CN115041642A - Converter tapping method - Google Patents
Converter tapping method Download PDFInfo
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- CN115041642A CN115041642A CN202210561222.5A CN202210561222A CN115041642A CN 115041642 A CN115041642 A CN 115041642A CN 202210561222 A CN202210561222 A CN 202210561222A CN 115041642 A CN115041642 A CN 115041642A
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- infrared thermometer
- molten steel
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- 238000010079 rubber tapping Methods 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims abstract description 42
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 92
- 239000010959 steel Substances 0.000 claims abstract description 92
- 238000005070 sampling Methods 0.000 claims description 13
- 238000010438 heat treatment Methods 0.000 claims description 9
- 238000001514 detection method Methods 0.000 claims description 3
- 241000375392 Tana Species 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 238000009628 steelmaking Methods 0.000 abstract description 3
- 238000009529 body temperature measurement Methods 0.000 description 13
- 238000009826 distribution Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D1/00—Treatment of fused masses in the ladle or the supply runners before casting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/12—Travelling ladles or similar containers; Cars for ladles
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/0044—Furnaces, ovens, kilns
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Radiation Pyrometers (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
The invention discloses a converter tapping method, and relates to the technical field of converter steelmaking. The method comprises the following steps of (1) driving a steel ladle to move by using a transport vehicle, and measuring the average temperature of a preset area of the inner wall of the steel ladle by using an infrared thermometer, wherein the preset area is an area between one third height and two thirds height of the steel ladle; carrying out temperature compensation on the molten steel in the converter according to the average temperature; and pouring the molten steel after temperature compensation into a ladle to realize tapping. Compared with the prior art, the method for tapping of the converter provided by the invention adopts the step of measuring the average temperature of the preset area of the inner wall of the steel ladle, wherein the preset area is the area between one third height and two thirds height of the steel ladle, so that the effective temperature of the inner wall of the steel ladle can be accurately measured, the accurate compensation of the temperature of molten steel is realized, the automation degree is high, the influence of human factors can be avoided, and the normal production is ensured.
Description
Technical Field
The invention relates to the technical field of converter steelmaking, in particular to a converter tapping method.
Background
At present, a steel ladle needs to be preheated before converter tapping, the effective temperature of the inner wall of the steel ladle directly influences the temperature drop of molten steel after tapping, and workers need to carry out temperature compensation on the molten steel according to the temperature of the steel ladle and then tap the steel. If the tapping temperature is too high, the oxygen content in steel is greatly increased, the alloy yield is reduced, and meanwhile, the slag splashing layer is corroded by the too high tapping temperature, so that the consumption of refractory materials of the converter is increased, and the furnace life is reduced; if the tapping temperature is too low, a water gap is easy to be blocked, the surface of a casting blank is easy to have defects of slag inclusion, cracks and the like, and even the production is interrupted. At present, the mode of measuring the temperature of the ladle is point-type detection by manually holding a temperature measuring gun, and observation and estimation are carried out according to experience, so that the temperature measuring mode is greatly influenced by human factors, the accuracy rate is low, the effective temperature of the inner wall of the ladle cannot be accurately measured, the temperature compensation amount is too large or too small, and the normal production is influenced.
In view of this, it is important to design a converter tapping method with high automation degree and accurate temperature measurement, especially in converter steelmaking.
Disclosure of Invention
The invention aims to provide a converter tapping method, which can accurately measure the effective temperature of the inner wall of a steel ladle so as to realize accurate compensation of the temperature of molten steel, has high automation degree, can avoid the influence of human factors and ensures normal production.
The invention is realized by adopting the following technical scheme.
A converter tapping method comprising: the method comprises the following steps of (1) driving a steel ladle to move by using a transport vehicle, and measuring the average temperature of a preset area of the inner wall of the steel ladle by using an infrared thermometer, wherein the preset area is an area between one third height and two thirds height of the steel ladle; carrying out temperature compensation on the molten steel in the converter according to the average temperature; and pouring the molten steel after temperature compensation into a ladle to realize tapping.
