A metallurgical furnace

Abstract

The present application provides a kind of metallurgical furnace, including base, furnace bottom steel structure being arranged on base, furnace and furnace body elastic structure being arranged on furnace bottom steel structure and covering furnace;Furnace bottom steel structure includes multiple bottom beams arranged on base, and bottom plate arranged on bottom beam;Furnace body elastic structure includes end column group, side column group, transverse pull rod structure, longitudinal pull rod structure and top plate, end column group includes left end column and right end column arranged at the left and right ends of furnace, and side column group includes front side column and rear side column arranged at the front and rear sides of furnace;Transverse pull rod structure includes first pull rod structure and second pull rod structure, left end column and right end column are connected to the left and right ends of bottom beam by first pull rod structure, and the left and right sides of top plate are connected to left end column and right end column by second pull rod structure.Solve the technical problem that when the size of furnace body is larger, the symmetry of expansion is difficult to guarantee, which reduces the service life of furnace body in the prior art.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of smelting equipment, in particular to a metallurgical furnace. BACKGROUND

[0002] The metallurgical furnace is a device for reaction or storage of high-temperature melt. In the copper smelting industry, the temperature of high-temperature melt is above 1300 DEG C. In order to resist the erosion of high-temperature melt, electric smelting magnesia-chrome bricks with high refractoriness, low porosity and corrosion resistance are used in the area directly contacting with the melt. When the furnace is normally operated, the refractory bricks will expand in the high-temperature environment. When the furnace is in the state of heat preservation or shutdown, the temperature will be relatively reduced, and the refractory bricks will relatively shrink, so that the refractory bricks will generate brick joints. The high-temperature melt will leak to the secondary working layer along the brick joints. After repeated times, the leakage will be more and more, and in severe cases, the furnace bottom will be burnt through and copper will leak or the furnace bottom will be brick floating.

[0003] In order to avoid the foregoing problems, the outer side of many furnace bodies is designed with refractory material, and most of them adopt steel structure, that is, the steel structure can adapt to the expansion of the refractory bricks. When the refractory bricks expand, the steel structure expands accordingly, and when the refractory bricks shrink, the steel structure also shrinks accordingly. However, when the size of the furnace body is large, the symmetry of expansion is difficult to guarantee, which reduces the service life of the furnace body. SUMMARY

[0004] Based on this, the purpose of the present application is to provide a metallurgical furnace for solving the technical problem that when the size of the furnace body is large, the symmetry of expansion is difficult to guarantee, which reduces the service life of the furnace body in the prior art.

[0005] The present application provides a metallurgical furnace, which comprises a base, a furnace bottom steel structure arranged on the base, a furnace arranged on the furnace bottom steel structure, and a furnace body elastic structure covering the furnace.

[0006] The furnace bottom steel structure comprises a plurality of bottom beams arranged on the base, and a bottom plate arranged on the bottom beams and used for connecting the bottom end of the furnace. The plurality of bottom beams are arranged in parallel and at intervals.

[0007] The furnace body elastic structure comprises an end column group, a side column group, a horizontal pull rod structure, a vertical pull rod structure and a top plate. The top plate is located at the top end of the furnace. The end column group comprises a left end column and a right end column arranged at the left and right ends of the furnace respectively. The left end column and the right end column correspond to the left and right ends of the bottom beams respectively. The side column group comprises a front side column and a rear side column arranged symmetrically at the front and rear sides of the furnace.

[0008] The transverse tie rod structure includes a first tie rod structure and a second tie rod structure. The left end column and the right end column are respectively connected to the left and right ends of the bottom beam through the first tie rod structure. The left and right sides of the top plate are respectively connected to the left end column and the right end column through the second tie rod structure. The longitudinal tie rod structure includes a third tie rod structure and a fourth tie rod structure. The front side column and the rear side column are respectively connected to the front and rear ends of the bottom plate through the third tie rod structure. The front and rear sides of the top plate are respectively connected to the front side column and the rear side column through the fourth tie rod structure.

