A multi-layered structure of silicon water-in-oil

Abstract

The utility model discloses a multilayer structure's silicon water is packed, includes: shell layer, shell layer is barrel -shaped structure, shell layer bottom and inboard surface have heat preservation layer, shell layer bottom shell layer upper portion has the bottom brick masonry layer of package, the bottom brick masonry layer middle part has the refining system connecting port of package, refining system connecting port penetrates shell layer bottom, refining system connecting port is connected with refining system, the heat preservation layer outside of shell layer inboard wall is provided with permanent layer and work layer in proper order, permanent layer and work layer are built with brick masonry, work layer and bottom brick masonry layer surface have protective layer, solve above -mentioned prior art's service life short and the technical problem of complex maintenance.

Description

Technical Field

[0001] This utility model belongs to the field of metallurgical technology, and in particular relates to a multi-layered silicon water bath. Background Technology

[0002] After industrial silicon smelting in an electric furnace, the molten silicon ladle serves as a high-temperature-resistant container to hold molten silicon exceeding 1600°C, ensuring the silicon remains uncontaminated. During the receiving and transfer of molten silicon, the ladle must minimize heat loss to prevent solidification and maintain fluidity for subsequent casting. Due to the special operating conditions of the molten silicon ladle, the requirements are very high. Existing molten silicon ladle technologies mostly consist of a metal shell filled with refractory material, whose structure is susceptible to corrosion during use, resulting in a short service life and difficult maintenance. Utility Model Content

[0003] The purpose of this invention is to provide a multi-layered silicon water package to solve the technical problems of short service life and complex maintenance in the prior art.

[0004] The technical solution adopted by this utility model to solve its technical problem is:

[0005] A multi-layered silica water package includes: an outer shell layer, the outer shell layer having a barrel-shaped structure; an insulation layer on the bottom and inner side of the outer shell layer; a bottom brick masonry layer on the upper part of the bottom of the outer shell layer; a refining system connection port in the middle of the bottom brick masonry layer; the refining system connection port penetrating the bottom of the outer shell layer and connected to a refining system; a permanent layer and a working layer sequentially disposed on the outer side of the insulation layer on the inner sidewall of the outer shell layer; the permanent layer and the working layer being constructed of bricks; and a protective layer on the surface of the working layer and the bottom brick masonry layer.

[0006] The present invention relates to a multi-layered silica water package, wherein the protective layer is a mortar coating.

[0007] The present invention relates to a multi-layered silicon water package, wherein the permanent layer, working layer and protective layer are all made of aluminum silicon carbide.

[0008] This utility model discloses a multi-layered silica water bag, wherein the bottom brick masonry layer consists of 4-6 layers, each layer is staggered and rotated at a 30-60 degree angle, and the staggered joint of each layer is not less than 1 / 4 of the brick length.

[0009] The present invention relates to a multi-layered silicon water package, wherein the bottom of the insulation layer at the bottom of the outer shell layer has a bottom leveling layer, which is cast at the bottom of the outer shell layer.

[0010] The present invention relates to a multi-layered silicon water tank, wherein the highest point of the refining system connection port is higher than the top surface of the bottom brick masonry layer of the tank.

[0011] This utility model discloses a multi-layered silicon water tank, wherein the refining system connection port includes several vertically arranged venting steel pipes, and the outside of the venting steel pipes is filled with tank bottom packing.

[0012] This utility model discloses a multi-layered silica water package, wherein the permanent layer and the working layer are staggered with the bottom brick masonry layer in a stepped manner at the intersection, and the bottom brick masonry layer is located on the inner side at the intersection of the permanent layer and the working layer with the bottom brick masonry layer.

[0013] This invention relates to a multi-layered silica water package, wherein the working layer consists of curved trapezoidal bricks.

[0014] The beneficial effects of this utility model are as follows: It proposes a multi-layered silica water tank, which uses carbon bricks made of aluminum silicon carbide to construct the permanent layer and the working layer, thereby improving the silica tank's high-temperature resistance, slag erosion resistance, erosion resistance, and thermal shock resistance. Furthermore, the two-layer structure of the permanent layer and the working layer means that only the working layer needs to be replaced or modified during maintenance, which improves the convenience of maintenance and reduces maintenance costs. By improving the shape of the working layer bricks, it ensures that during high-temperature use, it is not prone to peeling or falling off due to expansion and contraction, or brick falling off or silica water seepage and leakage accidents caused by excessively large brick joints. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings:

