CN112775424A

CN112775424A - Tundish nozzle baking system

Info

Publication number: CN112775424A
Application number: CN202011444830.5A
Authority: CN
Inventors: 郎俊刚; 高海; 房志琦; 胡铁军; 孙力; 范立鑫
Original assignee: HBIS Co Ltd Chengde Branch
Current assignee: HBIS Co Ltd Chengde Branch
Priority date: 2020-12-11
Filing date: 2020-12-11
Publication date: 2021-05-11
Anticipated expiration: 2040-12-11
Also published as: CN112775424B

Abstract

The invention provides a tundish nozzle baking system, which belongs to the technical field of metallurgical continuous casting and comprises a baking cylinder, a rotating ring, a plurality of first fan blades, a nozzle, a gas pipe and a striking device, wherein the first fan blades are arranged on the baking cylinder; the baking cylinder is provided with a rotary groove; the rotating ring is rotatably connected with the rotating groove, and an accommodating cavity is formed between the rotating ring and the rotating groove; each first fan blade is arranged in the containing cavity; the nozzle is arranged on the rotating ring and is communicated with the accommodating cavity; one end of the gas pipe is communicated with the accommodating cavity, and the other end of the gas pipe is communicated with a gas source; when toasting the middle package mouth of a river, insert the middle package mouth of a river and toast a section of thick bamboo in, drive the nozzle through the rotating ring and rotate, can make nozzle spun flame rotate around the middle package mouth of a river, consequently can be more even to the toasting of middle package mouth of a river, reduce to appear because partial molten iron solidifies in middle package mouth of a river department and causes the condition of influence to production.

Description

Tundish nozzle baking system

Technical Field

The invention belongs to the technical field of metallurgical continuous casting, and particularly relates to a tundish nozzle baking system.

Background

In the continuous casting process, molten steel in a steel ladle is poured into a tundish, and then is shunted by the tundish to enter each crystallizer; in order to reduce molten steel oxidation, splashing and heat loss caused by contact of molten steel with air in the process of entering a crystallizer from a tundish, the tundish usually adopts an immersion nozzle; because the water gap of the tundish is immersed in high-temperature molten steel of the crystallizer for a long time, the water gap needs to be baked before the tundish is used; in the prior art, a tundish nozzle is placed in a baking cylinder, and natural gas is used for baking the tundish nozzle, but a baking nozzle in the prior art is fixed on the baking cylinder, so that the tundish nozzle is not uniformly baked in the baking process, and partial molten iron is easily solidified at the tundish nozzle when the tundish nozzle is used, thereby influencing production.

Disclosure of Invention

The invention aims to provide a tundish nozzle baking system, which aims to solve the technical problem that production is influenced due to uneven baking of a tundish nozzle in the prior art.

In order to achieve the purpose, the invention adopts the technical scheme that: the tundish nozzle baking system comprises a baking cylinder, a rotating ring, a plurality of first fan blades, a nozzle, a gas pipe and a striking device; the baking cylinder is provided with a rotary groove; the rotating ring is rotatably connected with the rotating groove, and an accommodating cavity is formed between the rotating ring and the rotating groove and used for accommodating fuel gas; a sealing structure is arranged between the rotating ring and the rotating groove; each first fan blade is arranged in the containing cavity and connected with the rotating ring; the nozzle is arranged on the rotating ring and is communicated with the accommodating cavity; one end of the gas pipe is communicated with the accommodating cavity, and the other end of the gas pipe is communicated with a gas source and is used for providing gas into the accommodating cavity and driving the first fan blade to rotate so as to enable the nozzle to circumferentially bake the tundish nozzle; the ignition device is arranged on the baking cylinder and used for igniting the nozzle so as to enable the nozzle to bake the water gap of the tundish.

As another embodiment of the present application, the heat insulation layers are disposed on the baking cylinder and the rotating ring, and the heat insulation layers are used for reducing heat transferred to the accommodating cavity and the outside of the baking cylinder.

