A splash-proof device for the cover and charging port of a LF refining furnace

Abstract

The utility model relates to a splash-proof device for a furnace cover charging port, belongs to the field of metallurgical technology, is arranged at the charging port of a furnace cover of an LF refining furnace, comprises a baffle and a guide plate, the guide plate is arranged on the outer side of the baffle; the upper end of the baffle is movably connected to the highest point of the upper edge of the furnace cover charging port, the baffle is vertically arranged from top to bottom along the upper edge of the furnace cover charging port, and the lower end of the baffle is located at the lower edge of the furnace cover charging port; the guide plate comprises a support plate and an inclined plate, one end of the support plate is inclined and extended outward to form an inclined plate, an obtuse angle is formed clockwise between the inclined plate and the support plate, one end of the support plate is arranged at the outer peripheral edge of the lower edge of the furnace cover charging port, the support plate is vertically arranged from bottom to top along the lower edge of the furnace cover charging port, and the other end of the support plate is extended with an inclined plate; the splash-proof device effectively avoids slag external spraying and scalding accidents occurring during manual charging, ensures the safety of the charging worker of the LF refining furnace, and the materials are smoothly and completely added to the furnace, with high utilization rate.

Description

Technical Field

[0001] The utility model relates to a furnace cover and a device to prevent splashing of a charging port of the furnace cover, in particular to a furnace cover and a device to prevent splashing of a charging port of a LF refining furnace, belonging to the technical field of metallurgy. Background Art

[0002] During the smelting process of the LF refining furnace, different alloys will be added according to the different types of steel being smelted. Most of them are added from the silo, but some precious alloys, deoxidation materials and other materials are added into the furnace manually through the charging port on the refining furnace cover. During the adding process, due to the dampness of the materials and the large specific gravity of the alloys, molten steel and slag will splash, which is very likely to cause scalding accidents. There is also a risk of material shaking out during the adding process, which reduces the material utilization rate and affects the metallurgical quality.

[0003] At present, patent CN205027129U discloses a splash-proof and scald-proof feeding device, which includes a supporting platform, a feeding port, a feeding slide, a feeding baffle, and a feeding nozzle, which are installed on the side wall of the high-temperature furnace. The feeding baffle is installed on the upper edge of the feeding port through a baffle shaft, and the lower edge of the feeding baffle is placed on the inner side of the lower edge of the feeding port. The device is equipped with a feeding baffle at the feeding port, which can be pushed open by the zinc ingot during feeding. Once the zinc ingot enters the furnace, it can be automatically closed under the action of gravity to prevent the feeding personnel from being scalded by the splashed zinc liquid. However, the device is installed on the side wall of the furnace, has a large structure, high manufacturing cost, and is inconvenient to install. The flat pulley must be fed into the feeding plate to feed all the materials. Moreover, the device is not suitable for the LF refining furnace cover with the opening facing downward.

[0004] Therefore, in order to develop a LF refining furnace cover and a furnace cover charging port splash prevention device that can overcome the above defects has become a technical problem that needs to be solved urgently by technical personnel in this field. Utility Model Content

[0005] The technical problem to be solved by the utility model is to overcome the shortcomings of the prior art and provide an anti-splashing device for a LF refining furnace cover and a furnace cover charging port, the anti-splashing device effectively avoids slag external spraying and scalding accidents occurring during manual charging, ensures the safety of the LF refining furnace charging workers, and ensures that materials are smoothly and completely added to the furnace with high utilization rate.

[0006] In order to solve the above technical problems, the utility model provides a furnace cover charging port splash prevention device, which is arranged at the charging port of the LF refining furnace cover, and includes a baffle and a guide plate, the baffle and the guide plate are arranged at the charging port of the furnace cover, and the guide plate is arranged on the outside of the baffle;

[0007] The upper end of the baffle is movably connected to the highest point of the upper edge of the furnace cover charging port, the baffle is vertically arranged from top to bottom along the upper edge of the furnace cover charging port, and the lower end of the baffle is located at the lower edge of the furnace cover charging port;

[0008] The guide plate includes a support plate and an inclined plate. One end of the support plate extends outwardly to form the inclined plate. An obtuse angle is formed between the inclined plate and the support plate in a clockwise direction. One end of the support plate is arranged at the outer peripheral edge of the lower edge of the furnace cover charging port. The support plate is vertically arranged from bottom to top along the lower edge of the furnace cover charging port. The other end of the support plate is extended with an inclined plate.

