Slag filling prevention device for blast furnace ironmaking tuyere

Abstract

The utility model provides a blast furnace ironmaking tuyere anti-slag filling device, including connecting pipe, blast furnace pipe, rotating ring, fan blade and cleaning rod, rotating ring is provided between connecting pipe and blast furnace pipe and is respectively with connecting pipe and blast furnace pipe running fit, rotating shaft is coaxially rotatingly connected in rotating ring, connecting pipe or blast furnace pipe is provided with drive subassembly, and cleaning rod is provided with cleaning rod. The fan blades are connected to the rotating shaft, an air supply plate is arranged in the blast furnace pipe and provided with ventilation holes for hot air to pass through, and the cleaning rod is connected to the rotating shaft. According to the slag filling prevention device for the blast furnace ironmaking tuyere provided by the utility model, the rotating ring can circumferentially rotate relative to the connecting pipe and the blast furnace pipe under the driving of the driving assembly, so that hot air is pushed towards one side of the blast furnace pipe by utilizing the fan blades connected in the rotating ring, and enters the blast furnace in time, thereby improving the ironmaking efficiency of the blast furnace and prolonging the service life of the blast furnace. The cleaning rod can be driven by the rotating ring to clean the surface of the air supply plate, effective conveying of airflow is guaranteed, the slag filling phenomenon of the tuyere is avoided, and safe operation of the blast furnace is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of blast furnace ironmaking, and more specifically relates to a blast furnace ironmaking tuyere slag filling prevention device. Background Art

[0002] The tuyere is a key component of an iron-making blast furnace. Its function is to blow high-temperature hot air into the blast furnace to provide the oxygen required for iron-making, so as to help coal powder and iron ore to burn and reduce. The high-temperature hot air blown in from the blast furnace tuyere and the coke at the bottom of the furnace are oxidized and burned to generate CO. CO is reduced to the original iron in the form of oxide during the high-temperature rising process. The iron-making operation is realized through the above process.

[0003] During the operation of a blast furnace, if the air supply is suddenly stopped, slag will fill the tuyere of the blast furnace. The slag filling will also cause changes in the thermal conditions inside the blast furnace, making the heat distribution inside the blast furnace uneven, affecting the stable operation of the blast furnace. Improper handling of the slag filling accident will lead to serious accidents and environmental pollution, and even endanger the lives of personnel and affect the normal production of the blast furnace. Utility Model Content

[0004] The utility model aims to provide a blast furnace ironmaking tuyere anti-slag filling device, which can effectively avoid the situation of slag filling in the blast furnace tuyere and ensure the normal operation and safe production of the blast furnace.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: to provide a blast furnace ironmaking tuyere anti-slag filling device, including a connecting pipe, a blast furnace pipe, a rotating ring, fan blades and a cleaning rod, the rotating ring is arranged between the connecting pipe and the blast furnace pipe, and is respectively rotatably matched with the connecting pipe and the blast furnace pipe, a rotating shaft is coaxially connected inside the rotating ring, a driving component for driving the rotating ring to rotate circumferentially is provided on the connecting pipe or the blast furnace pipe, the fan blades are connected to the rotating shaft, and can rotate with the rotating ring to supply air into the blast furnace pipe, an air supply plate is provided in the blast furnace pipe, and the air supply plate is provided with ventilation holes for hot air to pass through, and the cleaning rod is connected to the rotating shaft, and can rotate with the rotating ring to clean the slag on the surface of the air supply plate.

[0006] In a possible implementation, inner grooves are respectively provided on the adjacent end surfaces of the connecting tube and the blast furnace tube, and outer convex rings that slide in cooperation with the inner grooves are respectively provided on the two end surfaces of the rotating ring.

[0007] In one possible implementation, the driving assembly includes a rotating driving member, a gear and a ring gear. The rotating driving member is arranged on the connecting tube, the gear is connected to the driving end of the rotating driving member, the ring gear is sleeved on the outer periphery of the rotating ring and meshes with the gear. The ring gear can drive the rotating ring to rotate under the drive of the gear.

