An electric slag furnace feeding module

Abstract

This utility model relates to an electroslag furnace feeding module, including an electroslag furnace. The feed inlet of the electroslag furnace is located at the top center. A hopper is fixedly installed at the feed inlet of the electroslag furnace. The hopper is equipped with water-cooling pipes inside. The top diameter of the hopper is larger than the bottom diameter of the hopper. The bottom of the hopper is coaxial with the feed inlet. A cover plate is detachably installed on the inner top of the hopper. A through-hole is provided at the top center of the cover plate. The through-hole is fitted with the feed bar with a clearance. The periphery of the cover plate is attached to the inner wall of the hopper. An insulating heat strip is bonded and fixed to the periphery of the cover plate. The insulating heat strip is composed of stacked porous silicon heat insulation films. A mounting hole with internal and external communication is provided at the bottom of the hopper. A nozzle is fixedly installed in the mounting hole. One end of the nozzle located on the outside of the hopper is connected to a flexible hose. The hose is covered with a high-temperature resistant insulating layer. The hose and nozzle work together to input argon gas into the inner bottom of the hopper and prevent air from entering.

Description

Technical Field

[0001] This utility model relates to the field of metal smelting technology, and in particular to an electroslag furnace charging module. Background Technology

[0002] The upper part of the protective atmosphere electroslag furnace crystallizer adopts a closed structure for smelting high-quality special steel. This closed structure is achieved using upper and lower fume hoods. The lower fume hood is hoisted onto the crystallizer by a crane. The hood body is a component of the furnace base and has a lifting function, lowering itself onto the lower fume hood during smelting. Due to the high temperature in the upper part of the crystallizer, both the upper and lower fume hoods are water-cooled components: an inner and outer wall combination forming a water cavity with water cooling in the middle. Dust removal pipes are installed on the fume hood body to remove slag dust. These pipes penetrate both the inner and outer walls of the fume hood body, entering the water cavity. During use, cracks frequently appear in the circumferential welds between the dust removal pipes and the inner wall of the fume hood body, leading to water leakage. This leakage water, radiated by high temperature, forms steam that mixes with argon gas, severely damaging the protective atmosphere smelting environment, failing to meet smelting process requirements, and affecting the quality of the steel ingots. Furthermore, it poses a significant safety hazard; if a large amount of leakage occurs, it could flow directly into the slag pool, potentially causing a physical explosion.

[0003] Currently, Chinese patent CN222715430U discloses a protective atmosphere electroslag furnace water-cooled dustproof fume hood body device, relating to the field of metallurgical equipment technology. To solve the problems of easy leakage and poor dustproof effect of the fume hood body, the patent includes a fume hood body with a hollow structure having inner and outer walls in the circumferential direction. The fume hood body has an exhaust pipe communicating with the inner cavity of the fume hood body. The top plate of the fume hood body has mounting holes. A copper rod is positioned in the mounting holes and is movable along the X, Y, and Z directions of the fume hood body. The mounting holes allow for free movement of the copper rod. A water-proof structure is welded between the inner and outer walls and located circumferentially around the exhaust pipe, effectively preventing water leakage. A dustproof structure is located at the upper end of the top plate and is a flexible structure. During the movement of the copper rod, the dustproof structure always seals the gap between the copper rod and the wall of the mounting hole. A limiting structure is located above the dustproof structure with a gap between it and the limiting structure. This patent solves the technical problems.

[0004] The above-mentioned existing technical solutions have the following drawbacks: the structure is too complex and the stability is not high. Because there is a high temperature at the feed inlet, the stability of the structure is not high and it is prone to thermal deformation. Utility Model Content

[0005] The purpose of this invention is to provide an electroslag furnace feeding module to solve the problems existing in the prior art.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0007] An electroslag furnace feeding module includes an electroslag furnace with a feed inlet located at the top center. A hopper is fixedly installed at the feed inlet, and the hopper has a water-cooling pipeline inside. The top diameter of the hopper is larger than the bottom diameter, and the bottom of the hopper is coaxial with the feed inlet. A cover plate is detachably installed on the inner top of the hopper. A through-hole is provided at the top center of the cover plate, and the through-hole is clearance-fitted with a feed bar. The periphery of the cover plate is attached to the inner wall of the hopper, and a heat insulation strip is bonded and fixed to the periphery of the cover plate. The heat insulation strip is composed of stacked porous silicon heat insulation films. The bottom of the hopper has an internally and externally communicating mounting hole, and a nozzle is fixedly installed in the mounting hole. One end of the nozzle located on the outside of the hopper is connected to a flexible hose, and the hose is covered with a high-temperature resistant heat insulation layer.

