Dust removal device for VD (vacuum degassing) refining furnace

Abstract

The utility model belongs to the technical field of dust removal, and particularly relates to a dust removal device for a VD (vacuum degassing) refining furnace. A dust removal plate is arranged above a refining furnace body, dust removal covers are downwards arranged on the two sides of the dust removal plate in the vertical direction, sliding rails are arranged on the two sides of the refining furnace body, supporting frames are connected to the sliding rails in a sliding mode, and the dust removal covers are arranged on the supporting frames capable of ascending and descending. The dedusting covers are arranged on the two sides of the VD furnace, so that the flue gas absorption effect is improved; and the supporting frame can be lifted up and down through driving of the lifting piece, so that the distance between the lifting plate and the VD furnace is conveniently adjusted, and the dust removal effect can be further enhanced. The telescopic spring is arranged between the ejector block and the lifting seat, the ejector block is flush with the sliding rail under general conditions, when the roller slides to the position above the ejector block, the spring shrinks under the action of gravity, and the roller slides down into the lifting groove, so that the device can be limited; a telescopic rod is arranged in the middle of the telescopic spring to control the sliding direction of the ejector block, and the ejector block is prevented from shifting.

Description

Technical Field

[0001] The utility model belongs to the technical field of dust removal, and in particular relates to a dust removal device for a VD refining furnace. Background Art

[0002] When metallurgical enterprises smelt high-end steel grades or require vacuum treatment of steel grades, they need to use vacuum treatment devices. Vacuum devices include VD vacuum refining furnaces, RH vacuum refining furnaces, etc. Vacuum treatment technology can simultaneously perform dehydrogenation, denitrification, decarbonization, deoxidation and desulfurization. In the case of a completely inert atmosphere, high-intensity bottom blowing and stirring can well remove non-metallic inclusions in molten steel. Steelmaking VD refining technology is a process that uses a VD furnace (i.e.: VD refining furnace) to refine molten steel by vacuuming. Its working process generally includes opening the vacuum tank cover to hoist the ladle, connecting the argon blowing device to blow argon, measuring temperature and taking samples, covering the vacuum tank cover and vacuuming for treatment (the one with oxygen blowing device is called VOD refining furnace, which is mostly used for stainless steel smelting), opening the vacuum tank cover after treatment, measuring temperature and taking samples again, determining hydrogen and oxygen, adjusting wire feeding (adding aluminum wire, calcium silicon wire, sulfur wire, etc. to adjust the composition) according to the test results, stopping argon blowing, completing refining and hoisting the ladle. The VD furnace can realize operations such as argon blowing, oxygen blowing, blue removal, vacuum degassing, and fine-tuning of alloy composition under vacuum; it can perform general vacuum degassing treatment on molten steel and fine-tune alloy composition under vacuum.

[0003] During the wire feeding process of the VD furnace, a large amount of smoke and dust will be generated in the workshop, which will easily cause a sharp deterioration of the workshop environment. During the operation, the ladle needs to be lifted back and forth above the VD furnace, so it is not convenient to install a fixed dust hood above the VD furnace.

[0004] A patent with publication number CN214223792U proposes a non-powered VD furnace dust removal device. The non-powered VD furnace dust removal device includes a dust hood, a support frame, a slide rail, and a plurality of ion wind electrostatic precipitators, each of which is arranged on the dust hood, and the dust hood is arranged above the VD furnace. The two opposite side edges of the dust hood are slidably connected to the support frame and the slide rail respectively, so that the dust hood can move between two adjacent wire feeding stations in the VD furnace. However, the dust removal effect of the dust removal device is not ideal, and there is a problem of smoke leakage. Utility Model Content

[0005] In view of the above problems existing in the prior art, the purpose of the utility model is to provide a VD refining furnace dust removal device.

[0006] In order to solve the above problems, the technical solution adopted by the utility model is as follows:

[0007] A VD refining furnace dust removal device comprises a dust hood, a slide rail and a dust removal plate, wherein a plurality of ion wind electrostatic dust collectors are arranged on the dust removal plate, the dust removal plate is arranged above the refining furnace body, the dust hood is arranged on both sides of the dust removal plate in a vertical downward direction, slide rails are arranged on both sides of the refining furnace body, a support frame is slidably connected to the slide rails, and the dust hood is arranged on the support frame.

[0008] Optionally, the dust collecting hood is a dust collecting hood which is concave in the middle and convex on all sides, and an ion wind electrostatic dust collector is arranged inside the dust collecting hood.

[0009] Optionally, the slide rail is provided with a lifting groove along the vertical direction, the support frame is slidably connected to the lifting groove, and the slide rail is provided with a lifting limiter, which is used to drive the support frame to slide and limit the support frame.

[0010] Optionally, the support frame is in a U-shape with an opening facing downward, and two front and rear lifting legs are arranged at the bottom of the support frame, and rollers are arranged under the lifting legs.

[0011] Optionally, the lifting limiter includes a lifting seat and a top block, the roller is arranged on the top block, a telescopic spring is arranged between the lifting seat and the top block, a telescopic rod is arranged at the center of the telescopic spring, and a driving device is arranged under the lifting seat.

[0012] Optionally, a distance sensor is provided on the top block, a control box is provided on the support frame, the control box is connected to the driving device, and the distance sensor is used to judge the position of the top block.