Optionally, the step of measuring an average temperature of a preset area of the inner wall of the ladle, wherein the preset area is an area between one third height and two thirds height of the ladle comprises: driving the ladle to move along the linear direction by using the transport vehicle; scanning and measuring the temperature of the inner wall of the ladle by using an infrared thermometer, wherein the infrared thermometer is positioned in the movement direction of the transport vehicle; and acquiring a plurality of sampling temperature values of the infrared thermometer in a preset area, and calculating to obtain an average temperature.
Optionally, the infrared thermometer is arranged obliquely above the transport vehicle and is arranged obliquely to the vertical direction, the transport vehicle moves along the horizontal direction, the ladle is placed on the transport vehicle, and the infrared thermometer is used for scanning and measuring the temperature of the inner wall of the ladle in the process that the transport vehicle moves towards the direction close to the infrared thermometer.
Optionally, the formula of the angle range of the infrared thermometer inclined with respect to the vertical direction is: 0< tan < 3D/2H; in the formula, a is the inclination angle of the infrared thermometer relative to the vertical direction, D is the diameter of the steel ladle, and H is the height of the steel ladle.
Optionally, the step of measuring an average temperature of a preset region of the inner wall of the ladle, wherein the preset region is a region between one third height and two thirds height of the ladle, further comprises: detecting a real-time position of the transport vehicle; when the transport vehicle moves to the first position, the infrared thermometer scans to the position of one third of the height of the ladle; when the transport vehicle moves to the second position, the infrared thermometer scans to a position with two-thirds height of the ladle.
Optionally, the real-time position of the transport vehicle is detected by using a laser range finder, the laser range finder is located in the moving direction of the transport vehicle, when the transport vehicle moves to the first position, a first distance is formed between the laser range finder and the transport vehicle, when the transport vehicle moves to the second position, a second distance is formed between the laser range finder and the transport vehicle, and the first distance is smaller than the second distance.
Optionally, the controller is adapted to continuously sample the infrared thermometer during the detection of movement of the transporter from the first position to the second position.
Optionally, in the step of obtaining a plurality of sampling temperature values of the infrared thermometer in a preset area and calculating an average temperature, continuous sampling is performed through a preset duration pulse to obtain a plurality of sampling temperature values, wherein the preset duration ranges from 0.2 second to 1 second.
Optionally, the step of compensating the temperature of the molten steel in the converter according to the average temperature includes: if the average temperature is greater than or equal to 1000 ℃, temperature compensation is not carried out on the molten steel; if the average temperature is greater than or equal to 900 ℃ and less than 1000 ℃, heating the molten steel to 5 ℃; if the average temperature is more than or equal to 800 ℃ and less than 900 ℃, heating the molten steel by 10 ℃; and if the average temperature is greater than or equal to 700 ℃ and less than 800 ℃, heating the molten steel to 20 ℃.
Optionally, the step of pouring the temperature-compensated molten steel into a ladle to achieve tapping includes: and controlling the ladle to move to the position below the converter and opening the converter so as to enable the molten steel to flow into the ladle.
The converter tapping method provided by the invention has the following beneficial effects:
the converter tapping method provided by the invention has the advantages that a transport vehicle is utilized to drive a steel ladle to move, and an infrared thermometer is utilized to measure the average temperature of a preset area of the inner wall of the steel ladle, wherein the preset area is an area between one third height and two thirds height of the steel ladle; carrying out temperature compensation on the molten steel in the converter according to the average temperature; and pouring the molten steel after temperature compensation into a ladle to realize tapping. Compared with the prior art, the method for tapping of the converter provided by the invention adopts the step of measuring the average temperature of the preset area of the inner wall of the steel ladle, wherein the preset area is the area between one third height and two thirds height of the steel ladle, so that the effective temperature of the inner wall of the steel ladle can be accurately measured, the accurate compensation of the temperature of molten steel is realized, the automation degree is high, the influence of human factors can be avoided, and the normal production is ensured.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic structural diagram of a converter tapping method in an application process according to an embodiment of the invention;
FIG. 2 is a schematic structural view of a converter tapping method provided by an embodiment of the present invention when a transport vehicle is moved to a first position during use;
FIG. 3 is a schematic structural view of a converter tapping method provided by an embodiment of the present invention when a transport carriage is moved to a second position during use;
FIG. 4 is a block diagram of the steps of a converter tapping method according to an embodiment of the present invention.