[0008] In some embodiments, a fixing hoop is sleeved on the outer periphery of the connecting pipe, and the rotary driving member is connected to the fixing hoop.

[0009] In a possible implementation, a mounting frame is provided on the inner side of the rotating ring, the mounting frame includes two support rods arranged in a crisscross pattern, and the fan blades include a plurality of blades distributed on the periphery of the rotating shaft.

[0010] In one possible implementation, the rotating shaft passes through the air supply plate, the fan blades are arranged on one side of the air supply plate close to the connecting pipe, and the cleaning rod is arranged on the other side of the air supply plate. The cleaning rod is arranged adjacent to the plate surface of the air supply plate and is used to clean the slag on the air supply plate.

[0011] In some embodiments, the outer end of the rotating shaft is further connected to a slag blocking frame, which includes a main rod extending radially along the rotating shaft and auxiliary rods connected to both sides of the main rod, and the auxiliary rods are arranged perpendicular to the main rod.

[0012] In a possible implementation, the ventilation holes include a plurality of main air supply holes spaced apart along the circumference of the air supply plate. The main air supply holes extend along the radial direction of the air supply plate, and the outer end widths of the main air supply holes gradually increase.

[0013] In some embodiments, an auxiliary air supply hole is provided on the air supply plate and is located between two adjacent main air supply holes. The auxiliary air supply hole is arranged close to the outer end of the main air supply hole. The auxiliary air supply hole extends radially along the air supply plate, and the outer end width of the auxiliary air supply hole gradually increases.

[0014] In some embodiments, a support frame is provided in the blast furnace tube adjacent to the air supply plate. The support frame is located at one end of the air supply plate close to the rotating ring. The support frame is provided with a through hole for the rotating shaft to pass through. The rotating shaft is rotatably connected to the through hole.

[0015] Compared with the prior art, the solution shown in the embodiment of the present application is that, driven by the driving component, the rotating ring can rotate circumferentially relative to the connecting pipe and the blast furnace pipe, so that the fan blades connected to the rotating ring can push the hot air to one side of the blast furnace pipe, so that the hot air can enter the blast furnace in time, thereby improving the ironmaking efficiency of the blast furnace; the cleaning rod can clean the surface of the air supply plate under the drive of the rotating ring to ensure the effective delivery of the air flow; even when the hot air stops being supplied, the fan blades can still be used to blow air into the blast furnace to avoid slag filling at the tuyere, thereby ensuring the safe operation of the blast furnace. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0017] Figure 1A schematic diagram of the structure of a blast furnace ironmaking tuyere slag filling prevention device provided by an embodiment of the utility model;

[0018] Figure 2 For the utility model embodiment Figure 1 A schematic diagram of the structure of the middle connecting pipe, the rotating drive member and the gear;

[0019] Figure 3 For the utility model embodiment Figure 1 Schematic diagram of the structure of the central rotating ring, fan, cleaning rod and slag retaining frame;

[0020] Figure 4 For the utility model embodiment Figure 1 Schematic diagram of the structure of medium and high-blast furnace tubes.

[0021] Among them, the reference numerals in the figure are:

[0022] 1. Connecting pipe; 11. Fixing hoop; 2. Blast furnace pipe; 21. Air supply plate; 22. Ventilation hole; 23. Main air supply hole; 24. Auxiliary air supply hole; 25. Support frame; 26. Through hole; 3. Rotating ring; 31. Rotating shaft; 32. Mounting frame; 33. Support rod; 4. Fan blade; 41. Blade; 5. Cleaning rod; 61. Inner groove; 62. Outer convex ring; 7. Driving assembly; 71. Rotating driving member; 72. Gear; 73. Gear ring; 8. Slag retaining frame; 81. Main rod; 82. Auxiliary rod. DETAILED DESCRIPTION

[0023] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0024] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or indirectly on the other element. It should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "back", "top", "bottom", "inside", "outside", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the 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, and therefore cannot be understood as a limitation on the utility model. The terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the utility model, the meaning of "several" is two or more, unless otherwise clearly and specifically defined.