[0016] Figure 1 This is a schematic diagram of an embodiment of the present utility model. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0018] like Figure 1As shown, a multi-layered silica water package includes: an outer shell layer 100, which has a barrel-shaped structure; an insulation layer 200 on the bottom and inner side of the outer shell layer 100; a bottom brick masonry layer 500 on the upper part of the bottom of the outer shell layer 100; a refining system connection port 400 in the middle of the bottom brick masonry layer 500; the refining system connection port 400 penetrates the bottom of the outer shell layer 100 and is connected to the refining system; a permanent layer 600 and a working layer 700 are sequentially arranged on the outer side of the insulation layer 200 on the inner sidewall of the outer shell layer 100; the permanent layer 600 and the working layer 700 are constructed of bricks; and a protective layer 800 is provided on the surface of the working layer 700 and the bottom brick masonry layer 500.

[0019] It should be noted that the outer shell layer 100 is typically made of high-temperature resistant alloy steel, constructed from 16mm thick steel plates, serving as the load-bearing framework of the silica water tank, supporting the refractory lining and the weight of the silica water. It has lifting lugs at the top and tilting lugs at the bottom, cooperating with a crane for transport and tilting. This structure is the same as in existing technology and is not shown in the figure. A hole is left at the center of the bottom to form the refining system connection port 400, for installing the refining system and introducing oxygen during the refining process. The working layer 700, in direct contact with the molten silica water, directly determines the quality and service life of the silica water tank. As a consumable layer, the working layer 700 is a key focus of silica water tank maintenance. The permanent layer 600, located between the working layer 700 and the outer shell layer 100, primarily buffers thermal stress and reduces heat conduction to the steel shell, allowing for longer service life compared to the working layer 700.

[0020] Protective layer: Located outside the working layer, it is in direct contact with the molten silicon and is consumed quickly. Its main function is to protect the working layer, reduce its consumption, and extend the service life of the silicon water package.

[0021] The main process is as follows: steel shell acceptance → shell cleaning → asbestos board laying → bottom cladding construction → permanent wall cladding construction → working wall cladding construction → edge cladding pouring → protective layer pouring → distributor installation → bottom cladding pouring → cladding baking → online use.

[0022] The insulation layer 200 consists of 2 asbestos boards. The asbestos boards are cut according to the bottom dimensions of the package. A 10mm layer of asbestos board is then bonded with high-alumina refractory mortar, ensuring it is laid tightly and that the overlaps are staggered by more than 50mm.

[0023] The bottom layer of brickwork is 500mm thick, constructed using a wet-laying method. High-alumina mortar is used to lay the refractory bricks evenly. Five layers of the bottom layer are laid flat, each layer with staggered joints and a 30-60° rotation angle. The staggered joint length of each layer should be no less than 1 / 4 of the brick length. Overlapping joints are not allowed, and the joints between bricks and layers should not exceed 2mm. The mortar must be fully applied. A spirit level is used to control the surface flatness during construction to prevent misalignment. A 350*350mm square hole is pre-drilled in the center of each layer for installing a distributor. A serrated gap is left along the circumference of the bottom layer, and corundum castable is poured symmetrically and tamped in layers until all five layers are completed.

[0024] Construction of the permanent 700mm layer: Starting from the 5th layer of the 500mm base brickwork, use high-alumina refractory mortar to lay the refractory bricks of the permanent 700mm layer vertically, building ring by ring in the vertical direction to the top, leaving a gap of about 50mm between the refractory bricks and the pressure plate. Refractory bricks are not allowed to directly press against the steel plate. During construction, bricks should be tightly fitted together, with gaps no greater than 2mm. The mortar must be fully applied, and each layer of bricks should be laid with staggered joints.

[0025] After the permanent layer is laid, the inner layer of refractory bricks for the wall is laid, using a side-mounted method, building upwards in concentric rings. The layers are laid with staggered joints, and the inner layer bricks must also be laid with staggered joints from the permanent layer.

[0026] Dry-laying is used within the same layer, with bricks laid tightly together, and the joints no greater than 1mm. The finishing bricks are processed into a wedge shape, with a thickness no less than half the thickness of the whole brick. One to three wedges can be processed and evenly staggered, then tapped into place with a rubber mallet to ensure the stability of each ring of bricks, preventing any loosening. After each layer is laid, it is pried tight radially with a pry bar. Permanent gaps between working layers are filled tightly with aluminum silicon carbide. The layers are then wet-laid with refractory mortar, with joints no greater than 1mm and the mortar fully applied.

