Intermediate tank sealing cover, thermal insulation assembly and method

Abstract

The invention provides an intermediate tank sealing cover, a heat preservation assembly and a method, and relates to the technical field of slag treatment equipment.The intermediate tank sealing cover comprises a supporting structure, a cover body structure and a driving mechanism, and a turnover mechanism is arranged on the supporting structure; the cover body structure comprises a supporting beam connected with the turnover mechanism, a top cover arranged on the supporting beam and a skirt cover arranged on the top cover, a heat insulation structure and a sealing structure are arranged on the top cover, the top cover can be used for covering the self-heat-preservation intermediate tank, and the sealing structure can be used for sealing the top cover and the self-heat-preservation intermediate tank; the driving mechanism is arranged on the supporting structure and connected with the turnover mechanism, and the driving mechanism is used for driving the turnover mechanism to drive the cover body structure to turn over. Aiming at the heat preservation problem in the air quenching method treatment process, the heat preservation problem of the molten slag is solved, the requirement of the air quenching method for the fluidity of the molten electric slag is effectively guaranteed, and an important technical support is provided for improving the treatment efficiency of the air quenching method.

Description

Technical Field

[0001] The present invention relates to the technical field of slag processing equipment, and in particular to a tundish sealing cover, a heat-insulating component and a method. Background Art

[0002] In recent years, steel slag production has exceeded 100 million tons, of which 75% is converter slag, while electric furnace slag accounts for only about 10%. Therefore, the steel industry has focused its solid waste management efforts on converter slag. Because the properties of electric furnace slag are similar to those of converter slag, its treatment processes are generally the same as those for converter slag. Currently, the main slag treatment processes that meet ultra-low emission requirements and have achieved industrial application include pool hot stuffing, pressurized hot stuffing, drum method, and air quenching.

[0003] The pool-type hot stuffing method and the pressurized hot stuffing method are among the most widely used steel slag treatment technologies, with a history dating back to the last century. The first generation of steel slag hot stuffing treatment technology was developed in 1992. Through continuous improvement and optimization, this technology has evolved to its fourth generation. The first three generations were the pool-type hot stuffing method, and the fourth generation is the pressurized hot stuffing method. These are currently the most economical steel slag treatment methods. The drum method first pours the steel slag into the drum at a certain flow rate. Under the action of centrifugal force, the slag breaks up and is flung toward the collector, where it undergoes heat exchange with the air in the cooling chamber. The drum method has the advantages of low emissions, a clean working environment, and high treatment efficiency. However, direct contact of the molten steel slag with the sprayed cooling water can cause violent explosions, damage equipment, and increase treatment costs. Furthermore, the molten steel slag has high fluidity requirements. The wind quenching method uses a gas medium (such as compressed air, oxygen, etc.) to quickly granulate and cool the steel slag. The process is simple and efficient, and can effectively recover the sensible heat of the steel slag. However, it is only suitable for processing molten steel slag with good fluidity. It cannot process steel slag with high viscosity and solid steel slag. The noise problem at the operation site is more prominent.

[0004] Since the slag produced by electric furnace smelting accounts for about 12% to 20% of crude steel production, and because the raw materials contain scrap steel, the iron content is high, the density is greater, and the main components are silicates and ferrites, the melting temperature is low, and the fluidity is better than that of converter slag, the above-mentioned processes are all well adapted. However, the slag discharge temperature of electric furnace slag can reach 1550℃, which is high-grade thermal energy. The pool-type hot stuffing method, pressurized hot stuffing method, and drum method cannot recover waste heat or have a low waste heat recovery rate. The air quenching method realizes gas-solid heat exchange during the air quenching process and is feasible for waste heat recovery. However, due to the relatively large gas slag, the temperature after air heat exchange cannot meet the waste heat recovery standard.

[0005] Each ton of hot electric furnace slag has a calorific value equivalent to 50kg of standard coal, and this calorific value is not currently being effectively utilized. In the engineering examples of treating electric furnace slag by the air quenching method currently in production, the molten part of the slag with good fluidity is quenched by air, while the slag shell and slag steel with poor fluidity are quenched by a combined process route of hot pouring. In this field, waste heat recovery is an inevitable direction for the research of new steel slag processes, and it is urgent to break through the bottleneck of existing technologies and develop mature and feasible market-oriented application technologies. Therefore, in the electric furnace slag air quenching process, how to improve the thermal insulation effect of the molten electric furnace slag to meet the fluidity requirements of the molten electric furnace slag by the air quenching method has become a technical problem that needs to be solved urgently. Summary of the Invention

[0006] In order to overcome the above-mentioned defects of the prior art, the technical problem to be solved by the embodiments of the present invention is to provide a tundish sealing cover, an insulation component and a method for improving the insulation effect of molten electric furnace slag.

[0007] The above-mentioned object of the present invention can be achieved by adopting the following technical solutions. The present invention provides a tundish sealing cover, comprising:

[0008] A supporting structure, wherein a turning mechanism is provided on the supporting structure;

[0009] a cover structure comprising a support beam connected to the turnover mechanism, a top cover disposed on the support beam, and a skirt cover disposed on the top cover, the top cover being provided with a heat insulating structure and a sealing structure, the top cover being capable of covering the self-insulating intermediate tank, and the sealing structure being capable of sealing the top cover and the self-insulating intermediate tank;

[0010] A driving mechanism is provided on the supporting structure and connected to the flipping mechanism, and is used for driving the flipping mechanism to drive the cover structure to flip.

