A method for accurately and dynamically adjusting the relative position of steel flow and ladle during steel tapping

Abstract

The present invention relates to a method for accurately and dynamically adjusting the relative position of a steel stream and a ladle during the tapping process. The method comprises scanning the outer shell of the ladle before tapping from a converter to obtain scanning data and position information of the ladle, calculating the shape information of the ladle's lining, and then setting relative position A, relative position B, relative position C, and the tapping amount. The method then determines the relative position online to maintain precision control, and finally controls the position until the tapping is completed. The present invention, through the characteristics of radar surface scanning, can eliminate the problem of being unable to determine the ladle's position in real time due to interference. Simultaneously, the actual position of the steel stream can be obtained in real time. Therefore, the relative position of the steel stream and the ladle can be accurately identified and dynamically adjusted during the tapping process, thereby achieving inherent safety during the tapping process. Furthermore, the method can be precisely coordinated with the ladle's bottom blowing position to improve the melting effect of the alloy slag.

Description

Technical Field

[0001] This patent application belongs to the field of converter smelting technology, and more specifically, relates to a method for accurately and dynamically adjusting the relative position of the steel flow and the ladle during the steel tapping process. Background Art

[0002] Monitoring the relative position of the ladle and the steel stream during converter tapping is an important guarantee for achieving precise process control and safe production.

[0003] In conventional steel tapping operations, people use their eyes to roughly judge the distance between the steel flow and the edge of the ladle to confirm that the steel flow is in the ladle and the approximate position of the steel flow in the ladle, which can be used for rough adjustment. Some non-human operation methods, such as the use of laser ranging technology, Figure 1 As shown, since the steel tapping operation involves interference factors such as obstruction, real-time judgment during the steel tapping process cannot be achieved, and the actual position of the steel flow cannot be obtained, and human assistance is still required for judgment.

[0004] This patent aims to solve the above problems. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a method for accurately and dynamically adjusting the relative position of the steel flow and the ladle during the tapping process. The radar technology is used to scan the ladle shell before tapping, obtain the ladle information, and locate the ladle position. During the tapping process, the radar is used to monitor the ladle position in real time. The relative position of the steel flow and the ladle is accurately adjusted when adding materials, after adding materials, and before tapping is completed, so as to improve the melting effect of slag and effectively control the safety of tapping.

[0006] In order to solve the above problems, the technical solution adopted by the present invention is:

[0007] A method for accurately and dynamically adjusting the relative position of a steel stream and a ladle during a steel tapping process comprises the following steps:

[0008] Step 1: Scan the ladle shell information before tapping the converter to obtain the scanning data and position information of the ladle, thereby calculating the shape information of the ladle lining;

[0009] Step 2: According to the measured position data of the steel flow, the ladle position of the steel flow in the center area of the ladle is set, and the center area of the ladle is recorded as the relative position A. After the ladle reaches the relative position A, the steel begins to be tapped;

[0010] Step 3: When the steel tapping volume of the ladle reaches the first threshold, the steel flow is adjusted to the relative position B to prepare for the steel tapping process;

[0011] Step 4: Continuously judge the relative position of the steel stream and the ladle online to maintain precision control. When the distance between the two is greater than the set value, fine-tune the ladle position until the target range is reached.

[0012] Step 5: When the steel tapping volume from the ladle reaches the second threshold, the steel flow is adjusted to the relative position C to prevent slag from falling until the tapping is completed.

[0013] Furthermore, the diameter of the ladle is d, in mm; the relative position A is d / 2±200mm; the relative position B is the relative position A+300mm; and the relative position C is 200mm from the ladle mouth.

[0014] Furthermore, it is characterized in that the fluctuation errors of relative position A, relative position B, and relative position C are ±50 mm.

[0015] Furthermore, it is characterized in that the first threshold value is within 20% of the steel output, and the second threshold value is 20%-80% of the steel output.

[0016] Furthermore, it is characterized in that the second threshold value is 60%-80% of the steel output.

[0017] Furthermore, in step 4, "continuously make online judgments on the relative positions of the steel flow and the ladle to maintain precision control" means that online judgments are made every 2-5 seconds, with an identification accuracy of 10mm and a control accuracy of 50mm. When the deviation exceeds 50mm, the steel car automatically adjusts.

