Hot-rolled stainless steel continuous annealing furnace and annealing system

Abstract

The utility model discloses a hot-rolled stainless steel continuous annealing furnace and an annealing system and relates to the field of metallurgical devices. The hot-rolled stainless steel continuous annealing furnace comprises an annealing furnace shell, the annealing furnace shell comprises a preheating section and a plurality of heating sections which are sequentially connected, disc rollers capable of rotating to support steel billets are arranged between every two adjacent heating sections and at the end, away from the preheating section, of the last heating section respectively, and a sealing lifting roller mechanism is arranged between the preheating section and the heating section; the sealing lifting roller mechanism comprises at least two carrier roller supports arranged in the length direction of the annealing furnace shell at intervals, carrier rollers in one-to-one correspondence with the carrier roller supports and a lifting mechanism used for driving the carrier roller supports to ascend and descend, and the carrier roller supports are connected with the annealing furnace shell in a sealing fit mode in a liftable mode. The carrier rollers are rotatably connected to the corresponding carrier roller supports to support the steel billet. According to the hot-rolled stainless steel continuous annealing furnace and the annealing system, the air tightness of the carrier rollers can be improved, the furnace pressure and the furnace temperature are controlled, the atmosphere in the furnace is guaranteed, and energy consumption is effectively reduced.

Description

Technical Field

[0001] This application relates to the field of metallurgical equipment, and more specifically, to a hot-rolled stainless steel continuous annealing furnace and annealing system. Background Technology

[0002] Currently, most domestic hot-rolled stainless steel continuous annealing furnaces are of the suspended furnace type. They use rotatable furnace rollers to support the steel billet in the middle of the furnace shell. The configuration of the heating section of the annealing furnace determines the energy consumption and operational stability of the furnace, thereby ensuring the temperature and atmosphere requirements for solution annealing of hot-rolled stainless steel.

[0003] The current mainstream annealing furnace design has a TV value of 200 mm·m / min or higher. The heating section of the annealing furnace is mostly designed as a preheating section and five heating sections, supported by six disc rollers. However, due to the poor airtightness of the disc rollers, external cold air can easily enter the annealing furnace, resulting in increased energy consumption and reduced economic efficiency.

[0004] Therefore, a hot-rolled stainless steel continuous annealing furnace with good airtightness and low energy consumption is needed to solve the above-mentioned defects. Utility Model Content

[0005] The purpose of this application is to provide a hot-rolled stainless steel continuous annealing furnace and annealing system, which can improve the airtightness of the idler rollers and control the furnace pressure and temperature, ensure the furnace atmosphere, and effectively reduce energy consumption.

[0006] This application is implemented as follows:

[0007] This application provides a hot-rolled stainless steel continuous annealing furnace, which includes an annealing furnace shell. The annealing furnace shell includes a preheating section and a plurality of heating sections connected in sequence. Rotatable disc rollers for supporting steel billets are respectively provided between two adjacent heating sections and at the end of the last heating section away from the preheating section. A sealed lifting roller mechanism is provided between the preheating section and the heating section. The sealed lifting roller mechanism includes at least two idler roller supports arranged at intervals along the length of the annealing furnace shell, idler rollers corresponding to the idler roller supports one by one, and a lifting mechanism for driving each idler roller support to rise and fall. The idler roller supports are rotatably and sealingly connected to the annealing furnace shell, and the idler rollers are rotatably connected to the corresponding idler roller supports to support the steel billets.

[0008] In some optional embodiments, the two sides of the annealing furnace shell are respectively provided with lifting holes for the two ends of each roller to extend and rise. The roller support includes two lifting sliding frames respectively sleeved on the two ends of the corresponding roller. The two lifting sliding frames are respectively enclosed with the outer walls of the two sides of the annealing furnace shell to form a sealed cavity covering the two ends of the corresponding roller. The lifting mechanism is used to drive the two lifting sliding frames corresponding to each roller support to rise and fall.

