Ingot furnace

Abstract

The invention discloses an ingot casting furnace which comprises a furnace body, a furnace cover, an ingot casting device and an ingot casting device, and the furnace body is provided with a first cavity; the heat insulation cage is arranged in the first cavity, a second cavity which is open towards the bottom is formed in the heat insulation cage, and a heat exchange block which is arranged close to the open end of the second cavity is arranged in the second cavity; the heat preservation plate assembly is arranged in the first cavity and located at the open end, located at the second cavity, of the heat insulation cage, and the heat preservation plate assembly can selectively open or close the second cavity; and the water cooling plate assembly is arranged in the first cavity, the water cooling plate assembly and the heat exchange block are oppositely arranged at intervals in the vertical direction, the vertical position, relative to the furnace body, of the water cooling plate assembly is adjustable so that the vertical distance between the water cooling plate assembly and the heat exchange block can be adjusted, and at least part of the water cooling plate assembly can stretch into the second cavity. Therefore, the relative distance between the water-cooling plate assembly and the heat exchange block can be adjusted by adjusting the vertical position of the water-cooling plate assembly in the furnace body, so that the water-cooling plate assembly is adjusted to the position suitable for heat exchange with the heat exchange block, and the crystal growth time is shortened and the crystal growth rate is accelerated through cooling and heat dissipation of the ingot furnace; and the crystals grow in a convex interface, so that impurities are prevented from being segregated inwards, and the purity of the cast large ingot can be ensured while the crystal growth rate is improved.

Description

Technical Field

[0001] The present application relates to the technical field of crystal production, and in particular to an ingot casting furnace. Background Art

[0002] At present, the main business of multi-crystalline ingot furnace is to purify silicon materials such as silicon powder and foam. The silicon materials produced through the steps of ingot casting - squaring - testing - cleaning - crushing are used for direct pulling single crystals.

[0003] In the related art, the design of the ingot casting furnace is suitable for high-efficiency polycrystalline, which mainly provides the driving force for crystal growth by moving the bottom insulation plate or the insulation cage to dissipate heat. However, due to the limitation of heat dissipation, the average crystal growth rate is limited. If the upper limit of the crystal growth rate is exceeded, the side temperature will be too low, causing impurities to condense inward from the crucible surface, resulting in high impurities in the large ingots formed by casting, which cannot meet the preparation requirements of high-purity silicon materials. Summary of the invention

[0004] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the present application is to provide an ingot casting furnace with high production efficiency and low impurities in the silicon material produced.

[0005] According to the ingot casting furnace of the embodiment of the present application, it includes: a furnace body, which has a first cavity; an insulation cage, which is arranged in the first cavity, and the insulation cage forms a second cavity which is open to the bottom, and the second cavity is provided with a heat exchange block arranged adjacent to the open end of the second cavity; an insulation plate assembly, which is arranged in the first cavity and located at the open end of the insulation cage in the second cavity, and the insulation plate assembly can selectively open or close the second cavity; a water-cooled plate assembly, which is arranged in the first cavity, and the water-cooled plate assembly and the heat exchange block are opposite and spaced apart in the vertical direction, and the vertical position of the water-cooled plate assembly relative to the furnace body is adjustable to adjust the vertical distance between the water-cooled plate assembly and the heat exchange block, and at least part of the water-cooled plate assembly can extend into the second cavity.

[0006] In the present application, the position of the heat insulation cage in the furnace body can be fixed, and the position of the insulation plate assembly can be adjusted and controlled according to the working stage of the ingot casting furnace to meet the opening and closing requirements of the second cavity under different working conditions. At the same time, by adjusting the vertical position of the water-cooled plate assembly in the furnace body, the relative distance between the water-cooled plate assembly and the heat exchange block can be adjusted, so that the water-cooled plate assembly can be adjusted to a position suitable for heat exchange with the heat exchange block, and the crystal growth time can be shortened and the crystal growth rate can be accelerated by cooling and heat dissipation of the ingot casting furnace. The crystal grows with a convex interface to avoid the inward segregation of impurities, thereby ensuring the purity of the cast large ingot while increasing the crystal growth rate.

