External thermal insulation structure of submerged arc furnace

Abstract

The utility model discloses an external thermal insulation structure of a submerged arc furnace, which belongs to the technical field of external thermal insulation of furnaces and is characterized in that a filling bin is arranged on the outer wall of each inner arc-shaped frame, an external arc-shaped plate is arranged at a bin opening of each filling bin, a plurality of thermal insulation filling strips are arranged in each filling bin, and a high-temperature-resistant anti-slip gasket is arranged between every two adjacent inner arc-shaped frames. Wherein one modular heat preservation structure is provided with a notch matched with the access door. According to the modularized heat preservation structure, the hoops with the L-shaped cross sections are matched with the bolts and the nuts, the round holes are in butt joint with the protruding columns, rapid mounting and dismounting are achieved, the process is simplified, cost is reduced, and efficiency is improved. The module can be independently replaced when damaged, material waste is reduced, and economic benefits are improved. The filling bin is arranged inside, so that heat-insulating materials are convenient to replace and supplement, uniform distribution and fixation are guaranteed, and the heat-insulating effect is improved. And measures such as a high-temperature-resistant rubber ring, an anti-skid gasket and a sealing strip are adopted, so that heat leakage and high-temperature erosion are prevented, and stable operation of the submerged arc furnace is ensured.

Description

Technical Field

[0001] This utility model relates to the field of furnace external insulation technology, and in particular to an external insulation structure for a submerged arc furnace. Background Technology

[0002] The external insulation structure of a submerged arc furnace is an indispensable part of its design, playing a significant role in improving furnace thermal efficiency, reducing energy consumption, and extending service life. The core of this structure lies in the effective combination of multiple layers of materials to achieve efficient heat retention and comprehensive protection of the furnace body.

[0003] The external insulation structure of an electric arc furnace consists of three layers: a refractory layer, an insulation layer, and a protective layer. The refractory layer, acting as the first line of defense against high temperatures, uses high-refractory materials such as carbonaceous and magnesia materials to ensure stability and reliability even at high temperatures. The insulation layer follows closely behind, utilizing materials with low thermal conductivity and excellent insulation properties, such as insulation blocks and refractory fibers, to effectively reduce heat loss and improve smelting efficiency. The outermost protective layer bears the heavy responsibility of resisting external environmental corrosion and is made of robust materials such as metal plates and refractory bricks to ensure the integrity and durability of the insulation structure.

[0004] The complex, multi-layered design of the external insulation structure of electric arc furnaces also presents challenges for disassembly and replacement. Repairing, upgrading, or replacing the insulation layer requires disassembly and reinstallation layer by layer, which not only increases workload but also raises operational difficulty. Especially during disassembly, the protective layer must be removed with care to avoid damaging the internal insulation layer. Furthermore, the adhesive and integral nature of the insulation material makes the disassembly process time-consuming and labor-intensive. When installing a new insulation structure, precise measurement, cutting, and fixing of each layer of material are essential to ensure that the insulation effect meets design requirements.

[0005] The maintenance and management of the external insulation structure of the electric arc furnace requires high attention and meticulous operation. By adopting advanced construction techniques and strict quality control measures, the stability and durability of the insulation structure can be ensured, providing a strong guarantee for the efficient operation of the electric arc furnace. Utility Model Content

[0006] The main objective of this invention is to provide an external insulation structure for a submerged arc furnace, which can effectively solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0008] An external insulation structure for a submerged arc furnace is provided, applied to the furnace body. An inspection door is located on the side wall of the furnace body and connected to it via a hinge and locking mechanism.

[0009] The outer cover of the furnace body has multiple modular insulation structures. These multiple modular insulation structures are designed in a ring and are fitted onto the furnace body. The upper and lower ends of the modular insulation structures are fitted with a second sleeve and a first sleeve, and the modular insulation structures can be quickly disassembled and assembled through the first sleeve and the second sleeve.