[0009] In some alternative embodiments, the side of the lifting sliding frame facing the annealing furnace shell is provided with a first refractory sealing gasket that slides against the outer wall of the annealing furnace shell. The first refractory sealing gasket extends circumferentially along the lifting hole, and the lifting sliding frame moves up and down so that the lifting hole is located inside the corresponding first refractory sealing gasket.

[0010] In some alternative embodiments, the inner walls on both sides of the annealing furnace shell are respectively provided with second refractory sealing gaskets extending circumferentially along the lifting hole, and the side walls of the second refractory sealing gaskets and the side walls of the first refractory sealing gaskets are slidably sealed together.

[0011] In some alternative embodiments, the inner wall of the lifting hole is provided with a third fire-resistant sealing gasket extending circumferentially therein, and the two sides of the third fire-resistant sealing gasket are respectively in sliding sealing engagement with the first fire-resistant sealing gasket and the second fire-resistant sealing gasket.

[0012] In some alternative implementations, the lifting mechanism includes a lifting motor corresponding to each roller bracket. The output shaft of each lifting motor is connected to a worm gear, and the two ends of the worm gear are respectively engaged with a turbine. The two turbines are respectively connected to two lead screws by threads, and the two lead screws are respectively connected to two lifting sliding frames of the corresponding roller bracket.

[0013] In some alternative implementations, the two lifting sliding frames are respectively connected to outer protective covers fitted onto the ends of the corresponding idler rollers on the side away from the annealing furnace shell. The two outer protective covers are respectively connected to bearing seats, and the two bearing seats are respectively provided with bearings fitted onto the ends of the idler rollers.

[0014] In some optional implementations, the two sides of the annealing furnace shell are respectively provided with limiting mechanisms corresponding to each lifting sliding frame. The limiting mechanism includes two limiting frames provided on both sides of the corresponding lifting sliding frame, and a lifting slide groove is formed between the two limiting frames for the lifting sliding frame to move up and down.

[0015] In some alternative embodiments, the annealing furnace shell is connected to two fixed seats located above and below the corresponding limiting frames on both sides, and the fixed seats and the corresponding limiting frames are connected by at least one connecting bolt.

[0016] This application also provides an annealing system comprising the aforementioned hot-rolled stainless steel continuous annealing furnace.

[0017] The beneficial effects of this application are as follows: The hot-rolled stainless steel continuous annealing furnace provided by this application includes an annealing furnace shell, which includes a preheating section and multiple heating sections connected in sequence. Rotatable disc rollers to support steel billets are respectively provided between two adjacent heating sections and at the end of the last heating section away from the preheating section. A sealed lifting roller mechanism is provided between the preheating section and the heating section. The sealed lifting roller mechanism includes at least two idler roller supports spaced apart along the length of the annealing furnace shell, idler rollers corresponding to each idler roller support, and a lifting mechanism for driving the lifting and lowering of each idler roller support. The idler roller supports are movably and sealingly connected to the annealing furnace shell, and the idler rollers are rotatably connected to the corresponding idler roller supports to support the steel billets. The hot-rolled stainless steel continuous annealing furnace and annealing system provided by this application, by replacing the disc rollers with a sealed lifting roller mechanism at the end of the annealing furnace shell, can utilize the idler roller supports that are movably and sealingly connected to the annealing furnace shell to support the lifting and lowering of the idler rollers, thereby improving the airtightness of the idler rollers and controlling the furnace pressure and temperature, ensuring the furnace atmosphere, and effectively reducing energy consumption. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the longitudinal section of the continuous annealing furnace for hot-rolled stainless steel provided in Embodiment 1 of this application;

[0020] Figure 2 This is a partial cross-sectional view of the longitudinal section of the sealing lifting roller mechanism of the hot-rolled stainless steel continuous annealing furnace provided in Embodiment 1 of this application.