[0007] According to some embodiments of the present application, the ingot casting furnace also includes: a driving device, which is arranged on the outside of the furnace body and is used to drive the water-cooled plate assembly to move in a vertical direction; a connecting shaft, which is arranged in the furnace body and is connected between the driving device and the water-cooled plate assembly, and the axial direction of the connecting shaft is arranged parallel to the vertical direction.

[0008] According to some embodiments of the present application, the water-cooled plate assembly includes: a water-cooled plate body, the water-cooled plate body having a heat exchange channel, the heat exchange channel being used for circulating a heat exchange medium, the liquid inlet port and the liquid outlet port of the heat exchange channel being arranged on a side of the water-cooled plate body away from the heat exchange block; a liquid inlet pipe, the liquid inlet pipe being connected to the liquid inlet port and passing through the furnace body; and a liquid outlet pipe, the liquid outlet pipe being connected to the liquid outlet port and passing through the furnace body.

[0009] According to some embodiments of the present application, the connecting sleeve is arranged on the liquid inlet pipe and the liquid outlet pipe.

[0010] According to some embodiments of the present application, the insulation board assembly includes a first insulation assembly and a second insulation assembly, the first insulation assembly and the second insulation assembly are arranged in the same plane, and the first insulation assembly and the second insulation assembly are arranged opposite each other in a first direction.

[0011] According to some embodiments of the present application, the ingot casting furnace also includes: a first driving mechanism, which is connected to the first insulation component and is used to drive the first insulation component to reciprocate along the first direction; a second driving mechanism, which is connected to the second insulation component and is used to drive the second insulation component to reciprocate along the first direction.

[0012] According to some embodiments of the present application, the ingot casting furnace further includes a graphite column, wherein the graphite column support is connected between the inner wall of the furnace body and the insulation cage, and the graphite column is suitable for avoiding the insulation board assembly in the first direction.

[0013] According to some embodiments of the present application, the ingot casting furnace further includes a guiding mechanism, and the guiding mechanism cooperates with the insulation plate assembly to guide in the first direction.

[0014] According to some embodiments of the present application, the guide mechanism is formed with a guide groove that is open to one side of the insulation board assembly and extends along the first direction, and the insulation board assembly includes: a guide plate, a portion of the guide plate extends into the guide groove and cooperates with the guide groove; a first insulation layer and a second insulation layer, the first insulation layer and the second insulation layer are respectively arranged on both side surfaces of the guide plate in the second direction, and the first direction is arranged perpendicular to the second direction.

[0015] According to some embodiments of the present application, the thickness dimension of the first thermal insulation layer in the second direction is L1, and satisfies the relationship: 45mm≤L1≤60mm; and / or, the thickness dimension of the second thermal insulation layer in the second direction is L2, and satisfies the relationship: 45mm≤L2≤60mm; and / or, the guide plate is constructed as a carbon plate, and the thickness dimension of the guide plate in the second direction is L3, and satisfies the relationship: 6mm≤L3≤10mm.

[0016] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0018] Figure 1 A cross-sectional view of an ingot casting furnace according to an embodiment of the present application Figure 1 ;

[0019] Figure 2 A cross-sectional view of an ingot casting furnace according to an embodiment of the present application Figure 2 ;

[0020] Figure 3 It is a schematic diagram of the assembly of the insulation board assembly according to one embodiment of the present application.

[0021] Reference numerals:

[0022] Ingot casting furnace 100;

[0023] Furnace body 1; first cavity 101; first support seat 11;

[0024] Heat insulation cage 2; second cavity 201;

[0025] Insulation board assembly 3; first insulation assembly 31; second insulation assembly 32; guide plate 331; first insulation layer 332; second insulation layer 333;

[0026] Water-cooling plate assembly 4; water-cooling plate body 41; second support seat 44;

[0027] Heat exchange block 5; drive device 6; connecting shaft 61; first drive mechanism 71; second drive mechanism 72;

[0028] Graphite column 8; guide mechanism 9; guide groove 91. DETAILED DESCRIPTION

[0029] The embodiments of the present application 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 application, and cannot be understood as limiting the present application.

[0030] Reference below Figure 1-Figure 3 The ingot casting furnace 100 according to an embodiment of the present application is described. The ingot casting furnace 100 can be used to purify silicon materials.

[0031] The ingot casting furnace 100 according to the embodiment of the present application includes a furnace body 1, a heat insulation cage 2, a heat preservation plate assembly 3 and a water cooling plate assembly 4.

