper rod and the use of an ultrasonic thickness gauge are not conducive to the use of an early warning of rupture of the blast furnace stave.

The object of the present invention is to provide a monitoring method and a monitoring device for blast furnace smelting, which can continuously monitor the blast furnace stave, and can accurately determine whether the blast furnace stave is about to be broken, and issue it before discriminating that the blast furnace stave is about to rupture. Alert instructions to promptly alert field operators to take appropriate measures to increase production quality and efficiency.

According to the above object of the present invention, a monitoring method for blast furnace smelting is provided, which comprises: continuously monitoring a blast furnace stave through a temperature sensing module disposed on a blast furnace stave to obtain a plurality of blast furnace stave The temperature information at each time point; and the temperature information to determine whether the blast furnace stave is about to rupture.

According to an embodiment of the invention, the monitoring method further comprises: obtaining temperature information of the plurality of cracked blast furnace stave walls and the plurality of unruptured blast furnace stave walls; and according to the cracked blast furnace stave and the unbroken blast furnace stave The temperature information is used to set at least one regulatory value for determining whether the blast furnace stave is about to rupture.

According to still another embodiment of the present invention, the monitoring method further comprises: calculating temperature information of the blast furnace stave to obtain an accumulated value of excessive temperature change times; and comparing the super-high temperature change times and the control value of the alarm control The value; and if the cumulative value of the excessive temperature change exceeds the warning value, the blast furnace stave is set to enter the alert phase.

According to still another embodiment of the present invention, the monitoring method further comprises: calculating the temperature information of the blast furnace stave after entering the alert phase to obtain an excessive temperature change frequency value; and comparing the excessive temperature change frequency value with the control value alarm The control value; and if the excessive temperature change frequency value exceeds the alarm control value, it is determined that the blast furnace stave is about to rupture.

According to still another embodiment of the present invention, the monitoring method further comprises: if it is determined that the blast furnace stave is about to rupture, an alarm indication is issued.

According to the above object of the present invention, a monitoring device for blast furnace smelting is proposed, which comprises a temperature sensing group and a processing module. The temperature sensing module is disposed on the blast furnace stave, and is used for continuously monitoring the blast furnace stave to obtain temperature information of the blast furnace stave at various time points. The processing module is configured to determine whether the blast furnace stave is about to rupture based on the temperature information.

According to an embodiment of the invention, the processing module is further configured to set at least one control value according to temperature information of the plurality of cracked blast furnace stave walls and the plurality of unruptured blast furnace stave walls, and according to the temperature information and control of the blast furnace stave The value is used to determine if the blast furnace stave is about to break.

According to still another embodiment of the present invention, the processing module is further configured to calculate the temperature information of the blast furnace stave to obtain an accumulated value of the excessive temperature change number, and compare the cumulative value of the excessive temperature change number with the guard value of the control value. If the cumulative value of the excessive temperature change times exceeds the warning control value, the processing module sets the blast furnace stave to enter the alert phase.

According to still another embodiment of the present invention, the processing module is further configured to calculate the temperature information of the blast furnace stave after the blast furnace stave enters the warning phase to obtain an excessive temperature change frequency value, and compare the excessive temperature change frequency value and the control. The value of the alarm control value. If the excessive temperature change frequency value exceeds the alarm control value, the processing module determines that the blast furnace stave is about to rupture.

According to still another embodiment of the present invention, the monitoring device further includes an alarm module for issuing an alarm indication when the processing module determines that the blast furnace stave is about to rupture.

100‧‧‧Monitor

110‧‧‧Temperature Sensing Module

120‧‧‧Processing module

130‧‧‧Database

140‧‧‧Alarm module

202, 204, 206, 208, 302, 304, 306, 308, 310, 402, 404, 406, 408, 410, 412, 414, 416, 418, 420, 422, 424, 426 ‧ ‧ steps

300‧‧‧Control value setting method

400‧‧‧Monitoring methods

For a more complete understanding of the embodiments and the advantages thereof, the following description is made with reference to the accompanying drawings, wherein: FIG. 1 is a schematic diagram of a monitoring device according to an embodiment of the present invention; [FIG. 2] is [FIG. 1] The main working flow chart of the monitoring device for continuously monitoring the blast furnace stave; FIG. 3 is a flow chart of a method for setting a control value according to an embodiment of the present invention; FIG. 4 is a monitoring according to an embodiment of the present invention. A flow chart of the method; [Fig. 5A] shows the relationship between the cumulative value of the number of times of excessive temperature change and time; and [Fig. 5B] shows the relationship between the frequency value of the excessively high temperature change and time.

Embodiments of the invention are discussed in detail below. However, it will be appreciated that the embodiments provide many applicable concepts that can be implemented in a variety of ways. In the specific content. The examples discussed and disclosed are illustrative only and are not intended to limit the scope of the invention.

