Ingot mold

Abstract

The embodiment of the utility model provides an ingot mold. The ingot mold comprises a bottom mold, and the bottom mold forms the bottom of the ingot mold; the side mold is arranged around the bottom mold to form the side edge of the ingot mold; the side die and the bottom die form an accommodating space; the protection die is arranged above the bottom die so as to protect the bottom die; the protection mold comprises a first protection mold layer and a second protection mold layer; the first protective mold layer and the second protective mold layer are both formed by paving brick-shaped materials; and the material is a high-temperature-resistant material. According to the embodiment of the invention, the brick-shaped materials are paved into the two protection mold layers, so that maintenance can be performed by replacing individual bricks under the condition that partial area in the upper protection mold layer is abraded, and the maintenance cost is reduced.

Description

Technical Field

[0001] This application relates to the field of casting technology, and particularly to an ingot mold. Background Art

[0002] Silicon is the core material for manufacturing solar photovoltaic cells. During the silicon manufacturing process, industrial silicon melt needs to be poured into an ingot mold for casting. The temperature of the silicon melt > 1500°C, and the currently commonly used heat-resistant cast iron ingot mold can withstand temperatures of about 1400°C. When the high-temperature silicon melt is poured into the ingot mold, it scours the bottom of the ingot mold, easily causing the iron melting phenomenon, resulting in the bottom being burned through, increasing the cost of equipment maintenance. Utility Model Content

[0003] Embodiments of this application provide an ingot mold to solve or alleviate one or more technical problems in the prior art.

[0004] An ingot mold provided by an embodiment of this application includes:

[0005] A bottom mold that forms the bottom of the ingot mold;

[0006] A side mold that is arranged around the bottom mold to form the side of the ingot mold; the side mold and the bottom mold form an accommodation space;

[0007] A protection mold that is arranged above the bottom mold to protect the bottom mold; the protection mold includes a first protection mold layer and a second protection mold layer; both the first protection mold layer and the second protection mold layer are paved with brick-shaped materials; the material is a high-temperature resistant material.

[0008] In one embodiment, both the first protection mold layer and the second protection mold layer include multiple rows of bricks;

[0009] In one row of bricks, a block splicing line is formed between two adjacent bricks;

[0010] In the first protection mold layer and the second protection mold layer, the block splicing lines of adjacent rows of bricks are staggered in paving.

[0011] In one embodiment, in multiple rows of bricks, a row splicing line is formed between two adjacent rows of bricks;

[0012] The row splicing line of the first protection mold layer and the row splicing line of the second protection mold layer are staggered in paving.

[0013] In one embodiment, the heights of the first protection mold layer and the second protection mold layer are equal.

[0014] In one embodiment, the first protection mold layer is paved above the second protection mold layer;

[0015] The height of the first protection mold layer is lower than the height of the second protection mold layer.

[0016] In one embodiment, the first protective mold layer is laid above the second protective mold layer;

[0017] In the first protective mold layer, the height of the bricks near the side mold is lower than the height of the bricks near the side away from the side mold;

[0018] Correspondingly, in the second protective mold layer, the height of the bricks near the side mold is higher than the height of the bricks near the side away from the side mold.

[0019] In one embodiment, the first protective mold layer is laid above the second protective mold layer, and the bricks include stepped bricks;

[0020] Using stepped bricks, such that:

[0021] In the first protective mold layer, the height of the bricks near the side mold is lower than the height of the bricks near the side away from the side mold;

[0022] Correspondingly, in the second protective mold layer, the height of the bricks near the side mold is higher than the height of the bricks near the side away from the side mold.

[0023] In one embodiment, the height of the bricks is 60 - 80 mm.

[0024] In one embodiment, the length of the whole brick of the bricks is 1 / 20 - 1 / 8 of the length of the bottom mold; the width of the whole brick of the bricks is 1 / 20 - 1 / 8 of the width of the bottom mold.