[0011] In a preferred embodiment of the present invention, the heat insulation structure includes a top cover lining plate provided on the inner wall of the top cover and a heat insulation layer provided on the inner wall of the top cover lining plate.

[0012] In a preferred embodiment of the present invention, the inner wall of the top cover is provided with a plurality of spaced-apart connecting pins, and the top cover lining is formed on the inner wall of the top cover by castable refractory material.

[0013] In a preferred embodiment of the present invention, the castable refractory material is heat-resistant concrete.

[0014] In a preferred embodiment of the present invention, the sealing structure includes a heat-insulating sealing gasket provided on the annular side edge of the top cover liner, and the heat-insulating sealing gasket can be used to abut and seal against the tank mouth skirt of the self-insulating intermediate tank.

[0015] In a preferred embodiment of the present invention, the thermal insulation sealing gasket is formed by elastic refractory material.

[0016] In a preferred embodiment of the present invention, the elastic refractory material is a cotton gasket or asbestos packing, or a combination of the two.

[0017] In a preferred embodiment of the present invention, the cover structure further includes a reinforcement structure provided between the top cover and the skirt cover.

[0018] In a preferred embodiment of the present invention, the reinforcement structure includes a plurality of reinforcement ribs, which are arranged at intervals and connect the top cover and the skirt cover.

[0019] In a preferred embodiment of the present invention, the supporting structure includes a base and a bracket arranged on the base, the flipping mechanism includes a flipping axis arranged on the bracket, the flipping axis is provided with a first flipping portion and a second flipping portion arranged at a preset angle, the first flipping portion is connected to the cover structure, and the second flipping portion is hingedly connected to the driving mechanism.

[0020] In a preferred embodiment of the present invention, the driving mechanism includes a hydraulic push rod, a hydraulic cylinder of the hydraulic push rod is arranged on the base, and a hydraulic rod of the hydraulic push rod is hingedly connected to the second flipping part.

[0021] The present invention also provides a method for insulating molten slag using the aforementioned tundish sealing cover, comprising the following steps:

[0022] Step S1: Controlling the drive mechanism to retract to drive the flip mechanism to rotate, and pulling the cover structure to flip through the lever force of the flip mechanism, so that the cover structure is separated from the self-insulating intermediate tank, thereby opening the self-insulating intermediate tank;

[0023] Step S2: controlling the crane to lift the slag pot loaded with molten electric furnace slag, and pouring the molten electric furnace slag into the self-insulating intermediate pot to complete the slag transfer operation;

[0024] Step S3: Controlling the driving mechanism to extend to drive the flipping mechanism to rotate in the opposite direction, and using the lever force of the flipping mechanism to flip the cover structure, so that the cover structure and the self-insulating intermediate tank are closed; during the closing process, the annular side edge of the thermal insulation structure and the tank opening skirt of the self-insulating intermediate tank squeeze the sealing structure to achieve a seal between the slag intermediate tank sealing cover and the self-insulating intermediate tank;

[0025] Step S4: Repeat the operation process from step S1 to step S3 to achieve continuous heat preservation treatment of the molten electric furnace slag.

[0026] The technical solution of the present invention has the following significant beneficial effects:

[0027] The intermediate tank sealing cover described in the present invention can solve the insulation problem in the wind quenching treatment process, solve the insulation problem of molten slag, effectively guarantee the requirements of the wind quenching method for the fluidity of molten electric furnace slag, and provide important technical support for improving the treatment efficiency of the wind quenching method. In addition, the intermediate tank sealing cover described in the present invention does not emit pollutants during operation, meets the requirements of clean production, and provides an efficient and environmentally friendly technical solution for the slag treatment process. The method of the present invention is not only suitable for the insulation treatment of molten electric furnace slag, but can also be extended to other molten slags (such as steel slag and refined slag), and has wide application value and significant technical and economic benefits.

[0028] Specifically, the intermediate tank sealing cover utilizes the synergistic effect of the support structure, the flip mechanism, the cover structure, and the drive mechanism to achieve rapid opening and closing of the self-insulating intermediate tank, ensuring that the heat energy of the molten electric furnace slag is maintained during the pouring and storage process. In addition, the thermal insulation structure and sealing structure on the top cover further enhance the thermal insulation effect, avoiding the problem of reduced fluidity due to temperature drop, thereby meeting the strict requirements of the wind quenching method for the fluidity of the molten slag. In addition, by providing a skirt cover on the top cover, when the top cover and the self-insulating intermediate tank are closed, the skirt cover can squeeze the sealing structure and cover the joint between the top cover and the self-insulating intermediate tank, thereby effectively preventing heat loss and high-temperature gas leakage, further ensuring the thermal insulation effect of the molten electric furnace slag. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0030] The drawings described herein are for illustrative purposes only and are not intended to limit the scope of the present invention in any way. In addition, the shapes and proportional dimensions of the various components in the drawings are merely illustrative and are used to help understand the present invention, and are not intended to specifically limit the shapes and proportional dimensions of the various components of the present invention. Those skilled in the art can select various possible shapes and proportional dimensions to implement the present invention according to specific circumstances under the guidance of the present invention.