[0021] Figure 3 This is a partial cross-sectional view of the sealing lifting roller mechanism of the hot-rolled stainless steel continuous annealing furnace provided in Embodiment 1 of this application.

[0022] Figure 4 for Figure 3 A magnified schematic diagram of a local structure.

[0023] In the diagram: 100, Annealing furnace shell; 110, Preheating section; 120, Heating section; 130, Disc roller; 140, Lifting hole; 200, Sealing lifting roller mechanism; 210, Idler roller bracket; 220, Idler roller; 230, Lifting sliding frame; 240, Sealing cavity; 250, First refractory sealing gasket; 260, Second refractory sealing gasket; 270, Third refractory sealing gasket; 280, Outer protective cover; 290, Bearing seat; 291, Bearing; 292, Idler roller motor bracket; 293, Idler roller motor; 294, Universal coupling; 300, Lifting mechanism; 310, Lifting motor; 320, Worm gear; 330, Turbine; 340, Lead screw; 400, Limiting frame; 410, Lifting slide; 420, Fixed seat; 430, Connecting bolt. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0025] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0026] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0027] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0028] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0029] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" 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 application based on the specific circumstances.

[0030] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0031] The following detailed description of the features and performance of the hot-rolled stainless steel continuous annealing furnace and tempering system of this application is provided in conjunction with embodiments.

[0032] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, this application provides a hot-rolled stainless steel continuous annealing furnace, which includes an annealing furnace shell 100 composed of a preheating section 110 and four heating sections 120 connected in sequence. Rotatable disc rollers 130 are respectively provided between two adjacent heating sections 120 and at the end of the last heating section 120 away from the preheating section 110 to support steel billets. Each disc roller 130 is connected to a disc roller drive device for driving its rotation. A sealed lifting roller mechanism 200 is provided between the preheating section 110 and the heating section 120.

[0033] The sealing lifting roller mechanism 200 includes two roller supports 210 spaced apart along the length of the annealing furnace shell 100, rollers 220 corresponding to each roller support 210, and a lifting mechanism 300 for driving each roller support 210 to rise and fall. Each roller support 210 is vertically and vertically connected to the annealing furnace shell 100 in a sealed fit. Both ends of each roller 220 extend through both sides of the annealing furnace shell 100 and are rotatably connected to the corresponding roller support 210 to support the steel billet. Both sides of the annealing furnace shell 100 are provided with lifting holes 140 for the two ends of each roller 220 to extend and rise and fall. Each roller support 210 includes two lifting sliding frames 230 respectively sleeved on both ends of the corresponding roller 220. The two lifting sliding frames 230 are respectively enclosed with the outer walls of both sides of the annealing furnace shell 100 to form a sealing cavity 240 covering both ends of the corresponding roller 220.

[0034] The lifting sliding frame 230 has a first refractory sealing gasket 250 that slides against the outer wall of the annealing furnace shell 100 on the side facing the annealing furnace shell 100. The first refractory sealing gasket 250 extends circumferentially along the lifting hole 140. When the lifting sliding frame 230 is raised or lowered, the lifting hole 140 is located inside the corresponding first refractory sealing gasket 250. The inner walls of both sides of the annealing furnace shell 100 are respectively provided with second refractory sealing gaskets 260 that extend circumferentially along the lifting hole 140. The inner wall of the lifting hole 140 is provided with a third refractory sealing gasket 270 that extends circumferentially along it. The two sides of the third refractory sealing gasket 270 are respectively slidably sealed with the first refractory sealing gasket 250 and the second refractory sealing gasket 260.

