Welding slag ladle for containing copper slag and design method

Abstract

The invention discloses a welding slag ladle for containing copper slag and a design method. The welding slag ladle is suitable for containing, cooling and inverted placing procedures of high-temperature copper slag. The cinder ladle comprises a cylinder body, a ladle bottom, rib plates, trunnions and supporting legs, the cylinder body and the ladle bottom are formed by welding high-temperature-resistant and high-strength rolled plates, the thickness of the cylinder body is 70-100 mm, and the thickness of the ladle bottom is 80-120 mm; setting an inclination angle beta of 11.5-21 degrees relative to the center line of the bus of the cylinder body, and controlling the roughness of the inner wall to be less than or equal to 12.5 microns so as to reduce the separation resistance after the copper slag is cooled; thickness combination, stress distribution, deformation and rib plate arrangement are optimized through structural mechanical simulation, and it is ensured that the structural strength meets the requirements under high temperature and thermal cycle loads; full penetration weld joints are adopted, nondestructive testing is carried out, and the welding reliability is guaranteed; compared with a traditional casting cinder ladle, the mass of the cinder ladle is reduced by 10%-15%, the deslagging efficiency is improved, the service life is prolonged to more than two times of the original service life, and the cinder ladle has the advantages of being light in structure, high in bearing capacity, high in deformation resistance and good in maintainability.

Description

Technical Field

[0001] This invention belongs to the field of metallurgical process equipment technology, specifically relating to a welding slag bag for collecting copper slag and its design method. Background Technology

[0002] In non-ferrous metallurgical processes such as copper smelting, the handling and rapid cooling characteristics of high-temperature copper slag directly affect production safety, slag removal efficiency, and equipment lifespan. Currently, the commonly used foundry slag ladles are limited by the casting process in terms of structure and material properties, resulting in insufficient overall strength, poor resistance to thermal cracking, large unit volume mass, and weak repairability. These issues make it difficult to meet the demands of modern metallurgical enterprises for high-temperature, high-load, and long-life equipment. Furthermore, the high roughness of the foundry slag ladle's inner wall makes it prone to adhesion and retention during the slag removal process after copper slag cooling, affecting slag removal efficiency and operational safety. Additionally, there is a lack of mature technical approaches for structural dimension design adapted to the characteristics of copper slag. Summary of the Invention

[0003] A welding slag ladle for collecting copper slag includes a cylinder, a bottom, a load-bearing component, a support component, and a slag-pouring component. The cylinder and the bottom are formed by welding plates. The cylinder has an inclined generatrix relative to its axis. The angle β between the generatrix and the center line of the cylinder is 11.5° to 21°.

[0004] The cylinder body is made of high-temperature resistant structural plate with a thickness of 70-100mm, and the bottom plate has a thickness of 80-120mm.

[0005] The applicable length of the cylinder busbar is 1500~3150mm.

[0006] The technical solution provided in this application also has the following technical features:

[0007] Preferably, in one embodiment of this application, the cylinder is formed from rolled sheet metal with a surface roughness of no more than 25 μm.

[0008] Preferably, in one embodiment of this application, the weld joint between the bottom of the package and the cylinder is a full penetration structure, and the weld is screened by non-destructive testing.

[0009] Preferably, in one embodiment of this application, the support member includes a leg located at the bottom of the slag bag, the leg being used to maintain the overall stability of the slag bag during the slag loading and cooling stages.

[0010] Preferably, in one embodiment of this application, the supporting member and the slag-pouring fitting member include stiffening plates and trunnions arranged circumferentially along the outer side of the cylinder.

[0011] Preferably, in one embodiment of this application, the volume range of the slag bag is [missing information]. .

[0012] Preferably, in one embodiment of this application, the cylinder is formed from rolled sheet with a surface roughness of 12.5 μm.

[0013] Preferably, in one embodiment of this application, a method for designing a welding slag bag for collecting copper slag, used to implement the above-mentioned welding slag bag for collecting copper slag, includes the following steps:

[0014] S1, based on the copper smelting working conditions parameters, obtain the slag ladle design load, slag temperature, target volume and slag dumping method;

[0015] S2. Based on the material database, select high-temperature resistant structural plates that meet the requirements of high-temperature strength, thermal stability and welding performance, and determine the plate types of the cylinder and the bottom of the casing.

[0016] S3, through structural mechanics simulation, the thickness of the cylinder and the bottom of the casing are determined to ensure that the maximum working stress is lower than the allowable stress of the material and to meet the overall deformation limit;

[0017] S4. Determine the cylinder generatrix inclination angle β based on the slag removal conditions after cooling, so as to minimize the slag discharge resistance.

