CN218638534U

CN218638534U - Casting powder discharging device in continuous casting crystallizer

Info

Publication number: CN218638534U
Application number: CN202223244518.9U
Authority: CN
Inventors: 冯涛; 林志强; 李雪; 周左瑞; 谢临潼; 李彩霞; 李志刚
Original assignee: Wuhai Baogang Wanteng Steel Co ltd
Current assignee: Wuhai Baogang Wanteng Steel Co ltd
Priority date: 2022-12-05
Filing date: 2022-12-05
Publication date: 2023-03-17
Anticipated expiration: 2032-12-05

Abstract

The utility model relates to a steel mill continuous casting operation district crystallizer casting area especially relates to a covering slag eduction gear in continuous casting crystallizer. The device can solve the problem that the influence on the quality of the steel billet caused by the fact that the casting powder cannot be discharged in time on site, and can effectively improve the working efficiency. Comprises a jet-type distributor; the end A of the jet flow type distributor is communicated with a pressure air source, the end C of the jet flow type distributor is used as a protective slag jet orifice, the end B of the jet flow type distributor is communicated with a hollow shaft tube through a metal hose, the hollow shaft tube is used as a wheel shaft of two travelling wheels, and the two travelling wheels are used for travelling on the upper edge of the crystallizer; and a plurality of covering slag nozzles communicated with the inner cavity of the hollow shaft tube are arranged on the hollow shaft tube and between the two travelling wheels.

Description

Casting powder discharging device in continuous casting crystallizer

Technical Field

The utility model relates to a steel mill continuous casting operation district crystallizer casting area especially relates to a covering slag eduction gear in continuous casting crystallizer.

Background

According to the actual casting condition of the on-site crystallizer in a steel plant, the casting powder is added into the crystallizer to play five roles: heat preservation, lubrication, heat conduction, air isolation, prevention of secondary oxidation of molten steel and adsorption of impurities in the molten steel. As the consumption of the mold flux in the crystallizer is 0.4kg/t, new mold flux needs to be continuously added into the crystallizer. The protective slag forms a three-layer structure in the process of using, burning and consuming, wherein the uppermost layer is an original protective slag powder slag layer, the middle sintering layer and the lowermost layer is a liquid slag layer contacting molten steel. And the use model of the covering slag is matched with the steel grade necessarily, if the steel grade is replaced, the quality of a casting blank is seriously influenced without replacing the covering slag, and continuous casting breakout can be caused in serious cases.

If the casting powder is melted, consumed and adsorbed in the crystallizer for a long time, the casting powder can agglomerate in the crystallizer, and the lubricating effect of a liquid slag layer of a casting blank in the crystallizer is seriously influenced by the condition.

The common measures are: and fishing out the casting powder caked on the powder slag layer in the crystallizer by using an iron ladle, and timely supplementing new casting powder after the liquid slag layer is leaked out, so that the liquid level of the crystallizer is greatly fluctuated in the process. The same is true when the model of the casting powder is changed when the steel grade is changed. Therefore, the liquid level of the molten steel in the crystallizer needs to be automatically controlled. Generally, the automatic control of the liquid level of molten steel in a crystallizer in a steel plant is realized by fixing a radioactive source Se137 on one side of the crystallizer to release a signal, and processing the other side of the crystallizer by a receiver detection signal through a computer program. However, the shielding slag discharged from the iron ladle in the crystallizer interferes with the radioactive source signal, so that the automatic control of the liquid level of the crystallizer is influenced, the light iron ladle can scar the surface of a casting blank, and in the serious case, the continuous casting can cause steel leakage accidents.

How to discharge the covering slag in the continuous casting crystallizer quickly in the production of a steel mill without causing production accidents or influencing the fluctuation of the liquid level of molten steel in the crystallizer, thereby effectively improving the quality of casting blanks and solving the technical problem.

Disclosure of Invention

The utility model provides a covering slag discharging device in a continuous casting crystallizer aiming at the defects existing in the prior art. The device can solve the problem that the influence on the quality of the steel billet caused by the fact that the casting powder cannot be discharged in time on site, and can effectively improve the working efficiency.

