CN211839478U

CN211839478U - Dust removal device for electroslag remelting

Info

Publication number: CN211839478U
Application number: CN202020088209.9U
Authority: CN
Inventors: 吴轲源; 吴高路; 王亮; 江裕恒; 徐良清; 刘清华; 斯庭智; 徐良乐
Original assignee: Maanshan Xuyang Machinery Co ltd
Current assignee: Maanshan Xuyang Machinery Co ltd
Priority date: 2020-01-14
Filing date: 2020-01-14
Publication date: 2020-11-03
Anticipated expiration: 2030-01-14

Abstract

The utility model discloses a dust collector for electroslag remelting belongs to ferrous metallurgy technical field. The air suction device comprises a shell and an air suction mechanism, wherein the shell is connected with the air suction mechanism; the cross section of the shell is generally annular, comprises an upper shell, a lower shell and an outer shell at the outer side, and is matched with the shape of a furnace opening of the crystallizer; the shell is arranged above a furnace mouth of the crystallizer in a suspended manner; the shell is also provided with a retractable cabin door. The utility model discloses the suction capacity of dust excluding hood is great, and the dust excluding hood is unsettled setting in the top of crystallizer fire door simultaneously, supports the suction pump pipeline of dust excluding hood casing through adjusting, can realize that the position of dust excluding hood is adjustable.

Description

Dust removal device for electroslag remelting

Technical Field

The utility model belongs to the technical field of ferrous metallurgy, more specifically say, relate to a dust collector for electroslag is remelted.

Background

The electroslag remelting method is an important method for producing high-quality alloy steel, and in the smelting process, in order to remove phosphorus and sulfur in electric molten steel and keep the alkalinity of the molten steel, an electroslag auxiliary material fluorite (CaF) is generally added into the molten steel in production₂) The slag pool formed by melting the electroslag auxiliary material can form a layer of thin slag shell on the inner wall of the crystallizer, and the formation of the slag shell can improve the surface quality of an electroslag ingot and reduce the generation of toad skin, slag channels and slag scars on the surface. In addition, the electroslag shell can also play a role in heat preservation and insulation, so that heat is conducted to the lower part, the directional crystallization of the steel ingot from bottom to top is facilitated, and the product quality is obviously improved.

However, fluorite as an auxiliary material of electroslag volatilizes fluoride at high temperature, generates a large amount of dust and smoke, and causes great harm to the environment and the health of operators. At present, most of the existing dust removing devices are dust removing covers in semi-circular ring shapes, and the dust removing effect is poor due to the fact that the dust removing covers are not closed, and the dust removing covers are too close to a furnace mouth of a crystallizer and can easily suck away argon protective atmosphere blown into the crystallizer.

To above-mentioned dust excluding hood not sealed, dust removal effect is poor and too near apart from crystallizer fire door, inhales away the problem of argon gas protective atmosphere easily, and some prior art has also considered, for example, chinese patent application, the application number is: CN201621489475.2, published date: 2018, 1, 5 and the like, discloses an electroslag remelting cover type air-assisted dust removal device, which comprises a false electrode supporting platform, an insulating ring, a waste gas collecting device and an air suction pump, wherein the false electrode supporting platform is fixedly connected with a false electrode, the waste gas collecting device comprises an air cover and a collecting box, a through hole and an air inlet hole are formed in the middle of the air cover, the collecting box is arranged above the air cover, the air inlet hole is formed around the through hole, and the air inlet hole is communicated with the collecting box; the waste gas collecting device is arranged on the false electrode supporting platform, and the insulating ring is arranged between the waste gas collecting device and the false electrode supporting platform. The disadvantages of this device are: although the dust hood is arranged at a certain height of the crystallizer furnace, because the dust hood is in a hood type and is fixed on the supporting platform, a deoxidizing agent is not easy to be added into the crystallizer in the remelting process; in addition, the device absorbs dust and smoke through the small holes of the collecting box, so that the air suction amount is small and the air suction is slow.

