Blast furnace slag shell cracking device

Abstract

The utility model provides a blast furnace slag crust cracking device which comprises an outer pipe, an inner pipe and an inner pipe, air injection holes are formed in the side wall of the air injection pipe, one end of the air injection pipe is blocked, the other end of the air injection pipe is in threaded connection with one end of the outer pipe, and a blocking piece is arranged between the air injection pipe and the outer pipe; the tail plate is in threaded connection with one end, far away from the gas ejector pipe, of the outer pipe; and the fixing assembly is used for fixing the outer pipe on the inner side of the iron notch hole channel. The device has the advantages that the relative position of the fixing assembly and the outer pipe can be adjusted, the device is suitable for operation of iron notch hole channels with different depths, the fixing assembly plays a role in rapidly fixing the device, and the working efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the field of metallurgical technology, and in particular relates to a device for cracking blast furnace slag shell. Background Technology

[0002] Before blast furnace shutdown, coke is usually filled into the furnace waist and belly according to plan to ensure sufficient heat in the hearth when the furnace is started. Before shutdown, the slag and iron in the hearth are removed as much as possible. After a long shutdown time, especially in large blast furnaces, a thick slag shell forms between the tuyeres and the taphole, which hinders the slag and iron from penetrating into the hearth when the furnace is started. Before starting the furnace, a method of first breaking open the channel and then starting the furnace with an oxygen lance is also adopted.

[0003] The current methods for breaking open the channel are as follows: First, using explosives to break open the channel. Explosives can easily damage the taphole, causing a risk of furnace opening and a large amount of slag and iron will be sprayed from the furnace door; Second, using a gas fracturing tube to break open the channel. The gas fracturing tube is inserted into the taphole and then sealed with soil, resulting in low work efficiency. Utility Model Content

[0004] In view of this, the present invention aims to provide a blast furnace slag shell cracking device in order to solve at least one of the above-mentioned technical problems.

[0005] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0006] A blast furnace slag shell cracking device, comprising:

[0007] The outer tube has starting components on the inner sides of both ends;

[0008] A jet pipe with jet holes on its sidewall, one end of the jet pipe being sealed and the other end being threaded to one end of an outer pipe, and a baffle plate being provided between the jet pipe and the outer pipe;

[0009] Tail plate, which is threadedly connected to the end of the outer tube away from the jet pipe;

[0010] A fixing component for fixing the outer tube to the inside of the iron taphole.

[0011] Furthermore, the outer diameter of the jet pipe matches the outer diameter of the outer pipe, and a first connecting threaded pipe is fixedly provided at one end of the jet pipe near the outer pipe. Threaded grooves are opened on the inner sides of both ends of the outer pipe, and the first connecting threaded pipe is threadedly connected to the inner side of the threaded groove at one end of the outer pipe.

[0012] The outer edge of the jet pipe near the outer pipe end has a chamfered structure;

[0013] A baffle is provided between the first connecting threaded pipe and the bottom end of the threaded groove. A cross groove is opened on the baffle, and a sealing gasket is provided between the baffle and the bottom end of the threaded groove.

[0014] Furthermore, the tail plate is provided with a second connecting threaded tube, which is threadedly connected to the inner side of the threaded groove at the end of the outer tube away from the jet pipe.

[0015] A sealing gasket ring is provided between the second connecting threaded pipe and the bottom end of the threaded groove;

[0016] The tail plate is provided with a connecting pipe that communicates with the inside of the outer pipe, and a valve is provided on the connecting pipe.

[0017] Furthermore, the tail plate and baffle respectively seal the openings at both ends of the outer tube to form a storage cavity, which is filled with liquid inert gas.

[0018] Furthermore, the fixing component includes:

[0019] Mounting ring, the inner diameter of which matches the outer diameter of the outer tube;

[0020] The guide structure includes two mounting plates fixedly connected to the mounting ring. The mounting plates are arranged perpendicular to the mounting ring. The guide structure is located on the end face of the mounting ring near the air outlet. There are multiple guide structures, which are evenly arranged circumferentially along the mounting ring.

[0021] Pressure block one, wherein the pressure block one is installed between two mounting plates;

[0022] Pressure block two, which is installed between two mounting plates;

[0023] A driving block is used to drive the pressure block to move in the direction of the outer tube, and the driving block is used to drive the pressure block to move in the direction away from the outer tube.

[0024] Furthermore, adjacent guide structures are connected by arc-shaped plates.

[0025] Furthermore, the driving block is installed between the pressure block one and the pressure block two. The end face of the pressure block one adjacent to the driving block is a first inclined surface, and the end face of the driving block adjacent to the driving block is a second inclined surface. The second inclined surface matches the first inclined surface.