As another embodiment of this application, seal structure is sealed the pad, be equipped with cooling channel in the lateral wall of a section of thick bamboo of baking, cooling channel is used for letting in the coolant liquid, in order to seal up and hold the chamber and cool off.

In another embodiment of the present invention, the nozzle is provided with an air diffuser for scattering and then spraying the gas sprayed from the nozzle to enlarge a combustion area of the gas.

As another embodiment of the present application, the gas dispersing device includes a fixed frame and a rotating frame, the fixed frame is connected to the nozzle, and the rotating frame is rotatably connected to the fixed frame and located at the nozzle; the rotating frame is provided with a second fan blade, and the second fan blade is used for rotating under the driving of gas to scatter the gas and enable the gas to be sprayed out from the second fan blade.

As another embodiment of the present application, a rotating groove is formed on the rotating frame, a limiting portion is formed on the fixing frame, and the limiting portion is located in the rotating groove and connected to the fixing frame; the rotating frame is rotatably connected with the limiting part through a rotating groove so as to limit the position of the rotating frame.

As another embodiment of the application, a cover body is arranged on the baking cylinder, and a through hole for inserting a water gap of a tundish is formed in the cover body; the baking barrel is provided with an air inlet pipe and an exhaust pipe, and the air inlet pipe and the exhaust pipe are communicated with the baking barrel.

As another embodiment of the present application, a sealing portion is disposed on the cover body, and the sealing portion is slidably connected to the cover body and used for sealing the through hole when the cover body does not work.

As another embodiment of the present application, an elastic member is disposed on the cover, and two ends of the elastic member are respectively connected to the sealing portion and the cover.

As another embodiment of the application, a valve is arranged on the gas pipe, and a gear is coaxially arranged on the valve; the closed part is provided with a rack which is meshed with the gear; the cover body is provided with a guide portion, and the guide portion is provided with a limiting hole for sliding the rack.

The tundish nozzle baking system provided by the invention has the beneficial effects that: compared with the prior art, when the tundish nozzle is baked, the tundish nozzle is inserted into the baking cylinder, the rotating ring drives the nozzle to rotate, and flame sprayed by the nozzle can rotate around the tundish nozzle, so that the tundish nozzle can be baked more uniformly, and the influence on production caused by partial molten iron solidified at the tundish nozzle is reduced; the accommodating cavity between the rotating ring and the rotating groove can accommodate fuel gas, and the fuel gas in the fuel gas pipe can drive the first fan blade to rotate after entering the accommodating cavity, so that the rotating ring can be driven to rotate; the nozzle is arranged on the rotating ring, so that the nozzle rotates along with the rotating ring; the nozzle is ignited by the ignition device, so that the gas sprayed out of the nozzle can be combusted and the tundish nozzle can be baked; the sealing structure between the rotating ring and the rotating groove can reduce the gas leaked from the joint of the rotating groove and the rotating ring, and the gas can be sprayed out from the nozzle, so that the tundish nozzle is conveniently baked.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a schematic view of a tundish nozzle;

fig. 2 is a schematic structural diagram of a tundish nozzle baking system according to an embodiment of the present invention;

FIG. 3 is a schematic view of a cover portion of a tundish nozzle baking system according to an embodiment of the present invention;

FIG. 4 is a schematic cross-sectional view of a baking cylinder part of a tundish nozzle baking system according to an embodiment of the present invention;

FIG. 5 is an enlarged view of portion A of FIG. 4;

fig. 6 is a schematic view of a turret portion of a tundish nozzle baking system according to an embodiment of the present invention.