Please refer to FIG. 1. FIG. 1 is a schematic diagram of a monitoring apparatus 100 according to an embodiment of the present invention. The monitoring device 100 is used for monitoring blast furnace smelting, and includes a temperature sensing module 110, a processing module 120, a database 130, and an alarm module 140. The temperature sensing module 110 is disposed on the blast furnace stave for continuously monitoring the blast furnace stave to obtain temperature information of the blast furnace stave. The resulting temperature information can be stored in the repository 130. The processing module 120 determines whether the blast furnace stave is about to rupture based on the temperature information. If the processing module 120 determines that the blast furnace stave is about to rupture, the processing module 120 instructs the alarm module 140 to issue an alarm indication to remind the operator at the site to take corresponding measures.

Please refer to FIG. 2. FIG. 2 is a main working flow chart of the method for continuously monitoring the blast furnace stave by the monitoring device 100 shown in FIG. In step 202, the temperature information of the blast furnace stave is obtained through the temperature sensing module 110 disposed on the blast furnace stave. In step 204, the temperature information sensed by the temperature sensing module 110 is stored in the database 130. In step 206, the regulatory value is set based on the temperature information. Regulatory values include alert control values and alert control values, and settings regarding these regulatory values are described in subsequent paragraphs. In step 208, the blast furnace stave is continuously monitored to determine if the blast furnace stave is about to rupture, and an alarm indication is issued upon determining that the blast furnace stave is about to rupture.

Please refer to FIG. 3. FIG. 3 is a flowchart of a control value setting method 300 according to an embodiment of the present invention. The control value setting method 300 is shown in FIG. The processing module 120 performs and includes the following steps. In step 302, temperature information of a plurality of cracked blast furnace stave walls and a plurality of unbroken blast furnace stave walls are obtained from the database 130. In step 304, a plurality of cumulative values of excessive temperature change times are obtained based on the temperature information of the blast furnace stave cooling walls. In detail, the processing module 120 first segments the temperature information of the blast furnace stave walls according to time, and then converts the segmented time information into a statistical value (which represents the degree of temperature change), and determines the statistic value. Whether it meets a critical condition. If the critical condition is met, it is determined that the degree of temperature change is too large, and the cumulative value of the excessive temperature change times is updated to the database 130. For example, if the statistical value is greater than a threshold, the cumulative value of the excessive temperature change is increased. Then, the processing module 120 finds the cumulative value of the maximum number of excessively high temperature changes between the time of each rupture blast furnace stave before a rupture (e.g., 90 days before rupture) to the time of rupture. In step 306, the minimum value of the accumulated values of the maximum excessive temperature change times is set as the alert control value.

In step 308, the processing module 120 obtains a plurality of maximum excessively high temperature change frequency values based on the temperature information of the unbroken blast furnace stave before the warning phase is entered. In detail, the processing module 120 first converts the segmented time information into a statistical value (which represents the temperature change amount and the temperature change number), and determines whether the statistical value meets a critical condition. If the critical condition is met, the degree of temperature change is determined to be too frequent, and the excessively high temperature change frequency values are updated to the database 130. For example, if the statistical value is greater than a threshold, the frequency value of the excessive temperature change is increased. Then, the processing module 120 finds the maximum excessive temperature change frequency value of each unbroken blast furnace stave after the time point described in step 304. In step 310, the processing module 120 Set the minimum value of these maximum over-temperature change frequency values to the alarm control value.

Please refer to FIG. 4. FIG. 4 is a flowchart of a monitoring method 400 according to an embodiment of the present invention. The monitoring method 400 is suitable for blast furnace smelting and is performed by the processing module 120 shown in FIG. The monitoring method 400 includes the following steps. In step 402, the blast furnace stave is set to be in a general stage. In step 404, a plurality of temperature information of the blast furnace stave in a period of time is obtained from the temperature sensing module 110. In step 406, it is determined whether the blast furnace stave is in an alert phase. If yes, proceed to step 418; if no, proceed to step 408.

In step 408, a first evaluation value is calculated based on the temperature information, the first evaluation value representing a degree of temperature change. In step 410, it is determined whether the first evaluation value is available for updating the high temperature change number cumulative value. If yes, proceed to step 412; if no, proceed to step 404.

In step 412, the excessive temperature change number cumulative value is updated according to the first evaluation value, and the updated excessive temperature change number cumulative value is recorded in the database 130. For example, if the first evaluation value is greater than a threshold value, the cumulative value of the excessive temperature change number is increased. In step 414, it is determined whether the cumulative value of the excessively high temperature change number reaches the alert control value. If yes, proceed to step 416; if no, proceed to step 404. In step 416, the blast furnace stave is set to enter the alert phase. In some embodiments, the processing module 120 can issue a warning when the blast furnace stave enters the alert phase to alert the operator at the site to adjust the operation of the blast furnace immediately.

In step 418, a second evaluation value is calculated based on the temperature information, the second evaluation value representing the amount of temperature change and the number of temperature changes. In the steps In 420, it is determined whether the second evaluation value is available for updating the high temperature change frequency value. If yes, proceed to step 422; if no, proceed to step 404.