[0009] The technical solution further defined in the utility model is:

[0010] Furthermore, in the aforementioned furnace cover charging port splash prevention device, the baffle is connected to the furnace cover charging port by a hook.

[0011] Technical effect: the utility model punches a hole at the feeding port so as to adopt a hooking method, which is convenient for installation and disassembly, and is convenient for repair and replacement when the baffle is damaged. It is easy to use and improves efficiency.

[0012] In the aforementioned furnace cover charging port splash prevention device, the furnace cover charging port of the LF refining furnace is a duckbill type structure, and the furnace cover charging port includes the upper edge of the furnace cover charging port and the lower edge of the furnace cover charging port. The upper edge of the furnace cover charging port is inclined, and the lower edge of the furnace cover charging port is horizontally arranged. The angle formed by the upper edge of the furnace cover charging port and the lower edge of the furnace cover charging port clockwise is an acute angle.

[0013] Technical effect: The utility model is provided with a corresponding anti-splashing device according to the structure of the charging port of the furnace cover of the LF refining furnace, and directly utilizes the structure of the charging port for improvement, instead of installing an additional set of devices at the charging port. The structure is simpler, easy to use, and low in cost, and is more suitable for this shape of charging port.

[0014] In the aforementioned furnace cover charging port splash prevention device, the height of the guide plate is 5-10 cm.

[0015] Technical effect: The utility model limits the height of the guide plate. If it is too high, it will easily affect the normal feeding and bring inconvenience to the feeding. If it is too low, it will not have a very high anti-splashing effect. The utility model limits the height without affecting the normal and anti-splashing, and at the same time, the material can be poured into the furnace well through the slope between the inclined panel and the support plate, avoiding the material from scattering, improving the accuracy of feeding, and improving the quality.

[0016] In the aforementioned furnace cover charging port splash prevention device, the baffle plate and the guide plate are both made of iron plates.

[0017] In the aforementioned furnace cover charging port splash prevention device, the obtuse angle formed between the inclined plate and the support plate in a clockwise direction is 90-140°.

[0018] Technical effect, strictly controlled within 90-140°, ensuring good guiding effect and preventing splashing.

[0019] The present invention also provides a furnace cover of an LF refining furnace, on which the furnace cover is provided with the above-mentioned furnace cover charging port splash prevention device.

[0020] The beneficial effects of the utility model are:

[0021] The utility model arranges a baffle at the feeding port according to the automatic rebound principle, utilizes the baffle's own gravity to sag and cover the feeding port, and during the feeding process, utilizes the material gravity and part of the kinetic energy given by humans to knock open the baffle of the feeding port, and after the material enters the furnace, the feeding door baffle is affected by its own gravity to automatically cover the feeding port to prevent the slag in the furnace from splashing and flying out to injure people, and during the feeding process, the material is blocked by the guide plate and the material will not fly out of the feeding port, so that the material can completely enter the furnace and splashing is further prevented. Because of the special feeding port structure on the cover of the refining furnace, the baffle cannot completely block it, and splashing is further prevented under the action of the guide plate, thereby improving the anti-splashing effect, effectively avoiding slag external spraying and scalding accidents occurring during manual feeding, and ensuring the safety of the feeders of the LF refining furnace. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a structural schematic diagram of a furnace cover charging port splash prevention device installed on a furnace cover according to an embodiment of the utility model;

[0023] Figure 2 for Figure 1 A schematic diagram of the structure in which the middle baffle is arranged at the charging port of the furnace cover;

[0024] Figure 3 for Figure 1 A schematic diagram of the structure of the middle guide plate;

[0025] In the figure: 1-baffle, 2-guide plate, 21-support plate, 22-inclined plate, 3-upper edge of the charging port of the furnace cover, 4-lower edge of the charging port of the furnace cover. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them; the technical features involved in the various implementation methods of the utility model described below can be combined with each other as long as they do not conflict with each other. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Example 1

[0027] This embodiment provides a furnace cover charging port splash prevention device, the structure of which is as follows Figure 1-3As shown, it is arranged at the charging port of the LF refining furnace cover, including a baffle 1 and a guide plate 2 both made of iron plates, the baffle 1 and the guide plate 2 are arranged at the charging port of the furnace cover, the guide plate 2 is arranged on the outside of the baffle 1, and the height of the guide plate 2 is 5-10cm, which is convenient for preventing splashing and guiding materials while ensuring normal charging;