[0009] The aforementioned metallurgical furnace decomposes the expansion forces in the length and width directions of the furnace through its elastic structure, ensuring the symmetry of the furnace expansion. Specifically, when the refractory material expands, the end column assembly and side column assembly are connected to the bottom beam and bottom plate as a whole through transverse and longitudinal tie rod structures, respectively. The combined structure of the bottom beam and bottom plate ensures the symmetry and uniformity of the furnace expansion in the length and width directions, ensuring the integrity of the refractory material. It also prevents the refractory bricks at the bottom from developing brick joints that could damage the furnace bottom when the furnace condition fluctuates, thus extending the service life of the refractory material. This overcomes the defect of asymmetrical expansion when the furnace body is large, and solves the technical problem in the prior art where the symmetry of expansion is difficult to guarantee when the furnace body is large, leading to a reduction in the service life of the furnace body.

[0010] Furthermore, in the metallurgical furnace, the first tie rod structure includes a first fixing nut, a first tie rod, and a first adjusting nut. One end of the first tie rod passes through the left end column and is fixedly connected to the bottom beam by the first fixing nut. The other end of the first tie rod is connected to the first adjusting nut, and the first adjusting nut abuts against the surface of the left end column.

[0011] The second tie rod structure includes a second fixing nut, a second tie rod, and a second adjusting nut. One end of the second tie rod passes through the left end column and is fixedly connected to the top plate by the second fixing nut. The other end of the second tie rod is connected to the second adjusting nut, which abuts against the surface of the left end column.

[0012] Furthermore, in the metallurgical furnace, a first spring is provided between the first adjusting nut and the left end column, and a second spring is provided between the second adjusting nut and the left end column.

[0013] Furthermore, in the metallurgical furnace, the stiffness of the second spring is less than the stiffness of the first spring.

[0014] Furthermore, in the metallurgical furnace, the bottom beam is provided with a plurality of first circular holes, which are spaced apart along the length of the bottom beam. The bottom plate is provided with a plurality of mounting holes corresponding to the first circular holes. The first circular holes are fixedly connected to the mounting holes by a bolt, so that the bottom beam and the bottom plate form an integral unit.

[0015] Furthermore, in the metallurgical furnace, the mounting holes include second circular holes and kidney-shaped holes. The second circular holes are spaced apart along the transverse central axis of the base plate, and the kidney-shaped holes are symmetrically distributed on opposite sides of the second circular holes. The long side of the kidney-shaped holes is set along the width direction of the base plate.

[0016] Furthermore, in the metallurgical furnace, the third tie rod structure includes a third fixing nut, a third tie rod, a third spring, and a third adjusting nut. One end of the third tie rod passes through the front column and is fixedly connected to the bottom plate by the third fixing nut. The other end of the third tie rod is connected to the third adjusting nut. The third spring is disposed between the third adjusting nut and the front column.

[0017] The fourth tie rod structure includes a fourth fixing nut, a fourth tie rod, a fourth spring, and a fourth adjusting nut. One end of the fourth tie rod passes through the front column and is fixedly connected to the top plate by the fourth fixing nut. The other end of the fourth tie rod is connected to the fourth adjusting nut. The fourth spring is located between the fourth adjusting nut and the front column.

[0018] Furthermore, in the metallurgical furnace, a furnace body refractory layer is constructed between the furnace and the bottom plate, and a furnace body steel structure is provided around the furnace.

[0019] Furthermore, in the metallurgical furnace, the base is provided with embedded parts, and the bottom beam rests on the embedded parts and is fixedly connected to the embedded parts by an embedded bolt.

[0020] Furthermore, in the metallurgical furnace, the embedded part is provided with limiting clips that are closely attached to the opposite sides of the bottom beam, and the limiting clips are used to restrict the bottom beam from moving along the width direction of the bottom plate. Attached Figure Description

[0021] Figure 1 This is a front sectional view of the metallurgical furnace in this invention;

[0022] Figure 2 This is a side sectional view of the metallurgical furnace in this invention;

[0023] Figure 3 This is a top view of the elastic structure of the furnace body in this invention;

[0024] Figure 4 for Figure 1 A cross-sectional view at position AA in the middle;

[0025] Figure 5 for Figure 1 A cross-sectional view at position BB in the middle;

[0026] Figure 6 This is a schematic diagram of the specific structure connecting the left column, the bottom beam, and the top plate in this invention.