An icon: 100-steel ladle; 101-an opening; 110-a transport vehicle; 120-infrared thermometer; 130-laser rangefinder.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "inside", "outside", "upper", "lower", "horizontal", etc. indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings or orientations or positional relationships conventionally placed when the products of the present invention are used, and are only used for convenience of description and simplification of the description, but do not indicate or imply that the devices or elements referred to must have specific orientations, be constructed in specific orientations, and operate, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "connected," "mounted," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Some embodiments of the invention are described in detail below with reference to the accompanying drawings. Features in the embodiments described below may be combined with each other without conflict.
Referring to fig. 1, 2, 3 and 4 (the dotted lines in fig. 2 and 3 indicate the infrared irradiation direction), the embodiment of the invention provides a converter tapping method for realizing converter tapping. The device can accurately measure the effective temperature of the inner wall of the steel ladle 100 so as to realize accurate compensation of the temperature of molten steel, has high automation degree, can avoid the influence of human factors, and ensures normal production.
The converter tapping method comprises the following steps:
step S110: the ladle 100 is driven to move by the transport vehicle 110, and the average temperature of a preset area of the inner wall of the ladle 100 is measured by the infrared thermometer 120, wherein the preset area is an area between one third height and two thirds height of the ladle 100.
It should be noted that, after the preheating of the ladle 100 is completed, the temperature field distribution of the inner wall of the ladle 100 from the bottom to the top is gradually reduced, the temperature at the bottom of the ladle 100 is higher due to the existence of molten steel residue, and the temperature drop speed at the top of the ladle 100 is fast due to the fact that the opening 101 is formed in the top of the ladle 100 and is directly communicated with the outside, and the heat dissipation time is longer and the temperature is lower in the preheating process. Specifically, the difference between the temperature at the bottom of the steel ladle 100 and the temperature at the top of the steel ladle 100 exceeds 500 ℃, the temperature of any point position on the steel ladle 100 cannot accurately represent the effective temperature of the inner wall of the steel ladle 100, therefore, the region between one-third height and two-thirds height of the steel ladle 100 is selected as a preset region, the temperature field distribution of the preset region is detected, the obtained average temperature is closest to the actual temperature of the inner wall of the steel ladle 100, and the average temperature can accurately represent the effective temperature of the inner wall of the steel ladle 100.
Specifically, step S110 includes four steps, which are:
step S111: the ladle 100 is moved in a linear direction by the carrier vehicle 110.
Step S112: and scanning and measuring the temperature of the inner wall of the ladle 100 by using an infrared thermometer 120, wherein the infrared thermometer 120 is positioned in the moving direction of the transport vehicle 110.
It should be noted that, in step S111 and step S112, the infrared thermometer 120 is disposed obliquely above the transportation vehicle 110, and is disposed obliquely to the vertical direction, that is, the infrared thermometer 120 can emit infrared rays in a direction oblique to the vertical direction, so as to implement the infrared temperature measurement function. Specifically, transport vechicle 110 moves along the horizontal direction, and be close to infrared thermometer 120 gradually under, ladle 100 places on transport vechicle 110, infrared thermometer 120 is used for scanning the temperature measurement to ladle 100 inner wall at transport vechicle 110 towards the in-process that is close to infrared thermometer 120's direction motion, in order to realize the automatic temperature measurement to ladle 100 inner wall, so, degree of automation is high, can effectively avoid the human factor to influence, and infrared ray temperature measurement is accurate reliable, can further improve temperature measurement's accuracy.
Further, since the opening 101 is completely opened at the top of the ladle 100, when the transportation vehicle 110 drives the ladle 100 to move in a direction close to the infrared thermometer 120, the infrared rays emitted by the infrared thermometer 120 can penetrate through the opening 101 and enter the ladle 100, and the position of infrared irradiation temperature measurement can be changed along with the movement of the transportation vehicle 110, thereby realizing the temperature measurement function of different height positions of the inner wall of the ladle 100. In this embodiment, the transportation vehicle 110 drives the ladle 100 to be continuously close to the infrared thermometer 120, and the infrared rays emitted by the infrared thermometer 120 can realize the continuous scanning temperature measurement of the inner wall of the ladle 100 from bottom to top.