[0025] In one embodiment, it further includes:

[0026] A silicon slag layer, which is paved by silicon slag and covers the protective mold; the laying height of the silicon slag near the side mold is lower than the laying height of the silicon slag away from the side mold.

[0027] In one embodiment, the laying height of the silicon slag near the side mold is: 12 - 20 mm;

[0028] The laying height of the silicon slag away from the side mold is 6 - 12 mm.

[0029] In the embodiment of the present application, two layers of protective mold layers are paved with brick-shaped materials, so that when part of the upper protective mold layer is worn, it can be maintained by replacing individual bricks, reducing the maintenance cost.

[0030] The above summary is only for the purpose of the specification and is not intended to be limiting in any way. In addition to the above-described illustrative aspects, embodiments, and features, further aspects, embodiments, and features of the present application will be readily apparent by reference to the drawings and the following detailed description. Description of the Drawings

[0031] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the several views denote the same or similar components or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings depict only some embodiments disclosed in accordance with the present application and should not be regarded as limiting the scope of the present application.

[0032] Figure 1 Shows a side cross-sectional view of an ingot mold according to an embodiment of the present application.

[0033] Figure 2 Shows another side cross-sectional view of an ingot mold according to an embodiment of the present application.

[0034] Figure 3 Shows another side cross-sectional view of an ingot mold according to an embodiment of the present application.

[0035] Figure 4 Shows a schematic structural view of a brick according to an embodiment of the present application.

[0036] Figure 5 Shows another schematic structural view of a brick according to an embodiment of the present application.

[0037] Figure 6 Shows yet another schematic structural view of a brick according to an embodiment of the present application. Detailed Description of the Embodiments

[0038] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the present application. Therefore, the drawings and the description are to be regarded as illustrative rather than restrictive in nature.

[0039] Figure 1 Shows a side cross-sectional view of an ingot mold according to an embodiment of the present application. Figure 2 Shows another side cross-sectional view of an ingot mold according to an embodiment of the present application. Figure 3 Shows another side cross-sectional view of an ingot mold according to an embodiment of the present application. As Figures 1-3 shown, the ingot mold includes a bottom mold 100, a side mold 200, and a protective mold 300.

[0040] Among them, the bottom mold 100 forms the bottom of the ingot mold, and the side mold 200 is disposed around the bottom mold 100 to form the side of the ingot mold; the side mold 200 and the bottom mold 100 form an accommodation space.

[0041] The accommodation space can be a square barrel shape, a circular barrel shape, a conical shape, or an irregular barrel shape.

[0042] The side mold 200 and the bottom form an accommodation space with an opening on the upper side, which can be used for pouring silicon water. The material of the side mold 200 can be made of various materials or various solutions known to those of ordinary skill in the art now and in the future.

[0043] When pouring silicon water, the high-temperature silicon water first contacts the bottom of the accommodation space and then flows from the bottom to the side mold 200. Therefore, during this process, the bottom is washed more severely and bears the highest temperature, making the bottom mold 100 prone to wear or burn-through.

[0044] To avoid frequent replacement of the bottom mold 100, which increases the maintenance cost, it is necessary to protect the bottom mold 100.

[0045] In the embodiment of the present application, a protection mold 300 is provided above the bottom mold 100 to protect the bottom mold 100.

[0046] In the embodiment of the present application, the protection mold 300 is arranged above the bottom mold 100; the protection mold 300 includes a first protection mold layer 310 and a second protection mold layer 320; both the first protection mold layer 310 and the second protection mold layer 320 are paved with materials in the shape of bricks 303; the material is a high-temperature resistant material.

[0047] In the embodiment of the present application, the high-temperature resistant material can be silicon nitride bonded silicon carbide material or high-aluminum material.

[0048] The temperature resistance of silicon nitride bonded silicon carbide material is usually above 1500 °C, and can even reach above 2000 °C. The protection mold 300 is made of silicon nitride bonded silicon carbide material with a temperature resistance higher than that of silicon water, which can avoid the phenomenon of iron melting during the casting process, thereby improving the quality of silicon products and having a higher purity.