[0031] Figure 1 This is a structural schematic diagram of an embodiment of the present invention showing the intermediate tank sealing cover in an open position;

[0032] Figure 2 This is a structural schematic diagram of an embodiment of the present invention showing the intermediate tank sealing cover in a closed position;

[0033] Figure 3 This is a structural schematic diagram of an embodiment of the cover structure of the present invention;

[0034] Figure 4 for Figure 3 A schematic diagram of the partially enlarged structure at center A;

[0035] Figure 5 A side cross-sectional structural diagram of an embodiment of the self-insulating intermediate tank of the present invention;

[0036] Figure 6 This is a side structural diagram of an embodiment of the self-insulating intermediate tank of the present invention;

[0037] Figure 7 This is a side sectional structural diagram of an embodiment of the upper tooth surface and the lower tooth surface of the present invention.

[0038] Reference numerals in the above drawings:

[0039] 300, intermediate tank sealing cover;

[0040] 400, self-insulating intermediate tank;

[0041] 310, support structure; 311, base; 312, bracket;

[0042] 320, cover structure; 321, support beam; 322, top cover; 3221, connecting nails; 323, skirt cover; 324, thermal insulation structure; 3241, top cover lining; 3242, thermal insulation layer; 325, sealing structure; 3251, thermal insulation sealing gasket;

[0043] 330, driving mechanism; 331, hydraulic push rod;

[0044] 340, turning mechanism; 341, turning axis; 342, first turning portion; 343, second turning portion;

[0045] 350. Strengthening structure; 351. Strengthening ribs. DETAILED DESCRIPTION

[0046] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0047] Implementation Method 1

[0048] Please refer to Figures 1 to 4As shown, an embodiment of the present invention provides an intermediate tank sealing cover 300, which includes a supporting structure 310, a cover structure 320 and a driving mechanism 330. The supporting structure 310 is provided with a flipping mechanism 340; the cover structure 320 includes a supporting beam 321 connected to the flipping mechanism 340, a top cover 322 arranged on the supporting beam 321, and a skirt cover 323 arranged on the top cover 322, and the top cover 322 is provided with an insulation structure 324 and a sealing structure 325. The top cover 322 can be used to cover the self-insulating intermediate tank 400, and the sealing structure 325 can be used to seal the top cover 322 and the self-insulating intermediate tank 400; the driving mechanism 330 is provided on the supporting structure 310 and connected to the flipping mechanism 340, and the driving mechanism 330 is used to drive the flipping mechanism 340 to drive the cover structure 320 to flip.

[0049] Overall, the tundish sealing cover 300 addresses the thermal insulation challenges faced by molten slag during the wind quenching process, effectively ensuring the fluidity requirements of molten electric slag, and providing important technical support for improving wind quenching efficiency. Furthermore, the tundish sealing cover 300 emits no pollutants during operation, meeting clean production requirements and providing an efficient and environmentally friendly technical solution for slag treatment.

[0050] Specifically, if Figure 1 and Figure 2 In the embodiment shown, the intermediate tank sealing cover 300 utilizes the coordinated action of the support structure 310, the flipping mechanism 340, the cover structure 320 and the driving mechanism 330 to achieve rapid opening and closing of the self-insulating intermediate tank 400, thereby ensuring the heat energy retention effect of the molten electric furnace slag during the pouring and storage process.

[0051] Furthermore, the thermal insulation structure 324 and sealing structure 325 on the top cover 322 further enhance the thermal insulation effect, preventing the problem of reduced fluidity due to temperature drop, thereby meeting the strict fluidity requirements of the molten slag required by the wind quenching method. Furthermore, the skirt 323 provided on the top cover 322 compresses the sealing structure 325 and covers the joint between the top cover 322 and the self-insulating intermediate tank 400 when the top cover 322 and the self-insulating intermediate tank 400 are closed, thereby effectively preventing heat loss and high-temperature gas leakage, further ensuring the thermal insulation effect of the molten electric slag.

[0052] In the embodiment of the present invention, the designer can adjust the specific type of slag according to the use requirements, and no specific limitation is given here. For example, the slag includes but is not limited to molten electric furnace slag, molten steel slag or molten refined slag.

[0053] In an embodiment of the present invention, Figure 3 and Figure 4In the illustrated embodiment, the heat insulating structure 324 includes a top cover lining plate 3241 disposed on the inner wall of the top cover 322 and a heat insulating layer 3242 disposed on the inner wall of the top cover lining plate 3241 .

[0054] By arranging a top cover lining plate 3241 on the inner wall of the top cover 322 and further arranging a heat insulation layer 3242 on the inner wall of the top cover lining plate 3241 , a multi-layer heat insulation barrier is formed, which significantly improves the heat insulation performance of the intermediate tank sealing cover 300 .

[0055] Specifically, the top cover lining 3241 not only enhances structural strength but also effectively blocks high-temperature radiation. The thermal insulation layer 3242 further reduces heat conduction, ensuring that the temperature of the molten electric furnace slag in the self-insulating tundish 400 is maintained for a long time. This not only meets the slag fluidity requirements of the wind quenching method, but also reduces heat loss and improves energy efficiency.

[0056] In an embodiment of the present invention, Figure 4 In the illustrated embodiment, the inner wall of the top cover 322 is provided with a plurality of spaced-apart connecting pins 3221 , and the top cover lining plate 3241 is formed on the inner wall of the top cover 322 by a castable refractory material.

[0057] Designers can adjust the specific structure of the connecting nails 3221 according to their needs and are not specifically limited here. Preferably, the connecting nails 3221 are V-shaped nails. By providing a plurality of V-shaped nails arranged at intervals on the inner wall of the top cover 322, these V-shaped nails can effectively enhance the connection strength between the top cover lining plate 3241 and the inner wall of the top cover 322.