[0018] S5. Based on the simulation analysis results, set the dimensions and arrangement of stiffeners, trunnions, and legs to form a welded structure that can meet long-term thermal cycling and mechanical loads, and obtain the structural design scheme of the weld slag bag.

[0019] Preferably, in one embodiment of this application, the slag bag is simulated to include at least high-temperature load, tipping stress, thermal cycle stress and deformation, in order to determine the structural parameters of the cylinder, bottom of the bag, stiffeners, trunnions, load-bearing components, support components and slag-pouring components.

[0020] Preferably, in one embodiment of this application, in step S3, by... A parameterized model is established for the slag bag within the volume range to achieve automated linkage design of the cylinder thickness, bottom thickness, diameter, and cylinder length. The included angle β between the cylinder generatrix and the cylinder centerline is 11.5° to 21°. The cylinder plate thickness is 70 to 100 mm of high-temperature resistant structural plate, and the bottom plate thickness is 80 to 120 mm. The applicable range of cylinder generatrix length is 1500 to 3150 mm.

[0021] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

[0022] Compared with the prior art, the technical solution of this application has achieved the following technical advancements:

[0023] 1. In order to solve the problems of insufficient strength, high tendency to hot cracking, unsmooth slag pouring and short service life of traditional casting slag ladles under high temperature and heavy load copper slag conditions, this application adopts a complete set of design methods, such as welded structure system, optimized plate thickness combination, setting cylinder generatrix inclination angle β and controlling inner wall roughness, to overcome the defects of casting structure non-adjustable, high surface roughness and imperfect parameter system, and achieve comprehensive technical effects of improved structural load-bearing capacity, improved slag pouring efficiency, extended service life and reduced weight;

[0024] 2. In order to solve the problems of rough inner wall of existing slag ladles and easy adhesion and retention of copper slag after cooling, this application adopts rolled plate with surface roughness of no more than 25μm, such as 12.5μm rolled plate, and optimizes the generatrix angle β of the cylinder, so as to significantly reduce the detachment resistance of molten slag after cooling, overcome the defects of high inner wall roughness and high friction coefficient of traditional casting slag ladles, and achieve the technical effects of smooth slag pouring, improved operation safety and reduced slag rate after cooling.

[0025] 3. To address the problem that the structural dimensions of welding slag flasks are difficult to adapt to different volume requirements, this application provides optimized cylinder thickness, flask bottom thickness, busbar length, and volume range. This overcomes the shortcomings of traditional designs that rely on experience and lack a systematic basis for parameter selection, achieving improved design efficiency, more accurate parameter matching, and wider applicability. The technical effects;

[0026] 4. In order to solve the problem of weld fatigue and structural deformation caused by long-term thermal cycling of high-temperature copper slag, this application adopts technical optimization methods such as full penetration weld and non-destructive testing screening to overcome the defects of insufficient fatigue resistance and weak weld reliability of ordinary welded structures, and achieves the technical effects of improving overall strength, reducing deformation and enhancing long-term service stability. Attached Figure Description

[0027] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0028] Figure 1 This is a front view of a welding slag bag for collecting copper slag, according to one embodiment.

[0029] Figure 2 This is a cross-sectional view of a welding slag bag for collecting copper slag, according to one embodiment.

[0030] Figure 3 This is one embodiment of a welding slag bag for collecting copper slag. Simulated stress distribution diagram of slag bag under rated load;

[0031] Figure 4 This is one embodiment of a welding slag bag for collecting copper slag. Simulated strain distribution diagram of slag bag under rated load;

[0032] Figure 5 This is one embodiment of a welding slag bag for collecting copper slag. Simulated stress distribution diagram of slag bag under rated load;

[0033] Figure 6 This is one embodiment of a welding slag bag for collecting copper slag. Simulated strain distribution diagram of slag bag under rated load;

[0034] Components in the diagram:

[0035] 1. Cylinder body

[0036] 2. Trunnion

[0037] 3. Ring plate

[0038] 4. Rib board

[0039] 5. Bottom of the bag

[0040] 6. Support legs. Detailed Implementation

[0041] The specific embodiments of this application will be further described in detail below with reference to the accompanying drawings. These embodiments are only for illustrating this application and are not intended to limit the invention.

