Industrial silicon submerged arc furnace eye carbon brick anti-oxidation protection device
By setting a fixed plate and support frame around the carbon bricks in the furnace eye to form a cavity, and filling it with refractory bricks to isolate it from the outside air, the oxidation problem of the carbon bricks in the furnace eye is solved, ensuring the stability of the furnace body and the smooth discharge of molten silicon.
Patent Information
- Application Number
- CN202422918333.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-28
- Publication Date
- 2026-02-10
- Estimated Expiration
- 2034-11-28
AI Technical Summary
The carbon bricks in the furnace eye are prone to oxidation in a high-temperature and oxygen-rich environment, which leads to the formation of gaps, affects the flow of molten silicon, and causes adverse effects.
The structure employs a fixed plate and support frame to form a cavity that accommodates high-performance refractory bricks, isolating the furnace hole carbon bricks from contact with the outside air and preventing oxidation.
It effectively prevents oxidation of the carbon bricks in the furnace eye, avoids the outflow of molten silicon, and maintains the stability and continuity of the furnace body.
Smart Images
Figure CN223896582U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of industrial silicon technology, and in particular to an anti-oxidation protection device for carbon bricks in the borehole of an industrial silicon submerged arc furnace. Background Technology
[0002] The furnace eye is an indispensable part of the smelting process in an electric arc furnace. It ensures that the high-temperature melt produced by smelting (such as molten silicon and slag) can be smoothly discharged from the furnace, thereby maintaining the continuity and stability of the smelting process.
[0003] like Figure 5 As shown, the submerged arc furnace body mainly consists of an inner carbon brick layer and an outer shell 7. The outer shell 7 is made of one-piece molded stainless steel and has an opening 9. An aperture 8 is formed on the carbon brick layer of the furnace body, corresponding to the opening 9. The carbon bricks surrounding the aperture 8 are called aperture carbon bricks 6, which correspond to the opening 9. In the domestic industrial silicon submerged arc furnace production process, the aperture carbon bricks 6 are generally composed of graphite aperture carbon bricks, silicon carbide aperture carbon bricks, or carbon fiber aperture carbon bricks. During production, the temperature inside the furnace will reach over 1000℃, and the temperature of the aperture carbon bricks 6 will also rise accordingly. Because the furnace hole carbon brick 6 is exposed to high temperature and oxygen environment all year round, the furnace hole carbon brick 6 exposed to the outside of the furnace body will inevitably undergo oxidation reaction over time. Oxidation reaction will not only accelerate the aging and fatigue damage of the furnace hole 8 brick body, but also make the furnace hole 8 larger and create cavities or gaps inside or around the furnace hole 8. This will cause the high temperature silicon liquid inside the furnace body to flow out from the gaps in the furnace hole carbon brick 6 during the production process, causing a series of adverse effects. Utility Model Content
[0004] The purpose of this invention is to provide an anti-oxidation protection device for carbon bricks in the borehole of an industrial silicon submerged arc furnace, so as to solve the problems mentioned in the background art.
[0005] The technical solution adopted in this utility model is:
[0006] An anti-oxidation protection device for carbon bricks in the borehole of an industrial silicon submerged arc furnace, comprising:
[0007] The fixed plate has a slotted design that runs through the front and back.
[0008] A support frame is disposed on the fixed plate and located within a slot in the fixed plate;
[0009] in,
[0010] The carbon brick layer of the furnace body is provided with furnace holes, and the outer shell of the furnace body is provided with openings corresponding to the furnace holes. The shape of the fixing plate corresponds to the openings, and the edge of the fixing plate is connected to the openings.
[0011] The support frame extends along the Z-axis of the fixed plate to form a cavity that can accommodate the filler material, which isolates the furnace hole carbon bricks from the outside air.
[0012] Optionally, the filler is a high-performance refractory brick.
[0013] Optionally, the high-performance refractory brick is a composite corundum brick.
[0014] Optionally, filler material is poured onto the filler and between the filler and the support frame.
[0015] Optionally, the filler is corundum castable.
[0016] Optionally, a chute is provided at the lower end of the support frame, and the corundum casting material is poured on the chute.
[0017] Optionally, a gathering plate is provided at one end of the chute opening, and the corundum casting material is poured onto the gathering plate.
[0018] Optionally, the upper end of the support frame is provided with a door edge extending along the Z-axis direction of the fixed plate.
[0019] Optionally, the extension length of the support frame is 150mm.
[0020] Optionally, the fixing plate and the support frame are made of stainless steel.