[0027] Figure 7 This is a schematic diagram showing the connection relationship between the bottom beam and the base in this invention;

[0028] Figure 8 This is a schematic diagram of the specific structure of the base plate in this invention;

[0029] Explanation of key component symbols:

[0030] Base 10 Furnace bottom steel structure 20 Bottom beam 21 Bottom plate 22 Furnace 30 Furnace body elastic structure 40 Left end column 41 Right end column 42 Front side column 43 Rear side column 44 First pull rod structure 51 Second pull rod structure 52 Third pull rod structure 53 Fourth pull rod structure 54 Top plate 60 First round hole 81 Second round hole 82 Waist hole 83 First fixed nut 511 First pull rod 512 First adjusting nut 513 First spring 514 Second fixed nut 521 Second pull rod 522 Second adjusting nut 523 Second spring 524 Furnace body steel structure 70 Pre-embedded part 110 Pre-embedded bolt 120 Limiting clamping piece 130

[0031] The following detailed description, in conjunction with the accompanying drawings, will further illustrate the present invention. Detailed Implementation

[0032] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Several embodiments of the invention are illustrated in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

[0033] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0035] Please combine Figures 1 to 8 The metallurgical furnace of the present invention includes a base 10, a furnace bottom steel structure 20 disposed on the base 10, a furnace 30 disposed on the furnace bottom steel structure 20, and a furnace body elastic structure 40 covering the furnace 30.

[0036] The furnace bottom steel structure 20 includes multiple bottom beams 21 set on the base 10, and a bottom plate 22 set on the bottom beams 21. The bottom plate 22 is used to connect the bottom end of the furnace 30. The multiple bottom beams 21 are parallel to each other and spaced apart.

[0037] A furnace body refractory layer is built between the furnace 30 and the bottom plate 22. A furnace body steel structure 70 is provided around the furnace 30. That is, when the furnace 30 expands, the furnace body steel structure 70 expands accordingly, and when it contracts, it contracts accordingly.

[0038] The furnace body elastic structure 40 includes an end column assembly, a side column assembly, a transverse tie rod structure, a longitudinal tie rod structure, and a top plate 60. The top plate 60 is located at the top of the furnace 30. The end column assembly includes a left end column 41 and a right end column 42 respectively disposed at the left and right ends of the furnace 30. The left end column 41 and the right end column 42 correspond one-to-one with the left and right ends of the bottom beam 21. The side column assembly includes a front side column 43 and a rear side column 44 symmetrically disposed on the front and rear sides of the furnace 30.

[0039] The transverse tie rod structure includes a first tie rod structure 51 and a second tie rod structure 52. The left end column 41 and the right end column 42 are respectively connected to the left and right ends of the bottom beam 21 through the first tie rod structure 51. The left and right sides of the top plate 60 are respectively connected to the left end column 41 and the right end column 42 through the second tie rod structure 52. The longitudinal tie rod structure includes a third tie rod structure 53 and a fourth tie rod structure 54. The front side column 43 and the rear side column 44 are respectively connected to the front and rear ends of the bottom plate 22 through the third tie rod structure 53. The front and rear sides of the top plate 60 are respectively connected to the front side column 43 and the rear side column 44 through the fourth tie rod structure 54.

[0040] In practical applications, when the refractory material of the furnace body expands, the refractory bricks compress the furnace body steel structure 70 due to the expansion. The furnace body steel structure 70 moves outward under the action of the expansion force, thereby transmitting the expansion force to the side column group and the end column group, compressing the transverse tie rod structure and the longitudinal tie rod structure. As the expansion force increases, the reaction force of the tie rod structure increases. After reaching the set value, the reaction force and the expansion force should reach a state of equilibrium to ensure the integrity of the refractory material.

[0041] Specifically, the bottom beam 21 is provided with a plurality of first circular holes 81, which are spaced apart along the length of the bottom beam 21. The bottom plate 22 is provided with a plurality of mounting holes corresponding to the first circular holes 81. The first circular holes 81 are fixedly connected to the mounting holes by a bolt so that the bottom beam 21 and the bottom plate 22 form an integral unit.