[0042] In the description of this invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for 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. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0043] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0044] Furthermore, in the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0045] With the development of steel plate rolling and welding technology, welded slag ladles have potential advantages in terms of structural strength, material properties and maintainability. However, the existing published literature on structural parameter systems for copper slag working conditions is not yet perfect. For example, key parameters such as cylinder thickness, ladle bottom thickness, cylinder generatrix angle, surface roughness, and thermal load adaptability lack complete design methods, resulting in the absence of a mature solution that can be directly applied in the copper smelting industry.

[0046] Therefore, there is an urgent need in this field for a welded slag bag structure that can maintain structural stability, smooth slag discharge, long service life, and ease of manufacture and maintenance under high-temperature, large-volume conditions. Optimizing technical elements such as cylinder geometry, material properties, wall thickness combinations, stress distribution, and weld quality could significantly reduce equipment weight and cost, improve slag discharge efficiency, deformation resistance, and long-term service reliability, providing a feasible technical path to replace traditional casting slag bags. Furthermore, the technology can be further refined from dimensions such as life cycle cost, anti-aging performance, thermal shock resistance, and ease of structural repair, achieving system-level performance optimization of metallurgical slag bag equipment.

[0047] like Figure 1-2 A welding slag bag for collecting copper slag includes a cylinder 1, a bottom 5, a load-bearing component, a support component, and a slag-pouring component, wherein the cylinder 1 and the bottom 5 are formed by welding plates.

[0048] The cylinder 1 is provided with an inclined cylinder generatrix relative to the cylinder axis, and the angle β between the cylinder generatrix and the cylinder centerline is 11.5° to 21°.

[0049] The plate thickness of cylinder 1 is 70-100mm high temperature resistant structural plate, and the plate thickness of bottom 5 is 80-120mm;

[0050] The applicable length of the cylinder busbar ranges from 1500 to 3150 mm;

[0051] Key Implementation Points: The core of this welded slag bag implementation lies in achieving safe and smooth loading and unloading of high-temperature copper slag through reasonable configuration of cylinder geometry parameters, plate thickness, and welding structure. High-temperature resistant, high-strength rolled plates with a thickness of 70–100 mm are used to construct the cylinder, while plates with a thickness of 80–120 mm are used to construct the bottom, meeting the strength and deformation resistance requirements under high temperature and heavy load conditions. Based on the detachment characteristics of copper slag after cooling, the cylinder generatrix is ​​set with an inclination of β=11.5°–21° relative to the centerline, making it easy for the solidified copper slag to slide off under gravity. Simultaneously, the cylinder generatrix length is controlled between 1500 and 3150 mm, ensuring that the overall structure meets both volume requirements and considers stress uniformity and manufacturability, thus forming a workable, verifiable, and maintainable welded slag bag structure system.

[0052] The working principle of the slag bag is based on the characteristics of high-temperature copper slag in the welded steel plate structure, including its loading, slow cooling, and detachment. When receiving copper slag at around 1350℃, the thick plate structure of the cylinder and bottom of the bag bears the main thermal shock and static load, while the welded joints and reinforced components ensure that the whole structure does not undergo dangerous deformation. As the copper slag cools and solidifies, the shrinkage of its bottom and side walls, combined with the low roughness of the inner wall, allows the solid copper slag to form limited contact with the cylinder. During the slag dumping operation, the inclination angle β of the cylinder generatrix provides an effective gravity component, causing the solidified slag to slide smoothly down the inclined wall, reducing adhesion, improving dumping efficiency, and ultimately achieving safe and complete discharge.

[0053] Specifically, in one embodiment of this application, the cylinder 1 is formed from rolled sheet metal with a surface roughness of no more than 25 μm;

[0054] The welded joint between the bottom 5 and the cylinder 1 is a full penetration structure, and the weld is screened by non-destructive testing; the supporting components include the legs 6 located at the bottom 5, which are used to maintain the overall stability of the slag bag during the slag loading and cooling stages; the supporting components and slag pouring components include stiffening plates 4 and trunnions 2 arranged circumferentially along the outer side of the cylinder 1; a ring plate 3 is also provided on the outer side of the cylinder 1.