[0035] The lifting mechanism 300 includes a lifting motor 310 corresponding to each roller support 210. The lifting motor 310 is fixedly connected to the top of the annealing furnace shell 100. The output shaft of the lifting motor 310 is connected to a worm gear 320. The two ends of the worm gear 320 are respectively engaged with a turbine 330. The two turbines 330 are respectively connected to two lead screws 340 by threads. The two lead screws 340 are respectively connected to two lifting sliding frames 230 of the corresponding roller support 210. Two lifting sliding frames 230 are respectively connected to outer protective covers 280 sleeved on both ends of the corresponding rollers 220 on the side away from the annealing furnace shell 100. The two outer protective covers 280 are respectively connected to bearing seats 290 on the side away from the corresponding lifting sliding frames 230. Bearings 291 sleeved on both ends of the rollers 220 are respectively provided on the two bearing seats 290. One of the lifting sliding frames 230 in each roller bracket 210 is connected to a roller motor bracket 292. A roller motor 293 is connected to the roller motor bracket 292. The output shaft of the roller motor 293 is connected to one end of the corresponding roller 220 through a universal coupling 294.

[0036] The annealing furnace shell 100 is provided with limiting mechanisms on both sides corresponding to each lifting sliding frame 230. The limiting mechanism includes two limiting frames 400 on both sides of the corresponding lifting sliding frame 230. The two sides of the annealing furnace shell 100 are respectively connected to fixed seats 420 located above and below the corresponding limiting frames 400. The upper fixed seat 420 and the lower fixed seat 420 are respectively connected to the corresponding limiting frame 400 by one and two connecting bolts 430. A lifting slide groove 410 is formed between the two limiting frames 400 for the corresponding lifting sliding frame 230 to rise and fall.

[0037] The continuous annealing furnace for hot-rolled stainless steel provided in this application replaces the conventional annealing furnace shell 100, which consists of a preheating section and five heating sections, with an annealing furnace shell 100 consisting of a preheating section and four heating sections. Furthermore, the disc roller between the preheating section 110 and the heating section 120 is replaced with a sealing lifting roller mechanism 200 with good sealing performance. This ensures that the preheating section 110, which is closest to the exhaust fan and has the highest furnace pressure negative pressure, has sufficient sealing performance, reducing leakage and cold air intake present with conventional disc rollers, thus reducing heat loss. Simultaneously, the reduced cold air intake significantly decreases the furnace pressure difference and ratio between the furnace head and tail of the entire annealing furnace shell 100, making the furnace pressure control within the entire furnace chamber of the annealing furnace shell 100 more stable and ensuring the furnace temperature and atmosphere control requirements for solution annealing of hot-rolled stainless steel within the annealing furnace shell 100.

[0038] The sealing lifting roller mechanism 200 includes two roller supports 210 spaced apart along the length of the annealing furnace shell 100, rollers 220 corresponding to each roller support 210, and a lifting mechanism 300 for driving each roller support 210 to rise and fall. Each roller support 210 includes two lifting sliding frames 230 respectively sleeved on both ends of the corresponding roller 220. The two lifting sliding frames 230 are respectively enclosed with the outer walls on both sides of the annealing furnace shell 100 to form a sealing cavity 240 covering both ends of the corresponding roller 220. The two lifting sliding frames 230 of the roller support 210 can be used to improve the sealing of both ends of the roller 220, and prevent external atmosphere from entering the annealing furnace shell 100 through the gap between the roller 220 and the annealing furnace shell 100, reducing the furnace temperature and affecting the atmosphere inside the furnace.

