Detection system for performing gas testing on steel ladle bottom blowing system during hot repair

Abstract

The utility model discloses a detection system for performing gas testing on a steel ladle bottom blowing system during hot repair, a steel ladle is flatly placed on the ground of a steel mill, and the bottom of the steel ladle is vertical to the ground; a first steel ladle argon blowing nozzle is installed on the side wall of the steel ladle and used for conducting gas testing on the steel ladle when the steel ladle is subjected to hot repair. The detection system comprises a gas testing pipe, a gas flow instrument and a gas testing platform, is arranged close to the position where the steel ladle is in hot repair, and is used for connecting the gas testing pipe to a first steel ladle argon blowing nozzle of the steel ladle by a worker through the gas testing platform, so that gas testing is facilitated; according to the utility model, the quantification of the flow inspection standard of gas testing can be realized, and the accuracy of bottom blowing effect detection is improved; it is ensured that gas testing truly reflects the bottom blowing condition after online, and the casting blank quality problem caused by poor bottom blowing is avoided.

Description

Technical Field

[0001] This utility model belongs to the field of bottom blowing technology for steel ladles in the iron and steel metallurgical industry, and particularly relates to a testing system for testing the bottom blowing system of steel ladles during hot repair. Background Technology

[0002] In steel metallurgical production, bottom blowing of the ladle is a crucial process. Its function is to uniformly distribute the temperature and composition of molten steel, remove inclusions, and improve steel quality by blowing gas into the bottom of the ladle. Accurate detection of the effectiveness of bottom blowing is essential for ensuring the quality of cast billets.

[0003] In converter steelmaking processes, referring to GB / T 34485-2017, the bottom blowing system of the ladle must meet the following technical requirements: gas supply pressure range: 0.4-0.6MPa; air permeability of a single permeable brick ≥50L / min·cm 2 The pipeline leakage rate should be ≤3% / h. Traditional detection methods include visual inspection (observing fluctuations in the molten steel surface) and acoustic judgment (listening to the sound of gas flow). However, these methods lack quantitative standards and rely primarily on workers' visual observation and auditory perception to determine the bottom blowing status. Specifically, two pipes at the bottom of the ladle are used for testing, but normal production blowing uses two pipes on the ladle's sidewall. Due to the lack of objective standards, different workers have varying judgment criteria, leading to inaccurate gas volume measurements. Furthermore, minute leaks in the pipelines are difficult to detect. Additionally, the two pipes on the ladle's sidewall are too high for high-altitude testing, making it impossible to guarantee proper bottom blowing after production begins.

[0004] Therefore, existing testing methods are highly subjective and lack quantitative standards, leading to inaccurate judgments of bottom blowing effects and an inability to precisely control bottom blowing quality. Secondly, the testing pipelines are inconsistent with the actual pipelines used, and the two pipelines on the ladle sidewall cannot be tested, making it difficult to guarantee the bottom blowing effect after the system is put into operation, increasing the risk to billet quality. Furthermore, high-altitude testing poses safety hazards. Utility Model Content

[0005] The purpose of this invention is to provide a testing system for testing the bottom blowing system of a ladle during hot repairs, in order to solve the problems of strong subjectivity and lack of quantitative standards in testing during hot repairs, as well as the inability to test the two pipes on the side wall of the ladle.

[0006] The present invention adopts the following technical solution: a testing system for testing the bottom blowing system of a steel ladle during hot repair, wherein the steel ladle is placed flat on the steel plant ground and the bottom of the steel ladle is perpendicular to the ground; a first steel ladle argon blowing nozzle is installed on the side wall of the steel ladle, and the first steel ladle argon blowing nozzle is used to test the steel ladle during hot repair.

[0007] The detection system includes:

[0008] The test tube has one end used to connect to the ladle through the first ladle argon blowing nozzle during hot repair, and the other end is connected to an external gas source.

[0009] A gas flow meter, installed on a test tube, is used to detect the flow rate of gas passing through the test tube.

