Vacuum degassing production device for rare earth steel for roller

Abstract

A vacuum degassing production device of rare earth steel for a roller comprises a walking mechanism which is arranged on the outer side of the top end of a shell and can rotate around the shell, the walking mechanism is provided with a blowing mechanism used for blowing steel slag on the top of the shell, and the blowing mechanism comprises an air spraying pipe and an air spraying nozzle. An outlet of the gas ejector pipe is communicated with a gas nozzle, an inlet of the gas ejector pipe is communicated with a high-pressure gas source, and the gas nozzle is located above the top of the shell. The sweeping mechanism is driven by the walking mechanism to rotate along the top of the shell, and residual steel slag on the top of the shell can be completely removed, so that no gap is generated between the cover body and the shell, a completely closed environment is provided for rare earth gold smelting, a vacuum state is formed, and subsequent refining treatment is facilitated. According to the utility model, the technical problem of poor sealing property caused by residual steel slag in the prior art is solved, and the production quality of rare earth steel is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of iron and steel metallurgy, and in particular to a vacuum degassing production device for rare earth steel used for rolls. Background Art

[0002] Rare earth steel, that is, steel containing a certain amount of rare earth, can significantly improve various properties of steel, such as corrosion resistance, wear resistance, drawability, toughness and plasticity, etc. by adding rare earth elements, so it has broad application prospects.

[0003] At present, a VD furnace is used for refining rare earth steel for functions such as degassing, deoxidizing, desulfurizing, homogenizing composition and temperature. However, during the production process, the top edge of the VD furnace shell usually contains residual steel slag. After covering the cover on the shell, it is easy to have a problem of poor sealing effect. At this time, the vacuum pumping time is increased, and after the vacuum pumping operation is completed, it is easy for oxygen to enter again, thus affecting the production quality of rare earth steel. This is the deficiency of the existing technology. Summary of the Utility Model

[0004] The purpose of the utility model is to solve the problems raised in the above background art, and then a vacuum degassing production device for rare earth steel used for rolls is proposed.

[0005] The technical solution adopted by the utility model to solve its technical problems is: a vacuum degassing production device for rare earth steel used for rolls, including a traveling mechanism arranged on the outer side of the top of the shell and capable of rotating around the shell, the traveling mechanism is equipped with a purging mechanism for purging the steel slag on the top of the shell, the purging mechanism includes a gas injection pipe and a gas injection nozzle, the outlet of the gas injection pipe is communicated with the gas injection nozzle, the inlet of the gas injection pipe is communicated with a high-pressure gas source, and the gas injection nozzle is located above the top of the shell.

[0006] The further improvement of the utility model is that the traveling mechanism includes a gear, a gear ring, an annular track and a slider, the annular track is installed on the outer side of the top of the shell, the top of the annular track is provided with a slider in a matching manner, the top of the slider is fixedly connected with a bracket; a gear ring is installed on the outer side of the annular track, the gear ring is meshed with the gear, and the gear is driven to rotate by a motor, and the motor is fixed on the bracket.

[0007] The further improvement of the utility model is that a gas injection nozzle lifting mechanism is also arranged on the bracket, the gas injection nozzle lifting mechanism includes a lifting rod, the top of the lifting rod is fixedly connected with one end of a horizontal rod, the other end of the horizontal rod is fixedly connected with a pipeline protection sleeve, and the gas injection pipe is located inside the pipeline protection sleeve.

[0008] A further improvement of the present utility model is that the lifting rod includes a rod body, the bracket is provided with a through hole matching with the rod body, the lower end of the rod body passes through the through hole, the rod body is provided with an external thread, an upper nut is fixed on the rod body above the bracket, and a lower nut is fixed on the rod body below the bracket.

[0009] A further improvement of the present utility model is that a slag baffle is fixed on the bracket and above the annular track.

[0010] A further improvement of the present utility model is that two sets of the traveling mechanism and the purging mechanism are respectively provided and symmetrically arranged on both sides of the housing.

[0011] A further improvement of the present utility model is that the annular track is fixed on an annular support plate, and the annular support plate is fixedly connected to the side wall of the housing.

