Fixing device for slag outlet chute of oxygen-enriched bottom blowing furnace

Abstract

The utility model relates to the technical field of non-ferrous metal metallurgy, in particular to an oxygen-enriched bottom-blowing furnace slag outlet chute fixing device which comprises a bottom-blowing furnace, a flue collecting channel and a slag outlet, the flue collecting channel and the slag outlet are arranged on the bottom-blowing furnace, the slag outlet is detachably connected with a chute, the chute is connected with a fixing support, and the bottom of the fixing support is movably connected with a supporting bottom plate. The circulating water tank is arranged on the supporting bottom plate, and the circulating water pipe is detachably connected between the circulating water tank and the chute, so that the collecting effect of smoke at the slag outlet is improved, the operation site around the slag outlet is expanded, the workload of workers is reduced, and the problems that in the prior art, the chute can rotate along with the bottom blowing furnace, collection of smoke generated during slag discharging is affected, and the slag discharging efficiency is improved are solved. The problems that in the prior art, the bottom blowing furnace is not needed, rotation of the bottom blowing furnace is limited due to the existence of a chute during overhaul each time, equipment is prone to being damaged, the overhaul workload is increased, a connecting pipe connected with a circulating water tank is prone to being straightened or bent in the long-time using process, water leakage is caused, and the unnecessary smelting cost is increased are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of non-ferrous metal smelting, and particularly relates to a fixing device for a slag chute at the slag outlet of an oxygen-enriched bottom-blown furnace. Background Art

[0002] Oxygen-enriched bottom-blown copper smelting is a new copper smelting process developed independently in China, and is mainly applied in the copper smelting and lead smelting industries. The core equipment is an oxygen-enriched bottom-blown furnace. The oxygen-enriched bottom-blown furnace sprays gas into the molten bath through a lance nozzle, so that the molten bath is in a strong stirring state. The furnace charge is added from the top of the furnace to the surface of the molten bath and is quickly involved in the stirred melt, forming good heat transfer and mass transfer conditions. The oxidation reaction releases a large amount of heat, causing the furnace charge to melt quickly, generating copper matte and slag.

[0003] The oxygen-enriched bottom-blown furnace uses continuous and uninterrupted addition of ore powder materials for smelting, generating a large amount of slag. The slag outlet discharges slag frequently. Due to the large space at the slag outlet, the flue gas generated during slag discharge is not easy to be completely collected. If not careful, there will be flue gas overflow, causing low-altitude pollution. In order to control the flue gas, the annular collecting flue at the slag outlet is continuously reformed, and the flue gas escape space is reduced. However, due to the limitation of the first-section chute, the outlet space can no longer be compressed, and the flue gas collection cannot reach the most ideal state; during each major overhaul, the furnace body needs to rotate 360 degrees. Since the chute is fixed on the furnace body and rotates with the furnace body, the annular collecting flue and the smoke hood above the chute need to be cut off, otherwise the equipment will be damaged during the rotation process, increasing the maintenance workload.

[0004] A metal flexible connecting pipe is used to connect the furnace body section and the fixed section of the circulating water tank, so that it will not affect the rotation of the furnace body. However, each time the furnace body rotates, this pipe section will be straightened and bent, and it is extremely easy to leak water during long-term use. It needs to be replaced at least 2 - 3 times a year, increasing unnecessary smelting costs. Summary of the Invention

[0005] The purpose of the utility model is to provide a fixing device for a slag chute at the slag outlet of an oxygen-enriched bottom-blown furnace, which overcomes the problems in the prior art that the chute rotates with the bottom-blown furnace, affecting the collection of flue gas generated during slag discharge, and the presence of the chute limits the rotation of the bottom-blown furnace during each major overhaul, easily damaging the equipment, thereby increasing the maintenance workload, and the connecting pipe connected to the circulating water tank is easily straightened or bent during long-term use, resulting in water leakage and increasing unnecessary smelting costs.