In order to achieve the purpose, the utility model adopts the following technical proposal that the device comprises a jet flow type distributor; the end A of the jet flow type distributor is communicated with a pressure air source, the end C of the jet flow type distributor is used as a protective slag jet orifice, the end B of the jet flow type distributor is communicated with a hollow shaft tube through a metal hose, the hollow shaft tube is used as a wheel shaft of two travelling wheels, and the two travelling wheels are used for travelling on the upper edge of the crystallizer; and a plurality of covering slag nozzles communicated with the inner cavity of the hollow shaft tube are arranged on the hollow shaft tube and between the two travelling wheels.

Furthermore, one end of the metal hose is detachably connected with the B end of the jet flow type distributor, and the other end of the metal hose is detachably connected with the hollow shaft tube.

Furthermore, the end A of the jet flow type distributor is connected with a pressure air source through an air inlet pipe, and an on-off valve is arranged on the air inlet pipe.

Furthermore, the jet type distributor comprises a T-shaped three-way pipe, wherein the A end of the T-shaped three-way pipe is communicated with a pressure gas source through a nozzle, the C end of the T-shaped three-way pipe and the A end of the T-shaped three-way pipe are positioned on the same horizontal line, and the pipeline where the B end of the T-shaped three-way pipe is positioned is respectively vertical to the pipeline where the A end is positioned and the pipeline where the C end is positioned; the pipeline where the C end of the T-shaped three-way pipe is located is a Venturi tube; and one end of the Venturi tube, which is far away from the end A, is provided with a casting powder spraying extension tube.

Further, a plurality of mold flux nozzles are arranged on the hollow shaft tube at equal intervals.

Furthermore, the center distance between the two walking wheels meets the requirement that the walking wheels can be placed on the crystallizer, and each walking wheel is in contact with the upper edge of the crystallizer below the walking wheel.

Furthermore, a circle of grooves are formed in the circumference of the walking wheel, when the walking wheel walks on the crystallizer, the walking wheel rides on the crystallizer, the upper edge of the crystallizer is embedded into the grooves, and the walking wheel can move back and forth along the upper edge of the crystallizer.

Still further, the width of the groove is equal to or greater than the width of the upper edge of the mold.

Furthermore, a control handle convenient to hold is arranged between the outer wall of the hollow shaft pipe and the two traveling wheels.

Furthermore, the control handle is an L-shaped rod body, and one end of the L-shaped rod body is connected with the hollow shaft tube.

Compared with the prior art the utility model discloses beneficial effect.

The utility model discloses covering slag eduction gear in continuous casting crystallizer, its application method is simple, the preparation instrument is with low costs, practical safety, high temperature resistant moreover. The continuous casting crystallizer molten steel liquid level fluctuation-free casting powder casting device has the advantages that the continuous casting crystallizer molten steel liquid level fluctuation-free casting powder discharging operation is realized, the casting blank quality is improved, and the steel leakage accidents caused by liquid level fluctuation in continuous casting are reduced.

Drawings

The present invention will be further described with reference to the accompanying drawings and the following detailed description. The scope of protection of the present invention is not limited to the following description.

FIG. 1 is an overall schematic view of a mold flux discharging device in a continuous casting mold.

Fig. 2 is a schematic view of the junction connection at both ends of a jet-type distributor.

In the figure, 1 is an air inlet pipe, 2 is a nozzle, 3 is an expansion chamber, 4 is a vacuum chamber, 5 is an end B, 6 is a metal hose, 7 is a traveling wheel, 8 is a hollow shaft pipe, 9 is a covering slag suction nozzle, 10 is covering slag, 11 is an upper edge of a crystallizer, 12 is the crystallizer, 13 is a covering slag jet outlet, 14 is a groove, 15 is a control handle, 16 is an end A, and 17 is an end C.

Detailed Description

As shown in fig. 1-2, a jet-type distributor; the end A16 of the jet flow type distributor is communicated with a pressure air source, the end C17 of the jet flow type distributor is used as a covering slag spraying port 13, the end B5 of the jet flow type distributor is communicated with a hollow shaft tube 8 through a metal hose 6, one end of the metal hose 6 is detachably connected with the end B5 of the jet flow type distributor, and the other end of the metal hose 6 is detachably connected with the hollow shaft tube 8. The metal hose 6 is used as a covering slag air inlet pipe.