In view of the problem of small absorption of the small hole suction gas of the dust removing device, some prior arts also consider, for example, chinese patent application, application number: CN201820907674.3, published date: 2019, 1 month and 1 day, discloses a dust removal protection cover for electroslag remelting, which comprises a support protection device and a dust removal and collection device above the support protection device, wherein the support protection device comprises a protection cover plate and a support bracket; the protective cover plate consists of an upper surface and a side surface of the protective cover plate, the upper surface of the protective cover plate is in a concentric ring shape, and the side surface of the protective cover plate is in a cylindrical shape; the dust removal and collection device comprises an upper surface, a lower surface and side surfaces, the upper surface and the lower surface of the dust removal and collection device are concentric rings, and the side surfaces of the dust removal and collection device are cylinders with small upper parts and large lower parts; the support bracket is composed of reinforcing steel bars, one end of the support bracket is welded on the protective cover plate, the other end of the support bracket is welded on the lower surface of the dust removal and collection device, and the support bracket has the following defects that: on one hand, the device is fixedly welded at the mouth of the crystallizer through a support frame, so that the position of the dust removal and collection device is not adjustable, and the application range is small; and because the temperature of the crystallizer furnace mouth is overhigh, the supporting frame is directly arranged on the furnace mouth, and is easy to deform after being applied for a long time, thereby causing potential safety hazards. On the other hand, because the dust removal and collection device is fixed on the crystallizer through the support frame, the center of the inner circle of the dust removal and collection device needs to be aligned with the center of the inner circle of the crystallizer during design and installation, and the remelting electrode can be aligned with the center of the crystallizer.

Disclosure of Invention

1. Problems to be solved

The utility model provides a dust collector for electroslag remelting, which aims at solving the problems of small suction capacity or unadjustable position and small application range of the existing dust excluding hood. The utility model discloses improve the dust excluding hood, with the unsettled setting of dust excluding hood in the top of crystallizer fire door, realize that the position of dust excluding hood is adjustable when guaranteeing the air intake.

2. Technical scheme

In order to solve the above problems, the utility model adopts the following technical proposal.

A dust removal device for electroslag remelting comprises a shell and a gas suction mechanism, wherein the shell is connected with the gas suction mechanism; the cross section of the shell is generally annular, comprises an upper shell, a lower shell and an outer shell at the outer side, and is matched with the shape of a furnace opening of the crystallizer; the shell is arranged above a furnace mouth of the crystallizer in a suspended manner; the shell is also provided with a retractable cabin door.

The inner circle of the annular shell is opened, so that the air suction amount is larger during operation; simultaneously, support the casing through the suction mechanism, unsettled setting is in the top of crystallizer fire door, does not contact with the crystallizer, can prevent in the course of the work that because the too high dust collector that leads to of temperature of crystallizer takes place to warp, reduction of service life. In addition, in the remelting process, an operator can open the cabin door arranged on the shell by operation, so that operations such as adding a deoxidizing agent can be facilitated, and the remelting device is convenient, fast and safe.

According to a further technical scheme, the shell is located 10-20cm above a furnace opening of the crystallizer.

This design both can prevent that the dust excluding hood from siphoning away the argon gas that the crystallizer fire door blew off, also can not influence life because high temperature leads to the dust excluding hood casing to be heated and warp, simultaneously, can also guarantee good dust removal effect.

According to a further technical scheme, the air suction mechanism comprises an air suction pump and an air suction pump pipeline, and the air suction pump is connected with the air suction pump pipeline; the shell is provided with a butt joint pipeline, and the suction pump pipeline is sleeved on the butt joint pipeline.

The suction pump pipeline is connected with the butt joint pipeline, so that the dust hood shell can be supported, and the dust hood can be suspended above a furnace mouth of the crystallizer.

According to a further technical scheme, a limiting column is arranged on the butt joint pipeline; be provided with the recess on the getter pump pipeline, recess and spacing post cooperation set up to can block spacing post.

Through the cooperation of recess and spacing post, can block the casing on the suction pump pipeline, prevent to drop because of vibration or other circumstances, cause the emergence of dangerous accident.