[0042] In this embodiment, the length direction of the furnace 30 is called the long axis, and the center line in the length direction is the center line of the long axis. The bottom beam 21 can expand symmetrically in the length direction with the center line of the long axis as the axis of symmetry. The width direction of the furnace 30 is called the short axis, and the center line in the width direction is the center line of the short axis. The bottom plate 22 can expand symmetrically in the width direction with the center line of the short axis as the axis of symmetry. Although the bottom plate 22 and the bottom beam 21 are relatively independent, they are also related to each other. They are connected together by bolts. The bottom plate 22 moves together with the bottom beam 21 in the long axis direction, thereby realizing the symmetrical expansion of the bottom plate 22 in the long axis direction.

[0043] Specifically, the mounting holes include second circular holes 82 and kidney-shaped holes 83. The second circular holes 82 are spaced apart along the transverse central axis of the base plate 22, and the kidney-shaped holes 83 are symmetrically distributed on opposite sides of the second circular holes 82. The long side of the kidney-shaped holes 83 is set along the width direction of the base plate 22. There are two first circular holes 81, and the two first circular holes 81 are symmetrically arranged along the central axis of the bottom beam 21. In this embodiment, the second circular holes 82 corresponding to the first circular holes 81 are opened on the transverse central axis of the base plate 22, and the remaining parts are opened with kidney-shaped holes 83, to ensure that the base plate 22 has no relative displacement in the length direction of the bottom beam 21, but can be relatively displaced in the width direction.

[0044] Specifically, the first tie rod structure 51 includes a first fixing nut 511, a first tie rod 512 and a first adjusting nut 513. One end of the first tie rod 512 passes through the left end column 41 and is fixedly connected to the bottom beam 21 by the first fixing nut 511. The other end of the first tie rod 512 is connected to the first adjusting nut 513, and the first adjusting nut 513 abuts against the surface of the left end column 41.

[0045] The second tie rod structure 52 includes a second fixing nut 521, a second tie rod 522 and a second adjusting nut 523. One end of the second tie rod 522 passes through the left end column 41 and is fixedly connected to the top plate 60 by the second fixing nut 521. The other end of the second tie rod 522 is connected to the second adjusting nut 523, and the second adjusting nut 523 abuts against the surface of the left end column 41.

[0046] Furthermore, a first spring 514 is provided between the first adjusting nut 513 and the left end column 41, and a second spring 524 is provided between the second adjusting nut 523 and the left end column 41.

[0047] In this embodiment, only the specific connection method between the bottom beam 21, the top plate 60 and the left end column 41 is described. As for the connection method between the bottom beam 21, the top plate 60 and the right end column 42, it is the same as the connection method between the bottom beam 21, the top plate 60 and the left end column 41, so it will not be described in detail.

[0048] In practical applications, the expansion of refractory bricks mainly occurs at the bottom of the furnace. This expansion force is transmitted through the furnace body steel structure 70 to the end column assembly along the length, compressing the first spring 514 and the second spring 524. Operators need to adjust the first adjusting nut 513 and the second adjusting nut 523 to ensure the spring compression remains constant. When the furnace 30 heats up, the refractory bricks expand, compressing the first spring 514 and the second spring 524, requiring the first adjusting nut 513 and the second adjusting nut 523 to be adjusted outwards. When the furnace 30 cools down, the expansion joints of the refractory bricks contract, releasing the first spring 514 and the second spring 524, requiring the first adjusting nut 513 and the second adjusting nut 523 to be adjusted inwards, causing the left-side column to press firmly against the furnace body steel structure 70, thus compressing the refractory bricks, ensuring the integrity of the refractory material, and extending its service life.

[0049] While the left column 41 compresses the first spring 514, the compression of the first spring 514 also exerts a reaction force on the left column 41, and at the same time transmits the expansion force to the first tie rod 512, which then transmits the expansion force to the bottom beam 21; while the left column 41 compresses the second spring 524, the compression of the second spring 524 also exerts a reaction force on the left column 41, and at the same time transmits the expansion force to the second tie rod 522, which then transmits the expansion force to the top plate 60; since the bottom beam 21 is connected to the concrete base 10 by bolts at the center of its long axis, the force and displacement of the bottom beam 21 in the long axis direction are symmetrical.

