A LF furnace charging device

Abstract

The utility model relates to a kind of LF furnace related technical field, especially a kind of LF furnace feeding device, including feeding column, the top of the feeding column is equipped with feeding hopper, the bottom of the feeding column is equipped with feeding valve;The outer lateral wall of the feeding column is installed with mounting seat;One side of the mounting seat is equipped with negative pressure component, the negative pressure component includes connecting pipe, is set to the inner lateral wall of the mounting seat, one end is connected with the gas outlet end of the feeding column;Suction head, fixedly connected to one end of the connecting pipe;Suction screen cover;By setting negative pressure component on the outer lateral wall of feeding column, in the process of feeding, negative pressure component extracts the gas in feeding column, so that feeding column is in negative pressure state, in the process of feeding, adsorb dust from source, prevent to escape, improve workshop air quality, meet environmental protection requirement, reduce occupational disease risk, in addition, the abrasion of reduced dust reducing valve and pipeline is reduced, the service life of equipment is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of LF furnaces, and in particular to an LF furnace feeding device. Background Technology

[0002] The LF (Ladle Furnace) is a refining equipment developed in Japan in the early 1970s. Due to its simple equipment, low investment cost, flexible operation, and good refining effect, it has become a rising star in the metallurgical industry and has been widely used and developed worldwide. As a highly efficient secondary refining method, the LF ladle furnace utilizes electric arc heating, reducing slag formation, and bottom-blown argon stirring to achieve rapid desulfurization, homogenize the composition and temperature of molten steel, and effectively remove inclusions, playing a significant role in the smelting of pure steel. The formation of reducing white slag in the initial stage of LF furnace smelting is its most important production step. In China, LF furnaces require the addition of slag-forming materials including lime (CaO), reducing agents, calcium carbide (CaC2), and aluminum granules (Al). Besides lime being transported from the silo to the ladle alloy hopper via belt conveyor, other bulk materials such as reducing agents, calcium carbide (CaC2), and aluminum granules (Al) must be added through the furnace door (200*200mm), which also serves as a temperature sampling point.

[0003] For example, Chinese utility model patent CN103451363B proposes a portable LF furnace, including a furnace body, which is a steel ladle with an air blowing device. The steel ladle is fixed on a steel ladle car. A water-cooled furnace cover is provided on the top of the furnace body. An alloy hopper and a main furnace door are provided on the side wall of the water-cooled furnace cover. A furnace cover is provided on the main furnace door. A portable feeding hopper is provided on the opposite side of the main furnace door. The bottom end of the portable feeding hopper is fixed to the water-cooled furnace cover. The portable feeding hopper is tilted upward at a 30° angle to the horizontal direction. The portable feeding hopper is in the shape of a long cylinder. The opening surface of the portable feeding hopper is larger than the cross-section of the whole body. A cover plate is provided on the opening surface of the portable feeding hopper.

[0004] In the existing technology, a feeding hopper is used to feed auxiliary materials such as reducing agents, calcium carbide (CaC2), and aluminum granules (Al). During the feeding process, the existing feeding device has the problem of dust emission. Dust can easily escape from the gaps in the feeding column into the workshop environment, resulting in the direct discharge of dust into the air and increasing the risk of dust accumulation inside the equipment. Utility Model Content

[0005] The purpose of this invention is to provide an LF furnace feeding device to solve the problems mentioned in the background art.

[0006] The technical solution adopted in this utility model is:

[0007] An LF furnace charging device includes a charging column, a charging hopper at the top of the charging column, and a charging valve at the bottom of the charging column;

[0008] A mounting base is installed on the outer wall of the feeding column;

[0009] A negative pressure assembly is provided on one side of the mounting base. The negative pressure assembly includes a connecting pipe disposed on the inner side wall of the mounting base, one end of which is connected to the air outlet of the feeding column; an air extraction head fixedly connected to one end of the connecting pipe; an air extraction screen disposed at one end of the air extraction head and located inside the feeding column; a negative pressure chamber fixedly connected to the other end of the connecting pipe; a sealing cap threadedly connected to one end of the negative pressure chamber; an air extraction pump installed inside the sealing cap; an air extraction pipe fixedly connected to the air extraction end of the air extraction pump; and filter cotton disposed inside the negative pressure chamber.

[0010] Optionally, the feeding column includes a column body; and a mounting hole is formed on the lower outer wall of the column body.