[0032] like Figure 1 and Figure 2 As shown, the furnace body 1 has a first cavity 101, which can be used to accommodate devices such as an insulation cage 2, a thermal insulation board assembly 3 and a water-cooled board assembly 4. A relatively closed accommodating space is formed by the furnace body 1, thereby reducing the heat overflow in the first cavity 101.

[0033] Combination Figure 1 and Figure 2 The insulation cage 2 is arranged in the first cavity 101, and the insulation cage 2 forms a second cavity 201 which is open to one side of the bottom. The second cavity 201 is provided with a heat exchange block 5 which is arranged adjacent to the open end of the second cavity 201. The insulation plate assembly 3 is arranged in the first cavity 101, and the insulation plate assembly 3 is arranged at the open end of the second cavity 201 of the insulation cage 2, so that the second cavity 201 can be selectively opened or non-closed by the insulation plate assembly 3.

[0034] It is understandable that the heat insulation cage 2 has a good heat insulation effect, which can effectively prevent the heat in the second cavity 201 from overflowing, ensure the temperature in the second cavity 201, and provide a suitable temperature environment for purifying silicon materials, thereby reducing the energy consumption required for preparing crystals.

[0035] At the same time, the heat preservation plate assembly 3 is used to cooperate with the heat insulation cage 2 to selectively open or close the second cavity 201. When the second cavity 201 is blocked and closed by the heat preservation plate assembly 3, heat cannot be transferred outward through the open end of the second cavity 201 (i.e., the outside of the second cavity 201). At this time, the ingot furnace 100 is suitable for heating or keeping the material warm, which can increase the melting rate of the material; when the heat preservation plate assembly 3 opens the second cavity 201, the heat exchange block 5 arranged in the bottom area of ​​the second cavity 201 can be exposed, so that the heat can be transferred outward through the heat exchange block 5.

[0036] It should be noted that a reaction vessel (such as a crucible, etc.) is usually provided in the insulation cage 2, and the heat exchange block 5 is arranged at the bottom of the reaction vessel and can be used to transfer the heat in the reaction vessel to the outside to achieve heat exchange between the inside and outside of the insulation cage 2.

[0037] like Figure 1 and Figure 2 As shown, the water-cooled plate assembly 4 in the ingot casting furnace 100 is arranged in the first cavity 101, and the water-cooled plate assembly 4 and the heat exchange block 5 are arranged opposite to and spaced apart in the vertical direction. The vertical position of the water-cooled plate assembly 4 relative to the furnace body 1 is adjustable, so that the vertical distance between the water-cooled plate assembly 4 and the heat exchange block 5 can be adjusted, and at least part of the water-cooled plate assembly 4 can be extended into the second cavity 201, so as to adjust the heat exchange efficiency at the heat exchange block 5 by adjusting the relative distance between the water-cooled plate assembly 4 and the heat exchange block 5.

[0038] Among them, the position of the water-cooled plate assembly 4 in the furnace body 1 is adjustable, that is, the water-cooled plate assembly 4 has multiple position states. When the ingot casting furnace 100 needs to heat and melt the material in the second cavity 201, the insulation plate assembly 3 is in a closed state (that is, the insulation plate assembly 3 is set to close the second cavity 201), and the water-cooled plate assembly 4 is arranged outside the second cavity 201; when the ingot casting furnace 100 is in the crystal growth stage, the insulation plate assembly 3 is in an open state (that is, the insulation plate assembly 3 is adjusted to a position suitable for avoiding the open end of the second cavity 201), and the water-cooled plate assembly 4 can extend into the second cavity 201 through the open end of the second cavity 201, so as to perform heat exchange with the heat exchange block 5 through the water-cooled plate assembly 4, thereby improving the heat exchange efficiency at the heat exchange block 5.