[0026] The upper width of the second pressure block is smaller than the lower width. The end face of the second pressure block adjacent to the driving block, from top to bottom, consists of a loosening plane, a third inclined plane, and a clamping plane. The end face of the driving block adjacent to the second pressure block, from top to bottom, consists of a positioning plane and a fourth inclined plane. The fourth inclined plane matches the third inclined plane.

[0027] The drive block is equipped with a driver, which is used to control the drive block to move up and down.

[0028] Furthermore, the driver is a bolt, the mounting ring has a rotating hole, the driving block has a threaded hole, and the bolt passes through the rotating hole and is threadedly connected to the driving block.

[0029] The mounting plate is fixed with a horizontal plate corresponding to the bolt. The horizontal plate has a through hole corresponding to the bolt. The bolt passes through the through hole, and an annular boss is provided on the outer side of the part of the bolt that passes through the through hole.

[0030] Furthermore, the pressure block has a strip-shaped hole arranged along the moving direction of the pressure block, and a guide post is fixed on the mounting plate, the guide post being located inside the strip-shaped hole.

[0031] Furthermore, a first rubber pad is fixed on the end face of the pressure block away from the outer tube, and the end face of the first rubber pad away from the outer tube is an arc-shaped surface.

[0032] A second rubber pad is fixed on the end face of the second pressure block near the outer tube, and a V-shaped groove is opened on the end face of the second rubber pad near the outer tube.

[0033] Compared with the prior art, the blast furnace slag shell cracking device of this utility model has the following advantages:

[0034] Beneficial effects:

[0035] (1) The blast furnace slag shell cracking device described in this utility model has an adjustable relative position between the fixing component and the outer tube, and is suitable for operation in tapholes of different depths. The fixing component plays the role of a quick fixing device, which improves work efficiency.

[0036] (2) The blast furnace slag shell cracking device described in this utility model has a second rubber pad that increases the friction between the second pressure block and the outer tube and has a certain amount of deformation, which makes it easy for the second pressure block to clamp the outer tube. The V-groove is suitable for outer tubes of different diameters. Attached Figure Description

[0037] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0038] Figure 1 This is a three-dimensional structural diagram of the device described in an embodiment of the present utility model;

[0039] Figure 2 As described in the embodiments of this utility model Figure 1 Schematic diagram of the structure at point D;

[0040] Figure 3 This is a schematic cross-sectional view of the device described in an embodiment of the present invention;

[0041] Figure 4 As described in the embodiments of this utility model Figure 3 Schematic diagram of the structure at point A in the middle;

[0042] Figure 5 As described in the embodiments of this utility model Figure 3 Schematic diagram of the structure at point B;

[0043] Figure 6 As described in the embodiments of this utility model Figure 3 Schematic diagram of the structure at point C;

[0044] Figure 7 This is a schematic diagram of the two-dimensional structure of the pressing block according to an embodiment of the present utility model;

[0045] Figure 8 This is a schematic diagram of the three-dimensional structure of the pressing block according to an embodiment of the present utility model;

[0046] Figure 9 This is a schematic diagram of the three-dimensional structure of the baffle as described in an embodiment of the present utility model;

[0047] Figure 10 This is a three-dimensional structural diagram of the mounting ring described in an embodiment of the present utility model;

[0048] Figure 11 This is a three-dimensional structural diagram of the driving block according to an embodiment of the present utility model.

[0049] Explanation of reference numerals in the attached figures:

[0050] 1. Outer tube; 2. Jet pipe; 3. Bolt; 4. Tail plate; 5. Mounting ring; 6. Sealing gasket ring; 7. Baffle; 8. Pressure block one; 9. Pressure block two; 10. Drive block; 201. Jet hole; 202. First connecting threaded pipe; 401. Connecting pipe; 402. Second connecting threaded pipe; 501. Mounting plate; 502. Guide post; 503. Horizontal plate; 504. Rotating hole; 505. Arc plate; 701. Cross groove; 801. First inclined surface; 802. Strip hole; 803. First rubber pad; 901. Loosening plane; 902. Third inclined surface; 903. Clamping plane; 904. Second rubber pad; 905. V-groove; 1001. Second inclined surface; 1002. Positioning plane; 1003. Fourth inclined surface; 1004. Threaded hole. Detailed Implementation