[0012] The beneficial effects of the present utility model are as follows: The traveling mechanism drives the purging mechanism to rotate along the top of the housing, so that all the residual steel slag on the top of the housing can be completely removed, thereby preventing gaps from being generated between the cover and the housing, providing a completely enclosed environment for rare earth steel smelting to form a vacuum state, and facilitating subsequent refining treatment. The present utility model solves the technical problem of poor sealing caused by residual steel slag in the prior art and improves the production quality of rare earth steel. Description of the Drawings

[0013] Figure 1 is a structural schematic diagram of a specific embodiment of the present utility model;

[0014] Figure 2 is Figure 1 an enlarged view of the structure at A in

[0015] In the figure, 1 is the housing, 2 is the traveling mechanism, 21 is the gear, 22 is the bracket, 23 is the gear ring, 24 is the slider, 25 is the annular track, 26 is the motor, 3 is the purging mechanism, 31 is the air injection pipe, 32 is the pipe protection sleeve, 33 is the air injection nozzle, 4 is the ladle, 5 is the molten steel, 6 is the lifting lug, 7 is the air injection nozzle lifting mechanism, 71 is the lifting rod, 72 is the horizontal rod, 73 is the upper nut, 74 is the lower nut, 8 is the slag baffle, and 9 is the annular support plate. Specific Embodiment

[0016] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model. The present utility model will be further described in conjunction with the accompanying drawings and embodiments:

[0017] As Figure 1-2 shown, a vacuum degassing production device for rare earth steel used in rolls includes a traveling mechanism 2 arranged outside the top of a housing 1 and capable of rotating around the housing 1. The traveling mechanism 2 is equipped with a purging mechanism 3 for purging the steel slag on the top of the housing 1. The purging mechanism 3 includes a gas injection pipe 31 and a gas injection nozzle 33. The outlet of the gas injection pipe 31 is communicated with the gas injection nozzle 33, ensuring the smooth transmission of high-pressure gas. The inlet of the gas injection pipe 31 is communicated with a high-pressure gas source, providing strong power support for the purging process. The gas injection nozzle 33 is located above the top of the housing 1, making the purging effect more significant, capable of quickly removing the steel slag accumulated on the top of the housing 1, and enabling the cover to achieve efficient sealing of the housing 1.

[0018] The present utility model drives the purging mechanism 3 to rotate along the top of the housing 1 through the traveling mechanism 2, capable of completely removing the residual steel slag on the top of the housing 1, so that no gap will be generated between the cover and the housing, providing a completely enclosed environment for rare earth metal smelting to form a vacuum state, facilitating subsequent refining treatment.

[0019] Furthermore, two sets of the traveling mechanism 2 and the purging mechanism 3 are respectively arranged and symmetrically arranged on both sides of the housing 1, which not only improves the stability of the device, but also makes the purging process more uniform and efficient, ensuring that all areas on the top of the housing 1 can be fully cleaned.

[0020] Furthermore, the traveling mechanism 2 includes a gear 21, a gear ring 23, an annular track 25 and a slider 24. The annular track 25 is installed outside the top of the housing 1. The top of the annular track 25 is provided with a slider 24 in cooperation. The top of the slider 24 is fixedly connected to a bracket 22. The outer side of the annular track 25 is installed with a gear ring 23. The gear ring 23 meshes with the gear 21. The gear 21 is driven to rotate by a motor 26, and the motor 26 is fixed on the bracket 22. When the motor 26 is started, the motor 26 drives the gear 21 to rotate around the gear ring 23, and at the same time drives the bracket 22 and the slider 24 to rotate along the annular track 25. The bracket 22 drives the purging mechanism 3 to rotate, realizing the purging of the steel slag on the top of the housing 1.

[0021] A nozzle lifting mechanism 7 is further provided on the bracket 22. The nozzle lifting mechanism 7 includes a lifting rod 71. The top of the lifting rod 71 is fixed to one end of a horizontal rod 72. The other end of the horizontal rod 72 is fixed to a pipeline protective sleeve 32. The air injection pipe 31 is located within the pipeline protective sleeve 32. The nozzle can be flexibly adjusted in height according to actual needs, so as to adapt to the purging requirements under different production conditions.