[0055] To address the issues of slag adhesion to the inner wall, insufficient structural strength, and poor slag discharge in foundry slag ladles under high temperature and heavy load conditions, a combined design was developed. This design incorporates a cylindrical body formed from rolled sheet metal with a surface roughness of no more than 25 μm, a fully penetrated and non-destructively tested cylindrical-bottom welded joint, a support leg structure located at the bottom of the ladle, and reinforcing components such as stiffening plates, trunnions, and ring plates arranged circumferentially along the outer side of the cylindrical body. This approach overcomes the shortcomings of traditional foundry slag ladles, such as high inner wall roughness, uncontrollable welding quality, prominent weak points, and a lack of reliable support and turning connection points. The result is improved overall load-bearing capacity and deformation resistance, reduced slag discharge resistance, enhanced stability during slag loading and cooling, and ensured long-term thermal cycling. Technical effects on structural safety under ring conditions; In the implementation of this embodiment, it is necessary to ensure that the surface quality and material properties of the rolled plate meet the high-temperature strength requirements, the weld should strictly implement the full penetration and non-destructive testing process, and the arrangement of the support legs and stiffening plates must be consistent with the force path to avoid local stress concentration; Equivalent alternatives include replacing the 25μm surface roughness plate with a 12.5μm roughness heat-resistant steel plate to further expand the application field of welding slag bags, replacing the ring plate and stiffening plates with an integral grid structure to improve circumferential stiffness, or replacing the trunnion with a high-strength alloy steel integral forging to improve the overturning fatigue life, all of which can achieve the same technical functions and effects under equivalent structural conditions.

[0056] Specifically, in one embodiment of this application, the volume range of the slag bag is [missing information]. The cylinder 1 is formed from rolled sheet with a surface roughness of 12.5 μm.

[0057] Specifically, in one embodiment of this application, a method for designing a welding slag bag for collecting copper slag, used to implement the aforementioned welding slag bag for collecting copper slag, includes the following steps:

[0058] S1, based on the copper smelting working conditions parameters, obtain the slag ladle design load, slag temperature, target volume and slag dumping method;

[0059] S2. Based on the material database, select high-temperature resistant structural plates that meet the requirements of high-temperature strength, thermal stability and welding performance, and determine the plate types of cylinder 1 and bottom 5.

[0060] S3, through structural mechanics simulation, the thickness of cylinder 1 and bottom 5 are determined to ensure that the maximum working stress is lower than the allowable stress of the material and to meet the overall deformation limit.

[0061] S4. Determine the cylinder generatrix inclination angle β based on the slag removal conditions after cooling, so as to minimize the slag discharge resistance.

[0062] S5. Based on the simulation analysis results, set the size and arrangement of stiffener 4, trunnion 2, and support leg 6 to form a welded structure that can meet long-term thermal cycling and mechanical load, and obtain the structural design scheme of weld slag bag.

[0063] The slag bag is simulated to include at least high temperature load, tipping stress, thermal cycle stress and deformation, in order to determine the structural parameters of the cylinder 1, the bottom 5, the stiffening plate 4, the trunnion 2, the load-bearing components, the supporting components and the slag-pouring components;

[0064] In step S3, by... A parameterized model is established for the slag bag within the volume range to achieve automated linkage design of the cylinder thickness, bottom thickness, diameter, and cylinder length. The included angle β between the cylinder generatrix and the cylinder centerline is 11.5° to 21°. The plate thickness of cylinder 1 is 70 to 100 mm of high-temperature resistant structural plate, and the plate thickness of bottom 5 is 80 to 120 mm. The applicable range of cylinder generatrix length is 1500 to 3150 mm.

[0065] To address the issues of traditional slag ladles relying on experience-based structural selection and struggling to balance high-temperature strength, slag removal efficiency, and long-term thermal cycling stability, a structured design process driven by operating parameters is adopted. This process uses design load, molten slag temperature, volume, and slag removal method as inputs. High-temperature resistant structural plates are selected, and structural mechanics simulations determine the thickness of the cylinder and bottom. The cylinder generatrix inclination angle is set based on the slag detachment pattern after cooling, transforming the design process from qualitative to quantitative. This overcomes the shortcomings of traditional designs, such as excessive local thickening, high slag removal resistance, and unclear fatigue points in welded structures. The result is controllable structural safety margin, reduced slag removal resistance, increased weld joint life, and improved overall design efficiency. Specifically, this is achieved through… A parameterized model of the slag bag is constructed to generate the cylinder thickness, bottom thickness, diameter and length in a linked manner, and the included angle β of the generatrix is ​​limited to 11.5° to 21°, the cylinder thickness to 70 to 100 mm, the bottom thickness to 80 to 120 mm, and the generatrix length to 1500 to 3150 mm.

[0066] For example, β is 11.5°, 16°, 21°;

[0067] The cylinder thickness is 70 mm, 85 mm, or 100 mm.

