Lower furnace shell structure

Abstract

The utility model discloses a lower furnace shell structure which comprises a body, the body comprises an arc-shaped part and a wall part, the arc-shaped part protrudes out of the body, and the body can swing around a swing shaft; the eccentric bottom tapping hole is formed in one side of the arc-shaped part; and the wall part tapping notch is formed in one side of the wall part. By means of the lower furnace shell structure, various tapping structures are provided, and the tapping amount of different requirements can be met.

Description

Technical Field

[0001] The utility model relates to a lower furnace shell structure and belongs to the technical field of smelting equipment. Background Art

[0002] The description in this section merely provides background information related to the disclosure of the present utility model and does not constitute prior art.

[0003] Electric furnaces in the smelting field are usually used to heat materials such as molten steel. Compared with fuel furnaces, electric furnaces heat materials quickly, at high temperatures, and are easy to control. Electric furnaces are easy to mechanize and automate during the production process, and their output quality is excellent. Therefore, electric furnaces are widely used in the smelting industry. The lower furnace shell refers to the lower part of the furnace body, which is used to withstand the pressure and temperature in the furnace. When working, it is necessary to use gravity to flow the molten steel in the electric furnace through the steel outlet in the lower furnace shell to facilitate further finished product smelting steps.

[0004] In existing production, eccentric bottom tapping (EBT) is usually used for tapping. The characteristic of eccentric bottom tapping is that the tapping port is perpendicular to the molten steel, so a faster tapping flow rate can be obtained, which shortens the tapping time. At the same time, since the eccentric bottom tapping is tapped at the bottom of the structure, the amount of slag is also reduced. However, the position setting of the eccentric bottom tapping is relatively fixed, and the tapping flow rate is difficult to adjust. In addition, the eccentric bottom tapping also has high structural strength and requirements for the tapping port. Therefore, in some usage scenarios, it is difficult to meet the minimum tapping volume requirements only through eccentric bottom tapping, and equipment needs to be switched, which significantly affects the smelting efficiency.

[0005] There is no lower furnace shell structure that can solve the above problems at present. Utility Model Content

[0006] The utility model aims to provide a lower furnace shell structure with a variety of steel tapping structures to meet the steel tapping amounts of different needs.

[0007] In order to achieve the above-mentioned purpose, the utility model discloses the following lower furnace shell structure, which includes:

[0008] A body, the body comprising an arc-shaped portion and a wall portion, the arc-shaped portion protrudes outward from the body, and the body can swing around a swing axis;

[0009] An eccentric bottom steel outlet, wherein the eccentric bottom steel outlet is arranged on one side of the arc-shaped portion;

[0010] The wall portion steel tapping notch is arranged on one side of the wall portion.

[0011] Furthermore, the eccentric bottom steel outlet and the wall steel outlet notch are jointly arranged on one side of the swinging direction of the main body.

[0012] Furthermore, the eccentric bottom steel outlet and the wall steel outlet notch both include a through hole structure with an opening and closing function.

[0013] Furthermore, the eccentric bottom steel outlet is arranged at an edge position of the arc-shaped portion close to the wall portion.

[0014] Furthermore, the steel tapping notch of the wall portion is arranged at an edge position of the wall portion away from the arc-shaped portion.

[0015] Furthermore, the steel-outlet notch of the wall portion protrudes outward toward a side away from the body, so that the inner wall portion of the wall portion at the position of the steel-outlet notch of the wall portion has a smooth wall surface.

[0016] Furthermore, a plug rod or a sliding nozzle is connected to the side of the wall portion steel outlet notch away from the main body.

[0017] Furthermore, the wall portion has a higher height on the side where the wall portion steel tapping notch is provided, and the top position of the wall portion steel tapping notch matches the top edge of the wall portion.

[0018] By means of the above technical solution, the beneficial effects of the utility model are as follows:

[0019] The main body of the lower furnace shell structure of the utility model includes two types of steel tapping ports, namely an eccentric bottom steel tapping port and a wall steel tapping notch, so two steel tapping forms can be realized. Compared with the existing conventional lower furnace shell which only has an eccentric bottom steel tapping port, the utility model can achieve a smaller steel tapping amount through the wall steel tapping notch, thus meeting various steel tapping amount requirements. In addition, the utility model uses a unique arc-shaped portion and a high wall portion design so that both types of steel tapping ports can achieve better use effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of this specification or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this specification. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0021] Figure 1 It is an axonometric diagram of a lower furnace shell structure provided in an embodiment of this specification;

[0022] Figure 2 It is an elevation view of a lower furnace shell structure provided in an embodiment of this specification;

[0023] In the figure: 1, main body; 11, arc-shaped portion; 12, wall portion; 2, eccentric bottom steel outlet; 3, wall steel outlet notch. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the technical solutions in this specification, the technical solutions in the embodiments of this specification will be clearly and completely described below in conjunction with the drawings in the embodiments of this specification. Obviously, the described embodiments are only part of the embodiments of this specification, not all of the embodiments. Based on the embodiments in this specification, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of this specification.

