Steel tapping control method, terminal device and storage medium for overcoming converter mouth overflow

Abstract

The present invention relates to a steel tapping control method, a terminal device and a storage medium for overcoming the overflow at the converter mouth. The method includes: dividing the steel tapping process of the converter into three stages; constructing and clearing a counter; collecting the converter mouth image in real time through a camera device, and judging whether the converter mouth overflows based on the mouth image; when the converter mouth overflows, increment the counter by 1, and calculate the time difference corresponding to the current converter mouth overflow; split the time difference into two parts, and allocate them to the tapping angles of the second and third stages of the converter respectively; add the preset residence time of each tapping angle to the time difference allocation result, replace the preset residence time of each tapping angle with the added result, and control the subsequent steel tapping process of the current heat according to the replaced preset residence time. The present invention can automatically increase the allocation of the residence time of each subsequent steel tapping step in real time when the converter mouth overflow disturbs the steel tapping process, so as to eliminate the phenomenon of converter mouth overflow occurring again during the steel tapping process.

Description

Technical Field

[0001] The present invention relates to the field of steel smelting, and particularly to a tapping control method, a terminal device and a storage medium for overcoming the overflow at the converter mouth. Background Art

[0002] In the traditional converter automatic tapping method, the time allocation for each tapping step is carried out according to the pre-configuration of the tapping time allocation table. When the overflow phenomenon occurs at the converter mouth during a certain tapping step, it usually means that the residence time allocated to each tapping step by the tapping time allocation table is too short. If the tapping time allocation table is not adjusted overall, and the subsequent tapping steps continue to execute according to the residence time allocated to each tapping step by the tapping time allocation table, the overflow phenomenon at the converter mouth will continue to occur. If only the residence time of the current tapping step is simply extended, lacking the function of automatically allocating and adjusting the calculation of the residence time of each real-time tapping step, it will lead to a relatively high failure rate of automatic tapping. Summary of the Invention

[0003] In order to solve the above problems, the present invention provides a tapping control method, a terminal device and a storage medium for overcoming the overflow at the converter mouth.

[0004] The specific solutions are as follows:

[0005] A tapping control method for overcoming the overflow at the converter mouth, comprising the following steps:

[0006] Step 1: Divide the converter tapping process into three stages. The first stage is from the start of tapping to the position between the molten steel in the converter and the converter mouth. The second stage is from the position between the molten steel in the converter and the converter mouth to the first arrival at the edge of the converter mouth. The third stage is from the first arrival at the edge of the converter mouth to the end of tapping;

[0007] Step 2: Construct a counter for recording the number of times of overflow at the converter mouth for each heat. The counter is initially set to 0 at the start of tapping;

[0008] Step 3: Real-time collect the converter mouth image through a camera device, and judge whether the overflow at the converter mouth occurs based on the converter mouth image;

[0009] Step 4: When the overflow at the converter mouth occurs, increment the counter by 1, and calculate the time difference T corresponding to the current overflow at the converter mouth: T = x * b, where x represents the value of the counter and b represents the time constant;

[0010] Step 5: Split the time difference into two parts, one part is allocated to the tapping angle in the second stage of the converter, and the other part is allocated to the tapping angle in the third stage of the converter;

[0011] Step 6: Add the preset residence time of each tapping angle in the second and third stages of the converter to the time difference allocation result, replace the preset residence time of each tapping angle of the converter with the added result, control the subsequent tapping process of the current heat according to the replaced preset residence time, return to Step 3, and continue until the tapping is completed. Then reset the counter to 0.

[0012] Further, the tapping start is determined by an automatic tapping start signal, and the tapping end is determined by the arrival time of the earlier signal among the signal that the slag damper slide has been closed returned by the slide gate slag blocking system or the signal that the converter starts to return to the zero-tilt angle.

[0013] Further, the time constant value in Step 4 is set to 100 seconds.

[0014] Further, in Step 5, a relatively larger time difference is allocated to the tapping angle in the third stage of the converter compared to the tapping angle in the second stage.

[0015] Further, the time difference is allocated according to the proportion of the preset residence time during the allocation of different tapping angles in each stage of the converter.

[0016] Further, the interval between adjacent tapping angles in each stage of the converter is set to 1.5 degrees.

