Crucible and ingot furnace
By setting ventilation holes on the side wall of the crucible, the problem of air pollution during the dehydrogenation of particulate silicon is solved, and a one-way air flow is achieved, which improves the dehydrogenation efficiency and quality.
Patent Information
- Application Number
- CN202421371829.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-14
- Publication Date
- 2025-02-28
- Estimated Expiration
- 2034-06-14
AI Technical Summary
During the dehydrogenation process of particulate silicon, the confined space of the crucible leads to poor fluidity of the protective gas, which is prone to stuffiness, resulting in particulate silicon contamination.
A crucible is designed with a side wall forming a ventilation hole, which penetrates the pot and the body to form a one-way airflow to prevent the occurrence of stuffy air.
Through the design of the ventilation holes, we ensure that the protective gas and hydrogen can be exported smoothly, avoid air pollution, and improve the dehydrogenation efficiency and quality of particulate silicon.
Smart Images
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Abstract
Description
Technical Field
[0001] The present application relates to the technical field of granular silicon dehydrogenation, and in particular to a crucible and an ingot casting furnace. Background Art
[0002] In the related art, in order to achieve dehydrogenation of granular silicon, granular silicon is often placed in a crucible for heating, and a protective gas such as argon is introduced to carry away the hydrogen generated after the granular silicon is heated, thereby achieving dehydrogenation of the granular silicon. However, during the crucible heating process, in order to prevent oxide impurities in the external environment from falling into the crucible and affecting dehydrogenation, a cover is provided above the crucible, so that the cover and the crucible form an enclosed space. During the dehydrogenation process, the enclosed space is prone to suffocation due to the poor fluidity of the protective gas, resulting in contamination of the granular silicon. Utility Model Content
[0003] In view of this, the utility model aims to solve one of the problems in the related art at least to a certain extent. To this end, the purpose of the utility model is to provide a crucible and an ingot casting furnace.
[0004] The present application provides a crucible for dehydrogenating granular silicon, the crucible comprising a pot and a body. The body is detachably arranged in the pot. A vent hole is formed on the side wall of the crucible, and the vent hole passes through the pot and the body.
[0005] In certain embodiments, the crucible has an opening, and the vent hole is closer to the opening than to the bottom of the crucible.
[0006] In some embodiments, there are a plurality of vent holes, and the vent holes are arranged at intervals along the circumference of the crucible.
[0007] In some embodiments, the number of the vents is 4-12.
[0008] In some embodiments, the ventilation holes are rectangular holes and / or circular holes.
[0009] In certain embodiments, the vent holes have a diameter ranging from 10 mm to 30 mm.
[0010] In some embodiments, an end of the body facing the opening of the crucible protrudes beyond the edge of the pot.
[0011] In some embodiments, the crucible further includes a cover plate, which is detachably connected to the body and the pot and covers the opening of the crucible.
[0012] In some embodiments, the cover plate is provided with a through hole, and the through hole is used to introduce protective gas into the crucible.
[0013] The present application also provides an ingot casting furnace. The vehicle comprises the crucible described in any of the above embodiments.
[0014] The crucible and ingot casting furnace of the embodiment of the present application are provided with vent holes on the side walls of the crucible, and the vent holes are passed through the pot and the body, so that when the crucible dehydrogenates granular silicon, the protective gas and hydrogen introduced into the crucible can be discharged from the crucible after the protective gas enters the crucible, forming a unidirectional airflow, which is not easy to cause stuffiness and is beneficial to the dehydrogenation of granular silicon.
[0015] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:
[0017] Figure 1 It is one of the structural schematic diagrams of the crucible according to the embodiment of the present application;
[0018] Figure 2 This is the second schematic diagram of the structure of the crucible according to the embodiment of the present application.
[0019] Main component reference numbers:
[0020] Crucible 100; pot 10; body 20; side wall 30; vent 40; opening 50; cover 60; through hole 70. DETAILED DESCRIPTION
[0021] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.
[0022] In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance, or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.
[0023] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense, and may refer to fixed connection, detachable connection, or integral connection; mechanical connection, electrical connection, or mutual communication; direct connection, indirect connection through an intermediate medium, internal connection between two elements, or interaction between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0024] The disclosure below provides many different embodiments or examples for realizing different structures of the present invention. In order to simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention may repeat reference numbers and / or reference letters in different examples, and such repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.
[0025] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.
[0026] See also Figure 1 The present application provides a crucible 100 for dehydrogenating granular silicon. The crucible 100 includes a pot 10 and a body 20. The body 20 is detachably disposed in the pot 10. A vent hole 40 is formed on the side wall 30 of the crucible 100, and the vent hole 40 passes through the pot 10 and the body 20.