[0027] The baking process for the silicon water bath involves placing the silicon water bath in the oven for 12 hours after its construction to ensure the stability of the material properties within. The silicon block baking temperature must reach a maximum of 900 degrees Celsius. The initial baking time is as follows: low heat baking for 4 hours at room temperature, then gradually increasing to 110 degrees Celsius and holding for 20 hours; center baking for 4 hours, increasing to 300 degrees Celsius and holding for 10 hours; high heat baking for 4 hours, increasing to 600 degrees Celsius and holding for 10 hours; then increasing to 900 degrees Celsius and holding for 8 hours. Once the required temperature and baking time are achieved, baking is stopped, and the product is ready for use.

[0028] In a preferred embodiment of this utility model, the protective layer 800 is a mortar coating.

[0029] In a preferred embodiment of this invention, the permanent layer 600, the working layer 700, and the protective layer 800 are all made of silicon carbide. Silicon carbide carbon bricks are high-performance refractory bricks specifically designed for use in silicon-silicon water baths in the smelting industry, combining the advantages of alumina, silicon carbide, and graphite. Compared to traditional high-alumina bricks, silicon carbide carbon bricks exhibit significantly improved high-temperature resistance, slag erosion resistance, erosion resistance, and thermal shock resistance. Antioxidants are added to the bricks to prevent oxidation and contamination of the silicon water purity. Significant improvements and adjustments have also been made to the brick type and construction method to ensure that during high-temperature use, expansion and contraction can prevent chipping or excessively large gaps between bricks, thus minimizing the risk of brick falling and silicon water leakage.

[0030] The protective layer 800 is set by uniformly applying a layer of curing refractory to the outer wall of the inner brick, with a thickness of 10-20mm and a smooth surface.

[0031] In a preferred embodiment of this utility model, the number of layers of the bottom brick masonry layer 500 is 4-6 layers, each layer is staggered and rotated 30-60 degrees, and the staggered joint of each layer is not less than 1 / 4 brick length.

[0032] In a preferred embodiment of the present invention, the bottom of the insulation layer 200 at the bottom of the outer shell layer 100 has a bottom leveling layer 300, which is cast into the bottom of the outer shell layer 100.

[0033] In a preferred embodiment of this utility model, the highest point of the refining system connection port 400 is higher than the top surface of the bottom brick masonry layer 500.

[0034] In a preferred embodiment of the present invention, the refining system connection port 400 includes a plurality of vertically arranged ventilation steel pipes 410, and the ventilation steel pipes 410 are coated with bottom filler 420.

[0035] In a preferred embodiment of this utility model, the permanent layer 600 and the working layer 700 are staggered in a stepped manner at the intersection with the bottom brick masonry layer 500, and the bottom brick masonry layer 500 is located on the inner side at the intersection with the permanent layer 600 and the working layer 700.

[0036] In a preferred embodiment of this utility model, the bricks of the working layer 700 are curved trapezoidal bricks.

[0037] T-shaped bricks alter the shape and size of the bricks. Compared to refractory bricks of traditional sizes, silica water bags constructed with T-shaped bricks naturally form interlocking contact surfaces between the bricks, resulting in a tighter fit between them and effectively preventing the risk of bricks falling off. The number of brick joints is reduced by 1 / 3, which effectively slows down the oxidation rate from the brick joints, increases the overall service life of the silica water bag, and effectively reduces the risk of silica leakage caused by numerous brick joints.

[0038] The inner layer of the wall is constructed using T-shaped bricks laid vertically with refractory mortar, in a wet-laying manner, ring by ring. The gap between bricks should not exceed 1mm, and the gap between layers should not exceed 2mm. Layers should be laid with staggered joints, and triangular joints are not permitted. The inner layer and the permanent layer should also be staggered. At the end of each layer, T-shaped bricks with a width of not less than 50mm should be processed. If one brick is insufficient, two bricks can be used, arranged symmetrically. The end of each layer should be staggered by at least three bricks from the adjacent layers. After each layer is completed, it should be pried tight radially with a pry bar. The gap between the inner layer and the permanent layer should be filled tightly with aluminum silicon carbide filler. After compaction, a thin layer of refractory mortar should be applied to the brick surface. T-shaped bricks are only used for the working layer of the silica water-filled chamber; the construction process and requirements for other parts remain unchanged.

[0039] Compared to high-alumina bricks, silicon carbide bricks have a higher density, while silicon carbide has high erosion resistance and a longer service life.