It is noted that the angle range of the infrared thermometer 120 inclined with respect to the vertical direction is expressed as: 0< tan < 3D/2H; where a is an angle at which the infrared thermometer 120 is inclined with respect to the vertical direction, D is a diameter of the ladle 100, and H is a height of the ladle 100. The angle range of the infrared thermometer 120 inclined with respect to the vertical direction can be calculated by the above formula, thereby facilitating installation of the infrared thermometer 120.
In this embodiment, tan ═ 3D/2H, in the process that the transportation vehicle 110 drives the ladle 100 to move in the direction close to the infrared thermometer 120, when the infrared rays emitted by the infrared thermometer 120 just can pass through the opening 101 of the ladle 100, the position where the infrared rays irradiate the inner wall of the ladle 100 is just the position of one third of the height of the ladle 100, and then the transportation vehicle 110 drives the ladle 100 to continue to be close to the infrared thermometer 120, and the position where the infrared rays irradiate the inner wall of the ladle 100 continuously moves upwards until the ladle 100 is removed. In this process, the infrared thermometer 120 can detect the temperature field distribution of the preset region to obtain the average temperature.
Step S113: detecting a real-time position of the transporter 110; when the transport vehicle 110 moves to the first position, the infrared thermometer 120 scans to a position one third of the height of the ladle 100; when the transport vehicle 110 moves to the second position, the infrared thermometer 120 scans to a position two-thirds of the height of the ladle 100.
In step S113, the position of the inner wall of the ladle 100 irradiated with the infrared rays emitted from the infrared thermometer 120 is determined by detecting the moving position of the transportation vehicle 110, so as to start the continuous sampling procedure. Specifically, the laser range finder 130 is used to detect the real-time position of the transport vehicle 110, and when the laser range finder 130 detects that the transport vehicle 110 moves to the first position, the laser range finder 130 sends a first control signal to the controller, so that the controller starts a continuous sampling program for the infrared thermometer 120; continuously sampling the infrared thermometer 120 by the controller while the laser range finder 130 detects that the transporter 110 moves from the first position to the second position; when the laser range finder 130 detects that the transport vehicle 110 leaves the second position, the laser range finder 130 sends a second control signal to the controller, so that the controller suspends the continuous sampling procedure for the infrared thermometer 120. Thus, the controller can acquire a plurality of sampling temperature values of the preset area of the inner wall of the steel ladle 100, so that the average temperature can be calculated subsequently.
In this embodiment, the laser range finder 130 is used to detect the real-time position of the transport vehicle 110, and the laser range finder 130 is located in the moving direction of the transport vehicle 110 and is disposed on one side of the transport vehicle 110 away from the infrared thermometer 120. When the transport vehicle 110 moves to the first position, a first distance a is formed between the laser range finder 130 and the transport vehicle 110, and when the transport vehicle 110 moves to the second position, a second distance B is formed between the laser range finder 130 and the transport vehicle 110, wherein the first distance is smaller than the second distance, that is, the transport vehicle 110 is continuously away from the laser range finder 130 in the process of moving from the first position to the second position. Specifically, the laser range finder 130 can judge the real-time position of the transport vehicle 110 according to the distance between the laser range finder 130 and the transport vehicle 110, and when the laser range finder 130 detects that the distance between the laser range finder 130 and the transport vehicle 110 is a first distance, the laser range finder 130 sends a first control signal to the controller; when the laser range finder 130 detects that the distance between the laser range finder 130 and the transport vehicle 110 is the second distance, the laser range finder 130 sends a second control signal to the controller.
However, the present invention is not limited to this, and in other embodiments, the real-time position of the transportation vehicle 110 may be detected by a position sensor, and the type of the device for detecting the real-time position of the transportation vehicle 110 is not particularly limited.
Step S114: a plurality of sampling temperature values of the infrared thermometer 120 in a preset area are obtained, and an average temperature is calculated.
