Conductive device for submerged arc furnace holder

Abstract

The utility model relates to a conductive device for a submerged arc furnace holder. The conductive device comprises an electrode, a conductive steel tile, a pressure ring and a conductive copper pipe, the electrode is clamped and connected in the pressure ring, and a conductive steel tile is clamped between the electrode and the pressure ring; the top end of the hollow conductive steel tile is communicated with a conductive copper pipe; the top end of the conductive steel tile is also connected with a lifting rod for lifting; the conductive copper pipe comprises a connecting cup opening and a connecting pipe; the connecting cup opening is communicated with the conductive steel tile through a connecting pipe; the conductive steel tile comprises a conductive tile body of a hollow structure. The side, close to the pressure ring, of the conductive tile body is in threaded connection with an ejector block. And an insulator is cushioned between the conductive tile body and the top block. According to the utility model, after the contact surface of the electrode is damaged due to sparking, maintenance can be carried out through simple welding, so that the operation loss cost of parts in the production process is greatly reduced, and the production continuity is improved.

Description

Technical Field

[0001] This utility model relates to the field of metallurgical technology, specifically a conductive device for a holder of an electric arc furnace. Background Technology

[0002] The working principle of a submerged arc furnace is as follows: current is output from the secondary winding of a transformer to a short-circuit power grid system, which then supplies power to the conductive copper pads of the holder, ultimately transmitting the power to the electrodes. Currently, the conductive device used in submerged arc furnace holders is a copper pad, which is used to conduct electricity to the electrodes. The main function of the conductive copper pad is to conduct electricity to the electrodes. The main material of the conductive copper pad is T2 copper, which is widely used in submerged arc furnaces in industries such as industrial silicon, ferrosilicon, ferromanganese, and high-carbon ferrochrome. The conductive copper pad is a consumable part during production and operation, and the electrodes are clamped by a pressure ring and hydraulic cylinder. When there is poor contact between the conductive copper pad and the electrode contact surface, the conductive copper pad will be damaged due to arcing under energized conditions. This damage is difficult to repair, and the production cost of conductive copper pad components is high. Utility Model Content

[0003] The purpose of this utility model is to provide a conductive device for a holder of a submerged arc furnace, which is easy to maintain while ensuring conductivity and reducing component costs.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] The conductive device for the holder of the electric arc furnace includes an electrode, a conductive steel tile, a pressure ring, and a conductive copper tube. The electrode is clamped and connected inside the pressure ring, and the conductive steel tile is also clamped between the electrode and the pressure ring. The top of the hollow conductive steel tile is connected to the conductive copper tube. The top of the conductive steel tile is also connected to a lifting rod for lifting. The conductive copper tube includes a connecting cup and a connecting pipe. The connecting cup is connected to the conductive steel tile through the connecting pipe. The conductive steel tile includes a hollow conductive tile body, and a top block is threadedly connected to the side of the conductive tile body near the pressure ring. An insulator is also placed between the conductive tile body and the top block.

[0006] In the aforementioned conductive device used in the holder of the electric arc furnace, the conductive tile material is Q245R or Q235B.

[0007] In the aforementioned conductive device for the holder of a submerged arc furnace, reinforcing ribs are provided inside the conductive tile body.

[0008] In the aforementioned conductive device for the holder of an electric arc furnace, the thickness of the conductive steel tile and the electrode contact panel is 20-35 mm.

[0009] The beneficial effects of this utility model are:

[0010] This invention replaces the conductive copper tile with a conductive steel tile, which slightly reduces conductivity. The conductive steel tile can be repaired by simple welding after being damaged by arcing at the contact surface with the electrode. The cost of the conductive steel tile component is about 1 / 10 of that of the conductive copper tile, which greatly reduces the operating costs of components during production and improves the continuity of production. Attached Figure Description

[0011] Figure 1 This is a schematic diagram illustrating the structural principle of the gripper of this utility model;

[0012] Figure 2 This is a schematic diagram of the main structure of this utility model;

[0013] Figure 3 This is a top view of the structure of this utility model.

[0014] In the picture:

[0015] 1—Electrode; 2—Conductive steel tile; 203—Conductive tile body; 204—Insulator; 205—Top block; 206—Reinforcing rib; 3—Pressure ring; 4—Conductive copper tube; 401—Connecting cup mouth; 402—Connecting pipe; 5—Hanging rod. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of this utility model.