[0010] The modular insulation structure includes multiple inner arc-shaped frames. Multiple inner arc-shaped frames are fitted on the outside of the furnace body. Each inner arc-shaped frame has a filling chamber on its outer wall, and an outer arc-shaped plate is provided at the opening of the filling chamber. Multiple insulation filling strips are provided inside the filling chamber. High-temperature resistant anti-slip pads are provided between two adjacent inner arc-shaped frames. One of the modular insulation structures has a notch adapted to the maintenance door.

[0011] As a further preferred embodiment of this application, the cross-section of the first sleeve and the second sleeve is designed in an "L" shape, and the first sleeve and the second sleeve are clamps, and the opening is fixed by bolts and nuts. The inner walls of the first sleeve and the second sleeve are provided with high temperature resistant rubber rings.

[0012] As a further preferred embodiment of this application, the upper and lower ends of the four modular insulation structures are provided with round holes, and the inner walls of the first sleeve and the second sleeve are provided with protruding columns. The protruding columns are inserted into the round holes of the modular insulation structures, and the modular insulation structures can be quickly disassembled and assembled through the protruding columns.

[0013] As a further preferred embodiment of this application, the outer arc plate is designed in a "C" shape, the outer arc plate is adapted to the inner arc frame, the contact end of the inner arc frame and the outer arc plate is provided with a rubber strip, and the inner arc frame is bonded to a high-temperature resistant anti-slip pad.

[0014] As a further preferred embodiment of this application, the notches in the inner arc frame, the outer arc plate, and the thermal insulation filling strip are aligned, and a high-temperature resistant sealing strip is provided between the notch and the inspection door;

[0015] As a further preferred embodiment of this application, the thermal insulation filling strip is designed in a long strip shape, and the thermal insulation filling strip is any one of ceramic fiber blanket, silicon carbide fiber, glass wool, rock wool, and expanded perlite.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] In this invention, the modular insulation structure utilizes a unique "L"-shaped cross-section design with clamps, bolts, and nuts, as well as precise alignment of round holes and protruding columns, enabling rapid installation and disassembly. This design simplifies the complex installation process of traditional insulation structures, reduces maintenance time and labor costs, and improves work efficiency.

[0018] When a module is damaged or needs replacement, the entire insulation layer can be replaced without removing the entire module. Replacement can be easily completed by operating on the specific module. This not only reduces maintenance difficulty but also minimizes material waste associated with replacing the entire module, thus improving economic efficiency.

[0019] Furthermore, the modular insulation structure features dedicated filling compartments for storing insulation material. This design makes replacing and replenishing the insulation material exceptionally convenient, allowing for continuous improvement in insulation performance without damaging the insulation layer structure. Simultaneously, the filling compartment design ensures uniform distribution and effective fixation of the insulation material, further enhancing the insulation effect.

[0020] By adding high-temperature resistant rubber rings to the inner wall of the sleeve, bonding high-temperature resistant anti-slip pads between modules, and taking high-temperature resistant sealing strips, heat leakage and high-temperature erosion are effectively prevented, ensuring the stable operation of the electric arc furnace in harsh working environments.

[0021] The modular insulation structure design also considers the ease of use of the access door. By creating notches on the modules to match the access door and adding high-temperature resistant sealing strips, the opening and closing of the access door is convenient while ensuring insulation and sealing effects during maintenance. This design reflects thorough consideration and meticulous planning for the daily maintenance of the submerged arc furnace. Attached Figure Description

[0022] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0023] Figure 2 This is a side view of the overall structure of this utility model;

[0024] Figure 3 This is a schematic diagram of the modular insulation structure and sleeve of this utility model;

[0025] Figure 4 This is an exploded view of the modular insulation structure and the sleeve of this utility model;

[0026] Figure 5 for Figure 4 Enlarged diagram of point A in the middle.