[0010] The gas testing platform is located near the ladle during hot repairs. It is used by workers to connect the gas testing pipe to the first ladle argon blowing nozzle of the ladle, thus facilitating gas testing.

[0011] The testing platform includes:

[0012] The standing platform consists of a base platform and two extended platforms. The base platform is a cuboid or cube-shaped platform near the bottom of the ladle. The two extended platforms are respectively located on both sides of the ladle. The two extended platforms are integrally connected to the base platform and extend from the bottom to the top of the ladle, so that workers can stand on the extended platforms to connect the test gas tube to the argon blowing nozzle of the first ladle.

[0013] The beneficial effects of this utility model are:

[0014] This invention can quantify the flow rate inspection standard for gas testing, improve the accuracy of bottom blowing effect detection, ensure that gas testing truly reflects the bottom blowing status after the line is put into operation, avoid billet quality problems caused by poor bottom blowing, eliminate the risks of high-altitude gas testing operations, and ensure the safety of personnel.

[0015] This utility model allows workers to test the two pipes on the side wall of the ladle by setting up a testing platform, ensuring the bottom blowing effect after the ladle is put into production; it improves the bottom blowing process of the ladle, ensures the bottom blowing permeability of the ladle, and guarantees the quality of the cast billet and production safety. Attached Figure Description

[0016] Figure 1 This is a top view of the present invention;

[0017] Figure 2 This is a schematic diagram of the structure of this utility model.

[0018] Among them: 10, first ladle argon blowing nozzle; 11, test platform; 12, ladle; 13, base platform; 14, extension platform. Detailed Implementation

[0019] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0020] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "multiple" means two or more. The term "orientation" in this utility model refers to the orientation of the utility model within the... Figure 1 Description of the state's progression.

[0021] This utility model discloses a testing system for testing the bottom blowing system of a steel ladle during hot repairs, such as... Figure 1 and Figure 2 As shown, the ladle 12 is placed flat on the steel plant floor, with its bottom perpendicular to the ground. A first ladle argon blowing nozzle 10 is installed on the side wall of the ladle 12. The first ladle argon blowing nozzle 10 is used to test the ladle 12 with gas during hot repairs. Two first ladle argon blowing nozzles 10 are provided.

[0022] Two second ladle argon nozzles are also provided at the bottom of the ladle 12. Both the first ladle argon nozzle 10 and the second ladle argon nozzle can be used for gas testing. However, during hot repair, the second ladle argon nozzle is in a hot repair state and therefore cannot be tested. Hot repair refers to the repair of various components at the bottom of the ladle 12 after the molten steel has been poured out. Because during long-term use, the lining (such as refractory material) of the ladle 12 will gradually wear down due to factors such as high-temperature molten steel erosion and chemical corrosion. When the lining thickness is lower than the safety threshold or local damage occurs, it is necessary to carry out rapid repair while the ladle 12 is not completely cooled in order to maintain its normal service life and safety.

[0023] The testing system includes: a test tube, a gas flow meter, and a test platform 11.

[0024] One end of the test tube is used to connect to the ladle 12 via the first ladle argon nozzle 10 during hot repairs, and the other end of the test tube is connected to an external gas source.

[0025] The gas flow meter is installed on the test tube and is used to detect the flow rate of gas passing through the test tube.

[0026] The gas testing platform 11 is located near the ladle 12 during hot repairs. The gas testing platform 11 is used by workers to connect the gas testing pipe to the first ladle argon nozzle 10 of the ladle 12, thereby facilitating gas testing.

[0027] The gas testing platform 11 includes a standing platform, which consists of a base platform 13 and two extended platforms 14. The base platform 13 is a cuboid or cube platform near the bottom of the ladle 12. The two extended platforms 14 are respectively located on both sides of the ladle 12. The two extended platforms 14 are integrally connected to the base platform 13 and extend from the bottom of the ladle 12 to the top of the ladle 12, so that workers can stand on the extended platforms 14 to connect the gas testing tube to the first ladle argon nozzle 10.