[0021] Compared with the prior art, the beneficial effects of this utility model are:
[0022] In this invention, a fixing plate is installed on the outer shell of the furnace body, and a support frame is installed in a groove in the fixing plate. The support frame extends towards the Z-axis of the fixing plate, forming a cavity that can accommodate the composite corundum brick. Through the composite corundum brick, the fixing plate, and the support frame, the furnace eye carbon brick is isolated from the outside air, preventing direct contact between the furnace eye carbon brick and the outside air, thereby achieving the function of anti-oxidation protection for the furnace eye carbon brick. This solves the problem that furnace eye carbon bricks exposed to high temperature and oxygen environment for many years are prone to oxidation reaction, which leads to the leakage of high-temperature silicon liquid from the gaps in the furnace eye carbon brick, causing a series of adverse effects. Attached Figure Description
[0023] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0024] Figure 1 This is a schematic diagram of the overall structure of this application;
[0025] Figure 2 This is a schematic diagram showing the positional structure of the fixing plate, support frame, and door edge in this application;
[0026] Figure 3 This is a schematic diagram showing the positions and structures of the fixing plate, support frame, and chute in this application.
[0027] Figure 4 This is a schematic diagram of the structure of an embodiment of this application;
[0028] Figure 5 This is a schematic diagram of the prior art structure of this application.
[0029] Figure label:
[0030] 1. Fixed plate; 2. Support frame; 21. Accommodating cavity;
[0031] 3. Composite corundum bricks; 4. Door sills;
[0032] 5. Chute; 51. Chute edge; 52. Chute bottom; 53. Gathering plate;
[0033] 6. Furnace eye carbon brick; 7. Outer shell; 8. Furnace eye; 9. Opening. Detailed Implementation
[0034] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0035] Given that the existing furnace hole carbon bricks are exposed to high temperature and oxygen environment all year round, the furnace hole carbon bricks are very prone to oxidation reaction, which in turn causes the high temperature silicon liquid inside the furnace to flow out from the gaps in the furnace hole carbon bricks, causing a series of adverse effects.
[0036] like Figure 1-3As shown in the figure, this utility model embodiment provides an anti-oxidation protection device for carbon bricks in the furnace eye of an industrial silicon submerged arc furnace, which mainly consists of a fixed plate 1 and a support frame 2 set on the fixed plate 1.
[0037] The fixing plate 1 has a through slot formed at the front and back, and is set on the opening 9 of the outer shell 7. Its shape corresponds to the opening 9, and the edge of the fixing plate is connected to the opening 9. One end face of the fixing plate 1 is a planar structure, called the planar end face; the other end face is an arc-shaped structure, called the arc-shaped end face. The arc-shaped end face of the fixing plate 1 can fit completely against the outer shell 7.
[0038] In a preferred embodiment, the fixing plate 1 and the outer shell 7 can be connected by welding or other connection methods. The specific connection method is not limited in this embodiment.
[0039] As a preferred embodiment, the fixing plate 1 in this embodiment has a certain thickness, which can not only improve the fatigue resistance and durability of the fixing plate 1, but also enhance the overall rigidity and strength of the fixing plate 1.
[0040] Furthermore, the fixing plate 1 can be made of stainless steel, titanium, or other metals with fire-resistant properties.
[0041] In a preferred embodiment, the fixing plate 1 in this embodiment is made of stainless steel.
[0042] The support frame 2 and the fixing plate 1 can be integrally formed or connected by other means, as long as the support frame 2 and the fixing plate 1 can be fixedly connected. The support frame 2 is located at the grooved edge of the fixing plate 1. The frame of the support frame 2 extends along the Z-axis of the fixing plate 1, that is, it extends along the direction perpendicular to the plane end face of the fixing plate 1, forming a cavity 21 that can accommodate high-performance refractory bricks. The cavity 21 is filled with high-performance refractory bricks to isolate the furnace hole carbon brick 6 from the outside air, avoid direct contact between the furnace hole carbon brick 6 and the outside air, and thus achieve the function of anti-oxidation protection for the furnace hole carbon brick 6.
[0043] Furthermore, the support frame 2 can be made of stainless steel, titanium, or other metals with fire-resistant properties.
[0044] In a preferred embodiment, the support frame 2 is made of stainless steel.
[0045] As a preferred embodiment, the high-performance refractory brick in this embodiment is a composite corundum brick 3.
[0046] In a preferred embodiment, the sidewall extension length of the support frame 2 in this embodiment is approximately 150mm.
[0047] In specific operations, such as Figure 4 As shown, the fixing plate 1 is first fixed to the opening 9 of the outer shell 7 by welding. Then, the frame of the support frame 2 is fixed at the groove edge of the fixing plate 1. The frame extends about 150mm along the Z-axis of the fixing plate 1 to form a cavity 21. The cavity 21 contains a composite corundum brick 3 for isolating the furnace hole carbon brick 6 from the outside air. Through the composite corundum brick 3, the fixing plate 1 and the support frame 2, the furnace hole carbon brick 6 is isolated from the outside air, avoiding direct contact between the furnace hole carbon brick 6 and the outside air, thereby achieving the anti-oxidation protection function of the furnace hole carbon brick 6.
