Front end water cooled charging spout for electric furnace

Abstract

The utility model provides front end water -cooling feeding trough of electric furnace, relate to water -cooling feeding trough technical field, including feeding trough body, the feeding trough body is provided with double -deck tank body outer wall and double -deck tank body inner wall, connect flange base, the connect flange base sets up at the surface of feeding trough body, the connect flange base is fixedly connected with feeding trough body, annular cooling water pipe, the annular cooling water pipe sets up inside feeding trough body, the annular cooling water pipe is fixedly connected with feeding trough body. The utility model solves the problem that front end water -cooling feeding trough is located in electric furnace feeding port in the process of feeding, is subjected to about 1500 DEG C high temperature radiation in the furnace for a long time, high frequency vibration, scrap steel impact and cinder splashing. Lead to water -cooling feeding trough to be easy to high temperature oxidation, thermal stress fatigue, mechanical wear and tear, burn loss aging, lead to front end water pipe fracture and water leakage. Exist the problem of serious in -furnace water, contact high temperature molten steel and cause explosion risk.

Description

Technical Field

[0001] This utility model relates to the technical field of water-cooled feeding tanks, specifically to a water-cooled feeding tank at the front end of an electric furnace. Background Technology

[0002] Water-cooled front-end feeding troughs for electric arc furnaces are suitable for main steel smelting processes (long-process steel plants, short-process steel plants), special smelting fields (stainless steel smelting, alloy steel production), renewable resource utilization (scrap steel recycling, ship dismantling), and cutting-edge technology support (green hydrogen electric arc furnaces). The performance of the water-cooled front-end feeding trough directly affects steelmaking efficiency, equipment life, production costs, and safety.

[0003] Currently, the scrap steel charging troughs widely used in the market for electric arc furnaces are typically equipped with water-cooling structures. Because the front-end water-cooled charging trough is located inside the electric arc furnace charging port during the charging process, it is constantly exposed to high-temperature radiation (approximately 1500°C) within the furnace, high-frequency vibration, scrap steel impact, and slag splashing. This leads to the water-cooled charging trough being prone to high-temperature oxidation, thermal stress fatigue, mechanical wear, and aging due to burning, resulting in water pipe rupture and leakage at the front end. This poses a serious risk of water entering the furnace and contact with molten steel, potentially causing an explosion. Utility Model Content

[0004] This utility model provides a water-cooled feeding trough at the front end of an electric furnace, which solves the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:

[0006] An embodiment of this utility model provides a water-cooled feeding trough at the front end of an electric furnace, comprising:

[0007] The feeding tank body is provided with a double-layered outer wall and a double-layered inner wall;

[0008] A connecting flange base is disposed on the surface of the feeding trough body and is fixedly connected to the feeding trough body.

[0009] An annular cooling water pipe is installed inside the feeding tank body and is fixedly connected to the feeding tank body. The annular cooling water pipe has an inlet and an outlet at both ends and penetrates the outer wall of the double-layer tank body.

[0010] Furthermore, the surface of the connecting flange base is provided with multiple fixing holes, through which fixing bolts can pass to fix the feeding trough body to the surface of the rear water-cooled feeding trough, and the surface of the feeding trough body is fixedly connected with strip-shaped buckles.

[0011] Furthermore, the interior of the feeding tank body is configured as a tank cooling water tank, and the interior of the annular cooling water pipe is configured as a water pipe cooling channel.

[0012] Furthermore, multiple guide plates are fixedly connected to the inner wall of the feeding tank body, and the guide plates are located on the inner wall of the cooling water tank of the tank body.

[0013] Furthermore, the inside of the feeding tank body is provided with multiple cooling water pipes a, and the two ends of the cooling water pipes a are respectively provided with water inlet and water outlet.

[0014] Furthermore, the outlet and inlet of the cooling water pipe a and the annular cooling water pipe are provided with connecting buckles, which can be stably connected to the external circulating water pipe.