[0027] In the diagram: 1. Furnace body; 2. Inspection door; 3. First hoop; 4. Second hoop; 5. Modular insulation structure; 51. Inner arc frame; 52. Filling chamber; 53. Outer arc plate; 54. Insulation filling strip; 55. High temperature resistant anti-slip pad; 56. Notch. Detailed Implementation

[0028] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0029] like Figure 1 - Figure 5 As shown, an external insulation structure for a submerged arc furnace is applied to the furnace body 1. The inspection door 2 is located on the side wall of the furnace body 1 and is connected to it through a hinge device and a locking device to ensure the stability and safety of the structure.

[0030] Surrounding the exterior of the furnace body 1 is a series of meticulously designed modular insulation structures 5. These structures are elegantly fitted onto the furnace body 1 in a ring layout, not only improving the overall insulation performance but also providing the structure with a high degree of flexibility and maintainability. At the upper and lower ends of the modular insulation structure 5, a first clamp 3 and a second clamp 4 are cleverly configured. Both clamps feature a unique "L"-shaped cross-section design and function as clamps, achieving a secure fixation at the opening through the tight fit of bolts and nuts. Particularly noteworthy is the addition of high-temperature resistant rubber rings to the inner walls of the first clamp 3 and the second clamp 4 to further enhance sealing and high-temperature resistance.

[0031] The internal structure of the modular insulation structure 5 is equally ingenious. It consists of multiple inner arc-shaped frames 51 that fit snugly against the external contours of the furnace body 1. Each inner arc-shaped frame 51 has cleverly designed filling chambers 52 on its outer wall, specifically designed for the insulation material. At the opening of each filling chamber 52, carefully placed outer arc-shaped plates 53 are fitted. These plates are C-shaped, perfectly fitting the inner arc-shaped frames 51, and secured with rubber strips to ensure a tight fit and seal. Furthermore, high-temperature resistant anti-slip pads 55 are bonded between the inner arc-shaped frames 51 and the outer arc-shaped plates 53 to further enhance the structure's stability and safety.

[0032] We specifically created a notch 56 on one of the modular insulation structures 5 to match the access door 2. This design not only facilitates the opening and closing of the access door 2, but also adds a high-temperature resistant sealing strip between the notch 56 and the access door 2 to ensure good insulation and sealing performance during maintenance.

[0033] We also put a lot of effort into the selection of insulation materials. The insulation filler strip 54 adopts a long strip design and is filled with any one of the following high-quality materials: ceramic fiber blanket, silicon carbide fiber, glass wool, rock wool, and expanded perlite. These materials not only have excellent thermal insulation performance, but also effectively resist the erosion of high-temperature environments.

[0034] The top and bottom ends of the four modular insulation structures 5 are cleverly designed with round holes, while the inner walls of the first sleeve 3 and the second sleeve 4 are equipped with corresponding protruding posts. These protruding posts can be precisely inserted into the round holes of the modular insulation structures 5, thereby enabling quick disassembly and flexible replacement of the modular insulation structures 5. This design not only simplifies the maintenance process but also greatly improves work efficiency.

[0035] Disassembly and Assembly Process: Ensure the electric arc furnace is shut down and the furnace body 1 is within a safe temperature range. Prepare necessary tools, including wrenches, screwdrivers, and rubber mallets. Open the locking device of the maintenance door 2, and gently open the maintenance door 2 using the hinge mechanism, ensuring safe removal. Use a wrench to loosen the bolts and nuts on the first and second clamps 3 and 4, and carefully remove these two clamps, taking care not to damage the high-temperature resistant rubber rings. Gently pry the upper and lower ends of the modular insulation structure 5 to separate it from the furnace body 1. Maintain a smooth operation to avoid damaging the insulation structure. Remove each modular insulation structure 5 from the furnace body 1, taking care to maintain its integrity for future reuse or replacement. Clean the outer wall of the furnace body 1 to remove attached dust and debris. Inspect the furnace body 1 and the modular insulation structure 5 for integrity, and record the parts that need to be replaced or repaired.