[0039] It is understandable that the water-cooled plate assembly 4 and the heat exchange block 5 are arranged relative to each other in the vertical direction, and the position of the water-cooled plate assembly 4 relative to the furnace body 1 in the vertical direction is adjustable, so that the water-cooled plate assembly 4 can be moved closer to or farther away from the heat exchange block 5 along the vertical direction to adjust the relative distance between the heat exchange block 5 and the water-cooled plate assembly 4. Among them, by driving the water-cooled plate assembly 4 to rise (i.e., moving the water-cooled plate assembly 4 closer to the heat exchange block 5), the heat exchange distance between the water-cooled plate assembly 4 and the heat exchange block 5 can be shortened, thereby improving the heat exchange efficiency between the heat exchange block 5 and the water-cooled plate, and improving the heat exchange effect at the heat exchange block 5. In other words, the shorter the distance between the heat exchange block 5 and the water-cooled plate assembly 4, the higher the heat exchange efficiency between the heat exchange block 5 and the water-cooled plate. Therefore, the distance between the water-cooled plate assembly 4 and the heat exchange block 5 can be adjusted by adjusting the vertical position of the water-cooled plate assembly 4 in the furnace body 1, which has the effect of increasing the crystal growth rate of the ingot furnace 100 and reducing energy consumption.

[0040] It should be noted that, at present, the polycrystalline ingot furnace is used to purify silicon materials that cannot be directly applied to CZ single crystals, and the silicon materials produced through the steps of ingot casting-squaring-testing-cleaning-crushing are applied to CZ single crystals. In the related art, the design of the ingot furnace 100 is suitable for high-efficiency polycrystalline, which mainly provides the driving force for crystal growth by moving the bottom heat insulation plate or the heat insulation cage 2 to dissipate heat. However, due to the limitation of heat dissipation, the average value of the crystal growth rate is limited (for example, the upper limit of the crystal growth rate is 12mm / h). If the upper limit of the crystal growth rate is exceeded, the side temperature will be too low, resulting in impurities condensing inward from the crucible surface, so that the large ingot formed by casting has high impurities, which cannot meet the preparation requirements of high-purity silicon materials.

[0041] In the present application, the position of the heat insulation cage 2 in the furnace body 1 can be fixed, and the position of the insulation plate assembly 3 can be adjusted and controlled according to the working stage of the ingot casting furnace 100 to meet the opening and closing requirements of the second cavity 201 under different working conditions. At the same time, by adjusting the vertical position of the water-cooled plate assembly 4 in the furnace body 1, the relative distance between the water-cooled plate assembly 4 and the heat exchange block 5 can be adjusted, so that the water-cooled plate assembly 4 is adjusted to a position suitable for heat exchange with the heat exchange block 5, and the crystal growth time is shortened and the crystal growth rate is accelerated by cooling and heat dissipation of the ingot casting furnace 100. The crystal grows with a convex interface to avoid the inward segregation of impurities, thereby ensuring the purity of the cast large ingot while increasing the crystal growth rate.

[0042] It can be understood that, compared with the prior art solutions, the ingot casting furnace 100 in the present application does not need to provide a crystal growth driving force by moving the two insulation plates 333, thereby avoiding limited heat dissipation at the insulation plates 333, increasing the average crystal growth rate (e.g., it can reach 15mm / h-20mm / h), and promoting crystal growth in a way that avoids the inward segregation of impurities and improves the purity of the prepared large ingots.

[0043] In a further embodiment of the present application, in the vertical projection, the projection of the water-cooled plate assembly 4 falls in the opening projection of the second cavity 201 at the open end, thereby preventing interference between the water-cooled plate assembly 4 and the insulation cage 2, so that the water-cooled plate assembly 4 can be extended from the open side of the second cavity 201, so as to shorten the relative distance between the heat exchange block 5 and the water-cooled plate assembly 4, which helps to improve the heat exchange efficiency between the heat exchange block 5 and the water-cooled plate assembly 4.

[0044] It should be noted that during the position adjustment process of the insulation plate assembly 3 in the furnace body 1, the movement trajectory of the insulation plate assembly 3 is suitable for avoiding the water-cooled plate assembly 4, and can fully expose the open opening of the insulation plate 333 to ensure the heat exchange effect between the water-cooled plate assembly 4 and the insulation block.

[0045] In some embodiments of the present application, the ingot casting furnace 100 also includes: a driving device 6 and a connecting shaft 61. The driving device 6 is arranged on the outside of the furnace body 1, and the driving device 6 is used to drive the water-cooled plate assembly 4 to move in the vertical direction. The connecting shaft 61 is arranged through the furnace body 1, and the connecting shaft 61 is connected between the driving device 6 and the water-cooled plate assembly 4. The axial direction of the connecting shaft 61 is arranged parallel to the vertical direction.