[0017] Further, in Step 4, when the furnace mouth overflow is detected, the converter is tilted upward by 0 to 2 degrees at the current tapping angle.

[0018] Further, in Step 4, when the furnace mouth overflow is detected, the residence time corresponding to the current tapping angle of the converter is increased by 10 to 20 seconds.

[0019] A tapping control terminal device for overcoming furnace mouth overflow includes a processor, a memory, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the steps of the above method of the present invention are implemented.

[0020] A computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the above method of the present invention are implemented.

[0021] Adopting the above technical solution, the present invention can, when the furnace mouth overflow disturbs the tapping process, immediately perform post-automatic increment allocation on the residence time of each subsequent tapping step to eliminate the phenomenon of furnace mouth overflow occurring again during the tapping process, enhancing the adaptability and safety of the real-time control of the automatic tapping process. Brief Description of the Drawings

[0022] Figure 1 The flowchart of Embodiment 1 of the present invention is shown. Detailed Embodiments

[0023] To further illustrate each embodiment, the present invention provides accompanying drawings. These drawings are part of the disclosure of the present invention, mainly used to illustrate the embodiments, and can be combined with the relevant descriptions in the specification to explain the operating principle of the embodiments. With reference to these contents, those of ordinary skill in the art should be able to understand other possible implementation manners and the advantages of the present invention.

[0024] The present invention will be further described below in conjunction with the accompanying drawings and specific implementation manners.

[0025] Embodiment 1:

[0026] The embodiment of the present invention provides a tapping control method for overcoming the overflow at the converter mouth, as Figure 1 shown, the method includes the following steps:

[0027] Step 1: Divide the tapping process of the converter into three stages. The first stage is from the start of tapping to the position between the molten steel in the converter and the converter mouth. The second stage is from the position between the molten steel in the converter and the converter mouth to the first arrival at the edge of the converter mouth. The third stage is from the first arrival at the edge of the converter mouth to the end of tapping.

[0028] The start of tapping can be determined by an automatic tapping start signal, and the end of tapping can be determined by the arrival time of the earlier signal among the signal that the slag blocking slide has been closed returned by the slide slag blocking system or the signal that the converter starts to return to the zero-tilt angle.

[0029] Since the converter cannot reach in one rotation during a stage, each stage needs to be divided into multiple tapping steps and reached through multiple rotations.

[0030] Step 2: Construct a counter for recording the number of times of overflow at the converter mouth for each heat. The counter is initially set to 0 at the start of tapping.

[0031] Step 3: Real-time collect the image of the converter mouth through a camera device (such as a camera), and judge whether there is an overflow at the converter mouth based on the image of the converter mouth.

[0032] Step 4: When an overflow at the converter mouth occurs, increment the counter by 1, and calculate the time difference T corresponding to the current overflow at the converter mouth: T = x * b, where x represents the value of the counter (i.e., the number of times of overflow at the converter mouth in the current heat), and b represents the time constant, which can be set to 100 seconds in this embodiment.

[0033] For example, when the first overflow at the converter mouth occurs at the 10th tapping step, the counter is 1, and when the overflow at the converter mouth occurs again at the 12th tapping step, the counter is 2.

[0034] Step 5: Split the time difference into two parts, allocate one part to the tapping angle in the second stage of the converter and the other part to the tapping angle in the third stage of the converter.

[0035] Considering that the tapping angles in the first stage of the converter are all relatively safe tapping angles, no time difference is allocated; the tapping angle in the second stage of the converter is relatively safer compared to the tapping angle in the third stage, and the tapping angle in the third stage is the key controlled tapping angle. Therefore, in this embodiment, a relatively large time difference is allocated to the tapping angle in the third stage. For example, 60% of the time difference is allocated to the tapping angle in the third stage, and 40% of the time difference is allocated to the tapping angle in the second stage.

[0036] Furthermore, for more precise control, since the preset residence times of different tapping angles in each stage of the converter may be different, if the time difference is evenly distributed among different tapping angles in each stage, it may cause adverse effects. Therefore, in this embodiment, it is set that the time difference is distributed according to the proportion of the preset residence time in the allocation of different tapping angles in each stage.