[0048] Furthermore, in order to further improve the insulation effect between the furnace hole carbon brick 6 and the outside air, corundum castable (not shown in the figure) can be poured into the gaps of the composite corundum brick 3 and the gap between the composite corundum brick 3 and the support frame 2. The corundum castable can achieve seamless filling of the gaps, further ensuring the insulation effect.
[0049] Furthermore, to prevent the hot, sparking molten silicon flowing out through the furnace bore 8 from damaging the outer casing 7 above the furnace bore 8, such as... Figure 2 As shown, a door edge 4 extending along the Z-axis of the fixing plate 1 is provided on the top edge of the support frame 2 and on the two side edges adjacent to the top edge, that is, the door edge 4 is flush with the edge of the support frame 2. The protruding door edge 4 blocks the high-temperature sparks moving upward through the furnace eye 8, thus preventing the high-temperature sparks from damaging the outer shell 7. Similarly, the door edge 4 in this embodiment can be made of stainless steel, titanium, or other metals with fire-resistant properties. Preferably, the door edge 4 is made of stainless steel.
[0050] Furthermore, in order to facilitate the discharge of molten silicon from inside the furnace to outside the furnace, a chute 5 for discharging molten silicon is provided on the bottom edge of the support frame 2 and on the two side edges adjacent to the bottom edge.
[0051] The specific structure is as follows: Figure 3 As shown, the edge 51 of the chute 5 is a plate-like structure with a certain slope, on which corundum castable is poured to improve the fire resistance and corrosion resistance of the edge 51. Similarly, the bottom 52 of the chute is also a plate-like structure, on which corundum castable is also poured to improve the fire resistance and corrosion resistance of the bottom 52.
[0052] Furthermore, in order to prevent the molten silicon flowing through the chute 5 from spreading outward, a gathering plate 53 is provided at the end of the chute edge 51 away from the support frame 2. Corundum casting material is also poured on the gathering plate 53. The gathering plate 53 concentrates the molten silicon that is spreading outward during the flow process into the same area and flows through the same area.
[0053] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A device for preventing oxidation of carbon bricks in the borehole of an industrial silicon submerged arc furnace, characterized in that, include: The fixed plate has a slotted design that runs through the front and back. A support frame is disposed on the fixed plate and located within a slot in the fixed plate; wherein, the carbon brick layer of the furnace body is provided with a furnace eye, and the outer shell of the furnace body is provided with an opening corresponding to the furnace eye; the shape of the fixed plate corresponds to the opening, and the edge of the fixed plate is connected to the opening; the support frame extends along the Z-axis direction of the fixed plate to form a receiving cavity that can accommodate filler material, thereby isolating the furnace eye carbon brick from the outside air through the filler material.
2. The anti-oxidation protection device for carbon bricks in the borehole of an industrial silicon submerged arc furnace according to claim 1, characterized in that, The filler is a high-performance refractory brick.
3. The anti-oxidation protection device for carbon bricks in the borehole of an industrial silicon submerged arc furnace according to claim 2, characterized in that, The high-performance refractory brick is a composite corundum brick.
4. The anti-oxidation protection device for carbon bricks in the borehole of an industrial silicon submerged arc furnace according to claim 1, characterized in that, A filler material is poured onto the filler and between the filler and the support frame.
5. The anti-oxidation protection device for carbon bricks in the borehole of an industrial silicon submerged arc furnace according to claim 4, characterized in that, The filler is corundum casting material.
6. The anti-oxidation protection device for carbon bricks in the borehole of an industrial silicon submerged arc furnace according to claim 5, characterized in that, A chute is provided at the lower end of the support frame, and the corundum casting material is poured onto the chute.
7. The anti-oxidation protection device for carbon bricks in the borehole of an industrial silicon submerged arc furnace according to claim 6, characterized in that, A gathering plate is provided at one end of the chute opening, and the corundum casting material is poured onto the gathering plate.
8. The anti-oxidation protection device for carbon bricks in the borehole of an industrial silicon submerged arc furnace according to claim 1, characterized in that, The upper end of the support frame is provided with a door edge extending along the Z-axis direction of the fixed plate.
9. The anti-oxidation protection device for carbon bricks in the borehole of an industrial silicon submerged arc furnace according to claim 1, characterized in that, The extension length of the support frame is 150mm.
10. The anti-oxidation protection device for carbon bricks in the borehole of an industrial silicon submerged arc furnace according to claim 1, characterized in that, The fixing plate and the support frame are made of stainless steel.