[0011] Optionally, the mounting base includes a base body, which is fixedly connected to the outer wall of the feeding column; and an internally threaded column, which is fixedly connected to one side of the base body and threadedly connected to the outer wall of the connecting pipe.

[0012] Optionally, the mounting base may further include a sealing ring, which is fixedly connected to the outer wall of the internally threaded post.

[0013] Optionally, the outer wall of the connecting pipe has external threads.

[0014] Optionally, the suction mesh can be quickly connected to the suction head via a plug-in connection.

[0015] Optionally, the filter cotton consists of a cotton core and a metal mesh frame.

[0016] Optionally, the negative pressure assembly also includes an air filter element disposed at the exhaust port of the air pump.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] By installing a negative pressure component on the outer wall of the feeding column, the component extracts the gas from the column during feeding, creating a negative pressure environment. This process adsorbs dust at the source, preventing it from escaping, improving workshop air quality, meeting environmental protection requirements, and reducing occupational disease risks. Furthermore, the reduced dust decreases wear on valves and pipes, extending the equipment's lifespan. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of this application;

[0021] Figure 2 This is a cross-sectional view of the feeding column in this application;

[0022] Figure 3 This is a cross-sectional view of the negative pressure component in this application;

[0023] Figure 4 This is a cross-sectional view of the mounting base in this application.

[0024] Figure label:

[0025] 10. Feeding column; 11. Column body; 12. Mounting hole;

[0026] 20. Feeding hopper;

[0027] 30. Feeding valve;

[0028] 40. Mounting base; 41. Base body; 42. Internally threaded post; 43. Sealing ring;

[0029] 50. Negative pressure assembly; 51. Connecting pipe; 52. Air extraction head; 53. Air extraction mesh cover; 54. Negative pressure chamber; 55. Sealing cover; 56. Air extraction pump; 57. Air extraction pipe; 58. Filter cotton; 59. Air filter element. Detailed Implementation

[0030] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0031] Given that the existing technology uses a feeding hopper to feed auxiliary materials such as reducing agents, calcium carbide (CaC2), and aluminum granules (Al), there is a problem of dust emission during the feeding process. Dust can easily escape from the gaps in the feeding column into the workshop environment, causing dust to be directly discharged into the air and increasing the risk of dust accumulation inside the equipment.

[0032] like Figure 1-4 As shown, this utility model embodiment provides an LF furnace charging device, including: a charging column 10, the charging column 10 including a column body 11; a mounting hole 12, which is opened on the lower outer wall of the column body 11; a charging hopper 20 is provided at the top of the charging column 10; and a charging valve 30 is provided at the bottom of the charging column 10.

[0033] The feeding valve 30 is connected to the auxiliary material inlet port of the furnace body. When feeding, auxiliary materials such as reducing agent, calcium carbide (CaC2), and aluminum granules (Al) enter the column 11 through the feeding hopper 20. Then, by opening the feeding valve 30, the auxiliary materials such as reducing agent, calcium carbide (CaC2), and aluminum granules (Al) fall into the furnace body.

[0034] A mounting base 40 is installed on the outer side wall of the feeding column 10. The mounting base 40 includes a base body 41, which is fixedly connected to the outer side wall of the feeding column 10; and an internally threaded column 42, which is fixedly connected to one side of the base body 41 and threadedly connected to the outer side wall of the connecting pipe 51.

[0035] The base 41 is installed on the mounting hole 12 at the lower end of the outer side wall of the column 11 by welding. The connecting pipe 51 is fixed to the outer side wall of the column 11 by the internal threaded column 42, which facilitates disassembly and installation.

[0036] A negative pressure assembly 50 is provided on one side of the mounting base 40. The negative pressure assembly 50 includes a connecting pipe 51, which is disposed on the inner side wall of the mounting base 40 and one end is connected to the air outlet of the feeding column 10; an air extraction head 52, which is fixedly connected to one end of the connecting pipe 51; an air extraction screen 53, which is disposed at one end of the air extraction head 52 and located inside the feeding column 10; a negative pressure chamber 54, which is fixedly connected to the other end of the connecting pipe 51; a sealing cover 55, which is threadedly connected to one end of the negative pressure chamber 54; an air extraction pump 56, which is installed inside the sealing cover 55; an air extraction pipe 57, which is fixedly connected to the air extraction end of the air extraction pump 56; and a filter cotton 58, which is disposed inside the negative pressure chamber 54.