[0058] Specifically, the top cover lining 3241 is directly formed on the inner wall of the top cover 322 using castable refractory materials. The structural characteristics of the V-shaped nails are utilized to enable the casting material to be firmly embedded in the V-shaped nails during the solidification process, forming a mechanical bite effect, thereby significantly improving the anti-falling performance and overall structural stability of the top cover lining 3241. It not only simplifies the installation process, but also enhances the high temperature resistance and service life of the lining, ensuring long-term stable operation in high temperature environments, while avoiding the loosening or falling problems that may occur in traditional fixing methods, and providing reliable thermal insulation protection for molten slag treatment.

[0059] The designer can adjust the specific type of the castable refractory material according to the use requirements, and no specific limitation is made here. Preferably, the castable refractory material is heat-resistant concrete.

[0060] Heat-resistant concrete offers excellent high-temperature stability, wear resistance, and thermal insulation. It maintains structural integrity over extended periods in high-temperature environments, effectively resisting the high-temperature radiation and thermal shock generated by molten slag while reducing heat transfer to the external structure. This significantly extends the service life and thermal insulation of the top cover liner 3241.

[0061] In addition, the good fluidity and adhesion of heat-resistant concrete enable it to fully fill the gaps between the V-shaped nails on the inner wall of the top cover 322, forming a stable mechanical bite connection, further enhancing the bonding strength between the liner and the top cover 322, ensuring the reliable operation of the equipment under harsh working conditions, reducing maintenance costs and improving safety.

[0062] In an embodiment of the present invention, Figure 4 In the illustrated embodiment, the sealing structure 325 includes a heat-insulating sealing gasket 3251 provided on the annular side edge of the top cover liner 3241 . The heat-insulating sealing gasket 3251 can be used to abut and seal against the tank mouth skirt of the self-insulating intermediate tank 400 .

[0063] By providing a thermal insulation sealing gasket 3251 on the annular side edge of the top cover liner 3241, the thermal insulation sealing gasket 3251 can tightly abut and seal against the skirt edge of the self-insulating intermediate tank 400. The thermal insulation sealing gasket 3251 effectively isolates the leakage of high-temperature gas and the ingress of external cold air, reducing heat loss, ensuring the temperature stability of the molten electric furnace slag, and thus improving the thermal insulation effect.

[0064] In one embodiment, the thermal insulation sealing gasket 3251 is formed from an elastic refractory material. By using this material, the thermal insulation sealing gasket 3251 exhibits excellent resilience and high-temperature resistance when under pressure, enabling it to maintain a long-term seal even under harsh operating conditions. It also cushions mechanical impact between the top cover liner 3241 and the tank opening skirt, extending the service life of the equipment.

[0065] The designer can adjust the specific material of the elastic refractory material according to the use requirements, and no specific limitation is made here. Preferably, the elastic refractory material is a cotton gasket or asbestos packing, or a combination of the two.

[0066] In one embodiment, the resilient refractory material is a cotton gasket. In another embodiment, the resilient refractory material is an asbestos packing. In yet another embodiment, the resilient refractory material is a combination of a cotton gasket and an asbestos packing.

[0067] Asbestos gaskets and packings form a tight seal when under pressure while maintaining excellent resilience after pressure release. This effectively prevents high-temperature gas from leaking through the gap between the top cover liner 3241 and the skirt of the self-insulating intermediate tank 400, ensuring both sealing and thermal insulation. Furthermore, the combination of these two materials allows for flexible adjustment of sealing performance based on actual operating conditions, further enhancing the equipment's stability and reliability in complex environments, extending the service life of the sealing structure 325, and reducing maintenance frequency and costs.

[0068] In an embodiment of the present invention, Figure 3 In the illustrated embodiment, the cover structure 320 further includes a reinforcement structure 350 disposed between the top cover 322 and the skirt cover 323 .

[0069] The reinforcement structure 350 provided between the top cover 322 and the skirt cover 323 significantly enhances the mechanical strength and stability of the entire cover. This structure effectively disperses and withstands external forces and thermal stresses caused by the high internal temperature environment, preventing deformation or cracking at the connection between the top cover 322 and the skirt cover 323 due to prolonged high temperatures and vibration. This optimizes the overall force distribution of the cover, extending its service life and ensuring consistent sealing and thermal insulation during the molten electric furnace slag processing process, thereby improving safety.

[0070] The designer can adjust the specific structure of the reinforcement structure 350 according to the use requirements, and no specific limitation is given here. Preferably, the reinforcement structure 350 includes a plurality of reinforcement ribs 351, which are arranged at intervals and connect the top cover 322 and the skirt cover 323.

[0071] The multiple reinforcing ribs 351 effectively disperse stress concentration at the junction of the top cover 322 and the skirt cover 323. They also enhance the cover's stability under high-temperature, high-pressure, and vibration conditions, preventing structural damage from uneven thermal expansion or external impact. Furthermore, the multiple reinforcing ribs 351 optimize the weight distribution of the cover structure 320, ensuring it meets strength requirements while remaining lightweight and facilitating installation and maintenance.

[0072] In an embodiment of the present invention, Figure 1 and Figure 2 In the embodiment shown, the support structure 310 includes a base 311 and a bracket 312 arranged on the base 311, and the flip mechanism 340 includes a flip axis 341 arranged on the bracket 312, and the flip axis 341 is provided with a first flip portion 342 and a second flip portion 343 arranged at a preset angle, the first flip portion 342 is connected to the cover structure 320, and the second flip portion 343 is hingedly connected to the driving mechanism 330.