[0006] To achieve the above purpose, the technical solution adopted by the utility model to solve its technical problems is as follows:

[0007] A fixed device for the slag chute at the slag discharge opening of an oxygen-enriched bottom-blown furnace is designed. The chute can be detached from the bottom-blown furnace and will not rotate with the bottom-blown furnace during maintenance. The connecting metal hose of the circulating water tank is replaced with a steel pipe, which improves the collection effect of the flue gas at the slag discharge opening and is beneficial to environmental protection. At the same time, the working area around the slag discharge opening can be expanded, indirectly reducing the workload of the staff. The specific scheme is as follows:

[0008] A fixed device for the slag chute at the slag discharge opening of an oxygen-enriched bottom-blown furnace, comprising a bottom-blown furnace, a collecting flue and a slag discharge opening arranged on the bottom-blown furnace, and the slag discharge opening is detachably connected with a chute;

[0009] The chute is connected with a fixed support, and the bottom of the fixed support is movably connected with a support bottom plate;

[0010] A circulating water tank is arranged on the support bottom plate, and a circulating water pipe is detachably connected between the circulating water tank and the chute.

[0011] Preferably, the circulating water pipe is a metal pipe. One end of the circulating water pipe is connected with the circulating water tank through a flange, and the other end of the circulating water pipe is connected with the chute through a flange.

[0012] Preferably, a plug-in part is connected to the outer end of the slag discharge opening, and a first annular ear plate is arranged at the connection part between the plug-in part and the slag discharge opening;

[0013] The lower end of the chute is inclined away from the bottom-blown furnace, and a connecting part is arranged at the upper end of the chute. The plug-in part is inserted into the connecting part;

[0014] A second annular ear plate is arranged at the outer end of the connecting part, and the second annular ear plate corresponds to the first annular ear plate.

[0015] Preferably, at least three grooves are annularly arranged at the edge position of the first annular ear plate, and at least three groups of connecting bolts corresponding to the grooves are annularly arranged on the outer side of the second annular ear plate;

[0016] One end of the connecting bolt is rotatably connected to the second annular ear plate, the other end of the connecting bolt can be inserted into the groove, and a nut is threadedly connected and abuts against the inner side of the first annular ear plate.

[0017] Preferably, the fixed support includes an annular clamp and two support rods. The annular clamp clamps the upper end of the chute, and the upper ends of the two support rods are respectively hinged on both sides of the annular clamp. The lower ends of the two support rods are movably connected to the support bottom plate.

[0018] Preferably, a first sliding groove is formed in the middle of the left side of the supporting bottom plate. A first sliding block is slidably connected in the first sliding groove. The first sliding block is threadedly connected with a threaded rod, and the threaded rod is rotatably connected in the first sliding groove;

[0019] The top of the first sliding block is connected with a horizontally distributed sliding rod, and the sliding rod is slidably connected with the top of the supporting bottom plate;

[0020] A second sliding groove is arranged at the top of the sliding rod along the length direction. Two symmetrically arranged second sliding blocks are slidably connected in the second sliding groove. The second sliding blocks are threadedly connected with an oppositely threaded rod, and the oppositely threaded rod is rotatably connected in the second sliding groove;

[0021] The lower ends of the two support rods are respectively hinged to the two second sliding blocks.

[0022] Preferably, sliding grooves are arranged on both sides of the top of the supporting bottom plate along the length direction. Sliding blocks are respectively arranged on both sides of the bottom of the sliding rod, and the sliding blocks are slidably connected in the sliding grooves.

[0023] The beneficial effects of the utility model are as follows:

[0024] 1. After the chute of the utility model is separated from the bottom blowing furnace, the bottom blowing furnace will not rotate with the chute. In this way, the retaining wall space around the original slag discharge port can be reduced, so that the flue gas generated during slag discharging can be better collected through the collecting flue, which is beneficial to environmental protection; when the bottom blowing furnace needs to rotate 360 degrees during major repairs, it will not be affected, and the retaining wall and collecting flue around the slag discharge port do not need to be demolished and cut, reducing the maintenance workload.

[0025] 2. The utility model does not require a metal flexible connecting pipe to connect the circulating water tank, but uses a steel pipe for connection. In this way, the input cost of the metal hose can be reduced, energy can be saved and consumption can be reduced, and the workload of the staff can be reduced.