[0037] Step 6: Add the preset residence time of each tapping angle in the second and third stages of the converter to the time difference allocation result, replace the preset residence time of each tapping angle with the added result, and control the subsequent tapping process of the current heat according to the replaced preset residence time. Return to Step 3 until the tapping is completed, and reset the counter to 0.

[0038] Furthermore, since the ladle overflow is a process from a non-overflow tapping step to an overflow tapping step, rather than a sudden process, in this embodiment, the interval between adjacent tapping angles is set to a relatively small value, such as 1.5 degrees, which can reduce the intensity generated during ladle overflow.

[0039] Furthermore, at the tapping step where ladle overflow is detected, set the real-time tapping angle of the converter to be more upwardly inclined than the preset tapping angle, such as upwardly inclined by 0 to 2 degrees. For example, if the preset tapping angle is -95 degrees, if the ladle overflow signal is not detected at the current tapping step, then set the real-time tapping angle of the converter to remain -95 degrees unchanged. If the ladle overflow signal is detected at the current tapping step, then modify and set the real-time tapping angle of the converter to -94 degrees to immediately terminate the overflow state of the ladle.

[0040] Furthermore, the ladle overflow is a state that exists for a relatively short time. However, when the ladle overflow occurs, it usually means that the molten steel has flooded to the edge of the ladle. At this time, it is a feasible operation to automatically extend the tapping residence time of this tapping step by a certain amount (such as increasing by 10 to 20 seconds) to lower the molten steel level away from the edge of the ladle by a certain safe distance.

[0041] In the embodiment of the present invention, when the overflow at the furnace mouth disturbs the tapping process, the residence time of each subsequent tapping step can be automatically increased and allocated afterwards to eliminate the phenomenon of furnace mouth overflow occurring again during the tapping process. At the same time, the angle of the current tapping step is automatically lifted by a certain angle and the residence time of the current tapping step is automatically extended by a certain time to promptly suppress and eliminate the current furnace mouth overflow phenomenon. The embodiment of the present invention enhances the adaptability and safety of the real-time control of the converter automatic tapping process.

[0042] Embodiment 2:

[0043] The present invention also provides a tapping control terminal device for overcoming the overflow at the converter furnace mouth, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the steps of the method in Embodiment 1 of the present invention are implemented.

[0044] Furthermore, as an executable solution, the tapping control terminal device for overcoming the furnace mouth overflow can be a computing device such as a desktop computer. The tapping control terminal device for overcoming the furnace mouth overflow may include, but is not limited to, a processor and a memory. Those skilled in the art can understand that the composition structure of the above-mentioned tapping control terminal device for overcoming the furnace mouth overflow is only an example of the tapping control terminal device for overcoming the furnace mouth overflow, and does not constitute a limitation on the tapping control terminal device for overcoming the furnace mouth overflow. It may include more or fewer components than the above, or combine some components, or different components. For example, the tapping control terminal device for overcoming the furnace mouth overflow may also include input / output devices, network access devices, buses, etc. The embodiment of the present invention does not make any limitations in this regard.

[0045] Furthermore, as an executable solution, the processor may be a Central Processing Unit (CPU), or other general-purpose processors, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field-Programmable Gate Arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc. The processor is the control center of the tapping control terminal device for overcoming the furnace mouth overflow, and connects all parts of the tapping control terminal device for overcoming the furnace mouth overflow through various interfaces and lines.

[0046] The memory can be used to store the computer programs and / or modules. By running or executing the computer programs and / or modules stored in the memory, and by calling the data stored in the memory, the processor realizes various functions of the tapping control terminal device for overcoming the overflow at the furnace mouth. The memory mainly includes a program storage area and a data storage area. Among them, the program storage area can store an operating system and application programs required for at least one function; the data storage area can store data created according to the use of the computing program, etc. In addition, the memory can include high-speed random access memory, and can also include non-volatile memory, such as a hard disk, memory, plug-in hard disk, smart media card (SMC), secure digital (SD) card, flash card, at least one magnetic disk storage device, flash memory device, or other volatile solid-state storage devices.

[0047] The present invention also provides a computer-readable storage medium storing a computer program, and when the computer program is executed by a processor, the steps of the method in the first embodiment of the present invention are realized.