According to the further technical scheme, the diameter of the inner circle of the shell is larger than that of the remelting electrode, and the diameter of the outer circle of the shell is larger than that of the outer circle of a furnace opening of the crystallizer.

The design can ensure that dust-containing gas floating from the upper part of the furnace mouth of the crystallizer can be sucked into the dust hood through the inner circle of the shell and cannot overflow into the outside air to cause air pollution.

According to the technical scheme, the inner circle radius of the cabin door is the same as that of the shell, and the outer circle radius of the cabin door is smaller than that of the shell.

The design can ensure that the cabin door slides in the shell, and the lower shell of the shell can play a role in fixing and supporting the cabin door.

According to the further technical scheme, the pair of cabin doors are symmetrically arranged on the shell, so that the opening degree of the cabin doors is larger, and the opening and closing processes are more flexible.

According to a further technical scheme, a sliding rail is arranged on the shell; the slide rail is arc-shaped, and the circle center of the slide rail is superposed with the circle center of the inner circle of the shell; the position of the cabin door corresponding to the sliding rail is provided with a handle, the handle can move in the sliding rail and drives the cabin door to open and close, and an operator can control the opening and closing of the cabin door through operating the handle.

Further technical scheme, the cover has the rubber protective sheath on hand, scald when can preventing operating personnel from sliding the handle.

3. Advantageous effects

Compared with the prior art, the beneficial effects of the utility model are that:

(1) the dust hood of the utility model is annular, the inner side shell of the inner circle is provided with an opening, the air suction mechanism is connected with the dust hood, the dust-containing gas rising from the furnace mouth is absorbed through the opening at the inner side of the ring, and the air suction amount is larger; and the dust hood is suspended at a certain height of the furnace mouth of the crystallizer, is not directly contacted with the furnace mouth of the crystallizer, cannot deform due to high temperature, and prolongs the service life.

(2) The utility model discloses a dust excluding hood is 15cm apart from crystallizer fire door height, and the design of this height both can prevent that the dust excluding hood from influencing the interior atmosphere of stove and can prevent its easy thermal deformation apart from the too closely meeting of fire door, influences life, can also guarantee the inspiratory work efficiency of aspirator pump moreover.

(3) The utility model discloses a dust excluding hood is connected with the aspirator pump pipeline of suction mechanism, and the aspirator pump pipeline can play the effect of a support to the dust excluding hood, can make the unsettled setting of dust excluding hood in the top of crystallizer fire door to the casing that can adjust the dust excluding hood through the height of adjusting the aspirator pump pipeline and the height of crystallizer fire door.

(4) The utility model discloses a recess on the aspirator pump pipeline can be spacing to the spacing post that docks the pipeline on the dust excluding hood, plays a fixed effect to the dust excluding hood, can be at the aspirator pump during operation, prevents to lead to the emergence of the dangerous accident that the dust excluding hood drops from the aspirator pump pipeline and causes because of the vibration.

(5) The utility model discloses a circle diameter ratio remelting electrode's diameter is big in the dust excluding hood, and remelting electrode can pass the interior circle of dust excluding hood and place in the crystallizer, and the diameter ratio crystallizer fire door's of excircle diameter is big, and the aspirator pump can be with the gaseous whole suction dust excluding hoods that rise in at the during operation.

(6) The hatch door of the utility model is designed with a pair of quarter ring shape, the diameter of the inner circle is the same as that of the inner circle of the dust excluding hood, and the diameter of the outer circle is smaller than that of the outer circle of the dust excluding hood, so that the hatch door can conveniently slide in the dust excluding hood; the design can make the opening and closing range of the cabin door larger, and is more beneficial to the operation of operators.

(7) The utility model discloses the handle of hatch door passes the casing of dust excluding hood to can slide along the track, opening and shutting of simultaneous control hatch door, setting up of handle can make things convenient for operating personnel to operate, simultaneously, because whole working process is gone on under the environment of high temperature, set up the thermal-insulated rubber protective sheath of one deck on hand, scald when can preventing operating personnel slip handle.