In the figure: 1. a baking cylinder; 11. a rotating tank; 2. a rotating ring; 3. a first fan blade; 4. a nozzle; 5. a gas pipe; 6. a tundish nozzle; 7. a gas dispersing device; 71. a fixed mount; 72. a rotating frame; 721. a rotating groove; 73. a second fan blade; 74. a limiting part; 8. a cover body; 81. a through hole; 82. a closing part; 821. a bevel; 83. a rack; 84. a guide portion; 85. a spring; 9. a gear.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1 to 6, a tundish nozzle baking system according to the present invention will now be described. A tundish nozzle baking system comprises a baking cylinder 1, a rotating ring 2, a plurality of first fan blades 3, a nozzle 4, a gas pipe 5 and a striking device; the baking cylinder 1 is provided with a rotary groove 11; the rotating ring 2 is rotatably connected with the rotating groove 11, and an accommodating cavity is formed between the rotating ring and the rotating groove 11 and used for accommodating fuel gas; a sealing structure is arranged between the rotating ring 2 and the rotating groove 11; each first fan blade 3 is arranged in the containing cavity, and each first fan blade 3 is connected with the rotating ring 2; the nozzle 4 is arranged on the rotating ring 2 and is communicated with the accommodating cavity; one end of the gas pipe 5 is communicated with the accommodating cavity, and the other end of the gas pipe is communicated with a gas source and is used for providing gas for the accommodating cavity and driving the first fan blade 3 to rotate so as to enable the nozzle 4 to rotate in the baking cylinder 1; the ignition device is arranged on the baking cylinder 1 and is used for igniting the nozzle 4 so that the nozzle 4 can bake the tundish nozzle 6.

Compared with the prior art, the tundish nozzle baking system provided by the invention has the advantages that when the tundish nozzle 6 is baked, the tundish nozzle 6 is inserted into the baking cylinder 1, the rotating ring 2 drives the nozzle 4 to rotate, and flame sprayed by the nozzle 4 can rotate around the tundish nozzle 6, so that the tundish nozzle 6 can be baked more uniformly, and the influence on production caused by partial molten iron solidified at the tundish nozzle 6 is reduced; the accommodating cavity between the rotating ring 2 and the rotating groove 11 can accommodate fuel gas, and after the fuel gas in the fuel gas pipe 5 enters the accommodating cavity, the first fan blade 3 can be driven to rotate, so that the rotating ring 2 can be driven to rotate; since the nozzle 4 is provided on the rotary ring 2, the nozzle 4 rotates together with the rotary ring 2; the nozzle 4 is ignited by the ignition device, so that the gas sprayed out from the nozzle 4 is combusted and the tundish nozzle 6 is baked; the sealing structure between the rotating ring 2 and the rotating groove 11 can reduce the gas leaked from the joint of the rotating groove 11 and the rotating ring 2, and can make the gas sprayed out from the nozzle 4, thereby being convenient for baking the tundish nozzle 6.

Referring to fig. 1 to 6, a baking cylinder 1 and a rotating ring 2 are respectively provided with a heat insulating layer for reducing heat transferred to an accommodating cavity and to the outside of the baking cylinder 1; the heat insulation layer on the baking cylinder 1 can reduce the heat transferred from the side wall of the baking cylinder 1 to the outside of the baking cylinder 1, and can play a role in heat insulation; the heat insulating layer on the rotating ring 2 can reduce the heat transferred to the accommodating cavity, so that the sealing structure can seal the rotating ring 2 and the rotating groove 11, and the leakage of fuel gas is reduced.

In this embodiment, a plurality of rotary grooves 11 are arranged in the baking cylinder 1, and the plurality of rotary grooves 11 are arranged along the axial direction of the baking cylinder 1; a rotating ring 2 is arranged in each rotating groove 11, and the embodiment is explained by using one rotating groove 11 and the rotating ring 2 matched with the rotating groove 11; each first fan blade 3 is provided with a radian, and when gas is contacted with the first fan blade 3, the first fan blade 3 can be rotated, so that the rotating ring 2 can be driven to rotate in the rotating groove 11 conveniently; the plurality of first fan blades 3 are arranged along the circumferential direction of the rotating ring 2 at equal radian, and the width of the first fan blades 3 is smaller than that of the rotating ring 2, so that the accommodating cavity can be filled with gas, and the condition that the gas cannot be sprayed out by the nozzle 4 can not occur when the rotating ring 2 rotates; one end of the first fan blade 3, which is far away from the rotating ring 2, is in contact with the bottom of the rotating groove 11, so that the rotating ring 2 can be limited, and the rotating ring 2 cannot be deviated when the rotating ring 2 rotates; the gas pipe 5 is fixed on the baking cylinder 1, the nozzles 4 are fixed on the rotating ring 2, a plurality of nozzles 4 are arranged in the circumferential direction of the rotating ring 2, and three nozzles 4 are taken as an example for explanation in the embodiment; the ignition device includes an ignition needle for discharging the nozzle 4 so that the gas ejected from the nozzle 4 is burned.