[0015] The above-described solution of this utility model has at least the following beneficial effects:

[0016] 1. This utility model, by adopting a guide plate structure inside the cooling water channel of the tank, increases the cooling water flow rate, significantly improves the cooling effect, effectively protects the wear resistance of the inner wall plate, solves the problem of reduced wear resistance caused by high temperature radiation, and the rounded corner transition structure solves the problem of thermal stress concentration during use, effectively solving the problem of cooling water channel cracking, thus increasing the service life of the front water-cooled feeding tank, improving production efficiency, enhancing overall wear resistance, and solving the effects of thermal stress fatigue. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a top-view cross-sectional structural diagram of the present invention;

[0019] Figure 3 This is a rear view schematic diagram of a partial structure of this utility model;

[0020] Figure 4 This is a side view cross-sectional structural schematic diagram of this utility model;

[0021] Figure 5 This is a partial cross-sectional structural diagram of the annular cooling water pipe of this utility model.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1. Feeding tank body; 11. Guide plate; 2. Connecting flange base; 21. Fixing hole; 22. Strip buckle; 31. Double-layer tank inner wall; 32. Double-layer tank outer wall; 301. Water pipe cooling channel; 302. Tank cooling channel; 4. Annular cooling water pipe; 41. Water inlet; 42. Water outlet; 43. Cooling water pipe a; 44. Connecting buckle. Detailed Implementation

[0024] Exemplary embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this invention will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0025] like Figures 1 to 5 As shown, an embodiment of this utility model provides a water-cooled charging trough for the front end of an electric furnace, comprising: a charging trough body 1, the charging trough body 1 having a double-layered outer wall 32 and a double-layered inner wall 31; a connecting flange base 2, the connecting flange base 2 being disposed on the surface of the charging trough body 1 and fixedly connected to the charging trough body 1; and an annular cooling water pipe 4, the annular cooling water pipe 4 being disposed inside the charging trough body 1 and fixedly connected to the charging trough body 1, with inlets at both ends of the annular cooling water pipe 4. Water inlet 41 and water outlet 42, and annular cooling water pipe 4 penetrate the double-layer outer wall 32 of the charging trough body 1. The front water-cooled charging trough is an important component in the electric arc furnace scrap charging device. It is located at the front end of the electric arc furnace charging device. When charging is carried out, the traveling trolley moves forward to the electric arc furnace position and pushes the front water-cooled charging trough into the electric arc furnace charging port. The scrap steel slides into the trough of the electric arc furnace charging device through the upstream conveying trough. At the same time, the vibration unit works to push the scrap steel in the charging device into the electric arc furnace, completing the charging operation.

[0026] like Figure 1 and Figure 3 As shown, a connecting flange base 2 is provided on the surface of the feeding tank body 1. The connecting flange base 2 is fixedly connected to the feeding tank body 1. Multiple fixing holes 21 are provided on the surface of the connecting flange base 2. Fixing bolts can pass through the fixing holes 21 to fix the feeding tank body 1 to the surface of the rear water-cooled feeding tank. A strip buckle 22 is fixedly connected to the surface of the feeding tank body 1.

[0027] like Figure 4As shown, the charging trough body 1 has a double-layered outer wall 32 and a double-layered inner wall 31. The interior of the charging trough body 1 is configured as a cooling water tank, and the interior of the annular cooling water pipe 4 is configured as a water pipe cooling channel 301. The electric furnace water-cooled front-end charging trough has a double-walled structure. The double-layered inner wall 31 of the charging trough body 1 is made of wear-resistant plate, and the double-layered outer wall 32 is made of high-strength carbon steel. Multiple guide plates 11 are fixedly connected to the inner wall of the charging trough body 1, and the guide plates 11 are located on the inner wall of the cooling water tank. The original right angle and acute angle positions of the electric furnace water-cooled front-end charging trough have been changed to rounded corners to a certain extent to avoid thermal stress concentration during later use, which could lead to cracking of the charging trough body 1. Therefore, the material is cut from a whole plate to avoid splicing welds, reduce welding deformation and welding stress, and divide the water-cooling cavity into a high-temperature zone (near the furnace mouth). In the low-temperature zone (away from the furnace opening) and the high-temperature zone, a guide plate 11 structure is adopted to increase the cooling water flow velocity, improve the heat transfer coefficient, and ensure that the heat transfer coefficient is >5000W / (m²·K).