[0049] In the embodiment of the present application, the two-layer protection mold 300 layer is paved with materials in the shape of bricks 303, so that when a part of the upper protection mold 300 layer is worn, it can be maintained by replacing individual bricks 303, reducing the maintenance cost.

[0050] In the embodiment of the present application, both the first protection mold layer 310 and the second protection mold layer 320 are paved with materials in the shape of bricks 303, which can also avoid the situation of mold layer cracking.

[0051] In one embodiment, as Figure 2 and Figure 3 shown, in both the first protection mold layer 310 and the second protection mold layer 320, there are multiple rows of bricks 303; the multiple bricks 303 are paved row by row to form the first protection mold layer 310 or the second protection mold layer 320.

[0052] In a row of bricks 303, a block joint line 301 is formed between two adjacent bricks 303; the block joint lines 301 of two adjacent rows of bricks 303 are staggeredly laid. As Figure 3 shown, a row of bricks 303 is arranged in a row along the vertical direction and is arranged in multiple rows from left to right in sequence. The block joint lines 301 of two adjacent rows of bricks 303 are staggeredly laid.

[0053] In the first protective mold layer 310 and the second protective mold layer 320, the block joint lines 301 of two adjacent rows of bricks 303 are staggeredly laid, which can prevent silicone water from seeping into the bottom mold 100, further protect the bottom mold 100, and extend the service life of the bottom mold 100.

[0054] In the embodiment of the present application, by staggering the laying of the block joint lines 301 of two adjacent rows of bricks 303 in the first protective mold layer 310 and the second protective mold layer 320, silicone water can be prevented from seeping into the bottom mold 100, further protecting the bottom mold 100 and extending the service life of the bottom mold 100.

[0055] In one implementation manner, referring to Figure 1 , in multiple rows of bricks 303, a row joint line 302 is formed between two adjacent rows of bricks 303; the row joint line 302 of the first protective mold layer 310 and the row joint line 302 of the second protective mold layer 320 are staggeredly laid.

[0056] If there are N rows of bricks 303 in the first protective mold layer 310, then N - 1 row joint lines 302 will be formed. N is a positive integer greater than or equal to 2.

[0057] In the embodiment of the present application, by staggering the laying of the row joint line 302 of the first protective mold layer 310 and the row joint line 302 of the second protective mold layer 320, silicone water can be further prevented from seeping into the bottom mold 100, protecting the bottom mold 100 and extending the service life of the bottom mold 100.

[0058] In one implementation manner, the first protective mold layer 310 and the second protective mold layer 320 have the same height.

[0059] The first protective mold layer 310 and the second protective mold layer 320 have the same height. Then, in the case of no special necessity, the whole brick shapes of the first protective mold layer 310 and the second protective mold layer 320 for laying bricks 303 are the same, that is, the length, width and height are all equal.

[0060] The first protective mold layer 310 and the second protective mold layer 320 are laid with whole bricks of the same shape and size, which can make it more convenient and lower-cost to obtain replacement bricks 303 when replacing the worn bricks 303, without specially preparing replacement bricks 303, reducing the maintenance difficulty and the maintenance cost.

[0061] In one embodiment, the first protective die layer 310 is laid above the second protective die layer 320; the height of the first protective die layer 310 is lower than that of the second protective die layer 320.

[0062] During the process of pouring silicon water, the silicon water comes into contact with the upper first protective die layer 310 more. Therefore, the first protective die layer 310 is a die layer that is easily washed away and worn. When the bricks 303 need to be replaced, it is basically the bricks 303 of the first protective die layer 310 that are replaced.

[0063] In the embodiment of the present application, by setting the height of the first protective die layer 310 to be lower than that of the second protective die layer 320, when replacing the bricks 303, the materials occupied by the bricks 303 are less, reducing the material cost of replacing the bricks 303. Further reducing the maintenance cost of the ingot mold.