As a specific implementation manner of the embodiment of the present invention, please refer to fig. 1 to 6, the sealing structure is a sealing gasket, a cooling channel is disposed in a side wall of the baking cylinder 1, and the cooling channel is used for introducing a cooling liquid to cool the sealing gasket and the accommodating cavity; the sealing gasket is fixed on the rotating ring 2, and the cooling channel is close to the accommodating cavity, so that the heat of the accommodating cavity is taken away conveniently; a water inlet and a water outlet are arranged on the baking cylinder 1, and are communicated with the cooling channel; the cooling liquid enters the cooling channel from the water inlet and flows out from the water outlet; the coolant liquid can absorb the heat of holding the chamber at the cooling pipe flow in-process, can make simultaneously sealed the pad be in suitable temperature, and the sealed pad of being convenient for seals rotating ring 2 and rotary slot 11.

Referring to fig. 1 to 6, as a specific implementation manner of an embodiment of the present invention, an air diffuser 7 is disposed on the nozzle 4, and the air diffuser 7 is used for scattering and spraying out the gas sprayed from the nozzle 4 to enlarge a combustion area of the gas; the area of the gas dispersing device 7 is larger than that of the nozzle 4, the gas dispersing device 7 is arranged on the nozzle 4, the gas sprayed out of the nozzle 4 is dispersed through the gas dispersing device 7 and then sprayed out again, the area of the gas sprayed out can be increased, the combustion area of the gas can be increased during combustion of the gas, and therefore the tundish nozzle 6 can be baked conveniently.

As a specific implementation manner of the embodiment of the present invention, referring to fig. 1 to 6, the air diffuser 7 includes a fixed frame 71 and a rotating frame 72, the fixed frame 71 is connected to the nozzle 4, and the rotating frame 72 is rotatably connected to the fixed frame 71 and located at the nozzle 4; the fixed frame 71 is fixed on the nozzle 4, the rotating frame 72 is fixedly provided with a plurality of second fan blades 73, and the plurality of second fan blades 73 are arranged along the circumferential surface of the rotating frame 72 in an equal radian; the second fan blade 73 is obliquely arranged, so that the airflow and the second fan blade 73 form a certain angle, the rotating frame 72 can be driven by the gas sprayed from the nozzle 4 to rotate, the gas sprayed from the nozzle 4 can be scattered in the rotating process of the second fan blade 73, and the gas is sprayed from the second fan blade 73, so that the gas spraying area can be increased, and the tundish nozzle 6 can be conveniently baked.

As a specific implementation manner of the embodiment of the present invention, please refer to fig. 1 to 6, a rotating slot 721 is disposed on the rotating frame 72, a limiting portion 74 is disposed on the fixing frame 71, the limiting portion 74 is disposed in the rotating slot 721 and connected to the fixing frame 71; the rotating frame 72 is rotatably connected with the limiting part 74 through a rotating groove 721 to limit the position of the rotating frame 72; the limiting part 74 is fixedly connected with the fixed frame 71, and the limiting part 74 is always positioned in the rotating groove 721 in the rotating process of the rotating frame 72, so that the position of the rotating frame 72 is limited conveniently under the condition that the rotation of the rotating frame 72 is not influenced, the rotating frame 72 can scatter the gas sprayed out from the nozzle 4, the gas is distributed on the whole rotating frame 72 and sprayed out, the baking area can be increased, and the tundish nozzle 6 can be baked more uniformly; through the rotation of rotating turret 72, can increase the gas spun area to be convenient for improve the utilization ratio of gas.