It should be noted that, in step S114, the controller continuously samples the infrared thermometer 120 through a preset time duration pulse to obtain a plurality of sampled temperature values, where the preset time duration ranges from 0.2 second to 1 second. Specifically, the average temperature is obtained by adding up a plurality of sampling temperature values and dividing the sum by the number of the sampling temperature values, and the average temperature can accurately represent the effective temperature of the inner wall of the ladle 100.
In this embodiment, the preset time duration is 0.5 seconds, that is, the controller continuously samples the infrared thermometer 120 by using a 0.5 second pulse, but is not limited thereto, and in other embodiments, the preset time duration may be 0.2 seconds or 1 second, and the size of the preset time duration is not specifically limited.
Step S120: and carrying out temperature compensation on the molten steel in the converter according to the average temperature.
In step S120, if the average temperature is greater than or equal to 1000 degrees celsius, temperature compensation is not performed on the molten steel; if the average temperature is greater than or equal to 900 ℃ and less than 1000 ℃, heating the molten steel to 5 ℃; if the average temperature is more than or equal to 800 ℃ and less than 900 ℃, heating the molten steel by 10 ℃; and if the average temperature is greater than or equal to 700 ℃ and less than 800 ℃, heating the molten steel to 20 ℃. Specifically, the temperature of the molten steel is compensated according to the average temperature of the ladle 100 to ensure that the temperature compensation amount of the molten steel is accurate and reasonable, thereby ensuring normal production.
It is worth noting that in actual production, whether the temperature compensation amount of the molten steel is accurate and reasonable is generally judged through the superheat degree of the tundish, the standard range of the superheat degree of the tundish is 12-30 ℃, if the superheat degree of the tundish is too high, the product quality is affected, and if the superheat degree of the tundish is too low, the liquidity of the molten steel is deteriorated.
Furthermore, the method of compensating the temperature of the molten steel after the temperature is manually measured in the prior art is compared with the method of compensating the temperature of the molten steel after the temperature is automatically measured in the invention, and the obtained parameters are shown in the following table:
according to the table, in the experiment numbers 1 to 9 corresponding to the automatic temperature measurement mode, the superheat degree of the tundish is in the standard range, which shows that the effective temperature of the inner wall of the ladle 100 obtained by the automatic temperature measurement mode is accurate and reliable, and the temperature compensation amount of the molten steel is accurate and reasonable after the temperature compensation is performed on the molten steel. In experiment numbers 3, 7 and 9 corresponding to the manual temperature measurement mode, the superheat degree of the tundish is too high or too low, which indicates that the effective temperature of the inner wall of the ladle 100 obtained by the manual temperature measurement mode is inaccurate, and the temperature compensation amount of the molten steel is too large or too small after the temperature compensation is performed on the molten steel.
Step S130: and pouring the molten steel after temperature compensation into the ladle 100 to realize tapping.
In step S130, the ladle 100 is controlled to move to a position below the converter and the tapping operation is performed so that molten steel flows into the ladle 100. Specifically, the ladle 100 is first moved forward by the carrier vehicle 110 until the position of the ladle 100 corresponds to the position of the nozzle of the converter, and then the nozzle is opened to allow the molten steel to flow into the ladle 100 by gravity.
According to the converter tapping method provided by the embodiment of the invention, the transport vehicle 110 is used for driving the steel ladle 100 to move, and the infrared thermometer 120 is used for measuring the average temperature of the preset area of the inner wall of the steel ladle 100, wherein the preset area is the area between one third height and two thirds height of the steel ladle 100; carrying out temperature compensation on the molten steel in the converter according to the average temperature; and pouring the molten steel after temperature compensation into the ladle 100 to realize tapping. Compared with the prior art, the converter tapping method provided by the invention adopts the step of measuring the average temperature of the preset area of the inner wall of the steel ladle 100, wherein the preset area is the area between one third height and two thirds height of the steel ladle 100, so that the effective temperature of the inner wall of the steel ladle 100 can be accurately measured, the accurate compensation of the temperature of molten steel is realized, the automation degree is high, the influence of human factors can be avoided, and the normal production is ensured.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A converter tapping method is characterized by comprising the following steps:
driving a steel ladle (100) to move by using a transport vehicle (110), and measuring the average temperature of a preset area of the inner wall of the steel ladle (100) by using an infrared thermometer (120), wherein the preset area is an area between one third height and two thirds height of the steel ladle (100);
carrying out temperature compensation on the molten steel in the converter according to the average temperature;
and pouring the molten steel after temperature compensation into the ladle (100) to realize tapping.