[0008] By adopting the above technical solution, the insulating heat strip is composed of a heat-insulating film wrapped around it. The purpose of the insulating heat strip is to transform the rigid fit between the periphery of the cover plate and the inner wall of the hopper into a flexible fit. This effectively prevents air from seeping into the inner bottom of the hopper through the gap between the cover plate and the inner wall of the hopper. Because the inner bottom of the hopper is connected to the feed inlet, air can enter the interior of the electroslag remelting furnace and affect its operation. The flexible hose is used in conjunction with the nozzle to introduce argon gas into the inner bottom of the hopper, preventing air from entering the inner bottom of the hopper through the gap between the material bar and the clearance hole. The electroslag remelting furnace uses the protective method of isolating the molten slag from air for refining. This device is used in electric furnaces for certain steels or alloys. However, to facilitate better feeding, the feed inlet cannot be completely sealed. Therefore, this device continuously injects argon gas above the feed inlet, causing the argon to displace air and prevent it from entering the feed inlet. Compared to complex mechanical structures, this device is simpler and more reliable. Simply opening the argon gas cylinder indicates that the protection device is working. Unlike complex mechanical structures where failure to function cannot be detected promptly, this device indicates failure as soon as the argon gas cylinder runs out, making it easier to control and more intuitive to detect.

[0009] In a further embodiment, the end of the hose that is not connected to the nozzle has two branches, and each branch is fixedly fitted with a pipe fitting.

[0010] By adopting the above technical solution, since the electroslag furnace cannot be suddenly stopped during operation, two connectors need to be set at the other end in order to maintain the supply of argon gas. This way, when one gas cylinder is empty, the other gas cylinder can be opened. Therefore, one-way gas valves need to be set in the middle section of the branch.

[0011] In a further embodiment, a heat-insulating layer covering the nozzle is provided between the connection between the nozzle and the hopper.

[0012] Although the hopper is equipped with a water-cooling channel, a certain amount of heat insulation is still required to extend the service life of the nozzle. This is because argon gas flows inside the nozzle, and the temperature of the argon gas is significantly lower than that of the outer shell. Therefore, heat insulation measures are necessary when required.

[0013] In a further embodiment, one end of a red ribbon is fixedly mounted on the top of the cover plate.

[0014] By adopting the above technical solution, if gas enters the hopper and overflows from the top of the cover plate, it will cause the red ribbon to shake, and the other end of the red ribbon will fly upwards. This allows for a direct observation of whether the argon gas is protecting the material.

[0015] In a further embodiment, the front, rear, left, and right sides of the cover plate are all inclined surfaces that cooperate with the inner wall of the hopper.

[0016] In summary, this utility model has the following beneficial effects:

[0017] 1. The system uses a hose and nozzle to continuously inject argon gas into the bottom of the hopper, thus preventing air from entering the feed inlet by displacing it. Compared to complex mechanical structures, this system is simpler and more reliable. Simply opening the argon gas cylinder indicates that the protection device is working. Unlike complex mechanical structures where failures cannot be detected promptly, this system indicates failure as soon as the argon gas cylinder runs out, making it easier to control and more intuitive to detect. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a structural schematic diagram illustrating the hopper and cover plate of this utility model.

[0020] In the diagram, 1 is the hopper; 2 is the cover plate; 3 is the insulating heat pipe; and 4 is the nozzle. Detailed Implementation

[0021] The present invention will be further described in detail below with reference to the accompanying drawings.

[0022] Identical parts are indicated by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "upper," and "lower" used in the following description refer to the attached figures. Figure 1In this specification, the terms "bottom surface" and "top surface," "inner" and "outer" refer to the direction toward or away from the geometry of a specific component. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this specification, "a plurality of" means two or more, unless otherwise explicitly and specifically defined by the direction of the center.