[0050] Furthermore, the tie rod structure in this embodiment is shorter, overcoming the shortcomings of difficulty in ensuring the horizontality of the tie rod when the furnace 30 is large, and the easy damage of the threads due to uneven stress. It is suitable for the furnace body structure of large smelting furnaces and blowing furnaces in the copper smelting industry. It should be explained that in the prior art, tie rods are mostly set through the bottom beam 21, with the tie rod structure exposed at opposite ends of the bottom beam 21 for connecting the columns. Therefore, the larger the furnace body, the longer its tie rod is, making it difficult to ensure the horizontality of the tie rod, which in turn affects the symmetry and uniformity of the expansion of the crossbeam in the length direction.

[0051] Furthermore, according to the principle of torque balance, when selecting the spring stiffness, the stiffness of the second spring 524 is less than the stiffness of the first spring 514. Specifically, as follows... Figure 6As shown, the second spring 524 is subjected to a force of F1, and the distance between the point of force application of the second spring 524 and the point of expansion force is H1. The first spring 514 is subjected to a force of F2, and the distance between the point of force application of the first spring 514 and the point of expansion force is H2. The expansion force is F_expansion. According to the principle of torque balance, F1×H1=F2×H2. Since H1>H2 and F1<F2, the stiffness of the second spring 524 should be less than that of the first spring 514 when selecting springs. Similarly, the stiffness of the fourth spring should also be less than that of the third spring. The purpose is to make the spring reaction force at both ends of the left column 41 and the expansion force of the furnace 30 reach a balanced state, ensuring the symmetry and uniformity of the expansion of the furnace 30 and extending the service life of the furnace 30.

[0052] Specifically, the third tie rod structure 53 includes a third fixing nut, a third tie rod, a third spring, and a third adjusting nut. One end of the third tie rod passes through the front column 43 and is fixedly connected to the base plate 22 by the third fixing nut. The other end of the third tie rod is connected to the third adjusting nut. The third spring is located between the third adjusting nut and the front column 43.

[0053] The fourth tie rod structure 54 includes a fourth fixing nut, a fourth tie rod, a fourth spring, and a fourth adjusting nut. One end of the fourth tie rod passes through the front column 43 and is fixedly connected to the top plate 60 by the fourth fixing nut. The other end of the fourth tie rod is connected to the fourth adjusting nut, and the fourth spring is disposed between the fourth adjusting nut and the front column 43.

[0054] In this embodiment, only the specific connection method between the base plate 22, the top plate 60 and the front column 43 is described. As for the connection method between the base plate 22, the top plate 60 and the rear column 44, it is the same as the connection method between the base plate 22, the top plate 60 and the front column 43, so it will not be described in detail.

[0055] Specifically, the base 10 is provided with an embedded part 110, and the bottom beam 21 rests on the embedded part 110 and is fixedly connected to the embedded part 110 by an embedded bolt 120. Further, the embedded part 110 is provided with limiting clips 130 closely attached to opposite sides of the bottom beam 21. The limiting clips 130 are used to restrict the bottom beam 21 from moving along the width direction of the base plate 22. In this embodiment, the limiting clips 130 are welded to the embedded part 110. The base 10 is a concrete base 10. The bottom beam 21 is fixed to the concrete base 10 along the centerline by the embedded bolt 120. Simultaneously, the limiting clips 130 hold the bottom beam 21 on the embedded part 110, preventing it from moving in the width direction. That is, the bottom beam 21 can only move symmetrically along the long axis centerline in the length direction, thus the force on the bottom beam 21 is only the expansion force in the length direction.

[0056] In summary, the metallurgical furnace in the above embodiments of the present invention decomposes the expansion force in the length and width directions of the furnace through the elastic structure of the furnace body, ensuring the symmetry of the furnace body expansion. Specifically, when the refractory material expands, the end column group and the side column group are connected to the bottom beam and the bottom plate as a whole through the transverse tie rod structure and the longitudinal tie rod structure, respectively. The combined structure of the bottom beam and the bottom plate ensures the symmetry and uniformity of the furnace expansion in the length and width directions, ensuring the integrity of the refractory material. It also avoids the brick joints in the refractory bricks at the furnace bottom from damaging the safety of the furnace bottom when the furnace condition fluctuates, thereby extending the service life of the refractory material. This overcomes the defect of asymmetrical expansion when the furnace body size is large, and solves the technical problem in the prior art that when the furnace body size is large, it is difficult to ensure the symmetry of its expansion, which leads to a reduction in the service life of the furnace body.