[0028] The two extended platforms 14 extend to a position close to the first ladle argon blowing nozzle 10. Preferably, the two extended platforms 14 extend to the line connecting the perpendicular points of the two first ladle argon blowing nozzles 10 on the plane of the testing platform 11. This ensures that the worker can connect the testing tube to the first ladle argon blowing nozzle 10.

[0029] The length and width of the two extended platforms 14 are equal.

[0030] The test platform 11 is equipped with support legs at the bottom, a ladder on one side of the test platform 11, and railings along the edge of the test platform 11.

[0031] The height h of the test platform 11 is a-1, where a is the diameter of the ladle 12 in meters.

[0032] This invention involves installing a gas flow meter on the bottom-blowing test tube of the ladle 12 to accurately measure and display the bottom-blowing gas flow rate in real time. During installation, it is connected to the test tube through standard fittings. Its high-precision flow sensor senses the gas flow rate, and after processing by an internal algorithm, the flow rate value is displayed on a digital screen.

[0033] Bottom blowing in the ladle has a significant impact on the quality of the cast billet. In actual production, poor bottom blowing can lead to uneven steel composition and insufficient removal of inclusions, thus affecting the internal and surface quality of the cast billet. This invention quantifies the bottom blowing flow rate inspection standard, eliminates the uncertainty of subjective judgment, greatly improves the accuracy of bottom blowing effect detection, and fundamentally solves the billet quality problems caused by poor bottom blowing before the new ladle is put into operation. On the other hand, it eliminates the risks of high-altitude gas testing operations, ensures personnel safety, and significantly reduces the defect rate of cast billets caused by bottom blowing problems.

[0034] After installing the gas flow meter, the flow rate of the test tube is ≥180 m³ / h when it is not connected to the first ladle argon nozzle 10. 3 / h, with the air-permeable brick in place, when the test tube is connected to the first ladle argon nozzle 10, the flow rate of the test tube is 50m³ / h.3 / h-80m 3 The range of / h is considered normal; anything outside this range is considered a blockage or leak in the venting pipe and permeable bricks of the ladle 12.

[0035] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A testing system for testing the bottom blowing system of a ladle during hot repair, characterized in that, The ladle (12) is placed flat on the steel plant ground with its bottom perpendicular to the ground. A first ladle argon nozzle (10) is installed on the side wall of the ladle (12). The first ladle argon nozzle (10) is used to test the ladle (12) by blowing gas through the ladle (12) during hot repair. The detection system includes: The test tube has one end connected to the ladle (12) through the first ladle argon nozzle (10) during hot repair, and the other end connected to the external gas source. A gas flow meter, installed on the test tube, is used to detect the flow rate of gas passing through the test tube; The gas testing platform (11) is set up near the location of the ladle (12) during hot repair. It is used by workers to connect the gas testing pipe to the first ladle argon nozzle (10) of the ladle (12) using the gas testing platform (11), so as to facilitate gas testing. The gas testing platform (11) includes: The standing platform consists of a base platform (13) and two extension platforms (14). The base platform (13) is a cuboid or cube platform near the bottom of the ladle (12). The two extension platforms (14) are respectively located on both sides of the ladle (12). The two extension platforms (14) are integrally connected to the base platform (13) and extend from the bottom of the ladle (12) to the top of the ladle (12), so that workers can stand on the extension platforms (14) to connect the test gas tube to the first ladle argon nozzle (10).

2. The detection system for testing the bottom blowing system of a ladle during hot repair as described in claim 1, characterized in that, The two extended platforms (14) extend to a position close to the first ladle argon nozzle (10).

3. The detection system for testing the bottom blowing system of a ladle during hot repair as described in claim 1, characterized in that, The two extended platforms (14) are of equal length.

4. The detection system for testing the bottom blowing system of a ladle during hot repair as described in claim 1, characterized in that, The test platform (11) is provided with support legs at its bottom, a ladder is provided on one side of the test platform (11), and a railing is provided at the edge of the test platform (11).

5. The detection system for testing the bottom blowing system of a ladle during hot repair as described in claim 1, characterized in that, The height h of the test platform (11) is a-1, where a is the diameter of the ladle (12) in meters.

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