Drawings

FIG. 1 is a schematic structural view of the dust hood of the present invention;

FIG. 2 is a schematic structural view of the butt joint part of the housing and the air suction mechanism of the dust hood of the present invention;

FIG. 3 is a schematic structural view of the housing of the dust hood of the present invention;

fig. 4 is a schematic structural view of the suction pump mechanism of the dust excluding hood of the present invention.

In the figure:

1. a housing; 11. an upper housing; 12. a lower housing; 13. an outer housing;

2. a cabin door; 3. a handle; 4. butting pipelines; 5. a limiting column; 6. a slide rail;

7. a suction mechanism; 71. an air intake pump conduit; 72. a getter pump;

8. a groove; 9. a crystallizer.

Detailed Description

The invention will be further described with reference to specific embodiments and drawings.

Example 1

The embodiment provides a dust removal device for electroslag remelting, which is shown in fig. 1 and fig. 2 and comprises a housing 1 and a gas suction mechanism 7, wherein the housing 1 is connected with the gas suction mechanism 7; the cross section of the shell 1 is generally annular and comprises an upper shell 11, a lower shell 12 and an outer shell 13 at the outer side, the structure of the shell 1 is shown in figure 3, and the shape of the shell 1 is matched with the shape of a furnace mouth of the crystallizer 9; the shell 1 is supported by the air suction mechanism 7, is suspended above a furnace mouth of the crystallizer 9 and has a certain distance from the furnace mouth of the crystallizer 9; the shell 1 is also provided with an openable and closable cabin door 2.

Because the shell 1 is suspended above the furnace mouth of the crystallizer 9, an atmosphere protection device can be arranged at the furnace mouth. Because the temperature of the furnace mouth is higher, the density of the atmosphere in the furnace is small, the dust-containing gas can automatically rise, the inner circle of the shell 1 is opened, and the air suction mechanism 7 can suck the dust-containing gas rising from the furnace mouth of the crystallizer 9 from the inner circle of the shell 1 and then discharge the dust-containing gas when in work, compared with the small-hole air suction mode in the prior art, the air suction amount is larger; moreover, the shell 1 can be suspended above the furnace mouth of the crystallizer 9 only through the support of the air suction mechanism 7, so that the shell is not in contact with the crystallizer 9, the deformation of the dust removal device caused by the too high temperature of the crystallizer 9 in the working process can be prevented, and the service life is shortened. Moreover, because the cabin door 2 can be opened and closed, in the remelting process, an operator can manually open the cabin door 2 arranged on the shell 1, so that operations such as adding a deoxidizing agent are facilitated, and the operation is convenient and safe.

In order to ensure the service life of the dust hood and the dust removal effect, the shell 1 is arranged 10-20cm above the furnace mouth of the crystallizer 9. Through many times calculation and experiment, set up casing 1 in the fire door top 15cm of crystallizer 9 in this embodiment, the design of this height both can prevent that the dust excluding hood from siphoning away the argon gas that the 9 fire doors of crystallizer blown out, also can not influence life because high temperature leads to the casing 1 thermal deformation of dust excluding hood, simultaneously, also can guarantee good dust removal effect, can not cause the relatively poor problem of dustproof effect because of being too high apart from the fire door.

Example 2

The embodiment provides a dust removal device for electroslag remelting, which is further improved on the basis of embodiment 1, as shown in fig. 4, the suction mechanism 7 includes a suction pump 72 and a suction pump pipeline 71, the suction pump 72 is connected with the suction pump pipeline 71, and in order to ensure the working efficiency of the suction pump, the outer diameter of a butt joint pipeline is set to be 200 mm; the shell 1 is provided with a butt joint pipeline 4, and the air suction pump pipeline 71 is sleeved on the butt joint pipeline 4.

The butt joint pipeline 4 on the shell 1 is connected with the air suction pump pipeline 71, therefore, the air suction pump pipeline 71 can play a supporting role for the dust excluding hood shell 1, can be suspended above the furnace mouth of the crystallizer 9, and can adjust the heights of the shell 1 of the dust excluding hood and the furnace mouth of the crystallizer 9 by adjusting the height of the air suction pump pipeline 71.