In step 422, the excessive temperature change frequency value is updated according to the second evaluation value, and the updated excessive temperature change frequency value is recorded in the database 130. For example, if the second evaluation value is greater than a threshold value, the excessive temperature change frequency value is increased. In step 424, it is determined whether the excessively high temperature change frequency value reaches the alert control value. If yes, proceed to step 426; if no, proceed to step 404. In step 426, the alert module 140 is instructed to issue an alert indication.

It should be noted that the above embodiment can also be implemented as a computer program product and stored in a computer readable recording medium. After the computer is loaded into the computer program product and executed, the control value setting method and monitoring of the present invention can be completed. method. The computer readable recording medium can be a read only memory, a flash memory, a floppy disk, a hard disk, a compact disk, a flash drive, a magnetic tape, a database accessible by the network, or can be easily thought by those skilled in the art. And a computer with the same function can read the recording medium.

5A and 5B respectively show the relationship between the cumulative value of the excessive temperature change number and the excessive temperature change frequency value and time. As shown in FIG. 5A, the accumulated value of the excessive temperature change times exceeds the warning control value on the day t1, and at this time, the blast furnace stave is set to enter the alert phase. As shown in Fig. 5B, the excessive temperature change frequency value exceeds the alarm regulation value on the t2th day, and an alarm is issued at this time, indicating that the blast furnace stave is about to rupture. Finally, the blast furnace stave was ruptured on day t3. Time t2 and t3 are not long, representing the hair The monitoring method can discriminate that the blast furnace stave is about to rupture before the blast furnace stave breaks.

In summary, the monitoring method and the monitoring device of the invention can continuously monitor the blast furnace stave and accurately determine whether the blast furnace stave is about to rupture, and issue an alert indication before the blast furnace stave is about to rupture, so that the field operator can timely Take corresponding measures to increase production quality and efficiency.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and any one of ordinary skill in the art can make some changes and refinements without departing from the spirit and scope of the present invention. The scope of the invention is defined by the scope of the appended claims.

100‧‧‧Monitor

110‧‧‧Temperature Sensing Module

120‧‧‧Processing module

130‧‧‧Database

140‧‧‧Alarm module

Claims (10)

A monitoring method for blast furnace smelting comprises: continuously monitoring a blast furnace stave through a temperature sensing module disposed on a blast furnace stave to obtain a plurality of temperatures of the blast furnace stave at various time points Information; and by using the temperature information to determine whether the blast furnace stave is about to rupture. The monitoring method of claim 1, further comprising: obtaining temperature information of a plurality of cracked blast furnace stave walls and a plurality of unbroken blast furnace stave walls; and cooling the blast furnace staves and the unbroken blast furnaces according to the blast furnaces The temperature information of the wall is used to set at least one control value for determining whether the blast furnace stave is about to rupture. The monitoring method described in claim 2, further comprising: calculating temperature information of the blast furnace stave to obtain an accumulated value of an excessive temperature change; comparing the cumulative value of the excessive temperature change with the at least one control One of the value of the alert value; and if the cumulative value of the excessive temperature change exceeds the alert value, the blast furnace stave is set to enter a warning phase. For example, the monitoring method described in claim 3 includes: after entering the warning phase, calculating temperature information of the blast furnace stave to obtain an excessive temperature change frequency value; comparing the excessive temperature change frequency value And an alarm control value that is one of the at least one control value; and if the excessive temperature change frequency value exceeds the alarm control value, it is determined that the blast furnace stave is about to rupture. The monitoring method described in claim 1 further comprises: if it is determined that the blast furnace stave is about to rupture, an alarm indication is issued. A monitoring device for blast furnace smelting, comprising: a temperature sensing module disposed on a blast furnace stave, wherein the temperature sensing module is used for continuously monitoring the blast furnace stave to obtain the blast furnace stave A plurality of temperature information at each time point; and a processing module for determining whether the blast furnace stave is about to rupture based on the temperature information. The monitoring device of claim 6, wherein the processing module is further configured to set at least one control value according to temperature information of the plurality of cracked blast furnace stave walls and the plurality of unbroken blast furnace stave walls, and according to the blast furnace The temperature information of the stave and the at least one regulatory value determine whether the blast furnace stave is about to rupture. The monitoring device of claim 7, wherein the processing module is further configured to calculate temperature information of the blast furnace stave to obtain an accumulated value of an excessive temperature change, and compare the cumulative value of the excessive temperature change And an alert value of the at least one control value; if the accumulated value of the excessive temperature change number exceeds the alert control value, the processing module sets the blast furnace stave to enter an alert phase. The monitoring device of claim 8, wherein the processing module is further configured to calculate a temperature value of the blast furnace stave after the blast furnace stave enters the warning phase to obtain an excessive temperature change frequency value, and Comparing the excessive temperature change frequency value with one of the at least one control value alarm control value; if the excessive temperature change frequency value exceeds the alarm control value, the processing module determines that the blast furnace stave is about to rupture. The monitoring device of claim 6, further comprising: an alarm module for issuing an alarm indication when the processing module determines that the blast furnace stave is about to rupture.