[0040] The carbon in silicon carbide is heat-resistant, and when combined with aluminum oxide, the refractoriness reaches 1790℃, and the load softening start temperature reaches 1500℃. It is more heat-resistant and durable than high-alumina bricks, which gradually brittle at high temperatures.

[0041] Applying a 20mm layer of aluminum silicon carbide curing castable to the surface of the aluminum silicon carbide brick can further extend the service life of the silicon water tank.

[0042] The service life of silicon water tanks constructed using silicon carbide aluminum bricks and silicon carbide aluminum curing materials is more than three times that of silicon water tanks constructed using high-alumina bricks. This facilitates the turnover of silicon water tanks in production and makes production scheduling easier.

[0043] The vertical brick joints of the wall are reduced by 1 / 3, which reduces the risk of leakage from the brick joints. At the same time, the brick joints between the trapezoidal bricks fit more tightly, reducing safety risks.

[0044] Aluminum fire mortar was added between the horizontal brick joints of the wall, creating a seamless connection. Combining points 1 and 2, this improves the resistance to erosion and scouring of the brick joints by the high-temperature silica water, thus extending service life and safety.

[0045] The total thickness of the bottom is 390mm, and the height of the copper tube of the distributor is 450mm, which is 60mm higher than the plane of the corundum castable. During construction, the corundum castable is compacted more tightly, making it more resistant to corrosion and erosion, and extending its service life. At the same time, it avoids air leakage from the gaps in the castable when supplying oxygen.

[0046] Applying a 20mm thick layer of curing material to the surface of the trapezoidal bricks protects them from oxidation and erosion at high temperatures, extending the overall lifespan of the silica water tank. Later repairs only require maintenance of the curing material, significantly reducing the need for repairs to the bricks themselves. The new curing material should be inspected after three refining cycles; any peeling or damage should be repaired. The curing material is ready for use after baking at 300℃ for one hour, facilitating the turnover of silica water tanks and simplifying production scheduling.

[0047] In the description of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They 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, and therefore should not be construed as a limitation on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0048] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0049] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A multilayered silicon water package, characterized in that, include: The outer shell layer (100) has a barrel-shaped structure. The bottom and inner side of the outer shell layer (100) have insulation layers (200). The upper part of the bottom of the outer shell layer (100) has a bottom brick masonry layer (500). The middle part of the bottom brick masonry layer (500) has a refining system connection port (400). The refining system connection port (400) penetrates the bottom of the outer shell layer (100) and is connected to the refining system. The outer side of the insulation layer (200) on the inner wall of the outer shell layer (100) is provided with a permanent layer (600) and a working layer (700). The permanent layer (600) and the working layer (700) are made of bricks. The surface of the working layer (700) and the bottom brick masonry layer (500) has a protective layer (800).

2. The multilayer silicon water package according to claim 1, characterized in that, The protective layer (800) is a mortar coating.

3. The multilayer silicon water package according to claim 1, characterized in that, The permanent layer (600), working layer (700) and protective layer (800) are all made of aluminum silicon carbide.

4. The multilayer silicon water package according to claim 1, characterized in that, The number of layers of the bottom brick masonry layer (500) is 4-6, with each layer staggered and rotated 30-60 degrees at an angle, and the staggered joint of each layer is not less than 1 / 4 of the brick length.

5. A multilayered silicon water package according to claim 1, characterized in that, The bottom of the insulation layer (200) at the bottom of the outer shell layer (100) has a bottom leveling layer (300), which is cast at the bottom of the outer shell layer (100).

6. The multilayer silicon water package according to claim 1, characterized in that, The highest point of the refining system connection port (400) is higher than the top surface of the bottom brick masonry layer (500).

7. A multilayer silicon water package according to claim 6, characterized in that, The refining system connection port (400) includes several vertically arranged ventilation steel pipes (410), and the ventilation steel pipes (410) are filled with bottom filler (420).

8. A multilayer silicon water package according to claim 1, characterized in that, The permanent layer (600) and the working layer (700) are staggered with the bottom brick masonry layer (500) in a stepped manner at the intersection of the permanent layer (600) and the working layer (700) with the bottom brick masonry layer (500), and the bottom brick masonry layer (500) is located on the inner side at the intersection of the permanent layer (600) and the working layer (700) with the bottom brick masonry layer (500).

9. A multilayered silicon water package according to claim 1, characterized in that, The bricks in the working layer (700) are curved trapezoidal bricks.

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