[0026] 3. The chute of the utility model can move driven by the fixed support. After moving, the chute will be separated from the bottom blowing furnace, so as to provide sufficient maintenance space for the maintenance work of the bottom blowing furnace, avoid damage to the equipment, and reduce the input cost of maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the fixed installation structure of the chute in the utility model;

[0028] Figure 2 It is a schematic diagram of the butt joint structure of the chute in the utility model;

[0029] Figure 3 It is a schematic diagram of the connection relationship between the fixed support and the supporting bottom plate in the utility model;

[0030] Figure 4 This is a schematic top view of the support base plate in the present utility model;

[0031] Figure 5 This is a schematic view of the structure of the sliding rod in the present utility model.

[0032] In the figure: 1-bottom-blowing furnace; 2-collecting flue; 3-slag outlet; 31-first annular ear plate; 311-groove; 32-insertion part; 4-chute; 41-connecting part; 42-second annular ear plate; 43-connecting bolt; 44-nut; 5-fixed bracket; 51-supporting rod; 52-annular clamp; 521-fastening ear; 522-connecting ear; 6-circulating water tank; 61-circulating water pipe; 7-support base plate; 71-first sliding groove; 72-sliding groove; 73-sliding rod; 731-first sliding block; 732-sliding block; 733-second sliding groove; 74-threaded rod; 741-second adjusting knob; 75-opposite-threaded rod; 751-first adjusting knob; 76-second sliding block; 77-anchor. Detailed implementation manners

[0033] In order to make the purpose, technical solutions and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below in combination with embodiments and drawings. The illustrative embodiments and descriptions of the present utility model are only used to explain the present utility model and do not limit the present utility model.

[0034] In the following description, a large number of specific details are set forth in order to provide a thorough understanding of the present utility model. However, it is obvious to those of ordinary skill in the art that: It is not necessary to adopt these specific details to implement the present utility model. In other embodiments, well-known structures, circuits, materials or methods are not specifically described in order to avoid obscuring the present utility model.

[0035] Throughout the specification, references to "one embodiment", "embodiment", "one example" or "example" mean that a particular feature, structure, or characteristic described in connection with the embodiment or example is included in at least one embodiment of the present utility model. Thus, the phrases "one embodiment", "embodiment", "one example" or "example" appearing throughout the specification do not necessarily all refer to the same embodiment or example. Additionally, the particular features, structures, or characteristics may be combined in any suitable combination and / or sub-combination in one or more embodiments or examples. Further, those of ordinary skill in the art should understand that the diagrams provided herein are for illustrative purposes only and are not necessarily drawn to scale. The term "and / or" used herein includes any and all combinations of one or more of the associated listed items.

[0036] In the description of the present utility model, the orientation or positional relationship indicated by the terms "front", "rear", "left", "right", "upper", "lower", "vertical", "horizontal", "high", "low", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the protection scope of the present utility model.

[0037] As Figures 1-5 shown, the present utility model provides a fixing device for the slag chute at the slag outlet of an oxygen-enriched bottom-blown furnace, which includes a bottom-blown furnace 1, a collecting flue 2 and a slag outlet 3 provided on the bottom-blown furnace 1. The slag outlet 3 is detachably connected to a chute 4, so that the chute 4 can be separated from the bottom-blown furnace 1 during the maintenance process, reducing the retaining wall space around the original slag outlet, enabling the flue gas generated during slag discharging to be better collected through the collecting flue 2, which is beneficial to environmental protection. The chute 4 is connected to a fixing bracket 5, and the bottom of the fixing bracket 5 is movably connected to a supporting bottom plate 7. The fixing bracket 5 supports and fixes the chute 4, and controls the height of the chute 4 and the distance from the slag outlet 3, avoiding the removal and cutting of the retaining wall and the collecting flue 2 around the slag outlet 3 during the rotation of the bottom-blown furnace 1, providing an effective rotation space for it, preventing the equipment from getting stuck, and reducing the maintenance workload.

[0038] A circulating water tank 6 is provided on the supporting bottom plate 7. A circulating water pipe 61 is detachably connected between the circulating water tank 6 and the chute 4. By detachably connecting the circulating water tank 6 through the circulating water pipe 61, it can also be disassembled during the disassembly process of the chute 4, preventing the circulating water pipe 61 from being straightened or bent, resulting in water leakage, and avoiding the replacement work of the circulating water pipe 61, so as to reduce the input cost of smelting. At the same time, it also provides a certain degree of convenience for the rotational maintenance of the bottom-blown furnace 1.