The hollow shaft tube 8 is used as a shaft of the two travelling wheels 7, and the two travelling wheels 7 are used for travelling on the upper edge 11 of the crystallizer; and a plurality of covering slag nozzles 2 communicated with the inner cavity of the hollow shaft tube 8 are arranged on the hollow shaft tube 8 and between the two travelling wheels 7. The plurality of mold flux nozzles 2 are arranged on the hollow shaft tube 8 at equal intervals. The device is applied to a crystallizer casting area of a continuous casting operation area of a steel plant, and can quickly discharge the casting powder in the crystallizer 12 under the condition of not influencing the fluctuation of the liquid level of the molten steel of the crystallizer 12.

Specifically, during operation, the covering slag nozzle 2 is arranged on the covering slag powder layer of the crystallizer, the valve body of the air inlet pipe 1 is opened, compressed air is discharged from the C end 17 of the jet-flow distributor, the covering slag is replaced and discharged through the suction force of the B end 5 of the jet-flow distributor, the covering slag stops immediately after the red slag liquid level leaks out of the crystallizer 12, new covering slag is added quickly, and the operation is completed.

In embodiment 1, the a end 16 of the jet type distributor is connected with a pressure air source through an air inlet pipe 1, and the air inlet pipe 1 is provided with an on-off valve. The jet type distributor comprises a T-shaped three-way pipe, an A end 16 of the T-shaped three-way pipe is communicated with a pressure air source through a nozzle 2, a C end 17 of the T-shaped three-way pipe and the A end 16 of the T-shaped three-way pipe are located on the same horizontal line, a pipeline where a B end 5 of the T-shaped three-way pipe is located is respectively vertical to a pipeline where the A end 16 is located and a pipeline where the C end 17 is located; the pipeline where the C end 17 of the T-shaped three-way pipe is located is a Venturi tube; the venturi tube is provided with a casting powder spouting extension tube at an end thereof remote from the a end 16. The working principle of the jet flow type distributor is as follows: during the process from the high-speed ejection (nozzle 2) to the sudden expansion (expanding chamber) of the A end 16, a certain negative pressure difference (vacuum chamber 4) is generated, so that the medium of the bypass B end 5 is sucked in due to the negative pressure.

Compressed air used in an industrial field is connected with a jet type distributor, the flow of an air inlet pipe 1 is controlled by a ball valve, the jet type distributor is used for directly discharging after gas is opened, and a covering slag nozzle 2 in a crystallizer 12 quickly realizes the replacement of the covering slag in the crystallizer 12 through suction force brought by the directly discharged gas.

In embodiment 2, the center distance between the two walking wheels 7 is enough to place the walking wheels on the crystallizer, and each walking wheel 7 is in contact with the upper edge 11 of the crystallizer below the walking wheel. A circle of grooves 14 are formed in the circumference of the walking wheel 7, when the walking wheel 7 walks on the crystallizer, the walking wheel 7 rides on the crystallizer, the upper edge 11 of the crystallizer is embedded into the grooves 14, and the walking wheel 7 can move back and forth along the upper edge 11 of the crystallizer. The width of the groove 14 is equal to or greater than the width of the upper edge 11 of the crystallizer.

In embodiment 3, a control handle 15 convenient for holding is arranged between the outer wall of the hollow shaft tube 8 and the two travelling wheels 7. The control handle adopts an L-shaped rod body, and one end of the L-shaped rod body is connected with the hollow shaft tube 8.

The working principle is as follows.

1. A pressure air source is connected with the air inlet pipe 1, so that the air input and the air pressure meet the requirements.

2. The walking wheels 7 are arranged on the upper edge 11 of the crystallizer, and a groove 14 is arranged in the middle of each walking wheel 7 and can ride on the upper edge 11 of the crystallizer.

3. The control handle 15 is manually operated so that the casting powder suction nozzle 9 is arranged downwards and extends into the casting powder.

4. And connecting the head and the tail of the metal hose 6 with the corresponding interfaces.

5. The pressure air source of the air inlet pipe 1 is opened, and according to the Venturi tube principle, vacuum degree can be generated in the vacuum chamber 4, so that air of the covering slag air inlet pipe is sucked into the vacuum chamber 4. The mold flux outlet is aligned to an unmanned area, so that the position of the sprayed mold flux is convenient to collect.