[0028] The charging port of the furnace cover of the LF refining furnace is a duckbill type structure, and the charging port of the furnace cover includes an upper edge 3 of the charging port and a lower edge 4 of the charging port. The upper edge 3 of the charging port is inclined, and the lower edge 4 of the charging port is horizontally set with a width of 350mm. The distance from the upper edge of the charging port to the highest point to the lower edge of the charging port is 400mm, and the angle formed by the upper edge 3 of the charging port and the lower edge 4 of the charging port in a clockwise direction is 60°;

[0029] A through hole is provided at the highest point of the upper edge 3 of the furnace cover charging port, the upper end of the baffle 1 is connected to the highest point of the upper edge 3 of the furnace cover charging port by a hook, the baffle 1 is vertically arranged from top to bottom along the upper edge 3 of the furnace cover charging port, the lower end of the baffle 1 is located at the lower edge 4 of the furnace cover charging port, the height of the baffle is 370 mm, and the width is 330 mm. The guide plate 2 includes a support plate 21 and an inclined panel 22, one end of the support plate 21 is inclined outward and extends to form the inclined panel 22, and an obtuse angle of 90-140° is formed clockwise between the inclined panel 22 and the support plate 21, one end of the support plate 21 is arranged at the outer peripheral edge of the lower edge 4 of the furnace cover charging port, the support plate 21 is vertically arranged from bottom to top along the lower edge 4 of the furnace cover charging port, and the other end of the support plate 21 is extended with an inclined panel 22.

[0030] In this embodiment, the width of the baffle is slightly smaller (less than 0.2-0.5 cm) than the width of the lower edge of the furnace cover charging port, and the height is determined according to the inclination angle of the furnace cover charging port to ensure that the baffle can cover part of the charging port vertically to prevent splashing.

[0031] This embodiment also provides a LF refining furnace cover, on which the above-mentioned furnace cover charging port splash prevention device is provided.

[0032] The splashing probability during the charging process of the utility model (the probability of slag flying out of the charging port each time charging) is reduced from 16% to 0.2%, which greatly reduces the safety risk of scalding of the charging workers.

[0033] In addition to the above embodiments, the present invention may also have other implementations. Any technical solution formed by equivalent replacement or equivalent transformation falls within the protection scope required by the present invention.

Claims

1. A furnace cover charging port splash prevention device, arranged at the charging port of the LF refining furnace cover, characterized in that: It comprises a baffle (1) and a guide plate (2), wherein the baffle (1) and the guide plate (2) are arranged at the charging port of the furnace cover, and the guide plate (2) is arranged on the outer side of the baffle (1); The upper end of the baffle (1) is movably connected to the highest point of the upper edge (3) of the furnace cover charging port, the baffle (1) is vertically arranged from top to bottom along the upper edge (3) of the furnace cover charging port, and the lower end of the baffle (1) is located at the lower edge (4) of the furnace cover charging port; The guide plate (2) comprises a support plate (21) and an inclined plate (22); one end of the support plate (21) extends outwardly in an inclined manner to form the inclined plate (22); an obtuse angle is formed between the inclined plate (22) and the support plate (21) in a clockwise direction; one end of the support plate (21) is arranged at the outer peripheral edge of the lower edge (4) of the furnace cover charging port; the support plate (21) is vertically arranged from bottom to top along the lower edge (4) of the furnace cover charging port; and the inclined plate (22) is extended from the other end of the support plate (21).

2. The splash-proof device for the furnace cover charging port according to claim 1, characterized in that: The baffle (1) is connected to the charging port of the furnace cover by means of a hook.

3. The splash prevention device for the furnace cover charging port according to claim 1, characterized in that: The furnace cover charging port of the LF refining furnace is a duckbill type structure, and the furnace cover charging port comprises an upper edge (3) of the furnace cover charging port and a lower edge (4) of the furnace cover charging port. The upper edge (3) of the furnace cover charging port is inclined, and the lower edge (4) of the furnace cover charging port is horizontally arranged. The angle formed by the upper edge (3) of the furnace cover charging port and the lower edge (4) of the furnace cover charging port in a clockwise direction is an acute angle.

4. The splash prevention device for the furnace cover charging port according to claim 1, characterized in that: The height of the guide plate (2) is 5-10 cm.

5. The splash prevention device for the furnace cover charging port according to claim 1, characterized in that: The baffle plate (1) and the guide plate (2) are both made of iron plates.

6. The splash prevention device for the furnace cover charging port according to claim 1, characterized in that: The obtuse angle formed between the inclined plate (22) and the support plate (21) is 90-140° clockwise.

7. A LF refining furnace cover, characterized in that: The furnace cover is provided with a furnace cover charging port splash prevention device as described in any one of claims 1-5.

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