[0036] Replacement Process: Prepare a new insulation structure according to the specifications and quantity of the modular insulation structure 5 to be replaced. Ensure that the new modular insulation structure 5 is pre-installed with insulation filler strips 54 and check its sealing. Align the new modular insulation structure 5 with the outer wall of the furnace body 1 and place it gently. Secure the modular insulation structure 5 to the furnace body 1 by matching the round holes with the protruding columns; use a wrench to tighten the bolts and nuts of the first sleeve 3 and the second sleeve 4 to ensure that the modular insulation structure 5 is stable and not loose. Align the inspection door 2 with the side wall notch 56 of the furnace body 1 and restore its position using the hinge and locking devices. Ensure that the inspection door 2 is tightly closed and the locking devices are secure and reliable. Conduct a comprehensive inspection of the entire external insulation structure of the electric arc furnace to ensure that all components are installed correctly and sealed well. Start the electric arc furnace for preliminary testing and observe the insulation effect and structural stability. The disassembly, assembly, and replacement process of the external insulation structure of the electric arc furnace can be completed. This process not only ensures the insulation performance of the electric arc furnace but also improves its maintainability and flexibility.

[0037] It should be noted that, in this document, relational terms such as first and second (number one, number two), etc., are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0038] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. An external insulation structure for a submerged arc furnace, applied to the furnace body (1), wherein an inspection door (2) is located on the side wall of the furnace body (1) and connected to it via a hinge device and a locking device, characterized in that: The furnace body (1) has multiple modular insulation structures (5) on its outer cover. These multiple modular insulation structures (5) are designed in a ring and are fitted onto the furnace body (1). The upper and lower ends of the modular insulation structure (5) are fitted with a second sleeve (4) and a first sleeve (3). The modular insulation structure (5) can be quickly disassembled and assembled through the first sleeve (3) and the second sleeve (4). The modular insulation structure (5) includes multiple inner arc-shaped frames (51). Multiple inner arc-shaped frames (51) are fitted on the outside of the furnace body (1). Each inner arc-shaped frame (51) has a filling chamber (52) on its outer wall, and an outer arc-shaped plate (53) is provided at the opening of the filling chamber (52). Multiple insulation filling strips (54) are provided inside the filling chamber (52). High-temperature resistant anti-slip pads (55) are provided between two adjacent inner arc-shaped frames (51). One of the modular insulation structures (5) has a notch (56) adapted to the inspection door (2).

2. The external insulation structure for a submerged arc furnace according to claim 1, characterized in that: The first sleeve (3) and the second sleeve (4) have an "L" shaped cross-section. The first sleeve (3) and the second sleeve (4) are clamps and are fixed at the opening by bolts and nuts. The inner walls of the first sleeve (3) and the second sleeve (4) are provided with high temperature resistant rubber rings.

3. The external insulation structure for a submerged arc furnace according to claim 2, characterized in that: The four modular insulation structures (5) have round holes at their upper and lower ends. The inner walls of the first sleeve (3) and the second sleeve (4) are provided with protruding columns. The protruding columns are inserted into the round holes of the modular insulation structure (5) and the modular insulation structure (5) can be quickly assembled and disassembled through the protruding columns.

4. The external insulation structure for a submerged arc furnace according to claim 3, characterized in that: The outer arc plate (53) is designed in a "C" shape. The outer arc plate (53) is adapted to the inner arc frame (51). The contact ends of the inner arc frame (51) and the outer arc plate (53) are provided with rubber strips. The inner arc frame (51) is bonded to the high temperature resistant anti-slip pad (55).

5. The external insulation structure for a submerged arc furnace according to claim 4, characterized in that: The notches (56) in the inner arc frame (51), outer arc plate (53) and thermal insulation filling strip (54) are aligned, and a high-temperature resistant sealing strip is provided between the notch (56) and the inspection door (2).

6. The external insulation structure for a submerged arc furnace according to claim 5, characterized in that: The thermal insulation filling strip (54) is designed in a long strip shape, and the thermal insulation filling strip (54) is any one of ceramic fiber blanket, silicon carbide fiber, glass wool, rock wool and expanded perlite.

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