A slag adding device for electroslag remelting furnace

Abstract

This utility model relates to the technical field of slag feeding devices, specifically a slag feeding device for an electroslag remelting furnace. The slag feeding device includes: a screening device, a metering and conveying device, and a movable lifting device; the movable lifting device includes a support frame, a lifting assembly, and a lifting platform; the lifting assembly is connected to the support frame and the lifting platform respectively; the screening device and the metering and conveying device are mounted on the lifting platform; the screening device includes a three-layer vibrating screen; the middle layer of the three-layer vibrating screen has a slag discharge channel connected and communicated to its side wall; the metering and conveying device includes a screw meter; the inlet of the screw meter is connected and communicated to the discharge channel, and the outlet of the screw meter is communicated to the furnace opening of the electroslag remelting furnace. This slag feeding device for an electroslag remelting furnace integrates slag screening, slag metering, and conveying functions, and can adjust the height and distance of the slag outlet relative to the furnace opening according to the actual conditions of the electroslag remelting furnace to adapt to different slag feeding requirements.

Description

Technical Field

[0001] This utility model relates to the technical field of slag feeding devices, and more specifically, to a slag feeding device for an electroslag remelting furnace. Background Technology

[0002] An electroslag remelting furnace is a core piece of equipment that uses electric current to generate resistance heat through molten slag to achieve secondary refining of metals. It is widely used in aerospace, nuclear power, and high-end mold steel industries. Its working principle involves immersing consumable electrodes in a molten slag pool, using Joule heating to melt the electrode tips, and then refining the molten metal droplets in the slag pool before directionally solidifying them in a water-cooled copper crystallizer, ultimately obtaining high-purity, low-segregation high-quality steel ingots.

[0003] The slag addition process plays a crucial role in the operation of an electroslag remelting furnace, directly impacting the final quality of the metallic materials. Appropriate slag effectively removes impurities such as sulfur and phosphorus from the molten metal, improving its purity and microstructure. Simultaneously, by adjusting the slag composition and dosage, the melting point, viscosity, and conductivity of the slag can be controlled, ensuring the stable operation of the electroslag remelting process and consequently guaranteeing the solidification quality and surface finish of the steel ingots. In short, the precision and efficiency of slag addition are key factors determining the success or failure of the electroslag remelting process and influencing whether high-end metallic materials meet applicable standards.

[0004] However, current slag feeding technology for electroslag remelting furnaces has many shortcomings. For example, in terms of slag particle size screening, traditional screening equipment has low screening efficiency and cannot meet the needs of multi-stage screening. The slag particle size distribution is wide, and existing equipment cannot accurately screen particles within the commonly used particle size range for electroslag remelting. Insufficient screening efficiency results in a large number of unqualified particles entering the slag pool, affecting the refining effect. Furthermore, existing slag feeding devices have poor compatibility with the furnace opening, making it difficult to flexibly adjust their height and distance from the furnace opening. During slag feeding, precise positioning based on actual production conditions is impossible, which not only affects slag feeding efficiency but may also cause slag spillage and uneven distribution, leading to an imbalance in molten slag composition and affecting the quality of electroslag remelted products. In addition, in existing technologies, slag screening, metering, and transportation are all completed through repeated dumping using different equipment. Throughout this process, the slag is susceptible to contamination and spillage.

[0005] Therefore, the above-mentioned problems urgently need to be solved through innovative technologies in order to improve the quality and efficiency of electroslag remelting production. Utility Model Content

[0006] The purpose of this utility model is to provide a slag feeding device for an electroslag remelting furnace. This slag feeding device can integrate slag screening, slag metering and transportation functions, and can adjust the height and distance of the slag outlet relative to the furnace opening according to the actual situation of the electroslag remelting furnace to meet the slag feeding requirements under different conditions.