[0027] Specifically, the body 20 can be arranged in the pot 10 by snapping or screwing, so as to facilitate the installation and removal of the body 20. The shape of the body 20 can match the shape of the pot 10, that is, when the shape of the pot 10 is a column or a rectangle, the shape of the body 20 can also be a column or a rectangle, so that the body 20 can be detachably arranged in the pot 10, and the pot 10 can support and protect the body 20 when the crucible 100 is heated, and prevent the body 20 from collapsing at high temperature.
[0028] The side wall 30 of the crucible 100 may be formed with evenly arranged vents 40, and the vents 40 may penetrate the pot 10 and the body 20, so that when the crucible 100 dehydrogenates the granular silicon, the protective gas introduced into the crucible 100 may form a one-way airflow through the vents 40, so that the generated hydrogen can be discharged from the crucible 100 along the flow direction of the protective gas, so that the airflow in the crucible 100 is smooth, reducing hydrogen jumps while improving the quality and yield of granular silicon. It should be noted that the pot 10 and the body 20 may be made of clay, graphite, porcelain clay, quartz or a relatively difficult-to-melt metal iron, so that the crucible 100 can withstand high temperatures.
[0029] In one embodiment, when the granular silicon is dehydrogenated and the protective gas enters the body 20, the protective gas can flow out of the vent hole 40 to form a one-way airflow. At this time, the hydrogen generated by the dehydrogenation of the granular silicon can be discharged out of the crucible 100 along the flow direction of the protective gas, so that the crucible 100 is not prone to stuffiness during the dehydrogenation of the granular silicon, which is beneficial to the dehydrogenation of the granular silicon. It should be noted that the protective gas can be argon.
[0030] In this way, the crucible 100 of the embodiment of the present application is provided with a vent hole 40 on the side wall 30 of the crucible 100, and the vent hole 40 runs through the pot 10 and the main body 20, so that when the crucible 100 dehydrogenates granular silicon, the protective gas and hydrogen introduced into the crucible 100 can be discharged from the crucible 100 after the protective gas enters the crucible 100, forming a unidirectional airflow, which is not easy to cause stuffiness and is beneficial to the dehydrogenation of granular silicon.
[0031] See also Figure 1 In some embodiments, the crucible 100 has an opening 50, and the vent hole 40 is closer to the opening 50 relative to the bottom of the crucible 100. That is, in the embodiment of the present application, by arranging the vent hole 40 at a position of the side wall 30 that is closer to the opening 50 relative to the bottom of the crucible 100, it is possible to ensure that the granular silicon does not flow out of the vent hole 40 when heated to liquid at high temperature, and at the same time, it is possible to ensure that the hydrogen generated by the dehydrogenation of the granular silicon can be discharged from the crucible 100 through the vent hole 40 along the flow direction of the protective gas.
[0032] In some embodiments, the number of the vent holes 40 is multiple, and the vent holes 40 are arranged at intervals along the circumference of the crucible 100. That is, when multiple vent holes 40 are provided on the side wall 30 of the crucible 100, they can be arranged at a predetermined distance along the circumference of the crucible 100, so that the multiple vent holes 40 are evenly distributed on the side wall 30 of the crucible 100 in a centrally symmetrical or rotationally symmetrical manner, and it is more conducive to the uniform discharge of the gas flow from the crucible 100, and it is not easy to form a gas vortex. It should be noted that the predetermined distance can be, for example, 0.1m, 0.2m, 0.3m, 0.4m, 0.5m, 0.6m, 0.7m or 0.8m, which is not limited here.
[0033] In some embodiments, the number of the vents 40 is 4-12. That is, by providing 4-12 vents 40 on the side wall 30 of the crucible 100, the embodiment of the present application can ensure that the hydrogen generated by the dehydrogenation of the granular silicon is discharged from the vents 40 outside the crucible 100 along with the flow of the protective gas, while making the crucible 100 more beautiful as a whole. It should be noted that the number of vents 40 provided on the side wall 30 of the crucible 100 can also be set according to actual application conditions, and specifically, the number of vents 40 is not limited to 4-12.
[0034] In some embodiments, the vent hole 40 is a rectangular hole and / or a circular hole. That is, the vent hole 40 is a rectangular hole and / or a circular hole and can include the following three situations: (1) The vent hole 40 is a rectangular hole. (2) The vent hole 40 is a circular hole. (3) The vent hole 40 is a rectangular hole and a circular hole. It should be noted that in addition to being a rectangular hole or a circular hole, the shape of the vent hole 40 can also be set according to the actual application situation, and it is only necessary to ensure that the protective gas can enter the main body 20 and then flow out of the vent hole 40 to form a one-way airflow.