[0028] like Figures 3 to 5 As shown, an annular cooling water pipe 4 is installed inside the feeding tank body 1 and is fixedly connected to the feeding tank body 1. The annular cooling water pipe 4 has an inlet 41 and an outlet 42 at both ends. The annular cooling water pipe 4 penetrates the double-layered outer wall 32 of the feeding tank body 1. The annular cooling water pipe 4 uses a high-pressure boiler tube, forming a cooling water channel 302 between the inner and outer walls. This channel is divided into four groups, each with an independent inlet and outlet 42. An annular cooling water pipe 4 is embedded along the upper edge and front edge of the water-cooled feeding tank, allowing for independent water cooling during feeding. The tank body 1 is internally connected to multiple cooling water pipes a43. The two ends of the cooling water pipes a43 are respectively provided with inlet 41 and outlet 42. The outlet 42 and inlet 41 of the cooling water pipes a43 and the annular cooling water pipe 4 are connected by a connecting buckle 44. The connecting buckle 44 can be stably connected to the external circulating water pipe. The low temperature zone adopts a serpentine water channel to extend the residence time of the cooling water. The temperature difference between the inlet and outlet of the cooling water is strictly controlled within 15℃ to avoid local overcooling or overheating. At the same time, the water channel adopts a smooth transition structure to effectively avoid the occurrence of sharp corners that affect the water flow speed.

[0029] In this embodiment of the utility model, the front-end water-cooled feeding trough is an important component of the electric arc furnace scrap feeding device. It is located at the front end of the electric arc furnace feeding device. When the feeding operation is performed, the traveling trolley moves forward to the electric arc furnace position and pushes the front-end water-cooled feeding trough into the electric arc furnace feeding port. The scrap steel slides into the trough of the electric arc furnace feeding device through the upstream conveying trough. At the same time, the vibration unit works to push the scrap steel in the feeding device into the electric arc furnace, thus completing the feeding operation.

[0030] The electric furnace water-cooled front-end feeding trough has a double-wall structure, with a cooling water channel 302 formed between the inner and outer walls. It is divided into four groups, each with an independent inlet and outlet 42. A ring-shaped cooling water pipe 4 is embedded along the upper edge and front edge of the water-cooled feeding trough, with separate water inlet and outlet for cooling. The inner wall 31 of the double-layered trough body 1 is made of wear-resistant plate, and the outer wall 32 of the double-layered trough body is made of high-strength carbon steel. The ring-shaped cooling water pipe 4 is made of high-pressure boiler tube. The original right angle and acute angle positions of the electric furnace water-cooled front-end feeding trough have been changed to rounded corners to avoid thermal stress concentration during later use, which could lead to cracking of the feeding trough body 1. Therefore, the material is cut from a whole plate to avoid splicing welds and reduce welding deformation and welding stress.

[0031] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A water-cooled feeding trough at the front end of an electric furnace, characterized in that, include: The feeding tank body (1) is provided with a double-layered outer wall (32) and a double-layered inner wall (31). A connecting flange base (2) is provided on the surface of the feeding trough body (1) and is fixedly connected to the feeding trough body (1); An annular cooling water pipe (4) is installed inside the feeding tank body (1). The annular cooling water pipe (4) is fixedly connected to the feeding tank body (1). The two ends of the annular cooling water pipe (4) are respectively provided with an inlet (41) and an outlet (42). The annular cooling water pipe (4) penetrates the outer wall (32) of the double-layer tank body (1).

2. The water-cooled feeding trough at the front end of the electric furnace according to claim 1, characterized in that, The surface of the connecting flange base (2) is provided with multiple fixing holes (21), and fixing bolts can be passed through the fixing holes (21) to fix the feeding tank body (1) on the surface of the rear water-cooled feeding tank. The surface of the feeding tank body (1) is fixedly connected with strip buckles (22).

3. The water-cooled feeding trough at the front end of the electric furnace according to claim 1, characterized in that, The interior of the feeding tank body (1) is configured as a tank cooling water tank, and the interior of the annular cooling water pipe (4) is configured as a water pipe cooling water channel (301).

4. The water-cooled feeding trough at the front end of the electric furnace according to claim 1, characterized in that, The inner wall of the feeding tank body (1) is fixedly connected with multiple guide plates (11), and the guide plates (11) are located on the inner wall of the tank cooling water tank.

5. The water-cooled feeding trough at the front end of the electric furnace according to claim 1, characterized in that, The inside of the feeding tank body (1) is provided with multiple cooling water pipes a (43), and the two ends of the cooling water pipes a (43) are respectively provided with water inlet (41) and water outlet (42).

6. The water-cooled feeding trough at the front end of the electric furnace according to claim 5, characterized in that, The outlet (42) and inlet (41) of the cooling water pipe a (43) and the annular cooling water pipe (4) are provided with connecting buckles (44), which can be stably connected to the external circulating water pipe.

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