[0007] To achieve the above objectives, the preferred solution adopted by this utility model is:

[0008] A slag feeding device for an electroslag remelting furnace includes: a screening device, a metering and conveying device, and a movable lifting device; the movable lifting device includes a support frame, a lifting assembly, and a lifting platform; the lifting assembly is connected to the support frame and the lifting platform respectively; the lifting platform can be close to or away from the support frame; the screening device and the metering and conveying device are arranged on the lifting platform; the screening device includes a three-layer vibrating screen; the middle layer of the three-layer vibrating screen has a slag discharge channel connected and communicated to its side wall; the metering and conveying device includes a screw meter; the inlet of the screw meter is connected and communicated to the discharge channel, and the outlet of the screw meter is communicated to the furnace opening of the electroslag remelting furnace.

[0009] Furthermore, in a preferred embodiment of this utility model, it further includes: a sealing connection assembly; the sealing connection assembly includes a first connection channel, a second connection channel, a first flange, a second flange, and a sealing gasket; one end of the first connection channel is connected to and communicates with the slag discharge channel, and the other end is connected to the first flange; one end of the second connection channel is connected to and communicates with the feed inlet, and the other end is connected to the second flange; the sealing gasket is disposed between the first flange and the second flange; the first flange and the second flange are detachably connected.

[0010] Furthermore, in a preferred embodiment of this utility model, the screening device further includes: the upper sidewall of the three-layer vibrating screen is connected to and communicates with a first discharge channel, the lower sidewall of the three-layer vibrating screen is connected to and communicates with a second discharge channel, the first discharge channel is provided with a first switching valve, the second discharge channel is provided with a second switching valve, and the slag discharge channel is provided with a third switching valve.

[0011] Furthermore, in a preferred embodiment of this utility model, the lifting assembly includes multiple cylinders; the housing of the cylinder is connected to the support frame, and the telescopic end of the cylinder is connected to the lifting platform.

[0012] Furthermore, in a preferred embodiment of this utility model, the metering and transport device further includes a material guiding channel; one end of the material guiding channel is connected to and communicates with the discharge port, and the other end is connected to the furnace opening; the axis of the material guiding channel forms an acute or obtuse angle with the length direction of the screw meter.

[0013] Furthermore, in a preferred embodiment of this utility model, the bottom of the support frame is provided with multiple omnidirectional brake wheels.

[0014] Furthermore, in a preferred embodiment of the present invention, the support frame is connected to a pusher for moving it.

[0015] Furthermore, in a preferred embodiment of this utility model, the movable lifting device further includes a trolley, and a support frame is disposed on the trolley.

[0016] The beneficial effects of the slag feeding device for an electroslag remelting furnace provided by this utility model are:

[0017] The slag feeding device for an electroslag remelting furnace provided by this utility model includes a screening device, a metering and conveying device, a sealing connection assembly, and a movable lifting device. Based on the structural design of the screening device, the metering and conveying device, and the design of their interconnections, the resulting slag feeding device for an electroslag remelting furnace can achieve the following:

[0018] (1) The slag feeding device for the electroslag remelting furnace can integrate slag screening, slag metering and transportation functions, and can adjust the height and distance of the slag outlet relative to the furnace opening according to the actual situation of the electroslag remelting furnace to meet the slag feeding requirements under different conditions.

[0019] (2) The slag discharge channel of the screening device and the feed inlet of the metering and transportation device are connected by a sealing connection component, which can maintain the continuity of slag transportation between the two devices, avoid dust and spillage of slag, and also reduce external pollution of slag.

[0020] (3) The setting of the feeding channel can quickly guide the slag into the furnace, and on the other hand, it can prevent the screw metering device from being too close to the furnace opening, especially when feeding is carried out during the consumption of the self-consumable electrode, so as to avoid high temperature damage to the screw metering device. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 A partial structural schematic diagram of the slag feeding device for an electroslag remelting furnace provided in an embodiment of this utility model, in its first operating state;

[0023] Figure 2 A partial structural schematic diagram of the slag feeding device for an electroslag remelting furnace provided in an embodiment of this utility model, in its second operating state;