[0073] The base 311 and bracket 312 cooperate to form a stable support system, ensuring stability in use. Furthermore, by providing a first flip portion 342 and a second flip portion 343 on the flip shaft 341 and arranging the first flip portion 342 and the second flip portion 343 at a predetermined angle, the first flip portion 342 and the second flip portion 343 form a lever structure, facilitating flexible control of the flipping movement of the cover structure 320.

[0074] Specifically, the first flip part 342 is connected to the cover structure 320 and is responsible for driving it to perform precise flipping operations; the second flip part 343 is hingedly connected to the driving mechanism 330, and can efficiently transmit the power of the driving mechanism 330 to the flip axis 341, thereby realizing precise positioning of the cover structure 320 in different working states.

[0075] In an embodiment of the present invention, Figure 1 and Figure 2 In the illustrated embodiment, the driving mechanism 330 includes a hydraulic push rod 331 . The hydraulic cylinder of the hydraulic push rod 331 is disposed on the base 311 , and the hydraulic rod of the hydraulic push rod 331 is hingedly connected to the second flip portion 343 .

[0076] Specifically, the hydraulic cylinder of the hydraulic push rod 331 is rotatably mounted on the base 311, and the hydraulic rod of the hydraulic push rod 331 is hingedly connected to the second tilting portion 343. This provides powerful driving force and precise tilting control. The hydraulic push rod 331, with the base 311 as a fulcrum, ensures stable and reliable force transmission. The hinged connection allows the hydraulic rod to swing freely within a certain angle range, adapting to the motion trajectory of the tilting axis 341 and avoiding stress concentration or damage that could result from a rigid connection.

[0077] In addition, the hydraulic push rod 331 has the characteristics of strong load adaptability and smooth movement. It can adjust the thrust size and speed according to actual working conditions to ensure a smooth transition of the cover structure 320 during the flipping process, reducing impact and vibration. It not only improves the stability of equipment operation, but also simplifies the maintenance process, extends the service life of components, and meets the needs of industrial sites for efficient and reliable operation.

[0078] Implementation Method 2

[0079] An embodiment of the present invention provides a heat preservation assembly, including a self-insulating intermediate tank 400 and the intermediate tank sealing cover 300 as described in the first embodiment. The intermediate tank sealing cover 300 can be used to seal the self-insulating intermediate tank 400.

[0080] In the embodiments of the present invention, please refer to Figures 5 to 7 As shown, the self-insulating intermediate tank 400 includes a tank shell 410 and a slag hanging mechanism 420. The top of the tank shell 410 is provided with an opening 411, and the bottom of the tank shell 410 is provided with a slag lowering port 412; the slag hanging mechanism 420 includes a first slag hanging structure 421 arranged on the inner wall of the tank shell 410, and a second slag hanging structure 422 arranged on the bottom of the tank shell 410. The first slag hanging structure 421 is used to allow part of the molten slag to solidify on the inner wall of the tank shell 410, and the second slag hanging structure 422 is used to allow part of the molten slag to solidify on the bottom of the tank shell 410.

[0081] On the whole, the self-insulating intermediate tank 400 achieves the dual effects of protecting the tank shell 410 and insulating the slag through the coordinated cooperation between the tank shell 410 and the slag hanging mechanism 420, thereby solving the insulation problem of the molten electric furnace slag in the electric furnace slag wind quenching process, and has the advantages of high efficiency, energy saving, and environmental protection, providing reliable technical support for industrial production in related fields.

[0082] Specifically, the first slag structure 421 and the second slag structure 422 in the slag hanging mechanism 420 are respectively arranged on the inner wall of the tank shell 410 and the tank bottom. Part of the molten electric furnace slag can solidify to form a solid slag shell after contacting the first slag structure 421 and the second slag structure 422. The solid slag shell not only provides thermal insulation protection for the tank shell 410, but also effectively reduces the heat loss in the tank shell 410, thereby extending the fluidity time of the molten electric furnace slag and meeting the requirements of the wind quenching process.

[0083] Furthermore, by controlling the opening and closing of the tundish sealing cover 300 and combining it with the process of pouring molten electric furnace slag from a crane, the pre-storage and continuous discharge of molten slag from multiple tanks is achieved, ensuring that the slag intake and discharge volumes per unit time match, thereby improving production efficiency. Furthermore, the self-insulating tundish 400, which is invented, naturally forms a protective lining with solidified slag during use, significantly extending the service life of the tank shell 410. Any slag sticking can be cleared by dumping, making it easy to operate and low-maintenance.

[0084] In the embodiment of the present invention, the designer can adjust the specific type of slag according to the use requirements, and no specific limitation is given here. For example, the slag includes but is not limited to molten electric furnace slag, molten steel slag or molten refined slag.

[0085] In an embodiment of the present invention, Figure 5 and Figure 7 In the illustrated embodiment, the first slag structure 421 includes a stepped structure disposed from top to bottom on at least a portion of the inner wall of the tank shell 410 . The stepped structure is used to allow a portion of the molten slag to solidify on the inner wall of the tank shell 410 .