[0051] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0052] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0053] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0054] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0055] like Figures 1 to 11 As shown, a blast furnace slag shell cracking device includes: an outer pipe 1, with starting components installed on the inner sides of both ends of the outer pipe 1; a jet pipe 2, with jet holes 201 on the side wall of the jet pipe 2, the jet holes 201 penetrating the jet pipe 2, the axis of the jet holes 201 being perpendicular to the axis of the jet pipe 2, one end of the jet pipe 2 being sealed, and the other end being threadedly connected to one end of the outer pipe 1, with a baffle 7 provided between the jet pipe 2 and the outer pipe 1; a tail plate 4, which is threadedly connected to the end of the outer pipe 1 away from the jet pipe 2; and a fixing component, which is movably connected to the outer pipe 1 and is used to fix the outer pipe 1 inside the taphole channel. The starting component uses, but is not limited to, existing electric igniters: ignition is triggered by electrical energy, commonly electric detonators, which contain heating wires inside, generating high temperatures when energized, causing the liquid gas to vaporize.

[0056] The outer diameter of the jet pipe 2 matches the outer diameter of the outer pipe 1. A first connecting threaded pipe 202 is fixedly installed at one end of the jet pipe 2 near the outer pipe 1. Threaded grooves are opened on the inner sides of both ends of the outer pipe 1. The first connecting threaded pipe 202 is threadedly connected to the inner side of the threaded groove at one end of the outer pipe 1. The outer edge of the jet pipe 2 near the outer pipe 1 has a chamfered structure. A baffle 7 is provided between the first connecting threaded pipe 202 and the bottom end of the threaded groove. A cross groove 701 is opened on the baffle 7 to facilitate the formation of an opening after gas expansion. A sealing gasket 6 is provided between the baffle 7 and the bottom end of the threaded groove, which improves the sealing performance between the baffle 7 and the outer pipe 1. The first connecting bolt 3 presses the baffle 7 against the bottom end of the threaded groove, making replacement convenient and improving work efficiency.

[0057] The tail plate 4 is provided with a second connecting threaded pipe 402, which is threaded to the inner side of the threaded groove at the end of the outer pipe 1 away from the jet pipe 2; a sealing gasket ring 6 is provided between the second connecting threaded pipe 402 and the bottom of the threaded groove, which improves the sealing performance between the second connecting threaded pipe 402 and the outer pipe 1; the tail plate 4 is provided with a connecting pipe 401 that communicates with the inner side of the outer pipe 1, and a valve is provided on the connecting pipe 401.

[0058] Tail plate 4 and baffle 7 respectively seal the openings at both ends of outer tube 1 to form a storage chamber. The storage chamber contains liquid inert gas, which is liquid carbon dioxide.

[0059] The fixing components include: a mounting ring 5, the inner diameter of which matches the outer diameter of the outer tube 1; a guide structure, comprising two mounting plates 501 fixedly connected to the mounting ring 5, the mounting plates 501 being perpendicular to the mounting ring 5, the guide structures being located on the end face of the mounting ring 5 near the jet nozzle, and three guide structures in total, each containing a pressure block 8 and a pressure block 9, the three guide structures being evenly arranged circumferentially along the mounting ring 5; pressure block 8, installed between the two mounting plates 501; pressure block 9, installed between the two mounting plates 501; and a drive block 10, used to drive pressure block 9 to move towards the outer tube 1 and to drive pressure block 8 to move away from the outer tube 1. Adjacent guide structures are connected by arc-shaped plates 505.

[0060] The drive block 10 is installed between the pressure block 8 and the pressure block 9. The end face of the pressure block 8 adjacent to the drive block 10 is the first inclined surface 801, and the end face of the drive block 10 adjacent to the drive block 10 is the second inclined surface 1001. The second inclined surface 1001 matches the first inclined surface 801. The upper width of the pressure block 9 is smaller than the lower width. The end face of the pressure block 9 adjacent to the drive block 10, from top to bottom, consists of a loosening plane 901, a third inclined surface 902, and a clamping plane 903. The end face of the drive block 10 adjacent to the pressure block 9, from top to bottom, consists of a positioning plane 1002 and a fourth inclined surface 1003. The fourth inclined surface 1003 matches the third inclined surface 902. The drive block 10 is equipped with a corresponding driver, which is used to control the up and down movement of the drive block 10.

[0061] In some embodiments, the driver is a bolt 3, the mounting ring 5 has a rotating hole 504, the driving block 10 has a threaded hole 1004, the bolt 3 passes through the rotating hole 504 and is threadedly connected to the driving block 10; a horizontal plate 503 corresponding to the bolt 3 is fixed on the mounting plate 501, the horizontal plate 503 has a through hole corresponding to the bolt 3, the bolt 3 passes through the through hole, and an annular boss is provided on the outer side of the part of the bolt 3 that passes through the through hole. The annular boss limits the bolt 3 to prevent the bolt 3 from dislodging from the through hole. The horizontal plate 503 increases the stability of the bolt 3 during rotation and prevents the bolt 3 from deforming. The horizontal plate 503 limits the upper end face of the pressure block 8 and the pressure block 9.