[0024] Icons: 10-Slag feeding device for electroslag remelting furnace, 20-Electroslag remelting furnace, 100-Screwing device, 200-Metering and conveying device, 300-Sealing connection assembly, 400-Movable lifting device, 410-Support frame, 420-Lifting assembly, 430-Lifting platform, 440-Universal brake wheel, 450-Push handle, 110-Three-layer vibrating screen, 111-Slag discharge channel, 112-First discharge channel, 113-First discharge channel, 210-Screw metering device, 220-Guide channel, 21-Furnace opening, 310-First connecting channel, 320-Second connecting channel, 330-First flange, 340-Second flange. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0027] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0028] Example 1

[0029] The following is in conjunction with the appendix Figure 1-2 The present invention will be further described as follows:

[0030] This utility model provides a slag feeding device 10 for an electroslag remelting furnace. Please refer to [link / reference]. Figure 1-2 The slag feeding device 10 for the electroslag remelting furnace includes a screening device 100, a metering and conveying device 200, a sealing connection assembly 300, and a movable lifting device 400.

[0031] The movable lifting device 400 includes a support frame 410, a lifting assembly 420, and a lifting platform 430. The lifting assembly 420 is connected to both the support frame 410 and the lifting platform 430. In this embodiment, the lifting assembly 420 includes multiple cylinders. The cylinder housings are connected to the support frame 410, and the telescopic ends of the cylinders are connected to the lifting platform 430. In other embodiments, the lifting assembly 420 may also employ a scissor-type lifting structure as used in the prior art, enabling the lifting platform 430 to move closer to or further away from the support frame 410 for lifting functionality.

[0032] In this embodiment, the bottom of the support frame 410 is provided with multiple universal brake wheels 440. Any model of universal brake wheel 440 that is compatible with existing technology can be used. To facilitate the operation of the movable lifting device 400, the support frame 410 is connected to a pusher 450 for moving it. The structural design of the support frame 410 portion of the movable lifting device 400 is suitable for small and medium-sized electroslag remelting furnaces 20. If it is a large electroslag remelting furnace 20, the movable lifting device 400 may also include a trolley (not shown), and the support frame 410 can be mounted on the trolley to achieve movement.

[0033] In this embodiment, both the screening device 100 and the metering and transporting device 200 are mounted on the lifting platform 430.

[0034] The screening device 100 includes a three-layer vibrating screen 110. The middle layer of the three-layer vibrating screen 110 is connected to and communicates with a slag discharge channel 111, the upper layer of the three-layer vibrating screen 110 is connected to and communicates with a first discharge channel 112, and the lower layer of the three-layer vibrating screen 110 is connected to and communicates with a second discharge channel 113. The first discharge channel 112 is equipped with a first switching valve (not shown), the second discharge channel 113 is equipped with a second switching valve (not shown), and the slag discharge channel 111 is equipped with a third switching valve (not shown).

[0035] After screening, the first, second, and third switching valves can be opened to discharge the material respectively. The three-layer vibrating screen 110 can be any existing model compatible with other equipment in this embodiment. The selection of the two screen layers of the three-layer vibrating screen 110 can be adjusted according to the required slag particle size of the electroslag remelting furnace 20.

[0036] In this embodiment, the metering and conveying device 200 includes a screw meter 210 and a material guide channel 220. The screw meter 210 can be any existing screw meter model that is compatible with other devices in this embodiment.

[0037] The feed inlet of the screw meter 210 is connected to the discharge channel. One end of the guide channel 220 is connected to the discharge inlet of the screw meter 210, and the other end is connected to the furnace opening 21. The axis of the guide channel 220 forms an acute or obtuse angle with the length direction of the screw meter 210.

[0038] In this embodiment, the sealing connection assembly 300 includes a first connection channel 310, a second connection channel 320, a first flange 330, a second flange 340, and a sealing gasket (not shown). One end of the first connection channel 310 is connected to and communicates with the slag discharge channel 111, and the other end is connected to the first flange 330. One end of the second connection channel 320 is connected to and communicates with the feed inlet, and the other end is connected to the second flange 340. The sealing gasket is disposed between the first flange 330 and the second flange 340, and the first flange 330 and the second flange 340 are detachably connected.

