Industrial silicon ingot mold base plate structure

Abstract

The utility model provides a kind of industrial silicon ingot mould bottom plate structure, including the box body of top open structure, the bottom of the box body is equipped with clamping groove, first bottom plate layer is equipped in the clamping groove, second bottom plate layer is equipped on the first bottom plate layer, the first bottom plate layer has multiple first refractory brick splicing composition, and the second bottom plate layer is spliced by multiple second refractory brick composition.The utility model sets up first bottom plate layer and second bottom plate layer by silicon nitride combined with silicon carbide brick in the bottom of box body, can effectively increase the heat resistance and wear resistance of mould bottom, greatly improve service life, while also can prevent iron element melt into silicon water, affect silicon ingot quality;Second bottom plate layer part position is damaged, and the second refractory brick of corresponding position can be replaced directly, convenient and fast time-saving and labor-saving;Simple structure, low cost.

Description

Technical Field

[0001] This utility model belongs to the field of silicon processing technology and relates to an industrial silicon ingot mold base plate structure. Background Technology

[0002] Traditional industrial silicon ingot mold base plates are mostly made of cast iron. Currently, there are the following defects in their use: the mold base plate is prone to deformation and melting at high temperatures, resulting in a short service life (about 90 days), which requires frequent maintenance or replacement, resulting in high costs; in addition, the Fe element in the cast iron base plate can easily mix into the silicon molten metal, thereby contaminating the silicon ingot and reducing the product grade. Utility Model Content

[0003] The purpose of this utility model is to address the problems of short service life and easy contamination of silicon ingots by existing cast iron base plates in the background art, and to provide an industrial silicon ingot mold base plate structure.

[0004] Therefore, the present invention adopts the following technical solution:

[0005] An industrial silicon ingot mold base plate structure includes a box body with an open top, a slot at the bottom of the box body, a first base plate layer inside the slot, and a second base plate layer on the first base plate layer. The first base plate layer is composed of multiple first refractory bricks spliced ​​together, and the second base plate layer is composed of multiple second refractory bricks spliced ​​together.

[0006] Furthermore, the upper surface of the second base plate layer is flush with the top of the slot.

[0007] Furthermore, a first joint is formed between the first refractory bricks, and a first filling layer is provided in the first joint; a second joint is formed between the second refractory bricks, and a second filling layer is provided in the second joint.

[0008] Furthermore, the width of the first brick joint and the second brick joint is less than 2mm.

[0009] Furthermore, a first adhesive layer is provided at the bottom of the card slot between the first base plate layer and the first card slot.

[0010] Furthermore, a second adhesive layer is provided between the first base plate layer and the second base plate layer.

[0011] Furthermore, a first sidewall layer is provided between the first base plate layer and the sidewall of the slot.

[0012] Furthermore, a second sidewall layer is provided between the second base plate layer and the sidewall of the slot.

[0013] Furthermore, the first and second refractory bricks are silicon nitride-bonded silicon carbide bricks.

[0014] The beneficial effects of this utility model are as follows: the first and second bottom plates, which are made of silicon nitride and silicon carbide bricks, are set at the bottom of the box, which can effectively increase the heat resistance and wear resistance of the bottom of the mold, greatly improve the service life, and at the same time prevent iron elements from dissolving into the silicon water and affecting the quality of silicon ingots; if a part of the second bottom plate is damaged, the second refractory brick at the corresponding position can be directly replaced, which is convenient, quick and saves time and effort; the structure is simple and the cost is low. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] In the figure, 1-box body, 2-slot, 3-first bottom plate layer, 301-first refractory brick, 4-first adhesive layer, 5-first brick joint, 6-first filling layer, 7-second bottom plate layer, 701-second refractory brick, 8-second adhesive layer, 9-second brick joint, 10-second filling layer, 11-first side wall layer, 12-second side wall layer. Detailed Implementation

[0017] The present invention will now be described in detail with reference to the accompanying drawings:

[0018] like Figure 1As shown, an industrial silicon ingot mold base plate structure includes a box body 1 with an open top, a slot 2 at the bottom of the box body 1, a first base plate layer 3 inside the slot 2, and a first adhesive layer 4 between the bottom of the slot 2 and the first base plate layer 3 to maintain the stability of the first base plate layer 3. The first adhesive layer 4 is made of silicon carbide. The first adhesive layer 4 can bond the first base plate layer 3 to the bottom of the slot 2. Silicon carbide slurry is applied to the bottom of the slot 2, and after the slurry solidifies, the first adhesive layer 4 is formed. The first base plate layer 3 is composed of multiple first refractory bricks 301 spliced ​​together. Specifically, the first refractory bricks 301 are silicon nitride-bonded silicon carbide bricks. The first base plate layer 3 is formed by laying the first refractory bricks 301 flat at the bottom of the box body 1. During laying, a first brick joint 5 is formed between the first refractory bricks 301, and the width of the first brick joint 5 is less than 2mm. A first filling layer 6 is provided in the first brick joint 5. The first filling layer 6 is made of silicon carbide, and silicon carbide is filled into the first filling layer 6 during manufacturing. A second base plate layer 7 is provided on the first base plate layer 3, and a second adhesive layer is provided between the second base plate layer 7 and the first base plate layer 3. Layer 8, the second adhesive layer 8 is made of silicon carbide, that is, silicon carbide slurry is applied to the upper surface of the first base plate layer 3 and the second adhesive layer 8 is formed after the silicon carbide slurry solidifies. The second base plate layer 7 is composed of multiple second refractory bricks 701 spliced ​​together. The second refractory bricks 701 are also silicon nitride bonded silicon carbide bricks. Silicon nitride bonded silicon carbide bricks have good alkali erosion resistance, resistance to molten cryolite wetting, oxidation resistance, wear resistance, high thermal conductivity, thermal shock resistance and extremely low electrical conductivity. The second base plate layer 7 is formed by vertically placing the second refractory bricks 701 and laying them on the second adhesive layer 8. The second brick joint 9 is formed between the second refractory bricks 701. The width of the second brick joint 9 is less than 2mm. The second brick joint 9 is provided with a second filling layer 10, which is made of silicon carbide. The upper surface of the second base plate layer 7 is flush with the top of the slot 2.

[0019] The installation of a first bottom plate layer 3 and a second bottom plate layer 7 enhances the integrity and erosion resistance of the bottom of the box body 1, effectively improving its service life.

[0020] In addition, in order to prevent gaps between the first base plate layer 3 and the second base plate layer 4 and the sidewall of the slot 2 from affecting the quality of silicon ingots, a first sidewall layer 11 is provided between the first base plate layer 3 and the sidewall of the slot 2, and a second sidewall layer 12 is provided between the second base plate layer 4 and the sidewall of the slot 2. Both the first sidewall layer 11 and the second sidewall layer 12 are made of silicon carbide. The gaps between the first base plate layer 3 and the second base plate layer 4 and the sidewall of the slot 2 can be effectively filled through the first sidewall layer 11 and the second sidewall layer 12.

[0021] The method of using this utility model is as follows:

[0022] When casting silicon ingots, the mold pours molten silicon into the box 1. During pouring, the molten silicon washes the upper surface of the second bottom plate layer 4. Since the second bottom plate layer 4 is made of silicon nitride combined with silicon carbide bricks, it has good wear resistance compared to cast iron, which greatly improves the service life. At the same time, it can also prevent iron elements from dissolving into the molten silicon and affecting the quality of the silicon ingot.

[0023] In addition, when the second base layer 4 is damaged, the second refractory brick 701 at the corresponding position can be directly replaced, which is convenient, quick and saves time and effort.

Claims

1. A base plate structure for an industrial silicon ingot mold, characterized in that, The box (1) has an open top and a slot (2) at the bottom. A first bottom plate layer (3) is provided in the slot (2). A second bottom plate layer (7) is provided on the first bottom plate layer (3). The first bottom plate layer (3) is composed of multiple first refractory bricks (301) spliced ​​together, and the second bottom plate layer (7) is composed of multiple second refractory bricks (701) spliced ​​together.

2. The industrial silicon ingot mold base plate structure according to claim 1, characterized in that, The upper surface of the second base plate layer (7) is flush with the top of the slot (2).

3. The industrial silicon ingot mold base plate structure according to claim 1, characterized in that, A first brick joint (5) is formed between the first refractory bricks (301), and a first filling layer (6) is provided in the first brick joint (5). A second brick joint (9) is formed between the second refractory bricks (701), and a second filling layer (10) is provided in the second brick joint (9).

4. The industrial silicon ingot mold base plate structure according to claim 3, characterized in that, The width of the first brick joint (5) and the second brick joint (9) is less than 2 mm.

5. The industrial silicon ingot mold base plate structure according to claim 1, characterized in that, The bottom of the card slot (2) is provided with a first adhesive layer (4) between the first base plate layer (3).

6. The industrial silicon ingot mold base plate structure according to claim 1, characterized in that, A second adhesive layer (8) is provided between the first base plate layer (3) and the second base plate layer (7).

7. The industrial silicon ingot mold base plate structure according to claim 1, characterized in that, A first sidewall layer (11) is provided between the first base plate layer (3) and the sidewall of the slot (2).

8. The industrial silicon ingot mold base plate structure according to claim 1, characterized in that, A second sidewall layer (12) is provided between the second bottom plate layer (7) and the sidewall of the slot (2).

9. The industrial silicon ingot mold base plate structure according to claim 1, characterized in that, The first refractory brick (301) and the second refractory brick (701) are silicon nitride bonded silicon carbide bricks.

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