[0039] In the above solution, the circulating water pipe 61 is a metal pipe. One end of the circulating water pipe 61 is connected to the circulating water tank 6 through a flange, and the other end of the circulating water pipe 61 is connected to the chute 4 through a flange.

[0040] As an optimized technical solution of the present utility model, the circulating water pipe 61 is made of a metal pipe and is connected to the circulating water tank 6 and the chute 4 in a flange connection manner, which is not only conducive to the disassembly and assembly work of the circulating water pipe 61, but also can avoid the straightening or bending of the circulating water pipe 61, reducing the loss of the circulating water pipe 61 during the maintenance rotation process.

[0041] In the above solution, a plug-in portion 32 is connected to the outer end of the slag discharge port 3. A first annular ear plate 31 is provided at the connection between the plug-in portion 32 and the slag discharge port 3. The lower end of the chute 4 is inclined away from the bottom blowing furnace 1. A connection portion 41 is provided at the upper end of the chute 4. The plug-in portion 32 is inserted into the connection portion 41. A second annular ear plate 42 is provided at the outer end of the connection portion 41. The second annular ear plate 42 corresponds to the first annular ear plate 31.

[0042] As an optimized technical solution of the present utility model, the plug-in portion 32 can be inserted into the connection portion 41 to improve the effectiveness of its connection. And through the close fit of the first annular ear plate 31 and the second annular ear plate 42, the chute 4 can be stably installed on the bottom blowing furnace 1.

[0043] In the above solution, at least three grooves 311 are annularly arrayed at the edge position of the first annular ear plate 31. At least three groups of connection bolts 43 corresponding to the grooves 311 are annularly arrayed on the outer side of the second annular ear plate 42. One end of the connection bolt 43 is rotatably connected to the second annular ear plate 42. The other end of the connection bolt 43 can be turned into the groove 311 and is threadedly connected with a nut 44 that abuts against the inner side of the first annular ear plate 31.

[0044] As an optimized technical solution of the present utility model, the connection bolt 43 can be turned into the groove 311 and fastened by the nut 44 to improve the fit degree of the first annular ear plate 31 and the second annular ear plate 42 and ensure the stability of the connection of the chute 4. At the same time, this connection method of the connection bolt 43 being inserted into the groove 3211 is not only convenient for disassembly and assembly but also can prevent the loss of each component.

[0045] In the above solution, the fixed bracket 5 includes an annular clamp 52 and two support rods 51. The annular clamp 52 clamps the upper end of the chute 4. The upper ends of the two support rods 51 are respectively hinged on both sides of the annular clamp 52. The lower ends of the two support rods 51 are movably connected to the support bottom plate 7.

[0046] As an optimized technical solution of the present utility model, corresponding fastening ear parts 521 are provided on the upper side of the annular clamp 52. The annular clamp 52 is fixed on the connection portion 41 by bolt connection and fastening, thereby ensuring the effective fixed support of the chute 4. At the same time, connection ears 522 are provided on both sides of the annular clamp 52. The upper ends of the support rods 51 are hinged on the connection ears 522, which can support and lift the height of the annular clamp 52.

[0047] In the above solution, a first sliding groove 71 is provided in the middle of the left side of the supporting bottom plate 7. A first sliding block 731 is slidably connected in the first sliding groove 71. The first sliding block 731 is threadedly connected to a threaded rod 74. The threaded rod 74 is rotatably connected in the first sliding groove 71. The top of the first sliding block 731 is connected to a horizontally distributed sliding rod 73. The sliding rod 73 is slidably connected to the top of the supporting bottom plate 7. A second sliding groove 733 is provided in the top of the sliding rod 73 along the length direction. Two symmetrically arranged second sliding blocks 76 are slidably connected in the second sliding groove 733. The second sliding block 76 is threadedly connected to a reverse threaded rod 75. The reverse threaded rod 75 is rotatably connected in the second sliding groove 733. The lower ends of the two support rods 51 are respectively hinged to the two second sliding blocks 76.

[0048] As an optimized technical solution of the present utility model, the lower end of the support rod 51 is hinged to the second sliding block 76. A first adjustment knob 751 is provided at the outer end of the reverse threaded rod 75. By driving the reverse threaded rod 75 to rotate through the first adjustment knob 751, the two second sliding blocks 76 can be driven to approach or move away from each other, so that the annular clamp 52 is lifted or lowered under the drive of the support rod 51 to calibrate the installation of the chute 4 and the slag outlet 3.