[0037] The negative pressure chamber 54 is threadedly connected to the mounting base 40 via a connecting pipe 51. During use, the main body of the negative pressure assembly 50 is mounted on the column 11 via the connecting pipe 51, so that the suction head 52 is located inside the column 11 (the optimal installation scheme for the suction head 52 is that its outermost end face is flush with the inner wall of the column 11, ensuring that it does not collide with the suction head 52 during feeding). During suction (suction is performed simultaneously with feeding), the suction pump 56 is activated, causing it to extract the gas from the negative pressure chamber 54 through the suction pipe 57, thus reducing the pressure in the negative pressure chamber 54. Under negative pressure, the negative pressure chamber 54 extracts the gas from the column 11 through the suction head 52 at one end of the connecting pipe 51, thus achieving a negative pressure state in the column 11. The suction screen 53 blocks and filters large particles of auxiliary materials to prevent the added auxiliary materials from being drawn into the negative pressure chamber 54. The negative pressure chamber 54 is equipped with filter cotton 58. The outside of the filter cotton 58 is connected to the suction pipe 57, and the inside is connected to the connecting pipe 51, so that the filter cotton collects and blocks the sucked-in dust. Finally, after the material is added, the negative pressure assembly 50 can be completely removed, and the suction screen 53 and filter cotton 58 can be cleaned or replaced.

[0038] Furthermore, the mounting base 40 also includes a sealing ring 43, which is fixedly connected to the outer wall of the internally threaded post 42.

[0039] By setting the sealing ring 43, the sealing performance of the negative pressure assembly 50 is improved.

[0040] Furthermore, the outer wall of the connecting pipe 51 has external threads.

[0041] By setting external threads, the connecting pipe 51 is fixed to the outer wall of the column 11 by the internal threaded post 42, which facilitates disassembly and installation.

[0042] Furthermore, the suction screen 53 is quickly connected to the suction head 52 via a plug-in connection.

[0043] The exhaust mesh cover 53 can be quickly replaced via a plug-in connection.

[0044] Furthermore, the filter cotton 58 consists of a cotton core and a metal mesh frame.

[0045] The metal mesh frame supports the cotton core, making the filter cotton 58 form a stable cylindrical body, which can prevent the filter cotton 58 from deforming under negative pressure and affecting the filtration effect.

[0046] Furthermore, the negative pressure assembly 50 also includes an air filter 59, which is located at the exhaust port of the air pump 56.

[0047] By incorporating air filter 59, the exhaust gas is further filtered, thereby improving the emission performance.

[0048] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A charging device for an LF furnace, comprising: A feeding column, wherein a feeding hopper is provided at the top end of the feeding column and a feeding valve is provided at the bottom end of the feeding column, characterized in that: A mounting base is installed on the outer wall of the feeding column; A negative pressure assembly is provided on one side of the mounting base, the negative pressure assembly comprising: A connecting pipe is disposed on the inner side wall of the mounting base, with one end connected to the air outlet of the feeding column; An air extraction head is fixedly connected to one end of the connecting pipe; An air extraction screen is provided at one end of the air extraction head and located inside the feeding column; The negative pressure chamber is fixedly connected to the other end of the connecting pipe; A sealing cap, threadedly connected to one end of the negative pressure chamber; An air pump is installed inside the sealing cover; The air extraction pipe is fixedly connected to the air extraction end of the air pump; Filter cotton is placed inside the negative pressure chamber.

2. The LF furnace feeding device according to claim 1, characterized in that, The feeding column includes: Column; The mounting hole is located on the lower outer wall of the column.

3. The LF furnace charging device according to claim 1, characterized in that the mounting base... include: The base is fixedly connected to the outer wall of the feeding column; An internally threaded post is fixedly connected to one side of the base body and threadedly connected to the outer wall of the connecting pipe.

4. The LF furnace charging device according to claim 3, characterized in that, The mounting base also includes: A sealing ring is fixedly connected to the outer wall of the internally threaded column.

5. The LF furnace charging device according to claim 1, characterized in that, The outer wall of the connecting pipe has external threads.

6. The LF furnace charging device according to claim 1, characterized in that, The suction mesh cover is quickly connected to the suction head via a plug-in connection.

7. The LF furnace charging device according to claim 1, characterized in that, The filter cotton consists of a cotton core and a metal mesh frame.

8. The LF furnace charging device according to claim 1, characterized in that, The negative pressure component also includes: An air filter element is located at the exhaust port of the air pump.

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