[0025] Please also read Figures 1 to 4 , the blast furnace ironmaking tuyere anti-slag filling device provided by the utility model is now described. The blast furnace ironmaking tuyere anti-slag filling device comprises a connecting pipe 1, a blast furnace tube 2, a rotating ring 3, a fan blade 4 and a cleaning rod 5. The rotating ring 3 is arranged between the connecting pipe 1 and the blast furnace tube 2, and is respectively rotatably matched with the connecting pipe 1 and the blast furnace tube 2. A rotating shaft 31 is coaxially connected to the rotating ring 3. A driving component 7 for driving the rotating ring 3 to rotate circumferentially is provided on the connecting pipe 1 or the blast furnace tube 2. The fan blade 4 is connected to the rotating shaft 31 and can rotate with the rotating ring 3 to supply air into the blast furnace tube 2. An air supply plate 21 is provided in the blast furnace tube 2. The air supply plate 21 is provided with ventilation holes 22 for hot air to pass through. The cleaning rod 5 is connected to the rotating shaft 31 and can rotate with the rotating ring 3 to clean the slag on the surface of the air supply plate 21.

[0026] Compared with the prior art, the device for preventing slag filling at the blast furnace ironmaking tuyere provided in the present embodiment can prevent slag filling at the blast furnace ironmaking tuyere relative to the connecting pipe 1 and the blast furnace pipe 2 under the drive of the driving component 7, so that the fan blades 4 connected to the rotating ring 3 can push the hot air to the side of the blast furnace pipe 2, so that the hot air can enter the blast furnace in time, thereby improving the ironmaking efficiency of the blast furnace; the cleaning rod 5 can clean the surface of the air supply plate 21 under the drive of the rotating ring 3 to ensure the effective transportation of the air flow; even when the hot air stops being supplied, the fan blades 4 can still be used to blow air into the blast furnace to avoid slag filling at the tuyere, thereby ensuring the safe operation of the blast furnace.

[0027] During actual installation, the connecting pipe 1 is connected to the external hot air pipe, the blast furnace pipe 2 is connected to the blast furnace air inlet, and the hot air pipe delivers the hot air to the blast furnace pipe 2 through the connecting pipe 1, so as to realize the orderly delivery of the hot air to the blast furnace. The setting of the air supply plate 21 not only ensures the orderly delivery of the hot air to the blast furnace pipe 2, but also prevents the slag from splashing directly from the blast furnace pipe 2 to the side of the connecting pipe 1 to damage the rotating ring 3 and the fan blade 4. The setting of the cleaning rod 5 can effectively remove the slag on the air supply plate 21, avoid blocking the ventilation hole 22, and play a good role in promoting the continuous and stable production of the blast furnace.

[0028] In one possible implementation, see Figures 1 to 4 Inner grooves 61 are respectively provided on the adjacent end surfaces of the connecting tube 1 and the blast furnace tube 2, and outer convex rings 62 that slide in cooperation with the inner grooves 61 are respectively provided on the two end surfaces of the rotating ring 3.

[0029] In this embodiment, the inner grooves 61 located on the adjacent end faces of the connecting tube 1 and the blast furnace tube 2 can respectively cooperate with the outer convex rings 62 on the two end faces of the rotating ring 3, so as to not only install and position the rotating ring 3, but also realize the rotational cooperation between the rotating ring 3 and other components.

[0030] As a parallel embodiment, the inner grooves 61 can also be arranged on both end surfaces of the rotating ring 3, and the outer convex rings 62 can be arranged on the adjacent end surfaces of the connecting pipe 1 and the blast furnace pipe 2, respectively, which can play the same matching role.