[0049] At the same time, a second adjustment knob 741 is provided at the outer end of the threaded rod 74. By driving the threaded rod 74 to rotate through the second adjustment knob 741, the first sliding block 731 can be driven to slide in the first sliding groove 71, so that the sliding rod 73 moves under the drive of the first sliding block 731, and then the fixed bracket 5 is driven to move, thereby driving the chute 4 to approach or move away from the slag outlet 3, so as to facilitate the collection of the flue gas at the slag outlet 3 and avoid the clamping and damage of the equipment during the rotation of the bottom blowing furnace 1.

[0050] In the above solution, sliding grooves 72 distributed along the length direction are provided on both sides of the top of the supporting bottom plate 7. Sliding blocks 732 are respectively provided on both sides of the bottom of the sliding rod 73. The sliding blocks 732 are slidably connected in the sliding grooves 72.

[0051] As an optimized technical solution of the present utility model, in order to improve the stability and smoothness of the sliding rod 73 during the sliding process, sliding grooves 72 facilitating the sliding of the sliding blocks 732 are provided on both sides of the top of the supporting bottom plate 7 to play a guiding role, and anchor feet 77 are respectively provided at the four corners of the bottom of the supporting bottom plate 7 to lift the supporting bottom plate 7 off the ground to prevent it from contacting the ground and accelerating its rusting, resulting in a reduction in service life.

[0052] Specific implementation cases:

[0053] The chute 4 installed at the upper slag outlet 3 of the bottom-blown converter 1 has always been fixed to the bottom-blown converter 1 and rotates with the bottom-blown converter 1. A relatively large space is required in this area, and the flue gas generated during slag discharge is not easily collected. After continuous improvement, the flue gas at the slag outlet 3 has been improved, but enough rotating space needs to be reserved in this area. The large space causes the accumulation of flue gas, which is not conducive to flue gas collection and environmental protection. Therefore, the fixing method of the chute 4 has been reformed.

[0054] When the bottom-blown converter 1 needs to be rotated for maintenance, the nut 44 can be loosened and the connecting bolt 43 can be rotated to make the fit between the first annular ear plate 31 and the second annular ear plate 42 lose the fastening effect. Secondly, by rotating the second adjustment knob 741 to drive the threaded rod 74 to rotate, and then driving the first sliding block 731 to slide outwards along the first sliding groove 71, so that the chute 4 is driven by the fixing bracket 5 to move away from the bottom-blown converter 1, and the chute 4 and the fixing bracket 5 are moved away by moving the support bottom plate 7 to expand the working space around the slag outlet 3, avoiding damage caused by the jamming of equipment during the rotation of the bottom-blown converter 1, and indirectly reducing the workload of the staff.

[0055] After the maintenance is completed, the chute 4 is moved to the lower part of the slag outlet 3 through the support bottom plate 7. By driving the reverse threaded rod 75 to rotate through the first adjustment knob 751, the second sliding blocks 76 approach each other, so that the lower ends of the support rods 51 approach each other and lift the annular clamp 52, docking the connecting part 41 of the chute 4 with the insertion part 32 of the slag outlet 3, and fastening by inserting the connecting bolt 43 into the groove 311 and using the nut 44 to complete the installation work.

[0056] At the same time, the detachable metal circulating water pipe 61 is not only beneficial to the disassembly and assembly work of the circulating water pipe 61, but also can avoid the straightening or bending of the circulating water pipe 61, reducing the loss of the circulating water pipe 61 during the maintenance rotation process.

[0057] In this application, the chute 4 is separated from the bottom-blown converter 1 and is no longer fixed to the bottom-blown converter 1. The chute 4 is fixed to the lower part of the slag outlet 3 obliquely by using the fixing bracket 5. In this way, there is no need to reserve rotating space on both sides, and the retaining wall at this place can be directly reduced to the side of the chute 4, so that the flue gas generated by slag discharge can directly enter the collecting flue 2 for collection, and the effect is good. After the transformation of the chute 4, the usage amount of the metal flexible connecting pipe connected to the chute 4 at the slag outlet 3 is reduced, the smelting cost is reduced, and at the same time, the slag spraying area is reduced after the space is compressed, and the workload of the operator at the slag outlet 3 is relatively reduced.