2. The converter tapping method according to claim 1, wherein the step of moving the ladle (100) by using the transport vehicle (110) and measuring an average temperature of a predetermined region of the inner wall of the ladle (100) by using the infrared thermometer (120), wherein the predetermined region is a region between one-third and two-thirds of the height of the ladle (100), comprises:
driving the ladle (100) to move in a linear direction by using the transport vehicle (110);
scanning and measuring the temperature of the inner wall of the ladle (100) by using the infrared thermometer (120), wherein the infrared thermometer (120) is positioned in the moving direction of the transport vehicle (110);
and acquiring a plurality of sampling temperature values of the infrared thermometer (120) in the preset area, and calculating to obtain the average temperature.
3. The converter tapping method according to claim 2, wherein the infrared thermometer (120) is arranged obliquely above the carrier vehicle (110) and is arranged obliquely to the vertical direction, the carrier vehicle (110) moves in the horizontal direction, the ladle (100) is placed on the carrier vehicle (110), and the infrared thermometer (120) is used for scanning and measuring the temperature of the inner wall of the ladle (100) during the movement of the carrier vehicle (110) in the direction close to the infrared thermometer (120).
4. Converter tapping method according to claim 3, wherein the angular range over which the infrared thermometer (120) is inclined with respect to the vertical direction is given by the formula:
0<tana≤3D/2H；
wherein a is an angle at which the infrared thermometer (120) is inclined with respect to a vertical direction, D is a diameter of the ladle (100), and H is a height of the ladle (100).
5. The converter tapping method according to claim 2, wherein the step of moving the ladle (100) by using the transport vehicle (110) and measuring an average temperature of a preset area of the inner wall of the ladle (100) by using the infrared thermometer (120), wherein the preset area is an area between one-third height and two-thirds height of the ladle (100), further comprises:
detecting a real-time position of the transporter (110);
the infrared thermometer (120) scans to a position one third of the height of the ladle (100) when the transport vehicle (110) moves to a first position;
the infrared thermometer (120) scans to a position two-thirds of the height of the ladle (100) when the transport vehicle (110) moves to a second position.
6. Converter tapping method according to claim 5, characterized in that a real-time position of the transport carriage (110) is detected by means of a laser distance meter (130), the laser distance meter (130) being located in the direction of movement of the transport carriage (110), a first distance being formed between the laser distance meter (130) and the transport carriage (110) when the transport carriage (110) is moved to the first position, and a second distance being formed between the laser distance meter (130) and the transport carriage (110) when the transport carriage (110) is moved to the second position, the first distance being smaller than the second distance.
7. The converter tapping method according to claim 5, wherein the infrared thermometer (120) is continuously sampled by a controller during the detection of the movement of the carriage (110) from the first position to the second position.
8. The converter tapping method according to claim 2, wherein in the step of obtaining a plurality of sampled temperature values of the infrared thermometer (120) in the preset area and calculating the average temperature, continuous sampling is performed by using pulses of a preset duration to obtain the plurality of sampled temperature values, wherein the preset duration ranges from 0.2 seconds to 1 second.
9. The converter tapping method according to claim 1, wherein the step of temperature-compensating the molten steel in the converter according to the average temperature comprises:
if the average temperature is greater than or equal to 1000 ℃, temperature compensation is not performed on the molten steel;
if the average temperature is greater than or equal to 900 ℃ and less than 1000 ℃, heating the molten steel by 5 ℃;
if the average temperature is greater than or equal to 800 ℃ and less than 900 ℃, heating the molten steel by 10 ℃;
and if the average temperature is more than or equal to 700 ℃ and less than 800 ℃, heating the molten steel by 20 ℃.
10. The converter tapping method according to claim 1, wherein the step of pouring the molten steel after temperature compensation into the ladle (100) to achieve tapping comprises:
controlling the ladle (100) to move below the converter and opening the converter so that the molten steel flows into the ladle (100).
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