[0018] Due to the adoption of the above technical solution, the beneficial effects achieved by the present invention are:

[0019] The present invention utilizes radar technology to scan the outer shell of the ladle before tapping, obtains ladle information, locates the ladle position, and uses radar to monitor the ladle position in real time during the tapping process. The relative position of the steel flow and the ladle is accurately adjusted when adding materials, after adding materials, and before tapping ends, thereby improving the melting effect of the slag and effectively controlling the safety of tapping.

[0020] This solution leverages the radar's surface scanning capabilities to determine the ladle's position in real time, simultaneously providing the actual position of the steel stream. This eliminates the interference that prevents other technologies from accurately determining the ladle's position. Therefore, the relative positions of the steel stream and the ladle can be accurately identified and dynamically adjusted during the tapping process, ensuring an inherently safe tapping process. Furthermore, this solution precisely coordinates with the ladle's bottom blowing position to enhance the melting efficiency of alloy slag. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Schematic diagram of the dynamic monitoring of the ladle and steel flow position by laser during steel tapping in the background.

[0022] Figure 2 This is a diagram showing the position of the steel flow in the ladle in the present invention.

[0023] Figure 3This is a graph of the steel flow and ladle trajectory obtained in the present invention.

[0024] Among them, Figure 1 Among them, 1. converter, 2. steel flow, 3. ladle, 4. laser equipment. DETAILED DESCRIPTION

[0025] The present invention is further described in detail below with reference to the embodiments.

[0026] exist Figure 1 In the figure, the laser device 4 dynamically monitors the positions of the ladle 3 and the steel stream 2 during steel tapping of the converter 1, helping people understand the movement status of the ladle 3 and the steel stream 2.

[0027] The present invention provides a method for accurately and dynamically adjusting the relative position of the steel flow and the ladle during the steel tapping process, comprising the following steps:

[0028] Step 1: Scan the outer shell of the ladle before tapping the converter to obtain the scanning data and position information of the ladle, thereby calculating the shape information of the lining of the ladle.

[0029] Step 2: According to the actual measured position data of the steel flow at the start of tapping in the actual test (that is, the position data of the steel flow at the start of tapping in the actual test), the ladle position of the steel flow in the center area of the ladle is set. The center area of the ladle is recorded as relative position A. After the ladle reaches relative position A, tapping begins.

[0030] Step 3: When the steel tapping volume of the ladle reaches the first threshold, the steel flow is adjusted to the relative position B to prepare for the steel tapping process.

[0031] Step 4: Continue to judge the relative position of the steel flow and the ladle online to maintain precision control. When the distance between the two is greater than the set value, fine-tune the ladle position until the target range is reached.

[0032] Step 5: When the steel tapping volume from the ladle reaches the second threshold, the steel flow is adjusted to the relative position C to prevent slag from falling until the tapping is completed.

[0033] The diameter of the ladle is d, in mm; the relative position A is d / 2±200mm; the relative position B is relative position A+300mm; the relative position C is 200mm from the ladle mouth.

[0034] The fluctuation error of relative position A, relative position B, and relative position C is ±50mm.

[0035] The first threshold is within 20% of the steel tapping amount, and the second threshold is 20%-80% of the steel tapping amount. Preferably, the second threshold is 60%-80% of the steel tapping amount.

[0036] In step 4, "continuously perform online judgment on the relative position of the steel flow and the ladle to maintain precision control" means that online judgment is performed every 2-5 seconds, with an identification accuracy of 10mm and a control accuracy of 50mm. When the deviation exceeds 50mm, the steel car automatically adjusts. Example 1

[0037] First, the present invention comprises the following steps:

[0038] Step 1: If Figure 2 Ladle parameters: Ladle diameter 3940mm. With the left edge of the ladle as the zero point, set relative position A = 1970mm; relative position B = 2270mm; and relative position C = 3740mm. Bottom blowing holes are located above and below relative position B.

[0039] The absolute distance is determined by the radar scan, which is the distance from the mark to the radar scanner. Based on practical experience, the absolute distance of the steel flow at the start of tapping is 31,100 mm.