[0062] In other embodiments, the actuator is a hydraulic cylinder, the hydraulic cylinder housing is fixedly connected to the mounting ring 5, and the hydraulic cylinder output shaft is connected to the drive block 10.

[0063] The pressure block 8 has a strip hole 802 set along the moving direction of the pressure block 8. A guide post 502 is fixed on the mounting plate 501. The guide post 502 is located inside the strip hole 802. The guide post 502 plays a guiding and limiting role for the pressure block 8.

[0064] A first rubber pad 803 is fixedly provided on the end face of the pressure block 8 away from the outer tube 1. The end face of the first rubber pad 803 away from the outer tube 1 is arc-shaped. The first rubber pad 803 increases the friction between the pressure block 8 and the inner wall of the iron tap hole, making it easier for the pressure block 8 to press against the inner wall of the iron tap hole. A second rubber pad 904 is fixedly provided on the end face of the pressure block 9 near the outer tube 1. The second rubber pad 904 has a V-shaped groove 905 on its end face near the outer tube 1. The second rubber pad 904 increases the friction between the pressure block 9 and the outer tube 1 and has a certain amount of deformation, making it easier for the pressure block 9 to clamp the outer tube 1. The V-shaped groove 905 is suitable for outer tubes 1 of different diameters.

[0065] Work process:

[0066] Liquid inert gas is filled into the storage cavity of the inner tube through the connecting pipe 401. Then, the jet pipe 2 end of the outer tube 1 is inserted into the iron hole channel to a specified depth. The orientation of the jet hole 201 is adjusted. Then, the installation ring 5 is moved to seal the opening of the iron hole channel and the bolt 3 is rotated. The bolt 3 drives the drive block 10 to move downward. In the initial state, the positioning plane 1002 is in contact with the loosening plane 901. Under the action of the third inclined surface 902 of the pressure block 2 9 and the fourth inclined surface 1003 of the drive block 10, the pressure block 2 9 moves towards the outer tube 1 until the positioning plane 1002 of the drive block 10 is in contact with the clamping plane 903. Then the pressure block 2 9 stops moving. At this time, the second rubber pad 904 is deformed, and multiple pressure blocks... Block 29 clamps the outer wall of the outer tube 1. During this process, under the combined action of the first inclined surface 801 of the pressure block 18 and the second inclined surface of the drive block 10, the pressure block 18 continues to move away from the outer tube 1 until the first rubber pad 803 presses against the inner wall of the taphole. The starting component activates the liquid inert gas, which is heated and instantly vaporizes, expanding in volume by about 600 times. The pressure rises sharply, and the high-pressure gas breaks through the constant pressure shear plate and is released directionally from the release port. The powerful thrust generated instantaneously impacts and cracks the slag shell above the taphole, achieving effective communication between the taphole and the tuyeres. This assists in heating the hearth with the oxygen lance, improving the permeability of the taphole hearth, and allowing the slag and iron in the furnace to be discharged in time, achieving the goal of producing a good first batch of iron after the re-airing.

[0067] The outer diameter of the mounting ring 5 is larger than the diameter of the iron hole, which serves to seal the iron hole. The relative position of the fixing component and the outer tube 1 is adjustable, making it suitable for iron hole operations of different depths. The fixing component also serves as a quick fixing device, improving work efficiency.

[0068] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

[0069] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A blast furnace slag shell cracking apparatus characterized by, The utility model relates to a liquid inert gas injection device for tundish, which comprises: an outer tube (1) with a starting assembly on the inner side of both ends; a jet pipe (2) with a jet hole (201) on the side wall, one end of which is blocked and the other end is threadedly connected with one end of the outer tube (1), and a baffle (7) is arranged between the jet pipe (2) and the outer tube (1); a tail plate (4) which is threadedly connected with the end of the outer tube (1) away from the jet pipe (2); a fixing assembly for fixing the outer tube (1) on the inner side of the hole channel of the tundish, which is movably connected with the outer tube (1).