[0039] The slag feeding device 10 for the electroslag remelting furnace provided in this embodiment works as follows: the moving position and lifting height of the movable lifting device 400 are adjusted according to the actual model of the electroslag remelting furnace 20 so that the connecting end of the material guiding channel 220 and the furnace opening 21 can be adapted to the furnace opening 21.

[0040] The crushed material is added to the feed inlet of the three-layer vibrating screen 110. The three-layer vibrating screen 110 is turned on to vibrate. After a certain period of time, it is stopped. The first switch valve, the second switch valve and the third switch valve are turned on to discharge the material. The slag that meets the particle size requirements enters the feed inlet of the screw meter 210 from the slag discharge channel 111 through the first connecting channel 310 and then the second connecting channel 320. The screw meter 210 conveys the slag to the discharge port according to the preset amount. The slag enters the guide channel 220 and then enters the furnace body.

[0041] In summary, the slag feeding device 10 for electroslag remelting furnace provided in this embodiment can integrate slag screening, slag metering and transportation functions, and can adjust the height and distance of the slag outlet relative to the furnace opening 21 according to the actual situation of the electroslag remelting furnace 20, so as to adapt to the slag feeding requirements under different conditions.

[0042] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A slag feeding device for an electroslag remelting furnace, characterized in that, include: Screening devices, metering and conveying devices, and mobile lifting devices; The movable lifting device includes a support frame, a lifting assembly, and a lifting platform; the lifting assembly is connected to the support frame and the lifting platform respectively; the lifting platform can be close to or far from the support frame. The screening device and the metering and transporting device are installed on the lifting platform; The screening device includes a three-layer rotary vibrating screen; the middle layer of the three-layer rotary vibrating screen is connected and communicates with a slag discharge channel on its side wall. The metering and transport device includes a screw meter; the feed inlet of the screw meter is connected to and communicates with the discharge channel, and the discharge outlet of the screw meter is connected to the furnace opening of the electroslag remelting furnace.

2. The slag feeding device for an electroslag remelting furnace according to claim 1, characterized in that, Also includes: A sealing connection assembly; the sealing connection assembly includes a first connection channel, a second connection channel, a first flange, a second flange, and a sealing gasket; One end of the first connecting channel is connected to and communicates with the slag discharge channel, and the other end is connected to the first flange; one end of the second connecting channel is connected to and communicates with the feed inlet, and the other end is connected to the second flange; the sealing gasket is disposed between the first flange and the second flange; the first flange and the second flange are detachably connected.

3. The slag feeding device for an electroslag remelting furnace according to claim 1, characterized in that, The screening device further includes: the upper side wall of the three-layer vibrating screen is connected to and communicates with a first discharge channel, the lower side wall of the three-layer vibrating screen is connected to and communicates with a second discharge channel, the first discharge channel is equipped with a first switching valve, the second discharge channel is equipped with a second switching valve, and the slag discharge channel is equipped with a third switching valve.

4. The slag feeding device for an electroslag remelting furnace according to claim 1, characterized in that, The lifting assembly includes multiple cylinders; the housing of each cylinder is connected to the support frame, and the telescopic end of each cylinder is connected to the lifting platform.

5. The slag feeding device for an electroslag remelting furnace according to claim 1, characterized in that, The metering and transport device also includes a material guiding channel; one end of the material guiding channel is connected to and communicates with the discharge port, and the other end is connected to the furnace opening; the axis of the material guiding channel forms an acute or obtuse angle with the length direction of the screw meter.

6. The slag feeding device for an electroslag remelting furnace according to claim 1, characterized in that, The bottom of the support frame is equipped with multiple omnidirectional brake wheels.

7. The slag feeding device for an electroslag remelting furnace according to claim 6, characterized in that, The support frame is connected to a pusher for moving it.

8. The slag feeding device for an electroslag remelting furnace according to claim 1, characterized in that, The movable lifting device also includes a trolley, and the support frame is mounted on the trolley.

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