[0068] The thickness of the bag base is 80mm, 100mm, and 120mm;

[0069] The busbar lengths are 1500 mm, 2325 mm, and 3150 mm;

[0070] To meet the simulation boundary conditions, multi-condition analysis is performed on high-temperature load, tilting load, thermal cycle and deformation to optimize the arrangement of stiffeners, trunnions and legs. If further reinforcement of local structures is required under specific conditions, they can be replaced with heat-resistant steel plates with higher yield strength, multi-pass welding process with controllable heat input or local circumferential reinforcing rings can be added, but the overall parametric design and simulation-driven design logic will not be changed, and they are considered equivalent solutions.

[0071] Specifically, in one embodiment of this application, when receiving slag, simulation analysis is used to design a slag collection bag that meets the required volume requirements, based on the operating conditions of copper slag used in non-ferrous metal enterprises, especially copper smelting enterprises. The required welding slag bag structure design, in which the relevant technical parameters of the cylinder, bottom, etc. are crucial, are the key to ensuring the overall structural strength, deformation resistance, slag dumping efficiency and service life of the slag bag;

[0072] A welding slag ladle suitable for collecting copper slag includes a cylinder 1, trunnions 2, ring plates 3, stiffening plates 4, ladle bottom 5, support legs 6, and matching accessories;

[0073] The slag ladle's body 1 and bottom 5 are made of regularly rolled low-alloy high-strength steel plates. The sulfur and phosphorus content, which are prone to hot and cold cracking, is strictly controlled to 0.015%. Its mechanical properties are 50% higher than those of cast slag ladles, and it possesses excellent weldability. Simulation analysis, simulating non-ferrous metallurgical conditions, particularly copper smelting, and applying a rated load, shows that when the slag ladle volume is... Within the specified range, the cylinder thickness A is 70–100 mm, and the bottom thickness B is 80–120 mm; the steel plate thickness deviation shall comply with national standards.

[0074] like Figure 2As shown, it meets the requirements for handling copper slag with a temperature as high as 1350℃; when applied in the slow cooling process of copper slag, its service life is more than 15 years, which is about twice that of the existing casting slag pot. Secondly, the inclination angle β of the cylinder generatrix is ​​related to whether the copper slag can be easily poured out of the slag pot after cooling. This angle is measured by the angle between the cylinder generatrix and the cylinder rotation center line. This angle has a lower limit value and a suitable angle range. Through theoretical calculation and experimental verification, the reasonable range of angle β is 11.5°~21°, and the applicable range of cylinder generatrix L is 1500~3150mm, which meets the structural size requirements. At the same time, the surface roughness of the rolled steel plate used to manufacture the welding slag pot can reach 12.5μm, while the surface roughness of the inner wall of the casting slag pot is usually 25~100μm or even higher. Therefore, when the copper slag is poured out after cooling in the welding slag pot, the copper slag and the inner wall of the welding slag pot have a smaller coefficient of friction than the casting slag pot, ensuring the efficiency of slag pouring.

[0075] Specifically, in one embodiment of this application, simulation analysis was performed to verify this application;

[0076] Simulation analysis data of slag bag under rated load:

[0077] Maximum stress 89MPa, trunnion stress 28MPa, such as Figure 3 :

[0078] Maximum strain 0.33mm, such as Figure 4 ;

[0079] Simulation analysis data of slag bag under rated load:

[0080] Maximum stress 88MPa, trunnion stress 40MPa, such as Figure 5 ;

[0081] Maximum strain 0.37mm, such as Figure 6 ;

[0082] All welds of the main load-bearing components of the slag bag were inspected for defects. For parts that could not be inspected, welding was carried out in accordance with the inspection requirements to ensure that the overall quality met the requirements of the on-site working conditions.

[0083] This slag bag design is suitable for non-ferrous metallurgical enterprises, especially copper smelting enterprises, to collect smelting slag and is adaptable to different slag cap volumes. ;

[0084] This invention provides technical parameters and solutions for welding slag bags suitable for collecting copper slag; the provided welding slag bag technical solution is 10-15% lighter than traditional casting slag bags while meeting the operating conditions; this solution's welding slag bag replaces the traditional casting slag bag, which has significant economic and social benefits.

[0085] This application applies to the technical solution for welding slag ladles used to collect copper slag; the angle between the generatrix of the rotating cylinder and the center line of rotation of the cylinder ranges from 11.5° to 21°; the volume for collecting copper slag is... When welding slag bales, the thickness of the cylinder body is 70-100mm, and the thickness of the bottom of the bales is 80-120mm; the applicable range of the cylinder busbar length is 1500-3150mm.