2. A device for inducing cracking in a blast furnace slag shell according to claim 1, characterized in that: The outer diameter of the jet pipe (2) matches the outer diameter of the outer tube (1), a first connecting threaded pipe (202) is fixedly arranged on the end of the jet pipe (2) close to the outer tube (1), and a threaded groove is formed on the inner side of both ends of the outer tube (1), the first connecting threaded pipe (202) is threadedly connected with the inner side of the threaded groove on one end of the outer tube (1); the outer side edge of the end of the jet pipe (2) close to the outer tube (1) is chamfered; a baffle (7) is arranged between the first connecting threaded pipe (202) and the bottom end of the threaded groove, a cross recess (701) is formed on the baffle (7), and a sealing gasket ring (6) is arranged between the baffle (7) and the bottom end of the threaded groove.

3. A device for inducing cracking in a blast furnace slag shell according to claim 2, characterized in that: A second connecting threaded pipe (402) is arranged on the tail plate (4) and threadedly connected with the inner side of the threaded groove on the end of the outer tube (1) away from the jet pipe (2); a sealing gasket ring (6) is arranged between the second connecting threaded pipe (402) and the bottom end of the threaded groove; a connecting pipe (401) is arranged on the tail plate (4) and communicates with the inner side of the outer tube (1), and a valve is arranged on the connecting pipe (401).

4. The apparatus for inducing cracking in a blast furnace slag shell according to claim 1, wherein: The openings of both ends of the outer tube (1) are closed by the tail plate (4) and the baffle (7) to form a storage cavity, and liquid inert gas is arranged in the storage cavity.

5. The apparatus for inducing cracking in a blast furnace slag shell according to claim 1, wherein The fixing assembly comprises: a mounting ring (5) with an inner diameter matching the outer diameter of the outer tube (1); a guide structure comprising two mounting plates (501) fixedly connected with the mounting ring (5), the mounting plates (501) are arranged perpendicularly to the mounting ring (5), the guide structure is arranged on the end face of the mounting ring (5) close to the jet port, the number of the guide structure is multiple, and the multiple guide structures are arranged uniformly in the circumferential direction of the mounting ring (5); a first pressing block (8) mounted between the two mounting plates (501); a second pressing block (9) mounted between the two mounting plates (501); a driving block (10) for driving the second pressing block (9) to move towards the outer tube (1) and for driving the first pressing block (8) to move away from the outer tube (1).

6. A device for inducing cracking in a blast furnace slag shell according to claim 5, characterized in that: Adjacent guide structures are connected by arc-shaped plates (505).

7. A device for inducing spalling of a blast furnace slag shell according to claim 5, characterized in that: The driving block (10) is installed between the pressing block one (8) and the pressing block two (9), the end face of the pressing block one (8) adjacent to the driving block (10) is a first inclined surface (801), the end face of the driving block (10) adjacent to the driving block (10) is a second inclined surface (1001), and the second inclined surface (1001) matches the first inclined surface (801); The upper end of the pressing block two (9) is smaller than the lower end in width, the end face of the pressing block two (9) adjacent to the driving block (10) is from top to bottom a loose plane (901), a third inclined surface (902) and a clamping plane (903), and the end face of the driving block (10) adjacent to the pressing block two (9) is from top to bottom a positioning plane (1002) and a fourth inclined surface (1003), and the fourth inclined surface (1003) matches the third inclined surface (902); The driving block (10) is provided with a driver corresponding to the driving block (10) for controlling the driving block (10) to move up and down.

8. A device for inducing cracking in a blast furnace slag shell according to claim 7, characterized in that: The driver is a bolt (3), the mounting ring (5) is provided with a rotating hole (504), the driving block (10) is provided with a threaded hole (1004), and the bolt (3) is threadedly connected with the driving block (10) penetrating through the rotating hole (504); The mounting plate (501) is fixedly provided with a cross plate (503) corresponding to the bolt (3), the cross plate (503) is provided with a through hole corresponding to the bolt (3), the bolt (3) penetrates through the through hole, and the outer side of the part of the bolt (3) penetrating through the through hole is provided with an annular boss.

9. A device for inducing cracking in a blast furnace slag shell according to claim 8, characterized in that: The pressing block one (8) is provided with a strip-shaped hole (802) arranged along the moving direction of the pressing block one (8), and the mounting plate (501) is fixedly provided with a guide column (502) located on the inner side of the strip-shaped hole (802).

10. A device for inducing spalling of a blast furnace slag shell according to claim 5, characterized in that: The pressing block one (8) is fixedly provided with a first rubber pad (803) on the end face away from the outer tube (1), and the end face of the first rubber pad (803) away from the outer tube (1) is an arc surface; The pressing block two (9) is fixedly provided with a second rubber pad (904) on the end face adjacent to the outer tube (1), and the end face of the second rubber pad (904) adjacent to the outer tube (1) is provided with a V-shaped groove (905).

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