[0064] In one embodiment, the first protective die layer 310 is laid above the second protective die layer 320; the height of the first protective die layer 310 is higher than that of the second protective die layer 320. This embodiment can be selected according to specific application scenarios in actual applications. For this way of laying, since the second protective die layer 320 located below is used to protect the bottom die 100, and the first protective die layer 310 located above bears the scouring of the silicon water, when the bricks 303 are worn to a height lower than a specific height, they need to be replaced. Therefore, by increasing the height of the first protective die layer 310, the frequency of replacing the bricks 303 can also be reduced, reducing labor costs and maintenance costs.

[0065] In one embodiment, the first protective die layer 310 is laid above the second protective die layer 320; in the first protective die layer 310, the height of the bricks 303 near the side die 200 is lower than the height of the bricks 303 near the side opposite to the side die 200; correspondingly, in the second protective die layer 320, the height of the bricks 303 near the side die 200 is higher than the height of the bricks 303 near the side opposite to the side die 200.

[0066] In the embodiment of the present application, since the bricks 303 opposite to the side die 200, that is, the bricks 303 located at the central position, are subjected to more scouring than the bricks 303 near the side die 200, they are more easily worn. By setting the height of the bricks 303 near the side die 200 in the first protective die layer 310 to be lower than the height of the bricks 303 near the side opposite to the side die 200, the bricks 303 opposite to the side die 200 can be made more wear-resistant, extending their service life and reducing the replacement frequency.

[0067] Accordingly, in the second protective mold layer 320, the height of the brick 303 near the side mold 200 is higher than the height of the brick 303 near the side away from the side mold 200, which can keep the first protective mold layer 310 and the second protective mold layer 320 flat after paving.

[0068] In one embodiment, the first protective mold layer 310 is paved above the second protective mold layer 320, and the brick 303 includes a stepped brick 303; by using the stepped brick 303, it is such that:

[0069] In the first protective mold layer 310, the height of the brick 303 near the side mold 200 is lower than the height of the brick 303 near the side away from the side mold 200;

[0070] Accordingly, in the second protective mold layer 320, the height of the brick 303 near the side mold 200 is higher than the height of the brick 303 near the side away from the side mold 200.

[0071] In the embodiment of the present application, since the block splicing lines 301 of adjacent two rows of bricks 303 are staggeredly paved, and the row splicing lines 302 of the first protective mold layer 310 and the second protective mold layer 320 are staggeredly paved, so that when the heights of the bricks 303 in the first protective mold layer 310 are different, it is necessary to make up for it with the stepped bricks 303, so as to keep the first protective mold layer 310 and the second protective mold layer 320 flat after paving.

[0072] Exemplarily, the shape of the brick 303 in the embodiment of the present application can be Figures 4-6 one or more of those shown in Figure 4 The brick 3031 in Figure 5 is a long strip-shaped ordinary brick 3031; the stepped brick 303 can be Figure 6 the brick 3032 of the shape shown in

[0073] or the brick 3033 of the shape shown in

[0074] In actual application, it can be selected according to the actual situation.

[0075] In a specific application scenario, stepped bricks 303 of other shapes or other sizes can also be used. The size shown in the figure does not represent a limitation on the size ratio, but is only for illustrative purposes.

[0076] In one example, when the brick 303 is corroded to a height less than or equal to 50 mm, it needs to be replaced. Correspondingly, the height of the brick 303 can be 72 mm, or any value between 65 - 76 mm.

[0077] The height of the brick 303 can refer to the length value along the direction towards the opening when the brick 303 is laid on the bottom mold 100.

[0078] In one embodiment, the length of the whole brick of the brick 303 is 1 / 20 - 1 / 8 of the length of the bottom mold 100; the width of the whole brick of the brick 303 is 1 / 20 - 1 / 8 of the width of the bottom mold 100.

[0079] If the length or width of the brick 303 is too short, it will be time-consuming and laborious during paving, and it is easy to penetrate silicon water, which is not conducive to protecting the bottom mold 100.