[0086] In summary, this invention aims to address the technical problems commonly found in the copper smelting industry, such as insufficient structural strength, high tendency to hot cracking, low slag removal efficiency, short lifespan, poor maintainability, and the lack of a complete set of structural parameter systems adapted to the characteristics of copper slag under high temperature and heavy load conditions. By introducing a welded structural system, optimizing material properties, clarifying the range of key geometric and thickness parameters, and combining simulation verification and weld quality control, this invention achieves a solution that meets the requirements of copper slag. A welded slag bag structure solution that meets the requirements of volume, high-temperature copper slag collection, and efficient slag disposal improves overall reliability, operational efficiency, and life cycle performance.

[0087] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. A welding slag ladle for collecting copper slag, comprising a cylindrical body (1), a ladle bottom (5), a load-bearing component, a supporting component, and a slag-pouring component, wherein the cylindrical body (1) and the ladle bottom (5) are formed by welding plates, characterized in that: The cylinder (1) is provided with an inclined cylinder generatrix relative to the cylinder axis, and the angle β between the cylinder generatrix and the cylinder centerline is 11.5°~21°. The plate thickness of the cylinder (1) is 70-100mm high temperature resistant structural plate, and the plate thickness of the bottom (5) is 80-120mm. The applicable length of the cylinder busbar is 1500~3150mm.

2. The welding slag bag for collecting copper slag as described in claim 1, characterized in that, The cylinder (1) is formed from rolled sheet with a surface roughness of no more than 25 μm.

3. The welding slag bag for collecting copper slag as described in claim 1, characterized in that, The weld joint between the bottom (5) and the cylinder (1) is a full penetration structure, and the weld is screened by non-destructive testing.

4. The welding slag bag for collecting copper slag as described in claim 1, characterized in that, The supporting components include legs (6) located at the bottom (5) of the slag bag, which are used to maintain the overall stability of the slag bag during the slag loading and cooling stages.

5. A welding slag bag for collecting copper slag as described in claim 1, characterized in that, The supporting components and slag-pouring components include stiffening plates (4) and trunnions (2) arranged circumferentially along the outer side of the cylinder (1).

6. A welding slag bag for collecting copper slag as described in any one of claims 1-5, characterized in that, The volume range of the slag bag is .

7. A welding slag bag for collecting copper slag as described in any one of claims 1-5, characterized in that, The cylinder (1) is formed from rolled sheet with a surface roughness of 12.5 μm.

8. A design method for a welding slag bag for collecting copper slag, used to implement the welding slag bag for collecting copper slag as described in any one of claims 1-5, characterized in that, Includes the following steps: S1, based on the copper smelting working conditions parameters, obtain the slag ladle design load, slag temperature, target volume and slag dumping method; S2, based on the material database, select high-temperature resistant structural plates that meet the requirements of high-temperature strength, thermal stability and welding performance, and determine the plate types of the cylinder (1) and the bottom (5); S3, through structural mechanics simulation, the thickness of the cylinder (1) and the thickness of the bottom (5) are determined so that the maximum working stress is lower than the allowable stress of the material and the overall deformation limit is met; S4. Determine the cylinder generatrix inclination angle β based on the slag removal conditions after cooling, so as to minimize the slag discharge resistance. S5. Based on the simulation analysis results, set the size and arrangement of the stiffener (4), trunnion (2), and support leg (6) to form a welding structure that meets the requirements of thermal cycling and mechanical load, and obtain the structural design scheme of the welding slag bag.

9. The design method of a welding slag bag for collecting copper slag as described in claim 8, characterized in that, The slag bag is simulated by at least high temperature load, tipping stress, thermal cycle stress and deformation to determine the structural parameters of the cylinder (1), bottom (5), stiffening plate (4), trunnion (2), bearing components, supporting components and slag pouring components.

10. The design method of a welding slag bag for collecting copper slag as described in claim 8, characterized in that, In step S3, by... A parameterized model of the slag bag with a volume range is established to realize the automated linkage design of the cylinder thickness, bottom thickness, diameter and cylinder length. The included angle β between the cylinder generatrix and the cylinder center line is 11.5°~21°. The plate thickness of the cylinder (1) is 70~100mm of high temperature resistant structural plate, and the plate thickness of the bottom (5) is 80~120mm. The applicable range of cylinder generatrix length is 1500~3150mm.

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