[0046] Among them, the driving device 6 is arranged outside the ingot casting furnace 100, which can reduce the impact of high temperature on the driving device 6, and the connecting shaft 61 is connected between the power output end of the driving device 6 and the water-cooled plate assembly 4. The driving device 6 drives the connecting shaft 61 to move along its axial direction, so as to drive the water-cooled plate assembly 4 to move along the vertical direction through the connecting shaft 61, thereby realizing the vertical position adjustment of the water-cooled plate in the furnace body 1. The adjustment method is simple and has high reliability.

[0047] It should be noted that, in some specific embodiments, the drive device 6 can be constructed as a hydraulic drive cylinder, a drive motor, etc., which can drive the connecting shaft 61 to move in the axial direction. The type and driving method of the drive device 6 are not specifically limited here.

[0048] In some embodiments of the present application, the water-cooled plate assembly 4 includes: a water-cooled plate body 41, a liquid inlet pipe and a liquid outlet pipe, the water-cooled plate body 41 has a heat exchange channel, the heat exchange channel is used for the circulation of heat exchange medium, the liquid inlet port and the liquid outlet port of the heat exchange channel are arranged on the side of the water-cooled plate body 41 away from the heat exchange block 5, the liquid inlet pipe is connected with the liquid inlet port, and the liquid inlet pipe is arranged out of the furnace body 1, the liquid outlet pipe is connected with the liquid outlet port, and the liquid outlet pipe is arranged out of the furnace body 1.

[0049] Here, "heat exchange medium" refers to a fluid medium that circulates in the water-cooled plate body 41 and is suitable for transferring heat. The heat exchange medium can be gas, water, aqueous solution, etc., and the type of heat exchange medium is not specifically limited here.

[0050] Furthermore, the liquid inlet port and the liquid outlet port of the heat exchange channel are arranged on the side of the water cooling plate body 41 away from the heat exchange block 5, which can facilitate the installation of the liquid inlet pipe and the liquid outlet pipe, that is, it is convenient to connect the liquid inlet pipe with the liquid inlet port and the liquid outlet pipe with the liquid outlet port, and can prevent the pipeline structure (i.e. the above-mentioned liquid inlet pipe and liquid outlet pipe) from interfering with other devices in the first cavity 101.

[0051] In a further embodiment of the present application, the connecting shaft 61 is sleeved on the liquid inlet pipe and the liquid outlet pipe. The connecting shaft 61 can protect the liquid inlet pipe and the liquid outlet pipe, and can save the layout space required for the liquid inlet pipe and the liquid outlet pipe, thereby improving the integration of the equipment and reducing the risk of failure.

[0052] Among them, the liquid inlet pipe and the liquid outlet pipe can be constructed as metal pipes, which have certain structural strength and good high temperature resistance, and can improve the service life of the liquid inlet pipe and the liquid outlet pipe. At the same time, it can also prevent the liquid inlet pipe and the liquid outlet pipe from bending in the connecting shaft 61, and it is convenient to arrange the liquid inlet pipe and the liquid outlet pipe in the connecting shaft 61. It should be noted that the liquid inlet pipe and the liquid outlet pipe can be constructed as independent components relative to the connecting shaft 61, and the liquid inlet pipe and the liquid outlet pipe can also be integrated and arranged on the connecting shaft 61.

[0053] like Figure 1 and Figure 2 As shown, in some embodiments of the present application, a first support seat 11 is provided on the inner wall of the furnace body 1, and a through hole is formed on the first support seat 11, and the through hole is used for the connecting shaft 61 to pass through, so that the connecting shaft 61, the liquid inlet pipe and the liquid outlet pipe can pass through the furnace body 1, and the first support seat 11 can support the water-cooled plate assembly 4 in the vertical direction, so as to vertically support the water-cooled plate assembly 4 through the first support seat 11, avoid the water-cooled plate assembly 4 from being suspended in the first cavity 101 (i.e., forming a cantilever structure), and improve the arrangement reliability of the water-cooled plate assembly 4 in the first cavity 101.

[0054] Among them, one end of the connecting shaft 61 passing through the furnace body 1 can be connected to the driving device 6, and the ends of the liquid inlet pipe and the liquid outlet pipe passing through the furnace body 1 can be connected to a liquid storage device (such as a water storage tank, etc.).