[0080] At the same time, if the length or width of the brick 303 is too long, the cost of replacing the brick 303 will increase.

[0081] The length or width of the whole brick of the brick 303 can be the length or width when the brick 303 is not cut. It can be understood that in the above staggered paving method, in order to make the first protective mold layer 310 / second protective mold layer 320 cooperate with the side mold 200, the outermost brick 303 may be smaller than the size of the whole brick.

[0082] Based on this, in the embodiment of the present application, the length of the whole brick of the brick 303 is 1 / 20 - 1 / 8 of the length of the bottom mold 100; the width of the whole brick of the brick 303 is 1 / 20 - 1 / 8 of the width of the bottom mold 100.

[0083] In one embodiment, the ingot mold of the embodiment of the present application further includes a silicon slag layer 400. The silicon slag layer 400 is paved with silicon slag and covers the protective mold 300; the laying height of the silicon slag near the side mold 200 is lower than the laying height of the silicon slag away from the side mold 200.

[0084] The crushed slag in the silicon slag layer 400 is fused with the silicon water during the pouring process of the silicon water and is extracted into silicon products. By laying the silicon slag layer 400, the silicon slag layer 400 can be used as the first layer in contact with the silicon water, avoiding the newly poured silicon water from directly contacting the protective mold 300. Since the temperature of the newly poured silicon water is the highest and will slowly cool down in the ingot mold, by making the silicon slag layer 400 contact the silicon water first, it can protect the protective mold 300, reduce the frequency of silicon brick replacement, and reduce the maintenance cost.

[0085] The laying height of the silicon slag near the side mold 200 is lower than that of the silicon slag away from the side mold 200. The reason is that the position away from the side mold 200 first contacts the silicon water and is subject to a greater scouring force of the silicon water. Therefore, in the case of a specific amount of silicon slag, laying more silicon slag at the position away from the side mold 200 can further protect the protection mold 300, reduce the frequency of silicon brick replacement, and lower the maintenance cost.

[0086] In one embodiment, the laying height of the silicon slag near the side mold 200 is 12 - 20 mm; the laying height of the silicon slag away from the side mold 200 is 6 - 12 mm. If the silicon slag layer 400 is laid too low, the protection mold 300 layer cannot be protected; if it is laid too high, the efficiency of silicon water pouring will be affected. Therefore, through the above height setting, it is ensured that the height of the silicon slag layer 400 can achieve the effect of protecting the protection mold 300 layer while improving the silicon water pouring efficiency.

[0087] In one embodiment, between the lower part of the second protection mold layer 320 and above the bottom mold 100, that is, between the second protection mold layer 320 and the bottom mold 100, a layer of aluminosilicate rock wool and asbestos board 500 is laid. The aluminosilicate rock wool and asbestos board layer 500 is made of a soft material, which can facilitate the leveling of the laying of the bricks 303. On the other hand, the aluminosilicate rock wool and asbestos board have a heat insulation effect, which can isolate the heat transfer between the second protection mold layer 320 and the bottom mold 100, further protect the bottom mold 100, and improve the service life of the ingot mold.

[0088] In one embodiment, reinforcing ribs 700 are laid below the bottom mold 100. It can facilitate the heat dissipation of the bottom mold 100, further protect the bottom mold 100, and extend the service life of the ingot mold.

[0089] In one embodiment, the ingot mold further includes a plug 600. The side mold 200 is provided with a notch adapted to the plug 600. The plug 600 blocks the notch. When the silicon water pouring is completed, the plug 600 is removed to facilitate the removal of the poured silicon block.

[0090] Furthermore, in order to facilitate the removal of the plug 600, a lifting lug 610 can be provided above the plug 600 to facilitate the removal of the plug 600.

[0091] The other components of the ingot mold in the above embodiments can adopt various technical solutions known to those of ordinary skill in the art now and in the future, which will not be described in detail here.