[0017] refer to Figures 1 to 3 This utility model relates to a conductive device for a holder of a submerged arc furnace, comprising an electrode 1, a conductive steel tile 2, a pressure ring 3, and a conductive copper tube 4; the electrode 1 is clamped and connected inside the pressure ring 3, and the conductive steel tile 2 is also clamped between the electrode 1 and the pressure ring 3; the top of the hollow conductive steel tile 2 is connected to the conductive copper tube 4; the top of the conductive steel tile 2 is also connected to a lifting rod 5 for lifting; the conductive copper tube 4 includes a connecting cup 401 and a connecting pipe 402; the connecting cup 401 is connected to the conductive steel tile 2 through the connecting pipe 402; the conductive steel tile 2 includes a hollow conductive tile body 203, and the conductive tile body 203 is provided with reinforcing ribs 206 inside; a top block 205 is threadedly connected to the side of the conductive tile body 203 near the pressure ring 3; an insulator 204 is also placed between the conductive tile body 203 and the top block 205.

[0018] The conductive tile body 203 is mainly made of Q245R; the connecting cup 401 is the connection interface between the handle and the conductive copper tube, and is made of seamless steel pipe; the connecting pipe of the connecting cup 401 is made of thick-walled seamless steel pipe; the conductive steel tile body 203 is a butt welded steel plate component; the insulator 204, due to its use in a high-temperature environment of 650℃, is made of mica material HP-5 to ensure insulation between the conductive tile body 203 and the top block 205; the top block 205 is connected to the pressure ring 3 by the cylinder push rod or screw.

[0019] Conductive steel tile 2 is part of the holder of the electric arc furnace. Installation location reference: Figure 3 The hydraulic cylinder in pressure ring 3 extends, pushing the conductive steel tile 2 towards and clamping it to electrode 1. This allows the current on the conductive steel tile 2 to be conducted to electrode 1, completing the smelting operation. The conductive steel tile 2 is suspended from the holding cylinder of the holder by a lifting rod 5.

[0020] This invention is a consumable component during production and operation. Under normal operating conditions, it is cooled by water flowing through the conductive copper tube 4, and its service life can generally be extended to 6 to 18 months. If the contact surface between the conductive steel tile 2 and the electrode 1 is damaged by sparking under energized conditions, it can be repaired by simple welding, resulting in low operating costs.

[0021] The conductive steel tile 2 is made of Q245R steel. The steel tile body adopts ordinary welding process and the welding material is J422. The thickness of the contact panel between the conductive steel tile 2 and the electrode 1 is 20-35 mm. After welding, the mechanical tolerance of the arc plate of the contact surface between the steel tile and the electrode is ±1 mm, and the surface roughness is 12.5.

[0022] After the conductive steel tile 2 is manufactured, a water pressure test is performed: there should be no leakage within 30 minutes at 0.5 MPa. The design reference current density at the contact surface between the conductive steel tile 2 and electrode 1 is 1.2~2.5 A / cm². Applicable furnace types range from 1800-9000 KVA. This utility model replaces the conductive copper tile with a conductive steel tile (material: Q245R). While conductivity decreases slightly, it is easy to repair and weld after damage. The component cost is very low; the cost of the conductive steel tile is approximately 1 / 10 of that of the copper tile, significantly reducing component operating costs during production and improving production continuity. Its application in a 6000 KVA solid waste refining furnace project further verifies its low failure rate, reliable performance, and low cost.

[0023] The conductive steel tile structure of this utility model is selected. The conductive steel tile body is made of Q245R and is an integral welded component. Alternatively, the conductive steel tile body can be made of Q235B and the main body can be welded. Neither method affects the core concept of this utility model and both can be considered as imitations of this utility model.

[0024] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A conductive device for a holder of a submerged arc furnace, characterized in that, The device includes an electrode (1), a conductive steel tile (2), a pressure ring (3), and a conductive copper tube (4); the electrode (1) is clamped and connected inside the pressure ring (3), and the conductive steel tile (2) is also clamped between the electrode (1) and the pressure ring (3); the top of the hollow conductive steel tile (2) is connected to the conductive copper tube (4); the top of the conductive steel tile (2) is also connected to a lifting rod (5) for lifting; the conductive copper tube (4) includes a connecting cup (401) and a connecting pipe (402); the connecting cup (401) is connected to the conductive steel tile (2) through the connecting pipe (402); the conductive steel tile (2) includes a hollow conductive tile body (203), and a top block (205) is threadedly connected to the side of the conductive tile body (203) near the pressure ring (3); an insulator (204) is also placed between the conductive tile body (203) and the top block (205).

2. The conductive device for a holding device of a submerged arc furnace according to claim 1, characterized in that, The conductive tile body (203) is made of Q245R or Q235B material.

3. The conductive device for a holding device of a submerged arc furnace according to claim 1, characterized in that, The conductive tile body (203) is provided with reinforcing ribs (206).

4. The conductive device for a holding device of a submerged arc furnace according to claim 1, characterized in that, The thickness of the contact panel between the conductive steel tile (2) and the electrode (1) is 20-35 mm.

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