Split type furnace door frame of electric arc furnace

Abstract

The utility model provides a split type furnace door frame of an electric arc furnace, which is used for replacing a traditional water-cooling furnace door frame and belongs to the technical field of casting equipment. The furnace door frame comprises an inner furnace door frame and an outer furnace door frame, a main body of the outer furnace door frame is of a box-type structure, the outer furnace door frame is filled with knotted magnesia and is fastened outside a furnace body in a bolt connection mode, and the inner furnace door frame is of a door-shaped structure erected by arched bricks and vertical bricks, is tightly attached to the connecting face of the outer furnace door frame and is built in the electric arc furnace body in a multi-layer mode. The furnace door frame is firm in structure and easy to build, a traditional water-cooled furnace door frame is replaced, heat loss in the smelting process can be reduced, the water leakage risk of the water-cooled furnace door frame is eliminated, and the safety of smelting operation is improved; compared with an integral structure of a water-cooled furnace door frame, the split type furnace door frame can be locally maintained and replaced after being damaged, overall dismantling is avoided, and repairing time is saved.

Description

Technical Field

[0001] This utility model relates to a split furnace door frame for electric arc furnaces, used to replace traditional water-cooled furnace door frames, and belongs to the field of casting equipment technology. Background Technology

[0002] Traditional electric arc furnaces have a door frame structure that is an integral "door"-shaped water-cooled box. The water-cooled box is welded from steel plates, and the water channels inside the box are connected to the cooling water inlet and outlet. A "door"-shaped connecting plate is welded to the front of the water-cooled box structure and is bolted to the corresponding flange on the furnace body. During smelting operations, the door frame structure operates in a high-temperature zone of over 1500 degrees Celsius. As the furnace wall continues to erode, the exposed part of the door frame is also subject to impacts from large pieces of material falling during charging. If the door frame leaks during this process, the leaked water will inevitably enter the molten steel, affecting not only the quality of the molten steel but also posing a significant safety risk. Utility Model Content

[0003] To address the aforementioned issues, this utility model provides a split-type furnace door frame for electric arc furnaces, replacing the traditional water-cooled furnace door frame. This solves the potential water leakage problem of water-cooled furnace door frames during smelting operations and improves the safety of smelting operations.

[0004] The technical method adopted by this utility model to solve the technical problem is as follows: The split furnace door frame of the electric arc furnace includes an inner furnace door frame 1 and an outer furnace door frame 2. The inner furnace door frame 1 is constructed by multiple layers of arched bricks 11 and vertical bricks 13. The arched bricks 11 are supported on two vertical bricks 13 to form a "door"-shaped structure. The outer periphery of the arched bricks 11 is provided with a protective plate 12. The structure of the outer furnace door frame 2 is a "door"-shaped box structure with one end open. It includes an open box 21 welded from steel plates, a front end face 22, and a connecting plate 23. The box 21 is filled with knotted magnesia sand 24. A furnace door guide rail is welded on the front end face 22. The connecting plate 23 has through holes and is connected to the furnace body by bolts.

[0005] The overlapping surfaces of the arched brick 11 and the upright brick 13 are provided with corresponding overlapping platforms, all of which are made of high-temperature resistant structural ceramics.

[0006] The guard plate 12 is welded from steel plates and its dimensions correspond to those of the arch bricks 11. They are pre-assembled together by adhesive bonding.

[0007] The beneficial effects of this utility model are: the electric arc furnace door frame structure is sturdy and easy to construct, replacing the traditional water-cooled furnace door frame, which can reduce heat loss during the smelting process, eliminate the risk of water leakage from the water-cooled furnace door frame, and improve the safety of smelting operations; compared with the integral water-cooled furnace door frame structure, the split structure of the inner and outer furnace door frames can realize partial repair and replacement after damage, avoiding overall dismantling and saving repair time. Attached Figure Description

[0008] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0009] Figure 1 This is a cross-sectional structural schematic diagram of the present invention;

[0010] Figure 2 This is the main view of the split furnace door frame of the electric arc furnace;

[0011] Figure 3 This is a top view of the split furnace door frame of the electric arc furnace;

[0012] Figure 4 This is a structural schematic diagram of the inner furnace door frame;

[0013] Figure 5 This is a structural schematic diagram of the outer furnace door frame.

[0014] In the diagram: 1—inner furnace door frame, 2—outer furnace door frame, 11—arched brick, 12—guard plate, 13—standing brick, 21—box body, 22—front end face, 23—connecting plate, 24—magnesia. Detailed Implementation

[0015] like Figure 1 As shown, the split furnace door frame of the electric arc furnace includes an inner furnace door frame 1 and an outer furnace door frame 2. The outer furnace door frame 2 is fastened to the corresponding flange of the furnace door frame outside the furnace body by bolting through a connecting plate 23. The inner furnace door frame 1 is closely attached to the connecting surface of the outer furnace door frame 2 and is built in multiple layers inside the electric arc furnace body.

[0016] like Figure 4 As shown, the inner furnace door frame 1 is constructed by overlapping arched bricks 11 and upright bricks 13. The arched bricks 11 rest on two upright bricks 13 to form a "door"-shaped structure. Corresponding overlapping platforms are provided on the overlapping surfaces to prevent the upright bricks from shifting due to pressure from the furnace wall bricks. The thickness of the bricks and the number of layers are designed according to the thickness of the furnace body, and all are made of high-temperature resistant structural ceramics. A protective plate 12 is bonded to the outer periphery of the arched bricks 11 to enhance the structure's impact resistance. The protective plate 12 is welded from steel plates, and its dimensions correspond to those of the arched bricks 11. They are pre-assembled together by bonding before being laid.

[0017] like Figure 5 As shown, the main body of the outer furnace door frame 2 is a "door" shaped box 21 welded from steel plates. The front end face 22 is a slope, on which channel steel is welded as a guide rail for the furnace door. The rear end is open and filled with knotted magnesia 24. Connecting plates 23 are welded on three sides of the rear end. The connecting plates 23 have through holes and are connected to the furnace body by bolts.

[0018] During smelting operations, the outer furnace door frame 2 is subjected to less heat and stress, making it less prone to damage and allowing for longer-term use. The inner furnace door frame 1, operating in a high-temperature zone, is more susceptible to damage than the outer furnace door frame 2. The inner furnace door frame 1 can be repaired or replaced separately if the outer layer is damaged, or it can be rebuilt along with the furnace after multiple layers are damaged, depending on the situation.

Claims

1. A split-type furnace door frame for an electric arc furnace, characterized by: The furnace door frame includes an inner furnace door frame (1) and an outer furnace door frame (2). The inner furnace door frame (1) is constructed by multiple layers of arched bricks (11) and upright bricks (13). The arched bricks (11) are placed on two upright bricks (13) to form a "door" structure. The outer periphery of the arched bricks (11) is provided with a protective plate (12). The outer furnace door frame (2) is a box structure with one end open. It includes a box (21) welded from steel plates, a front end face (22), and a connecting plate (23). The box (21) is filled with knotted magnesia sand (24). A furnace door guide rail is welded on the front end face (22). The connecting plate (23) has through holes and is connected to the furnace body by bolts.

2. The split-type furnace door frame of the electric arc furnace according to claim 1, characterized in that: The overlapping surfaces of the arched bricks (11) and the upright bricks (13) are provided with corresponding overlapping platforms, all of which are made of high-temperature resistant structural ceramics.

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