[0057] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0058] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A metallurgical furnace, characterized in that, It includes a base, a furnace bottom steel structure disposed on the base, a furnace and kiln disposed on the furnace bottom steel structure, and a furnace body elastic structure covering the furnace and kiln; The furnace bottom steel structure includes multiple bottom beams set on the base and a bottom plate set on the bottom beams. The bottom plate is used to connect the bottom end of the furnace. The multiple bottom beams are parallel to each other and spaced apart. The elastic structure of the furnace body includes an end column assembly, a side column assembly, a transverse tie rod structure, a longitudinal tie rod structure, and a top plate. The top plate is located at the top of the furnace. The end column assembly includes a left end column and a right end column respectively set at the left and right ends of the furnace. The left end column and the right end column correspond one-to-one with the left and right ends of the bottom beam. The side column assembly includes a front side column and a rear side column symmetrically set on the front and rear sides of the furnace. The transverse tie rod structure includes a first tie rod structure and a second tie rod structure. The left end column and the right end column are respectively connected to the left and right ends of the bottom beam through the first tie rod structure. The left and right sides of the top plate are respectively connected to the left end column and the right end column through the second tie rod structure. The longitudinal tie rod structure includes a third tie rod structure and a fourth tie rod structure. The front side column and the rear side column are respectively connected to the front and rear ends of the bottom plate through the third tie rod structure. The front and rear sides of the top plate are respectively connected to the front side column and the rear side column through the fourth tie rod structure. The bottom beam is provided with a plurality of first circular holes, which are spaced apart along the length of the bottom beam. The bottom plate is provided with a plurality of mounting holes corresponding to the first circular holes. The first circular holes are fixedly connected to the mounting holes by a bolt so that the bottom beam and the bottom plate are integrated. The mounting holes include second circular holes and kidney-shaped holes. The second circular holes are spaced apart along the transverse central axis of the base plate, and the kidney-shaped holes are symmetrically distributed on opposite sides of the second circular holes. The long side of the kidney-shaped holes is set along the width direction of the base plate. The base is provided with embedded parts, the bottom beam rests on the embedded parts and is fixedly connected to the embedded parts by an embedded bolt, the base is a concrete base, and the bottom beam is fixedly connected to the concrete base along the long axis center line by an embedded bolt. The embedded part is provided with limiting clips that are close to the opposite sides of the bottom beam. The limiting clips are used to restrict the bottom beam from moving along the width direction of the bottom plate.

2. The metallurgical furnace according to claim 1, characterized in that, The first tie rod structure includes a first fixing nut, a first tie rod, and a first adjusting nut. One end of the first tie rod passes through the left end column and is fixedly connected to the bottom beam by the first fixing nut. The other end of the first tie rod is connected to the first adjusting nut, and the first adjusting nut abuts against the surface of the left end column. The second tie rod structure includes a second fixing nut, a second tie rod, and a second adjusting nut. One end of the second tie rod passes through the left end column and is fixedly connected to the top plate by the second fixing nut. The other end of the second tie rod is connected to the second adjusting nut, which abuts against the surface of the left end column.

3. The metallurgical furnace according to claim 2, characterized in that, A first spring is provided between the first adjusting nut and the left end column, and a second spring is provided between the second adjusting nut and the left end column.

4. The metallurgical furnace according to claim 3, characterized in that, The stiffness of the second spring is less than that of the first spring.

5. The metallurgical furnace according to claim 1, characterized in that, The third tie rod structure includes a third fixing nut, a third tie rod, a third spring, and a third adjusting nut. One end of the third tie rod passes through the front column and is fixedly connected to the base plate by the third fixing nut. The other end of the third tie rod is connected to the third adjusting nut. The third spring is located between the third adjusting nut and the front column. The fourth tie rod structure includes a fourth fixing nut, a fourth tie rod, a fourth spring, and a fourth adjusting nut. One end of the fourth tie rod passes through the front column and is fixedly connected to the top plate by the fourth fixing nut. The other end of the fourth tie rod is connected to the fourth adjusting nut. The fourth spring is located between the fourth adjusting nut and the front column.

6. The metallurgical furnace according to claim 1, characterized in that, A refractory layer is constructed between the furnace and the bottom plate, and a steel structure is provided around the furnace.

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