[0031] When the driving assembly 7 drives the rotating ring 3 to rotate, the sliding fit between the outer convex ring 62 and the inner groove 61 can realize effective limiting of the circumferential rotation of the rotating ring 3, thereby preventing the rotating ring 3 from escaping from between the connecting pipe 1 and the blast furnace tube 2, and making the rotating ring 3 stably located between the connecting pipe 1 and the blast furnace tube 2.

[0032] In one possible implementation, see Figures 1 to 4 The driving assembly 7 includes a rotating driving member 71, a gear 72 and a ring gear 73. The rotating driving member 71 is arranged on the connecting pipe 1. The gear 72 is connected to the driving end of the rotating driving member 71. The ring gear 73 is sleeved on the outer periphery of the rotating ring 3 and meshes with the gear 72. The ring gear 73 can drive the rotating ring 3 to rotate under the drive of the gear 72.

[0033] In this embodiment, the driving assembly 7 mainly drives the gear 72 to rotate by the rotating driving member 71, and then utilizes the engagement between the gear 72 and the ring gear 73 to realize the rotational drive of the ring gear 73 (that is, the rotating ring 3), thereby realizing the pushing effect of the fan blades 4 on the hot air and the cleaning effect of the cleaning rod 5 on the air supply plate 21.

[0034] For some examples, see Figures 1 to 4 The outer periphery of the connecting pipe 1 is provided with a fixing hoop 11, and the rotating driving member 71 is connected to the fixing hoop 11. The fixing hoop 11 on the outer periphery of the connecting pipe 1 is mainly used to install the rotating driving member 71. The fixing hoop 11 can adopt a structure in which two semicircular parts are spliced ​​and connected to each other, or a structure with a certain elasticity and capable of opening outwards, so that the fixing hoop 11 can be removed from the connecting pipe 1, which is convenient for the subsequent disassembly and maintenance of the rotating driving member 71.

[0035] In one possible implementation, see Figures 1 to 4 A mounting frame 32 is provided on the inner side of the rotating ring 3 , and the mounting frame 32 includes two support rods 33 arranged in a crisscross pattern. The fan blade 4 includes a plurality of blades 41 distributed on the periphery of the rotating shaft 31 .

[0036] In this embodiment, the mounting frame 32 inside the rotating ring 3 is used to mount the rotating shaft 31, thereby realizing reliable mounting of the fan blade 4. The mounting member is formed by crisscrossing support rods 33, and the rotating shaft 31 is arranged at the intersection of two support rods 33. The fan blade 4 includes a plurality of blades 41 arranged at intervals in the circumferential direction. The rotating blades 41 can guide the airflow from the side of the connecting pipe 1 to the side of the blast furnace pipe 2, thereby ensuring the effective supply of hot gas during the blast furnace ironmaking process.

[0037] The fan blades 4 include a plurality of blades 41, each of which has a certain curvature, and can form a guiding and pushing effect on the airflow. It not only has a pushing and accelerating effect on the hot air when the hot air is supplied normally, but can also still produce a blowing effect when the hot air supply is suddenly stopped, thereby preventing slag from pouring into the air port, effectively protecting the air port from being damaged by slag, increasing the service life of the air port, and reducing production costs.

[0038] In one possible implementation, see Figures 1 to 4 The rotating shaft 31 passes through the air supply plate 21, the fan blade 4 is arranged on one side of the air supply plate 21 close to the connecting pipe 1, and the cleaning rod 5 is arranged on the other side of the air supply plate 21. The cleaning rod 5 is arranged adjacent to the plate surface of the air supply plate 21 and is used to clean the slag on the air supply plate 21.

[0039] In this embodiment, the hot air delivered by the connecting pipe 1 is delivered to the blast furnace tube 2 through the ventilation holes 22 on the air supply plate 21. The fan blades 4 are used to deliver the hot air to the ventilation holes 22 of the air supply plate 21. The cleaning rod 5 can clean the surface of the air supply plate 21 to prevent slag from adhering to the air supply plate 21 and blocking the ventilation holes 22.