[0039] When the lifting mechanism 300 drives each roller bracket 210 to rise or fall, it controls the lifting motor 310 to start and drive the worm gear 320 to rotate. The rotating worm gear 320 drives the two turbines 330 to rotate, which in turn drives the corresponding lead screw 340 to rise or fall. This drives the lifting sliding frame 230 connected to the two lead screws 340 to rise or fall. The rollers 220 connected to the two lifting sliding frames 230 at both ends are adjusted to rise or fall, thereby adjusting the height of the two rollers 220 in the sealed lifting roller mechanism 200 for replacement. A first refractory sealing gasket 250 is provided on the side of the lifting sliding frame 230 facing the annealing furnace shell 100, which slides against the outer wall of the annealing furnace shell 100. This improves the airtightness between the lifting sliding frame 230 and the outer wall of the annealing furnace shell 100, ensuring the sealing of the sealing cavity 240 when the lifting sliding frame 230 is raised or lowered. This prevents external cold air from entering the annealing furnace shell 100 through the sealing cavity 240 and the lifting hole 140, thus affecting the furnace temperature and atmosphere. Second refractory sealing gaskets 260 extending circumferentially along the lifting hole 140 are provided on the inner walls of both sides of the annealing furnace shell 100, and a third refractory sealing gasket 270 extending circumferentially along the inner wall of the lifting hole 140. The two sides of the sealing gasket 270 are respectively slidably sealed with the first refractory sealing gasket 250 and the second refractory sealing gasket 260. The cooperation of the first refractory sealing gasket 250, the second refractory sealing gasket 260 and the third refractory sealing gasket 270 can improve the airtightness between the lifting sliding frame 230 and the annealing furnace shell 100. When the lifting mechanism 300 drives each roller bracket 210 to lift, the two sides of the third refractory sealing gasket 270 are respectively slidably sealed with the first refractory sealing gasket 250 and the second refractory sealing gasket 260 to improve the airtightness performance, and further prevent external cold air from entering the annealing furnace shell 100, reducing the furnace temperature and affecting the furnace atmosphere.

[0040] Two lifting sliding frames 230 are respectively connected to outer protective covers 280 sleeved on both ends of the corresponding idler rollers 220 on the side away from the annealing furnace shell 100. The outer protective covers 280 sleeved on both ends of the idler rollers 220 can further improve the airtightness of the idler rollers 220 where they pass through the lifting sliding frames 230. Bearing seats 290 are respectively connected to the side of the two outer protective covers 280 away from the corresponding lifting sliding frames 230. The two bearing seats 290 are respectively provided with bearings 291 sleeved on both ends of the idler rollers 220. Each roller bracket 210 has a lifting sliding frame 230 connected to a roller motor bracket 292. A roller motor 293 is connected to the roller motor bracket 292. The output shaft of the roller motor 293 is connected to one end of the corresponding roller 220 through a universal coupling 294. When the lifting sliding frame 230 lifts and lowers, driving the outer protective cover 280 and the roller motor bracket 292 to lift and lower, the output shaft of the roller motor 293 rotates, driving the roller 220 to rotate stably through the universal coupling 294.

[0041] The annealing furnace shell 100 is provided with limiting mechanisms on both sides corresponding to each lifting sliding frame 230. The limiting mechanism includes two limiting frames 400 on both sides of the corresponding lifting sliding frame 230. A lifting groove 410 is formed between the two limiting frames 400 to allow the corresponding lifting sliding frame 230 to rise and fall. The lifting groove 410 formed between the two limiting frames 400 can be used to limit the lifting sliding frame 230 on both sides of the annealing furnace shell 100 to rise and fall stably, thereby driving the roller 220 to rise and fall.

[0042] This application also provides an annealing system, which includes the above-described hot-rolled stainless steel continuous annealing furnace.

[0043] In actual operation, the hot-rolled stainless steel continuous annealing furnace and annealing system provided in this application embodiment can save more than 1 cubic meter of natural gas per ton of steel, significantly improve furnace pressure stability and oxygen content stability, and reduce the cost of the hot-rolled stainless steel continuous annealing furnace system by hundreds of thousands of yuan, thus significantly improving the high efficiency and energy saving of the hot-rolled stainless steel continuous annealing furnace system.