6. The walking wheels 7 reciprocate on the crystallizer along the wheels 11 by manually operating the control handle 15, so that the protective slag suction nozzle 9 can cover the whole crystallizer section without dead angle, the protective slag can be effectively contacted with the protective slag suction nozzle 9, the protective slag is sucked by the suction nozzle, passes through the metal hose 6, reaches the vacuum chamber 4 and is sprayed out from the protective slag spray outlet 13 through the expansion chamber 3.

The utility model discloses a continuous casting crystallizer molten steel liquid level does not have undulant to have carried out the replacement operation to the covering slag, has improved the casting blank quality, has reduced the continuous casting because of the undulant bleed-out accident that causes of liquid level.

The utility model has the advantages.

1. The use method is simple, the cost of the manufacturing tool is low, and the device is practical, safe and high temperature resistant.

2. The continuous casting crystallizer molten steel liquid level fluctuation-free replacement operation of the covering slag is realized, the casting blank quality is improved, and the steel leakage accident caused by liquid level fluctuation in continuous casting is reduced.

It should be understood that the above detailed description of the present invention is only for illustrating the present invention and is not limited by the technical solutions described in the embodiments of the present invention, and those skilled in the art should understand that the present invention can still be modified or equivalently replaced to achieve the same technical effects; as long as the use requirement is satisfied, the utility model is within the protection scope.

Claims

1. A covering slag discharge device in a continuous casting crystallizer comprises a jet flow type distributor; the method is characterized in that: the end A of the jet flow type distributor is communicated with a pressure air source, the end C of the jet flow type distributor is used as a protective slag jet orifice, the end B of the jet flow type distributor is communicated with a hollow shaft tube through a metal hose, the hollow shaft tube is used as a wheel shaft of two travelling wheels, and the two travelling wheels are used for travelling on the upper edge of the crystallizer;

and a plurality of covering slag nozzles communicated with the inner cavity of the hollow shaft tube are arranged on the hollow shaft tube and between the two travelling wheels.

2. The mold flux discharging device in a continuous casting mold according to claim 1, wherein: one end of the metal hose is detachably connected with the B end of the jet flow type distributor, and the other end of the metal hose is detachably connected with the hollow shaft tube.

3. The mold flux discharging device in a continuous casting mold according to claim 1, characterized in that: the A end of the jet flow type distributor is connected with a pressure air source through an air inlet pipe, and an on-off valve is arranged on the air inlet pipe.

4. The mold flux discharging device in a continuous casting mold according to claim 1, wherein: the jet flow type distributor comprises a T-shaped three-way pipe, wherein the A end of the T-shaped three-way pipe is communicated with a pressure air source through a nozzle, the C end of the T-shaped three-way pipe and the A end of the T-shaped three-way pipe are positioned on the same horizontal line, and the pipeline where the B end of the T-shaped three-way pipe is positioned is respectively vertical to the pipeline where the A end is positioned and the pipeline where the C end is positioned; the pipeline where the C end of the T-shaped three-way pipe is located is a Venturi tube; and one end of the Venturi tube, which is far away from the end A, is provided with a casting powder spraying extension tube.

5. The mold flux discharging device in a continuous casting mold according to claim 1, characterized in that: the plurality of mold flux nozzles are arranged on the hollow shaft tube at equal intervals.

6. The mold flux discharging device in a continuous casting mold according to claim 1, wherein: the central space between the two walking wheels satisfies that the walking wheels can be placed on the crystallizer, and each walking wheel is in contact with the upper edge of the crystallizer below the walking wheel.

7. The mold flux discharging device in a continuous casting mold according to claim 1, characterized in that: the walking wheel is provided with a circle of grooves on the circumference, and when the walking wheel walks on the crystallizer, the walking wheel rides on the crystallizer, the upper edge of the crystallizer is embedded into the grooves, and the walking wheel can move back and forth along the upper edge of the crystallizer.

8. The mold flux discharging device in a continuous casting mold according to claim 7, wherein: the width of the groove is equal to or larger than the width of the upper edge of the crystallizer.

9. The mold flux discharging device in a continuous casting mold according to claim 1, wherein: and a control handle convenient to hold is arranged between the outer wall of the hollow shaft pipe and the two travelling wheels.

10. The mold flux discharging device in a continuous casting mold according to claim 9, wherein: the control handle adopts the L-shaped rod body, and one end of the L-shaped rod body is connected with the hollow shaft tube.