[0086] By providing a stepped structure on the inner wall of the tank shell 410, part of the molten slag can be effectively promoted to solidify on the surface of the stepped structure to form a solid slag shell, which fully utilizes the physical properties of the molten slag and makes the solidified slag shell tightly adhere to the stepped structure. This not only enhances the thermal insulation protection effect of the inner wall of the tank shell 410, but also significantly improves the thermal insulation performance of the tank shell 410, reduces heat loss, and thus prolongs the fluidity time of the molten slag, which can better meet the requirements of the subsequent wind quenching process.

[0087] Furthermore, the stepped structure increases the slag collection area and improves slag collection efficiency. The resulting solid slag shell can continuously protect the tank shell 410 during repeated use, reducing wear on the tank shell 410 and extending the service life of the equipment. Furthermore, if the solid slag shell is damaged, molten slag can quickly fill the defective area, thus ensuring the reproducibility and structural stability of the solid slag shell.

[0088] In an embodiment of the present invention, Figure 6 In the embodiment shown, the stepped structure includes a plurality of upper tooth surfaces 4211 and a plurality of lower tooth surfaces 4212 arranged in an alternating manner. From the side wall of the tank shell 410 to the middle of the tank shell 410, the upper tooth surfaces 4211 are inclined upward at a preset angle α; the lower tooth surfaces 4212 are extended along the height direction.

[0089] A tooth-like stepped structure is formed by staggered upper tooth surfaces 4211 and lower tooth surfaces 4212, wherein the upper tooth surface 4211 is tilted upward at a preset angle α, while the lower tooth surface 4212 extends in the height direction. This arrangement can significantly improve the slag hanging effect of the molten slag on the inner wall of the tank shell 410.

[0090] Furthermore, by tilting the upper tooth surface 4211 upward at a predetermined angle α, the upper tooth surface 4211 can serve as a support surface for the solid slag shell, preventing it from falling and improving its wall-hanging stability. Furthermore, when the tank shell 410 is flipped to remove the solid slag shell, the solid slag shell can quickly break away from the upper tooth surface 4211, improving slag removal efficiency.

[0091] Designers can adjust the specific size of the preset angle α according to the needs of use, and no specific restrictions are made here. Figure 3 In the embodiment shown, the preset angle α is 5° to 15°. In one embodiment, the preset angle α is 5°. In another embodiment, the preset angle α is 10°. In yet another embodiment, the preset angle α is 15°.

[0092] The preset inclination angle of the upper tooth surface 4211 is set within a range of 5° to 15°, ensuring smooth slag flow while optimizing slag attachment on the stepped structure. Specifically, this angle range effectively guides the molten slag to flow upward along the inner sidewall of the tank shell 410 and solidify, forming a uniform and solid slag shell, while also preventing insufficient slag attachment due to a too small angle or obstruction of slag flow due to an excessively large angle.

[0093] In an embodiment of the present invention, Figure 5 In the embodiment shown, the slag outlet 412 is arranged at the center of the tank bottom of the tank shell 410, and the second slag hanging structure 422 includes a slag hanging groove 4221 arranged around the outer periphery of the slag outlet 412. Along the radial direction of the tank shell 410, the bottom of the slag hanging groove 4221 gradually rises from the middle to both sides to form an arc shape.

[0094] By gradually raising the bottom of the slag trough 4221 from the center toward the sides to form an arc shape, the molten slag can be effectively slag-free on the bottom of the tank. Furthermore, when the tank shell 410 is turned over to remove the solid slag crust, the solid slag crust can quickly escape from the arc-shaped slag trough 4221, thereby improving slag removal efficiency.

[0095] Specifically, the arc-shaped slag groove 4221 can guide the molten slag to flow preferentially to the slag groove 4221 and solidify there to form a solid slag shell, which not only provides good thermal insulation protection for the bottom of the tank, but also significantly reduces heat loss from the bottom of the tank and prolongs the insulation time of the molten electric furnace slag.

[0096] Furthermore, if the solid slag shell at the bottom of the tank is damaged, the molten slag can quickly fill the defective area, thus ensuring the reproducibility and structural stability of the solid slag shell. Furthermore, the annular layout of the slag trough 4221 ensures uniform slag distribution, enhancing the overall strength and wear resistance of the tank bottom structure, thereby extending the service life of the equipment.

[0097] In an embodiment of the present invention, Figure 5 and Figure 6 In the illustrated embodiment, the self-insulating intermediate tank 400 further includes a tank support structure 430 . The tank support structure 430 includes a first tank support 431 and a second tank support 432 symmetrically arranged on the outer wall of the tank shell 410 .

[0098] By arranging the symmetrically distributed first tank support 431 and the second tank support 432 on the outer wall of the tank shell 410, it is convenient to support the self-insulating intermediate tank 400 during vehicle transportation, thereby improving the transportation stability of the self-insulating intermediate tank 400.

[0099] Designers can adjust the specific structures of the first and second tank supports 431, 432 based on actual needs and are not specifically limited here. Preferably, the first tank support 431 has a horizontally disposed first supporting end surface, and the second tank support 432 has a horizontally disposed second supporting end surface. The first and second supporting end surfaces are coplanar, and the cooperation between the first and second supporting end surfaces provides better support for the self-insulating intermediate tank 400.

[0100] In an embodiment of the present invention, Figure 5 and Figure 6 In the illustrated embodiment, the self-insulating intermediate tank 400 further includes a trunnion assembly 440 . The trunnion assembly 440 includes a first trunnion 441 detachably disposed on the tank shell 410 , and a second trunnion 442 detachably disposed on the tank shell 410 .