[0040] Step 2: The steel car arrives at the designated location. At this point, tapping begins with the steel stream at relative position A (within ±200mm of the ladle center). The radar continuously identifies the steel stream and ladle positions, ultimately adjusting the flow to a more precise, smaller range of ±50mm from the ladle center.

[0041] Step 3: When the steel output reaches 20%, adjust the position of the steel flow in the middle of the two bottom blowing holes according to radar monitoring, 2270 mm relative to the left edge of the ladle, that is, at relative position B, and prepare to add material during the steel tapping process.

[0042] Step 4: After the feeding is completed, the radar is used to make an online judgment on the relative position of the steel flow and the center of the ladle every 2-5 seconds. When the distance between the two is greater than the set value of 100mm, the ladle position is fine-tuned and the ladle is stopped when the target range is reached.

[0043] Step 5: Continue tapping until the tapping volume reaches 80%, and adjust the steel flow to 3740mm relative to the left edge of the ladle (that is, the steel flow is 200mm relative to the right edge of the ladle) until the tapping is completed. Example 2

[0044] Step 1: If Figure 2 As shown in the figure, the ladle parameters are: ladle diameter 3940mm. Taking the left side of the ladle as the zero point, set relative position A = 1970mm; relative position B = 2270mm; relative position C = 3740mm.

[0045] Step 2: The steel car arrives at the designated position. At this time, the left side position of the ladle is 29130mm. At this time, the relative position A of the steel flow is 1970mm (within the range of ±200mm from the center of the ladle). Steel tapping begins. The laser radar continuously identifies the position of the steel flow and the ladle, and adjusts the steel flow to within ±50mm from the center of the ladle.

[0046] Step 3: Set and execute the steel tapping process according to Table 1 to achieve real-time control of the relative position of the steel flow and ladle.

[0047] Table 1 Steel tapping setting table

[0048]

[0049] Combine Figure 2 The position diagram of the steel flow in the ladle and the steel tapping setting table in the table above are used to obtain the steel flow and ladle tapping trajectory. Figure 3 shown.

Claims

1. A method for accurately and dynamically adjusting the relative position of the steel flow and the ladle during the steel tapping process, characterized in that: The following steps are involved: Step 1: Scan the ladle shell information before tapping the converter to obtain the scanning data and position information of the ladle, thereby calculating the shape information of the ladle lining; Step 2: According to the measured position data of the steel flow, the ladle position of the steel flow in the center area of the ladle is set, and the center area of the ladle is recorded as the relative position A. After the ladle reaches the relative position A, the steel begins to be tapped; Step 3: When the steel tapping volume of the ladle reaches the first threshold, the steel flow is adjusted to the relative position B to prepare for the steel tapping process; Step 4: Continuously judge the relative position of the steel stream and the ladle online to maintain precision control. When the distance between the two is greater than the set value, fine-tune the ladle position until the target range is reached. Step 5: When the ladle tapping volume reaches the second threshold, the steel flow is adjusted to the relative position C to prevent slag from falling until the tapping is completed; The diameter of the ladle is d, in mm; The relative position A is d / 2±200mm; the relative position B is relative position A+300mm; the relative position C is 200mm from the ladle edge to the ladle mouth; the first threshold is within 20% of the steel output, and the second threshold is 20%-80% of the steel output.

2. The method for accurately and dynamically adjusting the relative position of the steel flow and the ladle during the steel tapping process according to claim 1, characterized in that: The fluctuation error of relative position A, relative position B, and relative position C is ±50mm.

3. The method for accurately and dynamically adjusting the relative position of the steel flow and the ladle during the steel tapping process according to claim 1, characterized in that: The second threshold is 60%-80% of the steel output.

4. The method for accurately and dynamically adjusting the relative position of the steel flow and the ladle during the steel tapping process according to any one of claims 1 to 3, characterized in that: In step 4, "continuously perform online judgment on the relative position of the steel stream and the ladle to maintain precision control" means that online judgment is performed every 2-5 seconds, with an identification accuracy of 10mm and a control accuracy of 50mm. When the deviation exceeds 50mm, the steel car automatically adjusts.

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