[0040] On this basis, see Figures 1 to 4 The outer end of the rotating shaft 31 is also connected to a slag blocking frame 8, which includes a main rod 81 extending along the radial direction of the rotating shaft 31 and auxiliary rods 82 connected to both sides of the main rod 81, and the auxiliary rods 82 are arranged perpendicular to the main rod 81. The slag blocking frame 8 adopts the form of a combination of the main rod 81 and the auxiliary rod 82, which can radiate a larger area on the cross section of the connecting pipe 1, and rotates circumferentially under the driving action of the rotating ring 3, so as to strike the backflowing slag, play a preliminary anti-slag filling effect, effectively prevent the occurrence of tuyere slag filling accidents during the blast furnace ironmaking process, and ensure the normal operation and safe production of the blast furnace.

[0041] In one possible implementation, see Figures 1 to 4 The ventilation holes 22 include a plurality of main air supply holes 23 spaced apart along the circumference of the air supply plate 21. The main air supply holes 23 extend along the radial direction of the air supply plate 21, and the outer end width of the main air supply holes 23 gradually increases.

[0042] On this basis, the air supply plate 21 is provided with an auxiliary air supply hole 24 located between two adjacent main air supply holes 23. The auxiliary air supply hole 24 is arranged close to the outer end of the main air supply hole 23. The auxiliary air supply hole 24 extends radially along the air supply plate 21, and the outer end width of the auxiliary air supply hole 24 gradually increases.

[0043] In this embodiment, the ventilation holes 22 are in the form of a combination of the main air supply holes 23 and the auxiliary air supply holes 24, which can maximize the passing area of ​​the airflow on the air supply plate 21 and ensure the effective supply of hot air. The above-mentioned position layout method not only realizes the effective delivery of airflow, but also ensures the structural strength of the air supply plate 21.

[0044] For some examples, see Figures 1 to 4 A support frame 25 is provided in the blast furnace tube 2 adjacent to the air supply plate 21. The support frame 25 is located at one end of the air supply plate 21 close to the rotating ring 3. The support frame 25 is provided with a through hole 26 for the rotating shaft 31 to pass through. The rotating shaft 31 is rotatably connected in the through hole 26. The setting of the support frame 25 can support and limit the rotating shaft 31, prevent the rotating shaft 31 from being deformed under the gravity of the cleaning rod 5 and the fan blade 4, and ensure the effective driving of the above components.

[0045] In the above-mentioned blast furnace ironmaking tuyere slag filling prevention device, the rotating ring 3 can rotate circumferentially relative to the connecting pipe 1 and the blast furnace tube 2, so that the fan blades 4 connected to the rotating ring 3 can be used to push the hot air to the side of the blast furnace tube 2, so that the hot air can enter the blast furnace in time, thereby improving the ironmaking efficiency of the blast furnace. The cleaning rod 5 can clean the surface of the air supply plate 21 under the drive of the rotating ring 3 to ensure the effective transportation of the air flow. Even when the hot air stops being supplied, the fan blades 4 can still be used to blow air into the blast furnace to avoid slag filling in the tuyere and ensure the safe operation of the blast furnace.

[0046] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A blast furnace ironmaking tuyere slag prevention device, characterized in that: The invention comprises a connecting pipe (1), a blast furnace pipe (2), a rotating ring (3), a fan blade (4) and a cleaning rod (5); the rotating ring (3) is arranged between the connecting pipe (1) and the blast furnace pipe (2) and is respectively rotatably matched with the connecting pipe (1) and the blast furnace pipe (2); a rotating shaft (31) is coaxially rotatably connected inside the rotating ring (3); a driving component (7) for driving the rotating ring (3) to rotate circumferentially is provided on the connecting pipe (1) or the blast furnace pipe (2); the fan blade (4) is connected to the rotating shaft (31) and can rotate with the rotating ring (3) to supply air into the blast furnace pipe (2); an air supply plate (21) is provided inside the blast furnace pipe (2); the air supply plate (21) is provided with a ventilation hole (22) for hot air to pass through; the cleaning rod (5) is connected to the rotating shaft (31) and can rotate with the rotating ring (3) to clean slag on the surface of the air supply plate (21).