[0101] In a specific embodiment, the first ear shaft 441 and the second ear shaft 442 are symmetrically arranged, and the first tank support 431 and the second tank support 432 are respectively arranged below the first ear shaft 441 and the second ear shaft 442.

[0102] The first ear shaft 441 and the second ear shaft 442 cooperate with each other to facilitate better flipping of the self-insulating intermediate tank 400 by using external equipment, thereby achieving a flexible adjustment of the position of the self-insulating intermediate tank 400.

[0103] Furthermore, the detachable design facilitates the individual replacement or repair of the first trunnion 441 or the second trunnion 442, preventing the entire self-insulating intermediate tank 400 from being scrapped due to trunnion damage, thereby reducing operating costs. Furthermore, the detachable design improves the compatibility between the trunnion assembly 440 and the tank shell 410, allowing for quick replacement of the trunnion assembly 440 with the required specifications based on varying operating conditions.

[0104] In an embodiment of the present invention, Figure 5 and Figure 6 In the illustrated embodiment, the self-insulating intermediate tank 400 further includes a support structure 450 disposed at the bottom of the tank shell 410. The support structure 450 comprises a plurality of spaced-apart legs 451. The provision of these spaced-apart legs 451 at the bottom of the tank shell 410 effectively enhances the stability and load-bearing capacity of the tank shell 410, preventing deformation or damage caused by localized excessive force. Furthermore, the spaced-apart arrangement of the legs 451 provides good ventilation at the bottom of the tank, helping to reduce heat accumulation at the bottom.

[0105] In an embodiment of the present invention, Figure 6 In the illustrated embodiment, the self-insulating intermediate tank 400 further includes a lifting structure 460 comprising two lifting lugs 461 symmetrically disposed on the lower portion of the tank shell 410. By symmetrically disposing the two lifting lugs 461 on the lower portion of the tank shell 410 as the lifting structure 460, the equipment can be significantly easier to transport and install. Furthermore, the lifting structure 460 simplifies the docking process for hoisting equipment, shortening installation time.

[0106] In an embodiment of the present invention, the self-insulating intermediate tank 400 further includes an annular skirt 413 disposed on the opening 411. Providing the annular skirt 413 at the opening 411 effectively increases the rigidity of the opening 411, preventing deformation due to external impact or internal pressure changes, and ensuring tightness and stability of the connection.

[0107] Implementation Method 3

[0108] An embodiment of the present invention provides a method for heat-insulating molten slag using the tundish sealing cover 300 described in the first embodiment, comprising the following steps:

[0109] Step S1: Control the drive mechanism 330 to retract to drive the flip mechanism 340 to rotate, and pull the cover structure 320 to flip through the lever force of the flip mechanism 340, so that the cover structure 320 is separated from the self-insulating intermediate tank 400, thereby opening the self-insulating intermediate tank 400;

[0110] Step S2: Control the crane to lift the slag pot loaded with molten electric furnace slag, and pour the molten electric furnace slag into the self-insulating intermediate pot 400 to complete the slag transfer operation;

[0111] Step S3: The driving mechanism 330 is controlled to extend to drive the flipping mechanism 340 to rotate in the opposite direction. The lever force of the flipping mechanism 340 pushes the cover structure 320 to flip, so that the cover structure 320 and the self-insulating intermediate tank 400 are closed. During the closing process, the annular side edge of the thermal insulation structure 324 and the annular skirt 413 of the self-insulating intermediate tank 400 squeeze the sealing structure 325, thereby achieving a seal between the slag intermediate tank sealing cover 300 and the self-insulating intermediate tank 400.

[0112] Step S4: Repeat the operation process from step S1 to step S3 to achieve continuous heat preservation treatment of the molten electric furnace slag.

[0113] Specifically, the hydraulic push rod 331 is controlled to retract to drive the flip shaft 341 to rotate, and the cover structure 320 is pulled to flip through the lever force of the flip shaft 341, so that the cover structure 320 is separated from the self-insulating intermediate tank 400, thereby opening the self-insulating intermediate tank 400; the driving crane is controlled to lift the slag pot loaded with molten electric furnace slag, and the molten electric furnace slag is poured into the self-insulating intermediate tank 400 to complete the slag transfer operation; the hydraulic push rod 331 is controlled to extend to drive the flip shaft 341 to rotate in the opposite direction, and the cover structure 320 is pushed to flip through the lever force of the flip shaft 341, so that the top cover lining 3241 and the self-insulating intermediate tank 400 are closed; during the closing process, the annular side edge of the top cover lining 3241 and the annular skirt 413 of the self-insulating intermediate tank 400 squeeze the thermal insulation sealing gasket 3251 to achieve sealing between the slag intermediate tank sealing cover 300 and the self-insulating intermediate tank 400.

[0114] The molten slag insulation method of the present invention realizes efficient opening and sealing closure operations of the self-insulating intermediate tank 400 through the coordinated cooperation of the driving mechanism 330, the turning mechanism 340 and the cover structure 320.

[0115] Specifically, by utilizing the drive mechanism 330 to rotate the tilting mechanism 340 and leveraging the principle of leverage to precisely tilt the cover structure 320, the self-insulating intermediate tank 400 can be opened and closed smoothly and reliably. During the closing process, the annular side edge of the top cover liner 3241 and the skirt of the tank opening of the self-insulating intermediate tank 400 squeeze through the sealing structure 325 to form a reliable seal, effectively isolating the outside air, reducing heat loss, and ensuring that the temperature of the molten slag is maintained for a long time.