[0055] Reference Figure 1 and Figure 2 As shown, in a further embodiment of the present application, the water-cooled plate assembly 4 also includes a second support seat 44, which is arranged on a side surface of the water-cooled plate body 41 connected to the pipeline structure, and the second support seat 44 is arranged around the connecting shaft 61, the liquid inlet pipe and the liquid outlet pipe in the circumferential direction, and the second support seat 44 can be abutted against the upper end of the first support seat 11.

[0056] Reference Figure 1 When the water-cooled plate assembly 4 is supported on the first support seat 11, the second support seat 44 abuts against the first support seat 11, so that the water-cooled plate assembly 4 can be supported by the first support seat 11, thereby improving the stability of the water-cooled plate assembly 4 in the first cavity 101.

[0057] Furthermore, a guide structure is formed between the second support seat 44 and the first support seat 11, and the guide structure can guide the movement of the second support seat 44 relative to the first support seat 11, so as to guide the second support seat 44 to a position suitable for supporting and cooperating with the first support seat 11. The "guide structure" can be configured as a guide slope formed at the end of the second support seat 44, so as to play an auxiliary role and facilitate the support and cooperation of the second support seat 44 with the first support seat 11.

[0058] It can be understood that the portion of the water-cooled plate assembly 4 within the first cavity 101 is equivalent to a cantilever structure, so that in the process of adjusting the movement of the water-cooled plate assembly 4 by the driving device 6, the water-cooled plate assembly 4 may shake. The setting of the guide structure can assist in positioning the first support seat 11 and the second support seat 44, making it easier to match the first support seat 11 with the second support seat 44.

[0059] In some embodiments of the present application, both the liquid inlet pipe and the liquid outlet pipe are configured to extend in a vertical direction, that is, the central axis of the liquid inlet pipe is arranged parallel to the central axis of the liquid outlet pipe.

[0060] Reference Figure 1 As shown, the water cooling plate body 41 is arranged horizontally in the first cavity 101, that is, the water cooling plate body 41 is arranged horizontally, so that the water cooling plate and the heat exchange surface of the heat exchange block 5 (also the bottom surface of the heat exchange block 5) are arranged parallel.

[0061] Combination Figure 1 and Figure 2 As shown, in some embodiments of the present application, the insulation board assembly 3 includes a first insulation assembly 31 and a second insulation assembly 32, the first insulation assembly 31 and the second insulation assembly 32 are arranged coplanarly, and the first insulation assembly 31 and the second insulation assembly 32 are arranged opposite each other in the first direction.

[0062] The first direction is arranged parallel to the horizontal direction, and the first heat-insulating component 31 and the second heat-insulating component 32 can be moved away from or close to each other to realize the opening or closing action of the heat-insulating board component 3. At the same time, the first heat-insulating component 31 and the second heat-insulating component 32 arranged in a split state can maintain abutment and cooperation in the closed state to ensure the sealing effect at the heat-insulating board component 3.

[0063] It is understandable that the insulation board assembly 3 is composed of two parts, the first insulation assembly 31 and the second insulation assembly 32, so that the size of each part (i.e., the first insulation assembly 31 or the second insulation assembly 32) can be reduced, and the movement stroke required for adjusting the position of the first insulation assembly 31 and the second insulation assembly 32 can be shortened. In other words, when the insulation board assembly 3 is constructed as a whole, the displacement required to adjust the insulation assembly to avoid the open end position of the second cavity 201 is relatively large, and the operation stroke required to open or close the first insulation assembly 31 and the second insulation assembly 32 arranged in a split manner is smaller, so as to avoid interference between the insulation board assembly 3 and the inner wall of the furnace body 1 during the position change process.

[0064] In a specific embodiment of the present application, the opening and closing stroke of each insulation component (i.e., the first insulation component 31 or the second insulation component 32) is 360mm-400mm, and the overall opening and closing stroke of the first insulation component 31 and the second insulation component 32 in the first direction is 720mm-800mm, thereby shortening the movement stroke of each insulation component while fully avoiding the open end of the second cavity 201, thereby meeting the opening design size requirements of the second cavity 201 at the open end.