2. The blast furnace ironmaking tuyere slag filling prevention device according to claim 1, characterized in that: The connecting tube (1) and the blast furnace tube (2) are respectively provided with inner grooves (61) on their adjacent end surfaces, and the two end surfaces of the rotating ring (3) are respectively provided with outer convex rings (62) which are slidably matched with the inner grooves (61).

3. The blast furnace ironmaking tuyere slag filling prevention device according to claim 1, characterized in that: The driving assembly (7) comprises a rotating driving member (71), a gear (72) and a ring gear (73); the rotating driving member (71) is arranged on the connecting pipe (1); the gear (72) is connected to the driving end of the rotating driving member (71); the ring gear (73) is sleeved on the outer periphery of the rotating ring (3) and meshes with the gear (72); the ring gear (73) can drive the rotating ring (3) to rotate under the drive of the gear (72).

4. The blast furnace ironmaking tuyere slag filling prevention device according to claim 3, characterized in that: A fixing hoop (11) is sleeved on the outer periphery of the connecting pipe (1), and the rotating driving member (71) is connected to the fixing hoop (11).

5. The blast furnace ironmaking tuyere slag filling prevention device according to claim 1, characterized in that: A mounting frame (32) is provided on the inner side of the rotating ring (3), and the mounting frame (32) includes two support rods (33) arranged in a crisscross pattern. The fan blade (4) includes a plurality of blades (41) distributed on the periphery of the rotating shaft (31).

6. The blast furnace ironmaking tuyere slag filling prevention device according to claim 1, characterized in that: The rotating shaft (31) is arranged to pass through the air supply plate (21), the fan blade (4) is arranged on one side of the air supply plate (21) close to the connecting pipe (1), and the cleaning rod (5) is arranged on the other side of the air supply plate (21). The cleaning rod (5) is arranged adjacent to the plate surface of the air supply plate (21) and is used to clean slag on the air supply plate (21).

7. The blast furnace ironmaking tuyere slag filling prevention device according to claim 6, characterized in that: The outer end of the rotating shaft (31) is also connected to a slag blocking frame (8), and the slag blocking frame (8) comprises a main rod (81) extending in the radial direction of the rotating shaft (31) and auxiliary rods (82) connected to both sides of the main rod (81), and the auxiliary rods (82) are arranged perpendicular to the main rod (81).

8. The device for preventing slag filling at the tuyere of blast furnace ironmaking according to any one of claims 1 to 7, characterized in that: The ventilation holes (22) include a plurality of main air supply holes (23) arranged at intervals along the circumference of the air supply plate (21); the main air supply holes (23) extend radially along the air supply plate (21), and the outer end width of the main air supply holes (23) gradually increases.

9. The blast furnace ironmaking tuyere slag filling prevention device according to claim 8, characterized in that: The air supply plate (21) is provided with an auxiliary air supply hole (24) located between two adjacent main air supply holes (23); the auxiliary air supply hole (24) is arranged close to the outer end of the main air supply hole (23); the auxiliary air supply hole (24) extends in the radial direction of the air supply plate (21), and the outer end width of the auxiliary air supply hole (24) gradually increases.

10. The blast furnace ironmaking tuyere slag filling prevention device according to claim 9, characterized in that: A support frame (25) is provided in the blast furnace tube (2) and is arranged adjacent to the air supply plate (21). The support frame (25) is located at one end of the air supply plate (21) close to the rotating ring (3). A through hole (26) is provided on the support frame (25) for the rotating shaft (31) to pass through. The rotating shaft (31) is rotatably connected to the through hole (26).

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