[0092] In the description of this specification, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to this application.

[0093] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this application, "a plurality" means two or more unless otherwise specifically defined.

[0094] In this application, unless otherwise clearly specified and defined, terms such as "mounted", "connected", "coupled", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or a communication connection; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0095] In this application, unless otherwise clearly specified and defined, the "upper" or "lower" of the first feature with respect to the second feature may include direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the "above", "over" and "on" of the first feature with respect to the second feature include that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The "below", "beneath" and "under" of the first feature with respect to the second feature include that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0096] The foregoing disclosure provides many different embodiments or examples for implementing different structures of the present application. To simplify the disclosure of the present application, the components and settings of specific examples are described above. Of course, they are merely examples and are not intended to limit the present application. In addition, the present application may repeat reference numerals and / or reference letters in different examples. Such repetition is for the purpose of simplification and clarity and does not in itself indicate the relationship between the various embodiments and / or settings discussed.

[0097] As described above, the foregoing are only specific embodiments of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application can easily conceive of various changes or substitutions, and these should all be covered within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. An ingot mold, characterized in that: include: A bottom mold, the bottom mold forming the bottom of the ingot mold; A side mold, which is arranged around the bottom mold to form a side edge of the ingot mold; The side mold and the bottom mold form a receiving space; A protective mold, the protective mold is arranged above the bottom mold to protect the bottom mold; the protective mold comprises a first protective mold layer and a second protective mold layer; the first protective mold layer and the second protective mold layer are both paved with a brick-like material; the material is a high temperature resistant material; The first protection mold layer and the second protection mold layer are paved into two layers, one above the other; The first protection mold layer and the second protection mold layer both include a plurality of rows of bricks; In a row of bricks, a block joint line is formed between two adjacent bricks; In the first protection mold layer and the second protection mold layer, the block splicing lines of two adjacent rows of bricks are staggered and paved.

2. The ingot mold according to claim 1, characterized in that Among multiple rows of bricks, a row joint line is formed between two adjacent rows of bricks; The row splicing lines of the first protection mold layer and the row splicing lines of the second protection mold layer are staggered.

3. The ingot mold according to any one of claims 1 to 2, characterized in that The first protection mold layer and the second protection mold layer have the same height.

4. The ingot mold according to any one of claims 1 to 2, characterized in that The first protective mold layer is paved on top of the second protective mold layer; The height of the first protection mold layer is lower than that of the second protection mold layer.

5. The ingot mold according to claim 1, characterized in that The first protective mold layer is paved on top of the second protective mold layer; In the first protective mold layer, the height of the bricks close to the side mold is lower than the height of the bricks close to and away from the side mold; Correspondingly, in the second protection mold layer, the height of the bricks close to the side mold is higher than the height of the bricks close to and away from the side mold.

6. The ingot mold according to any one of claims 1 to 2, characterized in that The first protective mold layer is paved on the second protective mold layer, and the bricks include stepped bricks; The stepped bricks are used to make: In the first protective mold layer, the height of the bricks close to the side mold is lower than the height of the bricks close to and away from the side mold; Correspondingly, in the second protection mold layer, the height of the bricks close to the side mold is higher than the height of the bricks close to and away from the side mold.

7. The ingot mold according to claim 1, characterized in that The height of the bricks is 60-80 mm.

8. The ingot mold according to claim 1, characterized in that The whole length of the brick is 1 / 20-1 / 8 of the length of the bottom mold; the whole width of the brick is 1 / 20-1 / 8 of the width of the bottom mold.

9. The ingot mold according to claim 1, characterized in that Also includes: The silicon slag layer is paved with silicon slag and spreads all over the protective mold; the paving height of the silicon slag close to the side mold is lower than the paving height of the silicon slag away from the side mold.

10. The ingot mold according to claim 9, characterized in that The laying height of silicon slag close to the side mold is: 12-20mm; The silicon slag laying height away from the side mold is 6-12mm.

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