Meanwhile, the shell 1 is made of nonmagnetic stainless steel and has the thickness of 1-1.5mm, so that the dust hood shell 1 has certain strength and is light and convenient, and the burden of the suction pump pipeline 71 is reduced.

Because the aspirator pump 72 can vibrate during operation, only the pipeline is butted without taking protective measures, and because of the dead weight of the dust hood shell 1 and the vibration of the pipeline, the shell 1 can fall off from the aspirator pump pipeline 71, causing dangerous accidents. Therefore, the butt joint pipeline 4 is provided with a limiting column 5; be provided with recess 8 on the getter pump pipeline 71, recess 8 and spacing post 5 cooperation set up to can block spacing post 5.

The mounting mode of the air suction pump pipeline 71 and the butt joint pipeline 4 is as follows: incline certain angle with casing 1 of dust excluding hood earlier, insert spacing post 5 in the recess 8, slide to the bottommost back, again with casing 1 rotatory to the level to guarantee that recess 8 can block spacing post 5, guarantee that casing 1 fixes on getter pump pipeline 71.

Through the cooperation of recess 8 and spacing post 5 use, can fix casing 1 on aspirator pump pipeline 71, can prevent to lead to the emergence of the dangerous accident that dust excluding hood casing 1 drops from aspirator pump pipeline 71 and cause because of the vibration.

Example 3

The embodiment provides a dust removal device for electroslag remelting, which is further improved on the basis of the embodiment 2, wherein the diameter of the inner circle of the shell 1 is larger than that of the remelting electrode, and the diameter of the outer circle of the shell 1 is larger than that of the outer circle of the furnace mouth of the crystallizer 9.

The design can ensure that dust-containing gas floating from the upper part of the furnace mouth of the crystallizer 9 can be sucked into the dust hood through the inner circle of the shell 1 and cannot overflow into the outside air to cause air pollution.

Example 4

The embodiment provides a dust removal device for electroslag remelting, which is further improved on the basis of embodiment 3, wherein the inner circle radius of the cabin door 2 is the same as that of the shell 1, and the outer circle radius of the cabin door 2 is smaller than that of the shell 1. And the hatch door 2 is provided with a pair, symmetrically mounted on the housing 1.

Compared with the arrangement of one cabin door 2, the arrangement of the pair of cabin doors 2 has the advantages that the opening and closing degree of the cabin doors 2 is larger, and the opening and closing process is more flexible. In the embodiment, the radius of the excircle of the cabin door 2 is 5mm smaller than that of the excircle of the shell 1, and the gap is smaller, so that the sucked gas is not easy to diffuse to the outside, and the cabin door 2 is convenient to slide in the shell 1 of the dust hood. A part of the cabin door 2 is arranged inside the casing 1, so that the lower casing 12 can play a role of fixing and supporting the cabin door 2, and the cabin door 2 cannot fall off, for example, the casing 1 in this embodiment is designed with a 120 ° gap, two 90 ° circular ring-shaped movable cabin doors 2 are installed at the gap, and 30 ° of each cabin door 2 is hidden inside the casing 1, so that the casing 1 can play a role of fixing and supporting the cabin door 2.

Example 5

The present embodiment provides a dust removing device for electroslag remelting, which is further improved on the basis of embodiment 4, as shown in fig. 1, a sliding rail 6 is arranged on the housing 1, the sliding rail 6 can be arranged on the upper housing 11 or the outer housing 13, since the diameter of the dust removing cover is generally slightly larger, if the sliding rail is arranged on the outer housing 13, it is inconvenient for an operator to operate, and therefore, in order to facilitate the operation of the operator and in consideration of personal safety of the operator, in the present embodiment, the sliding rail 6 is arranged on the upper housing 11.