[0013] Optionally, the dust removal plate width is greater than the furnace cover width.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] The utility model sets dust hoods on both sides of the VD furnace, which improves the fume absorption effect without affecting smelting; and the support frame can be lifted up and down by driving the lifting member, so as to facilitate the adjustment of the distance between the lifting plate and the VD furnace, which can further enhance the dust removal effect. By setting a telescopic spring between the top block and the lifting seat, under normal circumstances, the top block is flush with the slide rail. When the roller slides to the top of the top block, the spring contracts under the action of gravity, and the roller slides down into the lifting slot, which can limit the device and prevent the roller from sliding; a telescopic rod is set in the middle of the telescopic spring to control the sliding direction of the top block to prevent the top block from offsetting. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of a dust removal device for a VD refining furnace;

[0017] In the figure: 1. dust removal hood; 2. slide rail; 21. lifting slot; 3. dust removal plate; 4. refining furnace; 5. support frame; 51. roller; 6. lifting seat; 7. top block; 8. telescopic spring; 81. telescopic rod; 9. driving device. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0019] like Figure 1 As shown, a technical solution is provided below: a dust removal device for a VD refining furnace 4, comprising a dust hood 1, a slide rail 2 and a dust removal plate 3, on which a plurality of ion wind electrostatic dust collectors are arranged, the dust removal plate 3 is arranged above the refining furnace 4, the width of the dust removal plate 3 is greater than the width of the furnace cover of the refining furnace 4, the dust hood 1 is arranged downward on both sides of the dust removal plate 3 in the vertical direction, the slide rail 2 is arranged on both sides of the body of the refining furnace 4, the slide rail 2 is slidably connected with a support frame 5, and the dust hood 1 is arranged on the support frame 5. The dust hood 1 is a dust collecting hood with a concave middle and convex surroundings, and an ion wind electrostatic dust collector is arranged inside the dust hood 1. The support frame 5 is in a U-shape with the opening facing downwards. The two sides of the support frame 5 are respectively connected to the two sides of the dust cover 1. The two sides of the dust removal plate 3 are provided with cross beams. The two ends of the cross beams are respectively connected to the support frame 5 on both sides of the refining furnace 4, so that the structure is more stable. Two front and rear lifting legs are provided at the bottom of the support frame 5. Rollers 51 are provided under the lifting legs, so that the dust removal device can move between two adjacent wire feeding stations of a refining furnace 4. The flue gas enters from the vents on the side of the dust removal hood 1 and the dust removal plate 3 facing the refining furnace 4, and is treated by the ion wind electrostatic precipitator. The purified flue gas is discharged from the exhaust holes on the side of the dust removal hood 1 and the dust removal plate 3 away from the refining furnace 4.

[0020] A lifting groove 21 is provided on the slide rail 2 in the vertical direction, the support frame 5 is slidably connected with the lifting groove 21, and a lifting limiter is provided on the slide rail 2. The lifting limiter includes a lifting seat 6 and a top block 7, the roller 51 is located on the top block 7, a telescopic spring 8 and a telescopic rod 81 are provided between the lifting seat 6 and the top block 7, the telescopic rod 81 is arranged at the center of the telescopic spring 8, and a driving device 9 is provided below the lifting seat 6. In this embodiment, the driving device 9 adopts an electro-hydraulic push rod. A distance sensor is provided on the side wall of the top block 7, and a control box is installed on the support frame 5. The control box is connected to the driving device 9, and the distance sensor is used to judge the position of the top block 7. When dust removal is needed, the dust removal device is moved along the slide rail 2 to the required position, the telescopic spring 8 is compressed, and the top block 7 moves down, so that the dust removal device can be limited to prevent the roller 51 from sliding away; when the distance sensor senses the change in the distance between the top block 7 and the slide rail 2, the controller controls the lifting seat 6 to rise and fall, and moves the dust removal plate 3 to a suitable dust removal height, thereby improving the dust removal effect; after the dust removal is completed, the top block 7 is lifted and lowered again to be flush with the slide rail 2, and the roller 51 can slide along the slide rail 2.

[0021] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A VD refining furnace dust removal device, characterized in that: The invention comprises a dust removal cover (1), a slide rail (2) and a dust removal plate (3), wherein a plurality of ion wind electrostatic dust collectors are arranged on the dust removal plate (3), the dust removal plate (3) is arranged above a refining furnace (4) body, the dust removal cover (1) is arranged downwardly on both sides of the dust removal plate (3) in a vertical direction, slide rails (2) are arranged on both sides of the refining furnace (4) body, a support frame (5) is slidably connected to the slide rails (2), and the dust removal cover (1) is arranged on the support frame (5); The dust collecting cover (1) is a dust collecting cover which is concave in the middle and convex around. An ion wind electrostatic dust collector is arranged inside the dust collecting cover (1); The slide rail (2) is provided with a lifting groove (21) along the vertical direction, the support frame (5) is slidably connected to the lifting groove (21), and the slide rail (2) is provided with a lifting limiter, which is used to drive the support frame (5) to slide and limit the support frame (5).

2. A VD refining furnace dust removal device according to claim 1, characterized in that: The support frame (5) is in a U-shape with an opening facing downwards. Two front and rear lifting legs are arranged at the bottom of the support frame (5), and rollers (51) are arranged below the lifting legs.

3. A VD refining furnace dust removal device according to claim 2, characterized in that: The lifting and limiting component comprises a lifting seat (6) and a top block (7), the roller (51) is arranged on the top block (7), a telescopic spring (8) is arranged between the lifting seat (6) and the top block (7), a telescopic rod (81) is arranged at the center of the telescopic spring (8), and a driving device (9) is arranged below the lifting seat (6).

4. A VD refining furnace dust removal device according to claim 3, characterized in that: The top block (7) is provided with a distance sensor, the support frame (5) is provided with a control box, the control box is connected to the drive device (9), and the distance sensor is used to judge the position of the top block (7).

5. A VD refining furnace dust removal device according to claim 1, characterized in that: The width of the dust removal plate (3) is greater than the width of the furnace cover.

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