[0116] Furthermore, the method is repeatable, achieving continuous heat preservation of the molten slag, significantly improving production efficiency and energy utilization while reducing heat loss and environmental pollution, thus meeting the energy-saving and environmental protection requirements for high-temperature material processing in industrial production. The molten slag insulation method of the present invention is highly adaptable and well-suited for large-scale industrial applications.

[0117] All articles and references disclosed, including patent applications and publications, are incorporated herein by reference for all purposes. The term "essentially consisting of..." describing a combination should include the identified elements, ingredients, parts or steps and other elements, ingredients, parts or steps that do not substantially affect the basic novel features of the combination. The use of the terms "comprising" or "including" to describe the combination of elements, ingredients, parts or steps herein also contemplates an embodiment that is essentially composed of these elements, ingredients, parts or steps. By using the term "may", it is intended to illustrate that any attribute described that "may" include is optional. Multiple elements, ingredients, parts or steps can be provided by a single integrated element, ingredient, part or step. Alternatively, a single integrated element, ingredient, part or step can be divided into separate multiple elements, ingredients, parts or steps. The disclosure "one" or "an" used to describe an element, ingredient, part or step is not intended to exclude other elements, ingredients, parts or steps.

[0118] Each embodiment in this specification is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. The above embodiments are only for illustrating the technical concept and features of the present invention. Their purpose is to enable people familiar with this technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the scope of protection of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the scope of protection of the present invention.

Claims

1. A sealing cover for an intermediate tank, characterized in that: include: A supporting structure, wherein a turning mechanism is provided on the supporting structure; a cover structure comprising a support beam connected to the turnover mechanism, a top cover disposed on the support beam, and a skirt cover disposed on the top cover, the top cover being provided with a heat insulating structure and a sealing structure, the top cover being capable of covering the self-insulating intermediate tank, and the sealing structure being capable of sealing the top cover and the self-insulating intermediate tank; A driving mechanism is provided on the supporting structure and connected to the flipping mechanism, and is used for driving the flipping mechanism to drive the cover structure to flip.

2. The intermediate tank sealing cover according to claim 1, wherein: The heat insulation structure includes a top cover lining plate arranged on the inner wall of the top cover and a heat insulation layer arranged on the inner wall of the top cover lining plate.

3. The intermediate tank sealing cover according to claim 2, wherein: The inner wall of the top cover is provided with a plurality of spaced-apart connecting nails, and the top cover lining plate is formed on the inner wall of the top cover by castable refractory material.

4. The intermediate tank sealing cover according to claim 3, wherein: The castable refractory material is heat-resistant concrete.

5. The intermediate tank sealing cover according to claim 2, wherein: The sealing structure includes a heat-insulating sealing gasket provided on the annular side edge of the top cover lining plate, and the heat-insulating sealing gasket can be used for abutting and sealing against the tank mouth skirt of the self-insulating intermediate tank.

6. The intermediate tank sealing cover according to claim 5, characterized in that: The heat-insulating sealing gasket is formed by elastic refractory material.

7. The intermediate tank sealing cover according to claim 6, wherein: The elastic refractory material is a cotton gasket or asbestos packing, or a combination of the two.

8. The intermediate tank sealing cover according to claim 1, wherein: The cover structure further includes a reinforcement structure arranged between the top cover and the skirt cover.

9. The intermediate tank sealing cover according to claim 8, wherein: The reinforcement structure includes a plurality of reinforcement ribs, which are arranged at intervals and connect the top cover and the skirt cover.

10. The intermediate tank sealing cover according to claim 1, wherein: The supporting structure includes a base and a bracket arranged on the base. The flip mechanism includes a flip axis arranged on the bracket. The flip axis is provided with a first flip part and a second flip part arranged at a preset angle. The first flip part is connected to the cover structure, and the second flip part is hingedly connected to the driving mechanism.

11. The intermediate tank sealing cover according to claim 10, wherein: The driving mechanism includes a hydraulic push rod, a hydraulic cylinder of the hydraulic push rod is arranged on the base, and a hydraulic rod of the hydraulic push rod is hingedly connected to the second flipping part.

12. A thermal insulation component, characterized in that: The invention comprises a self-insulating intermediate tank and the intermediate tank sealing cover according to claim 1, wherein the intermediate tank sealing cover can be used for sealing the self-insulating intermediate tank.

13. A method for heat-insulating molten slag using the tundish sealing cover according to claim 1, characterized in that: The steps include: Step S1: Controlling the drive mechanism to retract to drive the flip mechanism to rotate, and pulling the cover structure to flip through the lever force of the flip mechanism, so that the cover structure is separated from the self-insulating intermediate tank, thereby opening the self-insulating intermediate tank; Step S2: controlling the crane to lift the slag pot loaded with molten electric furnace slag, and pouring the molten electric furnace slag into the self-insulating intermediate pot to complete the slag transfer operation; Step S3: Controlling the driving mechanism to extend to drive the flipping mechanism to rotate in the opposite direction, and using the lever force of the flipping mechanism to flip the cover structure, so that the cover structure and the self-insulating intermediate tank are closed; during the closing process, the annular side edge of the thermal insulation structure and the tank opening skirt of the self-insulating intermediate tank squeeze the sealing structure to achieve a seal between the intermediate tank sealing cover and the self-insulating intermediate tank; Step S4: Repeat the operation process from step S1 to step S3 to achieve continuous heat preservation treatment of the molten electric furnace slag.

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