[0048] If the modules / units integrated in the tapping control terminal device for overcoming the overflow at the converter furnace mouth are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on such an understanding, to realize all or part of the processes in the above-mentioned embodiment methods of the present invention, it can also be completed by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium. When the computer program is executed by a processor, the various steps of the above-mentioned embodiment methods can be realized. Among them, the computer program includes computer program code, and the computer program code can be in the form of source code, object code, executable file or some intermediate form, etc. The computer-readable medium can include: any entity or device capable of carrying the computer program code, recording medium, USB flash drive, mobile hard disk, magnetic disk, optical disc, computer memory, read-only memory (ROM), random access memory (RAM), and software distribution medium, etc.

[0049] Although the present invention is specifically shown and described in conjunction with the preferred implementation embodiments, those skilled in the art should understand that various changes can be made to the present invention in terms of form and details without departing from the spirit and scope of the present invention defined by the appended claims, and all are within the protection scope of the present invention.

Claims

1. A steel tapping control method for overcoming the overflow at the converter mouth, characterized in that, It includes the following steps: Step 1: Divide the steel tapping process of the converter into three stages. The first stage is from the start of steel tapping to the position between the molten steel in the converter and the tapping hole of the converter. The second stage is from the position between the molten steel in the converter and the tapping hole of the converter to the first arrival at the edge of the tapping hole of the converter. The third stage is from the first arrival at the edge of the tapping hole of the converter to the end of steel tapping; Step 2: Construct a counter to record the number of times of tapping hole overflow for each heat. The counter is initially set to 0 at the start of steel tapping; Step 3: Collect the image of the tapping hole of the converter in real time through a camera device, and judge whether there is tapping hole overflow based on the image of the tapping hole of the converter; Step 4: When there is tapping hole overflow, increment the counter by 1, and calculate the time difference T corresponding to the current tapping hole overflow: T = x * b, where x represents the value of the counter and b represents the time constant; Step 5: Split the time difference into two parts, one part is allocated to the tapping angle in the second stage of the converter, and the other part is allocated to the tapping angle in the third stage of the converter; The time difference is allocated according to the proportion where the preset residence time is located in the allocation of different tapping angles in each stage of the converter; Step 6: Add the preset residence time of each tapping angle in the second stage and the third stage of the converter to the time difference allocation result, replace the preset residence time of each tapping angle of the converter with the added result, and control the subsequent steel tapping process of the current heat according to the replaced preset residence time, return to Step 3 until the end of steel tapping, and reset the counter to 0.

2. The molten steel tapping control method for overcoming the overflow at the furnace mouth according to claim 1, wherein: The start of steel tapping is determined by an automatic steel tapping start signal, and the end of steel tapping is determined by the arrival time of the earlier signal among the signal that the slag blocking slide plate has been closed returned by the slide plate slag blocking system or the signal that the converter starts to return to the zero tilt angle; 3. The steel tapping control method for overcoming the overflow at the furnace mouth according to claim 1, wherein: The time constant value is set to 100 seconds.

4. The molten steel tapping control method for overcoming the overflow at the furnace mouth according to claim 1, characterized in that: A relatively larger time difference is allocated to the tapping angle in the third stage of the converter compared to the tapping angle in the second stage.

5. The steel tapping control method for overcoming the overflow at the furnace mouth according to claim 1, characterized in that: The interval between adjacent tapping angles in each stage of the converter is set to 1.5 degrees.

6. The steel tapping control method for overcoming the overflow at the furnace mouth according to claim 1, characterized in that: In Step 4, when tapping hole overflow is detected, tilt the current tapping angle of the converter upward by 0 - 2 degrees.

7. The molten steel tapping control method for overcoming the overflow at the furnace mouth according to claim 1, wherein: In Step 4, when tapping hole overflow is detected, increase the residence time corresponding to the current tapping angle of the converter by 10 - 20 seconds.

8. A tapping control terminal device for overcoming the overflow at the furnace mouth, characterized in that: It includes a processor, a memory, and a computer program stored in the memory and running on the processor. When the processor executes the computer program, it implements the steps of the method as described in any one of Claims 1 - 7.

9. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by the processor, it implements the steps of the method as described in any one of Claims 1 - 7.

Images