As a specific implementation manner of the embodiment of the present invention, please refer to fig. 1 to 6, a cover 8 is disposed on the baking cylinder 1, and a through hole 81 for inserting the tundish nozzle 6 is disposed on the cover 8; an air inlet pipe and an air outlet pipe are arranged on the baking cylinder 1, and both the air inlet pipe and the air outlet pipe are communicated with the baking cylinder 1; after the cover body 8 is covered on the baking cylinder 1, the heat emitted from the baking cylinder 1 can be reduced, and the baking efficiency of the tundish nozzle 6 is improved; the through hole 81 on the cover body 8 is used for inserting the tundish nozzle 6, so that the nozzle 4 can bake the tundish nozzle 6 conveniently; the exhaust pipe and the air inlet pipe are both fixed on the baking cylinder 1, and the air inlet pipe is used for providing oxygen into the baking cylinder 1 so as to facilitate the continuous combustion of fuel gas; the exhaust pipe is used for exhausting redundant gas in the baking cylinder 1, so that the situation that the cover body 8 is jacked to fly due to overhigh air pressure in the baking cylinder 1 is reduced, and potential safety hazards are reduced.

In this embodiment, the blast pipe winding can heat the intake pipe at the outer wall of intake pipe for the air current that enters into in the section of thick bamboo 1 of toasting is the hot gas flow, reduces the thermal scattering and disappearing in the section of thick bamboo 1 of toasting, and is convenient for reduce the waste of the energy to the thermal utilization of combustion gas.

As a specific implementation manner of the embodiment of the present invention, please refer to fig. 1 to 6, a sealing portion 82 is disposed on the cover 8, and the sealing portion 82 is slidably connected to the cover 8 and used for sealing the through hole 81 when not in operation; after the tundish nozzle 6 is baked, the tundish nozzle 6 is drawn out from the baking cylinder 1, so that the baking cylinder 1 is communicated with the outside through the through hole 81 on the cover body 8, and heat in the baking cylinder 1 is lost; the through hole 81 in the lid 8 is closed by the closing portion 82, so that the amount of heat dissipated from the through hole 81 in the lid 8 can be reduced, and the baking cylinder 1 can bake the next tundish nozzle 6.

As a specific implementation manner of the embodiment of the present invention, please refer to fig. 1 to 6, an elastic member is disposed on the cover 8, and two ends of the elastic member are respectively connected to the sealing portion 82 and the cover 8; a valve is arranged on the gas pipe 5, and a gear 9 is coaxially arranged on the valve; the closed part 82 is provided with a rack 83, and the rack 83 is meshed with the gear 9; a guide part 84 is arranged on the cover body 8, and a limiting hole for the sliding of the rack 83 is arranged on the guide part 84; the guiding part 84 is fixedly connected with the cover body 8, the elastic element comprises a spring 85, and two ends of the spring 85 are respectively fixedly connected with the closing part 82 and the guiding part 84; the spring 85 can provide an elastic force to the closing portion 82, and when the tundish nozzle 6 is taken out from the roasting cylinder 1, the closing portion 82 slides under the action of the spring 85 to close the through hole 81 in the lid 8, thereby reducing the amount of heat dissipated from the through hole 81.

In this embodiment, the inclined surface 821 is provided on the closing part 82, and in the downward movement process of the tundish nozzle 6, the closing part 82 is firstly contacted with the inclined surface 821 on the closing part 82, so that the closing part 82 can be driven to slide on the cover body 8, and the tundish nozzle 6 is inserted into the through hole 81 of the cover body 8 (or the closing part 82 can be manually slid), thereby being convenient for baking the tundish nozzle 6; in the process that the tundish nozzle 6 drives the closed part 82 to slide, the rack 83 on the closed part 82 can drive the gear 9 to rotate, and the gear 9 and the rotating shaft of the valve are coaxially arranged, so that the gas pipe 5 can be opened, a gas source enters the accommodating cavity after passing through the gas pipe 5, and the ignition device ignites the nozzle 4, so that the sprayed gas is combusted, and the tundish nozzle 6 can be baked; in the baking process of the tundish nozzle 6, air is introduced into the baking cylinder 1 through the air inlet pipe, and redundant gas is discharged through the exhaust pipe, so that the tundish nozzle 6 in the baking cylinder 1 is conveniently baked.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. A tundish nozzle baking system, comprising:

a baking cylinder (1) provided with a rotary groove (11);

the rotating ring (2) is rotatably connected with the rotating groove (11), and an accommodating cavity is formed between the rotating ring and the rotating groove (11) and is used for accommodating fuel gas; a sealing structure is arranged between the rotating ring (2) and the rotating groove (11);

the fan blades (3) are arranged in the accommodating cavity, and each fan blade (3) is connected with the rotating ring (2);

the nozzle (4) is arranged on the rotating ring (2) and is communicated with the accommodating cavity;

one end of the gas pipe (5) is communicated with the accommodating cavity, and the other end of the gas pipe is communicated with a gas source and is used for providing gas for the accommodating cavity and driving the first fan blade (3) to rotate so as to enable the nozzle (4) to circumferentially bake the tundish nozzle (6); and

and the ignition device is arranged on the baking cylinder (1) and is used for igniting the nozzle (4) so as to enable the nozzle (4) to bake the tundish water gap (6).

2. A tundish nozzle baking system as claimed in claim 1, wherein the baking cylinder (1) and the rotating ring (2) are provided with thermal insulation layers for reducing the heat transferred to the accommodating chamber and to the outside of the baking cylinder (1).

3. A tundish nozzle baking system according to claim 2, wherein the sealing structure is a sealing gasket, and a cooling channel is provided in the side wall of the baking cylinder (1), and the cooling channel is used for introducing cooling liquid to cool the sealing gasket and the accommodating chamber.

4. A tundish nozzle baking system as claimed in claim 1, wherein the nozzle (4) is provided with a gas dispersing device (7), and the gas dispersing device (7) is used for dispersing the gas sprayed from the nozzle (4) and then spraying the gas to enlarge the combustion area of the gas.

5. A tundish nozzle baking system according to claim 4, wherein the air diffuser (7) comprises a fixed frame (71) and a rotating frame (72), the fixed frame (71) is connected with the nozzle (4), and the rotating frame (72) is rotatably connected with the fixed frame (71) and is located at the nozzle (4); the rotating frame (72) is provided with a second fan blade (73), and the second fan blade (73) is used for rotating under the driving of gas to scatter the gas and enable the gas to be sprayed out from the second fan blade (73).

6. The tundish nozzle baking system according to claim 5, wherein the rotating frame (72) is provided with a rotating groove (721), the fixing frame (71) is provided with a limiting part (74), and the limiting part (74) is located in the rotating groove (721) and connected with the fixing frame (71); the rotating frame (72) is rotatably connected with the limiting part (74) through a rotating groove (721) so as to limit the position of the rotating frame (72).

7. A tundish nozzle baking system according to claim 1, wherein a cover (8) is provided on the baking cylinder (1), and a through hole (81) for inserting the tundish nozzle (6) is provided on the cover (8); an air inlet pipe and an exhaust pipe are arranged on the baking cylinder (1), and the air inlet pipe and the exhaust pipe are communicated with the baking cylinder (1).

8. A tundish nozzle baking system according to claim 7, wherein the cover (8) is provided with a closing portion (82), the closing portion (82) being slidably connected to the cover (8) for closing the through hole (81) when not in use.

9. The tundish nozzle baking system according to claim 8, wherein the cover (8) is provided with an elastic member, and two ends of the elastic member are respectively connected with the closing part (82) and the cover (8).

10. A tundish nozzle baking system as claimed in claim 9, wherein a valve is provided on the gas pipe (5), and a gear (9) is coaxially provided on the valve; a rack (83) is arranged on the closing part (82), and the rack (83) is meshed with the gear (9); the cover body (8) is provided with a guide part (84), and the guide part (84) is provided with a limiting hole for the sliding of the rack (83).