[0023] Example 1:

[0024] like Figures 1-2 As shown, an electroslag furnace feeding module includes an electroslag furnace. The feed inlet of the electroslag furnace is located at the top center. A hopper 1 is fixedly installed at the feed inlet of the electroslag furnace. Water cooling pipes are installed inside the hopper 1. The top diameter of the hopper 1 is larger than the bottom diameter of the hopper 1. The bottom of the hopper 1 is coaxial with the feed inlet. A cover plate 2 is detachably installed on the inner top of the hopper 1. A through-hole is provided at the top center of the cover plate 2. The through-hole is fitted with a material bar. The periphery of the cover plate 2 is attached to the inner wall of the hopper 1. An insulating heat strip 3 is bonded and fixed to the periphery of the cover plate 2. The insulating heat strip 3 has multiple holes. The hopper 1 is composed of stacked silicon heat insulation films. The bottom of the hopper 1 is provided with an internal and external connecting mounting hole. A nozzle 4 is fixedly installed in the mounting hole. The end of the nozzle 4 located on the outside of the hopper 1 is connected to a flexible hose. The outside of the flexible hose is covered with a high-temperature resistant heat insulation layer. The end of the flexible hose that is not connected to the nozzle 4 is provided with two branches. Each branch is fixedly installed with a pipe connector. A heat insulation layer covering the nozzle 4 is provided between the connection between the nozzle 4 and the hopper 1. One end of a red ribbon is fixedly installed on the top of the cover plate 2. The front, back, left and right sides of the cover plate 2 are all inclined surfaces that cooperate with the inner wall of the hopper 1.

[0025] Specific implementation process: The insulating tape is made by wrapping an insulating film around the hopper. Its purpose is to transform the rigid fit between the cover plate and the inner wall of the hopper into a flexible fit. This effectively prevents air from seeping into the inner bottom of the hopper through the gap between the cover plate and the inner wall. Because the inner bottom of the hopper is connected to the feed inlet, air entering the electroslag remelting furnace can affect its operation. The flexible hose works in conjunction with the nozzle to introduce argon gas into the inner bottom of the hopper, preventing air from entering through the gap between the material bar and the clearance hole. The electroslag remelting furnace utilizes this air-isolation protection method to refine certain materials. This is an electric furnace device for steel or alloys. However, to facilitate better feeding, the feed inlet cannot be completely sealed. Therefore, this device continuously injects argon gas above the feed inlet, causing the argon gas to displace air and prevent air from entering the feed inlet. Compared to complex mechanical structures, this device is simpler and more reliable. Simply opening the argon gas storage cylinder is enough to know that the protection device has started working. Compared to complex mechanical structures, it is difficult to detect failures in a timely manner. However, with this device, as soon as the argon gas storage cylinder is empty, it is known that the device has failed, making it easier to control and more intuitive to detect.

[0026] In the embodiments disclosed in this utility model, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments disclosed in this utility model according to the specific circumstances.

[0027] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

Claims

1. An ESR furnace loading module comprising an ESR furnace, the feed inlet of the ESR furnace is located at the top center position, characterized in that: A hopper (1) is fixedly installed at the feed inlet of the electroslag furnace. A water-cooled pipe is installed inside the hopper (1). The top diameter of the hopper (1) is larger than the bottom diameter of the hopper (1). The bottom of the hopper (1) is coaxial with the feed inlet. A cover plate (2) is detachably installed at the top inner end of the hopper (1). A through-hole is provided at the center of the top of the cover plate (2). The through-hole is fitted with the material bar. The periphery of the cover plate (2) is attached to the inner wall of the hopper (1). An insulating heat strip (3) is bonded and fixed to the periphery of the cover plate (2). The insulating heat strip (3) is composed of a porous silicon heat insulation film. A mounting hole with internal and external communication is provided at the bottom of the hopper (1). A nozzle (4) is fixedly installed in the mounting hole. The end of the nozzle (4) located outside the hopper (1) is connected to a hose. The hose is covered with a high-temperature resistant heat insulation layer.

2. The feeding module of electroslag furnace according to claim 1, characterized in that: The end of the hose that is not connected to the nozzle (4) has two branches, and each branch is fixedly installed with a pipe connector.

3. The feeding module of the electro-shock furnace according to claim 1, characterized in that: A heat insulation layer covering the nozzle (4) is provided between the connection between the nozzle (4) and the hopper (1).

4. The feeding module of electroslag furnace according to claim 1, characterized in that: One end of a red ribbon is fixedly installed on the top of the cover plate (2).

5. The feeding module of the electro-shock furnace according to claim 1, characterized in that: The front, rear, left and right sides of the cover plate (2) are all inclined surfaces that fit with the inner wall of the hopper (1).

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