[0025] In the description of the present utility model, it should be noted that the terms "upper", "middle", "lower", "inner", "outer", "front", "back" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present utility model. The terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. The following describes the implementation method of the present utility model based on its overall structure.

[0026] See also Figure 1 to Figure 2 , a lower furnace shell structure of the present embodiment, comprising: a body 1, the body 1 comprising an arc portion 11 and a wall portion 12, the arc portion 11 protrudes outward from the body 1, and the body 1 can swing around a swing axis;

[0027] An eccentric bottom steel outlet 2, which is arranged on one side of the arc-shaped portion 11;

[0028] The wall steel tapping notch 3 is arranged on one side of the wall 12 .

[0029] Through the above structure, when in use, the eccentric bottom steel outlet 2 or the wall steel outlet notch 3 can be flexibly selected for steel tapping according to the requirements of steel tapping amount or steel tapping quality. If it is necessary to achieve rapid steel tapping, or if there is a high requirement for the purity of the steel tapping, the eccentric bottom steel outlet 2 on one side of the arc-shaped portion 11 can be selected for steel tapping. At this time, it is only necessary to seal the wall steel outlet notch 3, and after opening the eccentric bottom steel outlet 2, the body 1 is swung to achieve a large amount of molten steel flowing out of the eccentric bottom steel outlet 2, and the molten steel has a high purity; if it is necessary to control the steel tapping amount and there is a requirement for the minimum steel tapping amount, the eccentric bottom steel outlet 2 can be kept sealed, and only by opening the wall steel outlet notch 3 and shaking the body 1, a small amount of molten steel can be flowed out of the wall steel outlet notch 3. Specifically, in this embodiment, the swing shaft is a shaft that can move forward and backward, and the body 1 is mounted on the bar teeth extending along the swing direction of the body 1. The contact area between the body 1 and the bar teeth includes a tooth portion matching the bar teeth, and the tooth portion is meshed with the bar teeth. During the swinging process, the body 1 rolls back and forth on the teeth to achieve the swinging.

[0030] Furthermore, if Figure 2 As shown, the convex direction of the arc portion 11 is toward the bottom, and the arc profile of the arc portion 11 is a bowl-shaped wall surface with a steep middle and gentle four sides. There is no gap at the intersection of the periphery of the arc portion 11 and the wall portion 12, and the intersection of the periphery of the arc portion 11 and the wall portion 12 is generally arranged at a right angle. The projection of the arc portion 11 viewed from top to bottom is between the spindle shape and the ellipse. The wall portion 12 is arranged vertically in accordance with the above-mentioned bottom shape. The top position of the wall portion 12 includes a mounting step that matches other parts, so that the external furnace body device can be directly installed on the lower furnace shell of the utility model. The eccentric bottom steel tapping port 2 is comparable to the aperture of the wall steel tapping notch 3, which can maintain most of the conventional steel tapping requirements. When it is necessary to tap steel through the wall steel tapping notch 3, the shaking amplitude of the main body 1 can make most of the molten steel in the main body 1 submerge the lowest point of the wall steel tapping notch 3. When the steel tapping is completed and the molten steel needs to be discharged, the eccentric bottom steel tapping port 2 can be opened, and the eccentric bottom steel tapping port 2 can be set at the lowest point of the arc portion 11 by swinging the main body 1, so that the molten steel can be discharged completely by its own weight.

[0031] Specifically, the eccentric bottom steel outlet 2 is arranged at the outer edge position of the arc-shaped portion 11, but is not in direct contact with the wall portion 12. When it is necessary to discharge steel through the eccentric bottom steel outlet 2, it is only necessary to open the eccentric bottom steel outlet 2 and then shake the main body 1 away from the eccentric bottom steel outlet 2. The self-weight of the molten steel can be used to realize the discharge of a large amount of high-purity steel from the eccentric bottom steel outlet 2.

[0032] Furthermore, the eccentric bottom steel outlet 2 and the wall steel outlet notch 3 are arranged together on one side of the swing direction of the body 1. Specifically, by being arranged on one side of the same swing direction of the body 1, the body 1 can achieve the maximum steel outlet efficiency based on the unique swing displacement trajectory, avoiding the uncontrollable steel liquid outflow speed or incomplete steel outlet caused by the misalignment of the two steel outlets. At the same time, it should be noted that the eccentric bottom steel outlet 2 and the wall steel outlet notch 3 are both located on the same side of the swing axis.