[0044] The embodiments described above are some, but not all, of the embodiments of this application. The detailed description of the embodiments of this application is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

Claims

1. A continuous annealing furnace for hot-rolled stainless steel, comprising an annealing furnace shell, the annealing furnace shell including a preheating section and a plurality of heating sections connected in sequence, wherein rotatable disc rollers for supporting steel billets are respectively provided between two adjacent heating sections and at the end of the last heating section away from the preheating section, characterized in that, A sealing lifting roller mechanism is provided between the preheating section and the heating section; the sealing lifting roller mechanism includes at least two idler roller supports arranged at intervals along the length direction of the annealing furnace shell, idler rollers corresponding to each idler roller support, and a lifting mechanism for driving each idler roller support to rise and fall. The idler roller support is vertically and vertically connected to the annealing furnace shell in a sealed fit, and the idler roller is rotatably connected to the corresponding idler roller support to support the steel billet.

2. The continuous annealing furnace for hot-rolled stainless steel according to claim 1, characterized in that, The annealing furnace shell has lifting holes on both sides for the two ends of each roller to extend and move up and down. The roller support includes two lifting sliding frames respectively fitted onto the two ends of the corresponding roller. The two lifting sliding frames are respectively enclosed with the outer walls of both sides of the annealing furnace shell to form a sealed cavity covering the two ends of the corresponding roller. The lifting mechanism is used to drive the two lifting sliding frames corresponding to each roller support to move up and down.

3. The continuous annealing furnace for hot-rolled stainless steel according to claim 2, characterized in that, The lifting sliding frame is provided with a first refractory sealing gasket on the side facing the annealing furnace shell, which slides against the outer wall of the annealing furnace shell. The first refractory sealing gasket extends circumferentially along the lifting hole, and the lifting sliding frame moves up and down so that the lifting hole is located inside the corresponding first refractory sealing gasket.

4. The continuous annealing furnace for hot-rolled stainless steel according to claim 3, characterized in that, The inner walls on both sides of the annealing furnace shell are respectively provided with second refractory sealing gaskets extending circumferentially along the lifting hole, and the side walls of the second refractory sealing gaskets and the side walls of the first refractory sealing gaskets are slidably sealed together.

5. The continuous annealing furnace for hot-rolled stainless steel according to claim 4, characterized in that, The inner wall of the lifting hole is provided with a third fire-resistant sealing gasket extending circumferentially therein, and the two sides of the third fire-resistant sealing gasket are respectively slidably sealed with the first fire-resistant sealing gasket and the second fire-resistant sealing gasket.

6. The continuous annealing furnace for hot-rolled stainless steel according to claim 2, characterized in that, The lifting mechanism includes a lifting motor corresponding to each of the roller brackets. The output shaft of each lifting motor is connected to a worm gear. Both ends of the worm gear are respectively engaged with a turbine. The two turbines are respectively connected to two lead screws by threads. The two lead screws are respectively connected to two lifting sliding frames corresponding to the roller brackets.

7. The continuous annealing furnace for hot-rolled stainless steel according to claim 2, characterized in that, Each of the two lifting sliding frames is connected to an outer protective cover sleeved on both ends of the corresponding idler roller on the side away from the annealing furnace shell. Each of the two outer protective covers is connected to a bearing seat, and each of the two bearing seats is provided with a bearing sleeved on both ends of the idler roller.

8. The continuous annealing furnace for hot-rolled stainless steel according to claim 2, characterized in that, The annealing furnace shell is provided with limiting mechanisms on both sides corresponding to each of the lifting sliding frames. The limiting mechanism includes two limiting frames on both sides of the corresponding lifting sliding frame, and a lifting groove is formed between the two limiting frames for the lifting sliding frame to move up and down.

9. The continuous annealing furnace for hot-rolled stainless steel according to claim 8, characterized in that, The annealing furnace shell has fixed seats on both sides, located above and below the corresponding limiting frame, and the fixed seats and the corresponding limiting frame are connected by at least one connecting bolt.

10. An annealing system, characterized in that, It includes a continuous annealing furnace for hot-rolled stainless steel as described in any one of claims 1 to 9.

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