[0058] The specific embodiments described above further elaborate on the purpose, technical solution, and beneficial effects of the present utility model. It should be understood that the above description is only the specific embodiments of the present utility model and is not used to limit the protection scope of the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A device for fixing a slag outlet chute of an oxygen-enriched bottom-blown furnace, comprising a bottom-blown furnace (1), and a smoke collecting duct (2) and a slag outlet (3) arranged on the bottom-blown furnace (1), characterized in that: The slag outlet (3) is detachably connected to a chute (4); The chute (4) is connected to a fixed bracket (5), and the bottom of the fixed bracket (5) is movably connected to a supporting bottom plate (7); A circulating water tank (6) is provided on the supporting bottom plate (7), and a circulating water pipe (61) is detachably connected between the circulating water tank (6) and the chute (4).

2. The fixing device for the slag outlet chute of an oxygen-enriched bottom blowing furnace according to claim 1, characterized in that: The circulating water pipe (61) is a metal pipe. One end of the circulating water pipe (61) is connected to the circulating water tank (6) via a flange, and the other end of the circulating water pipe (61) is connected to the chute (4) via a flange.

3. The fixing device for the slag outlet chute of an oxygen-enriched bottom blowing furnace according to claim 1, characterized in that: The outer end of the slag outlet (3) is connected to a plug-in portion (32), and a first annular ear plate (31) is provided at the connection between the plug-in portion (32) and the slag outlet (3); The lower end of the chute (4) is arranged obliquely away from the bottom blowing furnace (1), the upper end of the chute (4) is provided with a connecting portion (41), and the plug-in portion (32) is plugged into the connecting portion (41); A second annular ear plate (42) is provided at the outer end of the connecting portion (41), and the second annular ear plate (42) corresponds to the first annular ear plate (31).

4. The fixing device for the slag outlet chute of an oxygen-enriched bottom blowing furnace according to claim 3 is characterized in that: The first annular ear plate (31) has at least three grooves (311) in an annular array at the edge thereof, and the second annular ear plate (42) has at least three groups of connecting bolts (43) corresponding to the grooves (311) in an annular array at the outer side thereof; One end of the connecting bolt (43) is rotatably connected to the second annular ear plate (42), and the other end of the connecting bolt (43) can be rotated into the groove (311) and is threadedly connected to a nut (44) abutting against the inner side of the first annular ear plate (31).

5. The fixing device for the slag outlet chute of an oxygen-enriched bottom blowing furnace according to claim 1, characterized in that: The fixed bracket (5) comprises an annular clamp (52) and two support rods (51), wherein the annular clamp (52) is clamped on the upper end of the chute (4), the upper ends of the two support rods (51) are respectively hinged on both sides of the annular clamp (52), and the lower ends of the two support rods (51) are movably connected to the support bottom plate (7).

6. The fixing device for the slag outlet chute of an oxygen-enriched bottom blowing furnace according to claim 5, characterized in that: A first sliding groove (71) is provided in the middle of the left side of the supporting bottom plate (7), a first sliding block (731) is slidably connected in the first sliding groove (71), a threaded rod (74) is threadedly connected to the first sliding block (731), and the threaded rod (74) is rotatably connected in the first sliding groove (71); The top of the first sliding block (731) is connected to a laterally distributed sliding rod (73), and the sliding rod (73) is slidably connected to the top of the supporting bottom plate (7); A second sliding groove (733) is provided in the extension direction of the top of the sliding rod (73), two symmetrical second sliding blocks (76) are slidably connected in the second sliding groove (733), the second sliding blocks (76) are threadedly connected to a heterogeneous threaded rod (75), and the heterogeneous threaded rod (75) is rotatably connected in the second sliding groove (733); The lower ends of the two support rods (51) are hinged to the two second sliding blocks (76) respectively.

7. The fixing device for the slag outlet chute of an oxygen-enriched bottom blowing furnace according to claim 6, characterized in that: Sliding grooves (72) extending in the direction of extension are provided on both sides of the top of the supporting bottom plate (7), and sliding blocks (732) are provided on both sides of the bottom of the sliding rod (73), respectively. The sliding blocks (732) are slidably connected in the sliding grooves (72).

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