The slide rail 6 is arc-shaped, and the circle center of the slide rail is superposed with the circle center of the inner circle of the shell 1; the position of the cabin door 2 corresponding to the slide rail 6 is provided with a handle 3, the handle 3 can move in the slide rail 6 and drive the cabin door 2 to open and close, and an operator can control the cabin door 2 to slide in the shell 1 and control the opening and closing of the cabin door 2 by operating the handle 3.

Under the normal condition, a deoxidizing agent needs to be added into the crystallizer 9 in the electroslag remelting process, so that an operator can add the deoxidizing agent into the crystallizer 9 by only sliding the handle 3 and opening the cabin door 2, and after the addition is completed, the sliding handle 3 can close the cabin door 2, so that the operation is simple and convenient.

Because whole working process goes on under the environment of high temperature, and the dust excluding hood all is made of steel material, because the heat conductivility of steel is better, therefore the dust excluding hood temperature is higher, and operating personnel direct operation handle 3 hatchdoor 2 that opens and shuts causes the scald very easily, consequently has rubber protective cover at 3 overcoat of handle, can prevent to scald when operating personnel slides handle 3.

In order to facilitate the operator's manipulation of the handle 3, the diameter of the handle 3 is set to 20mm and the height is set to 100 mm.

The examples of the utility model are only right the utility model discloses a preferred embodiment describes, and not right the utility model discloses design and scope are injectd, do not deviate from the utility model discloses under the prerequisite of design idea, the field engineering technical personnel are right the utility model discloses a various deformation and improvement that technical scheme made all should fall into the protection scope of the utility model.

Claims

1. A dust removal device for electroslag remelting comprises a shell (1), wherein the cross section of the shell (1) is generally annular, comprises an upper shell (11), a lower shell (12) and an outer shell (13) at the outer side, and is matched with the shape of a furnace opening of a crystallizer (9); the method is characterized in that: the air suction device is characterized by also comprising an air suction mechanism (7), wherein the shell (1) is connected with the air suction mechanism (7); the shell (1) is arranged above a furnace mouth of the crystallizer (9) in a suspended manner; the shell (1) is also provided with a retractable cabin door (2).

2. The dust removing device for electroslag remelting according to claim 1, wherein: the shell (1) is positioned 10-20cm above the furnace mouth of the crystallizer (9).

3. The dust removing device for electroslag remelting according to claim 2, wherein: the air suction mechanism (7) comprises an air suction pump (72) and an air suction pump pipeline (71), and the air suction pump (72) is connected with the air suction pump pipeline (71); the shell (1) is provided with a butt joint pipeline (4), and the air suction pump pipeline (71) is sleeved on the butt joint pipeline (4).

4. A dust removing device for electroslag remelting according to claim 3, wherein: a limiting column (5) is arranged on the butt joint pipeline (4); be provided with recess (8) on getter pump pipeline (71), recess (8) and spacing post (5) cooperation set up to can block spacing post (5).

5. A dust removing device for electroslag remelting according to claim 1, 2, 3 or 4, wherein: the inner circle diameter of the shell (1) is larger than that of the remelting electrode, and the outer circle diameter of the shell (1) is larger than that of a furnace mouth of the crystallizer (9).

6. The dust removing device for electroslag remelting according to claim 5, wherein: the inner circle radius of the cabin door (2) is the same as that of the shell (1), and the outer circle radius of the cabin door (2) is smaller than that of the shell (1).

7. The dust removing device for electroslag remelting according to claim 6, wherein: the cabin doors (2) are provided with a pair and symmetrically arranged on the shell (1).

8. The dust removing device for electroslag remelting according to claim 7, wherein: a slide rail (6) is arranged on the shell (1); the slide rail (6) is arc-shaped, and the circle center of the slide rail is superposed with the circle center of the inner circle of the shell (1); a handle (3) is arranged on the cabin door (2) corresponding to the slide rail (6), and the handle (3) can move in the slide rail (6) and drives the cabin door (2) to be opened and closed.

9. The dust removing device for electroslag remelting according to claim 8, wherein: the handle (3) is sleeved with a rubber protective sleeve.