[0033] Further, the eccentric bottom steel outlet 2 and the wall steel outlet slot 3 both include a through-hole structure with an opening and closing function. Specifically, the eccentric bottom steel outlet 2 can be opened and closed by adding a filler and sand, and a granular refractory material (such as magnesia) is added to the eccentric bottom steel outlet 2 to fill and sinter the steel outlet, thereby controlling the flow and direction of the molten steel, and having better sealing performance and less prone to air leakage. The wall steel outlet slot 3 can be controlled by a plug rod or a sliding water gate. In the embodiment in which the plug rod is used to control the closing of the wall steel outlet slot 3, the wall steel outlet slot 3 is inserted or pulled out by lifting or rotating a cylindrical refractory material, which has a simple structure and is easy to operate, but has a relatively short lifespan; in the embodiment in which the sliding water gate is used to control the closing of the wall steel outlet slot 3, a device composed of two layers of slide plates is aligning or staggering the wall steel outlet slot 3 by sliding horizontally or vertically, thereby controlling the flow and direction of the molten steel, and having better sealing performance, but the structure is also slightly complicated, and the production cost is higher.

[0034] Furthermore, the eccentric bottom steel outlet 2 is arranged at the edge of the arc-shaped portion 11 close to the wall portion 12. With the above structure, since the eccentric bottom steel outlet 2 is close to one side edge of the arc-shaped portion 11, in the process of finally discharging the molten steel, the molten steel can be completely discharged through the eccentric bottom steel outlet 2 at the lowest point by swinging the main body 1 with a small amplitude, thereby achieving higher production efficiency.

[0035] Furthermore, the wall steel tapping notch 3 is arranged at the edge of the wall 12 away from the arc-shaped portion 11. In this state, the wall steel tapping notch 3 has a relatively high height, so when it is necessary to pass through the wall steel tapping notch 3, due to the uneven bowl-shaped structure, when the body 1 performs a larger tilting movement, a smaller amount of steel tapping can appear in the wall steel tapping notch 3, thereby better realizing the control of extremely small amount of steel tapping.

[0036] Furthermore, the wall steel tapping notch 3 protrudes outward toward the side away from the body 1, so that the inner wall portion of the wall portion 12 at the position of the wall steel tapping notch 3 has a smooth wall surface. Through the above structure, the molten steel in the body 1 can be tapped more cleanly from the wall steel tapping notch 3, avoiding the unnecessary influence of the unnecessary structure on the flow of the molten steel in this embodiment.

[0037] Furthermore, the side wall portion 12 in the direction of the wall steel tapping notch 3 has a higher height, and the top position of the wall steel tapping notch 3 is matched with the top edge of the wall portion 12. Specifically, most of the wall steel tapping notches 3 are located at a position of more than half of the wall portion of one side of the wall steel tapping notch 3, so as to avoid that in this embodiment, when only passing through the eccentric bottom steel tapping port 2, part of the molten steel penetrates and remains inside the wall steel tapping notch 3, making the steel tapping incomplete. At the same time, the higher wall steel tapping notch 3 can also allow a smaller amount of steel to be tapped from the wall steel tapping notch 3 when the body 1 is tilted with a larger amplitude, so as to improve the tapping accuracy from the wall steel tapping notch 3 when the amount of steel tapped is extremely small.

[0038] In the above embodiment, the main body 1 can tap large amounts of high-speed, high-purity steel through the eccentric bottom steel tapping port 2, and can also tap smaller amounts of high-precision steel through the wall steel tapping slot 3. The entire process is completed with the same main body 1, which significantly improves the flexibility of the smelting process and meets different steel tapping requirements.

[0039] The present invention uses specific embodiments to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A lower furnace shell structure, characterized in that: include: A body, the body comprising an arc-shaped portion and a wall portion, the arc-shaped portion protrudes outward from the body, and the body can swing around a swing axis; An eccentric bottom steel outlet, wherein the eccentric bottom steel outlet is arranged on one side of the arc-shaped portion; The wall portion steel tapping notch is arranged on one side of the wall portion.

2. The lower furnace shell structure according to claim 1, characterized in that: The eccentric bottom steel outlet and the wall steel outlet notch are arranged together on one side of the swinging direction of the main body.

3. The lower furnace shell structure according to claim 1, characterized in that: The eccentric bottom steel outlet and the wall steel outlet notch both include a through hole structure with an opening and closing function.

4. The lower furnace shell structure according to claim 1, characterized in that: The eccentric bottom steel outlet is arranged at an edge position of the arc-shaped portion close to the wall portion.

5. The lower furnace shell structure according to claim 1, characterized in that: The wall steel outlet notch is arranged at an edge position of the wall away from the arc-shaped portion.

6. The lower furnace shell structure according to claim 1, characterized in that: The wall portion steel tapping notch protrudes outward toward a side away from the body, so that the inner wall portion of the wall portion at the position of the wall portion steel tapping notch has a smooth wall surface.

7. The lower furnace shell structure according to claim 6, characterized in that: The side of the wall portion steel outlet notch facing away from the body is connected with a plug rod or a sliding water outlet.

8. The lower furnace shell structure according to claim 1, characterized in that: The wall portion has a higher height on the side where the wall portion steel outlet notch is provided, and the top position of the wall portion steel outlet notch is consistent with the top edge of the wall portion.

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