[0022] In order to avoid interference caused by the purging mechanism 3 during the falling process of the cover body, in the present utility model, the lifting rod 71 includes a rod body. The bracket 22 is provided with a through hole that mates with the rod body. The lower end of the rod body passes through the through hole. External threads are provided on the rod body. An upper nut 73 is fixed on the rod body above the bracket 22, and a lower nut 74 is fixed on the rod body below the bracket 22. When it is necessary to cover the cover body on the housing 1, the upper nut 73 and the lower nut 74 are loosened, and then the entire purging mechanism 3 is rotated around the lifting rod 71 to provide a falling space for the falling of the cover body.

[0023] In order to better block the splashing of molten steel slag during the production process and prevent the molten steel slag from falling into the track, a slag baffle 8 is fixed on the bracket 22 and above the annular track 25, effectively preventing the molten steel slag from interfering with the traveling mechanism 2 and ensuring the smooth progress of the production process.

[0024] The annular track 25 is fixed on an annular support plate 9. The annular support plate 9 is fixedly connected to the side wall of the housing 1, enhancing the stability and load-bearing capacity of the annular track 25, making the traveling mechanism 2 more reliable and stable during operation.

[0025] The working principle of the present utility model is as follows: First, start the motor. The traveling mechanism 2 drives the purging mechanism 3 to purge the residual molten steel slag on the top of the housing; after the purging is completed, rotate the upper nut 73 and the lower nut 74 to rotate the purging mechanism to provide space for the subsequent falling of the cover body; then use a 50 / 10t crane to hoist the ladle 4 to the VD furnace station, connect argon and start blowing argon, measure temperature and take samples, cover the cover body, open the vacuum valve to start vacuum pumping, and make the vacuum degree reach below 67 Pa in the shortest possible time to perform deoxidation, dehydrogenation, denitrification, deep desulfurization, and removal of inclusions on the molten steel. After a period of time, make the gas content of the molten steel reach the requirements, then break the vacuum, remove the cover body, measure temperature and take samples, determine hydrogen, and after soft blowing reaches the process time, use the crane to hoist it to the continuous casting for pouring.

[0026] The basic principles, main features and advantages of the present utility model have been shown and described above. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and all these changes and improvements fall within the scope of protection required by the present utility model. The scope of protection required by the present utility model is defined by the appended claims and their equivalents.

Claims

1. A vacuum degassing production device for rare earth steel for rolls, characterized in that: The utility model comprises a traveling mechanism which is arranged on the outer side of the top end of the shell and can rotate around the shell, the traveling mechanism is equipped with a blowing mechanism for blowing away the steel slag on the top end of the shell, the blowing mechanism comprises an air jet pipe and an air jet nozzle, the outlet of the air jet pipe is connected with the air jet nozzle, the inlet of the air jet pipe is connected with a high-pressure gas source, and the air jet nozzle is located above the top end of the shell.

2. The vacuum degassing production device for rare earth steel for rolls according to claim 1, characterized in that: The walking mechanism includes a gear, a gear ring, an annular track and a slider. The annular track is installed on the outside of the top of the shell, and a slider is arranged on the top of the annular track. The top of the slider is fixedly connected with a bracket. A gear ring is installed on the outside of the annular track, and the gear ring is meshed with the gear. The gear is driven to rotate by an electric motor, and the motor is fixed on the bracket.

3. The vacuum degassing production device for rare earth steel for rolls according to claim 2, characterized in that: The bracket is also provided with an air nozzle lifting mechanism, which includes a lifting rod, the top of which is fixed to one end of a horizontal rod, the other end of which is fixed to a pipe protective sleeve, and the air nozzle is located in the pipe protective sleeve.

4. The vacuum degassing production device for rare earth steel for rolls according to claim 3, characterized in that: The lifting rod includes a rod body, the bracket is provided with a through hole matching the rod body, the lower end of the rod body passes through the through hole, the rod body is provided with an external thread, an upper nut is fixed on the rod body located at the upper part of the bracket, and a lower nut is fixed on the rod body located at the lower part of the bracket.

5. The vacuum degassing production device for rare earth steel for rolls according to claim 2, characterized in that: A slag blocking plate is fixed on the bracket and located above the annular track.

6. The vacuum degassing production device for rare earth steel for rolls according to claim 1, characterized in that: The walking mechanism and the purge mechanism are respectively provided with two groups, and are symmetrically arranged on both sides of the shell.

7. The vacuum degassing production device for rare earth steel for rolls according to claim 2, characterized in that: The annular track is fixed on an annular support plate, and the annular support plate is fixedly connected to the side wall of the shell.

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