[0035] In some embodiments, the aperture of the vent hole 40 ranges from 10 mm to 30 mm. That is, by setting the aperture of the vent hole 40 to any value between 10 mm and 30 mm, the embodiment of the present application can ensure that the hydrogen generated by the dehydrogenation of the granular silicon can be discharged from the vent hole 40 to the outside of the crucible 100 along the flow direction of the protective gas, while preventing the aperture of the vent hole 40 from being too large, causing the granular silicon to be heated to liquid at high temperature and then flow out of the vent hole 40.
[0036] See also Figure 1 In some embodiments, one end of the body 20 facing the opening 50 of the crucible 100 protrudes from the edge of the crucible 10. That is, in the embodiment of the present application, by protruding one end of the body 20 facing the opening 50 of the crucible 100 from the edge of the crucible 10, it is convenient for the subsequent cover plate to be connected to the body 20 and the crucible 10 and cover the opening 50 of the crucible 100, so as to prevent oxide impurities in the external environment from entering the crucible 100 during the dehydrogenation of the granular silicon, thereby affecting the dehydrogenation of the granular silicon.
[0037] Please combine Figure 1 and Figure 2In some embodiments, the crucible 100 further includes a cover plate 60, which is detachably connected to the body 20 and the pot 10 and covers the opening 50 of the crucible 100. That is, the cover plate 60 is detachably connected to the body 20 and the pot 10 by snap-fitting or threading, and the cover plate 60 can cover the opening 50 of the crucible 100 to prevent oxide impurities in the external environment from entering the crucible 100 during the dehydrogenation of the granular silicon, thereby affecting the dehydrogenation of the granular silicon. It should be noted that the cover plate 60 can be made of clay, graphite, porcelain clay, quartz or a relatively difficult-to-melt metal such as iron, so that the cover plate 60 can withstand high temperatures. The shape of the cover 60 can be matched with the shape of the body 20 or the pot-bang 10, that is, when the shape of the body 20 or the pot-bang 10 is a columnar body or a rectangular body, the shape of the cover 60 can also be circular or rectangular, so that the cover 60 can be detachably connected to the body 20 and the pot-bang 10 and cover the opening 50 of the crucible 100.
[0038] In some embodiments, the cover plate 60 is provided with a through hole 70, and the through hole 70 is used to introduce a protective gas into the crucible 100. That is, in the embodiment of the present application, by providing the through hole 70 on the cover plate 60, a protective gas can be introduced into the crucible 100 through the through hole 70 during the dehydrogenation of the granular silicon, so that the hydrogen generated by the dehydrogenation of the granular silicon can be discharged from the crucible 100 through the vent 40 along with the protective gas, thereby ensuring smooth gas flow in the crucible 100 and improving the quality of the granular silicon, and the granular silicon after dehydrogenation can reduce hydrogen jump during the single crystal use stage.
[0039] The present application also provides an ingot casting furnace. The ingot casting furnace includes the crucible 100 described above. The specific structure of the crucible 100 is as described above, and for the sake of brevity, it will not be repeated here.
[0040] In this way, the ingot casting furnace of the embodiment of the present application forms a vent hole 40 on the side wall 30 of the crucible 100, and the vent hole 40 runs through the pot 10 and the main body 20, so that when the crucible 100 dehydrogenates granular silicon, the protective gas and hydrogen introduced into the crucible 100 can be discharged from the crucible 100 after the protective gas enters the crucible 100, forming a unidirectional airflow, which is not easy to produce stuffiness and is beneficial to the dehydrogenation of granular silicon.
[0041] The above embodiments only express several implementation methods of the utility model, and the descriptions are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.
Claims
1. A crucible for dehydrogenating granular silicon, characterized in that: The crucible comprises: Pot Bang; A body, the body being detachably arranged in the pot body; Wherein, a vent hole is formed on the side wall of the crucible, and the vent hole passes through the pot and the body.
2. The crucible according to claim 1, characterized in that The crucible has an opening, and the vent hole is closer to the opening than to the bottom of the crucible.
3. The crucible according to claim 1, characterized in that There are a plurality of vent holes, and the vent holes are arranged at intervals along the circumference of the crucible.
4. The crucible according to claim 3, characterized in that The number of the ventilation holes is 4-12.
5. The crucible according to claim 1, characterized in that The vent holes are rectangular holes and / or circular holes.
6. The crucible according to claim 1, characterized in that The aperture of the vent hole ranges from 10 mm to 30 mm.
7. The crucible according to claim 1, characterized in that One end of the body facing the opening of the crucible protrudes from the edge of the pot.
8. The crucible according to claim 1, characterized in that The crucible further comprises a cover plate, which is detachably connected to the body and the pot and covers the opening of the crucible.
9. The crucible according to claim 8, characterized in that The cover plate is provided with a through hole, and the through hole is used to introduce protective gas into the crucible.
10. An ingot casting furnace, characterized in that: The ingot casting furnace comprises the crucible according to any one of claims 1-9.