[0065] Combination Figure 1 and Figure 2 As shown, in some embodiments of the present application, the ingot furnace 100 also includes: a first driving mechanism 71 and a second driving mechanism 72, the first driving mechanism 71 is connected to the first insulation component 31, and is used to drive the first insulation component 31 to reciprocate along the first direction, and the second driving mechanism 72 is connected to the second insulation component 32, and is used to drive the second insulation component 32 to reciprocate along the first direction.

[0066] The first drive mechanism 71 is used to drive the first heat preservation component 31, and the second drive mechanism 72 is used to drive the second heat preservation component 32. The first drive mechanism 71 is connected to the side of the first heat preservation component 31 away from the second heat preservation component 32 to prevent interference between the first drive mechanism 71 and other devices or components in the first cavity 101, and to improve the movement reliability of the first drive mechanism 71 in the process of driving the first heat preservation component 31; the second drive mechanism 72 is connected to the side of the second heat preservation component 32 away from the first heat preservation component 31 to prevent interference between the second drive mechanism 72 and other devices or components in the first cavity 101, and to improve the movement reliability of the second drive mechanism 72 in the process of driving the second heat preservation component 32.

[0067] It should be noted that the first drive mechanism 71 can be connected and fixed to the first insulation component 31 by a screw connection, and the second drive mechanism 72 can be connected and fixed to the second insulation component 32 by a screw connection. The screw connection installation method is simple and has high reliability.

[0068] Reference Figure 1 and Figure 2 As described, in a further embodiment of the present application, part of the first drive mechanism 71 and part of the second drive mechanism 72 are respectively arranged on the outside of the furnace body 1 to reduce the impact of the high temperature inside the furnace body 1 on the first drive mechanism 71 and the second drive mechanism 72, and the first drive mechanism 71 and the second drive mechanism 72 are exposed on the outside of the furnace body 1 to facilitate operators to inspect and repair the first drive mechanism 71 and the second drive mechanism 72.

[0069] It is understandable that a hole structure is formed on the furnace body 1 for the first drive mechanism 71 and the second drive mechanism 72 to pass through, and a heat insulating seal can be arranged at the hole structure. The heat insulating seal can prevent the heat of the furnace body 1 from being transferred to the first drive mechanism 71, and the heat insulating seal can play a sealing effect at the hole structure to reduce the heat overflow in the furnace body 1.

[0070] like Figure 1 and Figure 2 As shown, in some embodiments of the present application, the ingot casting furnace 100 also includes a graphite column 8, which is supported and connected between the inner wall of the furnace body 1 and the insulation cage 2, and the graphite column 8 is suitable for avoiding the insulation plate assembly 3 in a first direction to prevent the graphite column 8 from interfering with the opening of the insulation plate assembly 3.

[0071] In a specific embodiment of the present application, there are four graphite columns 8, and the four graphite columns 8 are supported at four points at the bottom of the insulation cage 2, such as: the four graphite columns 8 are arranged at the four vertices of a rectangle, thereby improving the supporting effect of the graphite columns 8 on the insulation cage 2, and a gap can be reserved between two adjacent and spaced graphite columns 8 for the first insulation component 31 or the second insulation component 32 to pass through, thereby preventing interference between the graphite columns 8 and the insulation board component 3.

[0072] It should be noted that the number and arrangement of the graphite columns 8 are not limited thereto, and the graphite columns 8 can be arranged at positions suitable for avoiding the movement path of the insulation board assembly 3 according to the support requirements of the insulation cage 2. In other words, the graphite columns 8 can also be three, five, etc.

[0073] like Figure 3 As shown, in some embodiments of the present application, the ingot furnace 100 also includes a guiding mechanism 9, which cooperates with the insulation plate assembly 3 in a first direction to guide the movement of the insulation plate assembly 3 through the guiding mechanism 9, thereby improving the stability of the insulation plate assembly 3 during the position change process.

[0074] In a further embodiment of the present application, the guide mechanism 9 is formed with a guide groove 91 which is open to one side of the thermal insulation board assembly 3 and extends along the first direction.

[0075] The insulation board assembly 3 includes: a guide plate 331, a first insulation layer 332 and a second insulation layer 333, a portion of the guide plate 331 extends into the guide groove 91, and the guide plate 331 is guided and matched with the guide groove 91, the first insulation layer 332 and the second insulation layer 333 are respectively arranged on the two side surfaces of the guide plate 331 in the second direction, and the first direction is perpendicular to the second direction. It should be noted that the first direction is the horizontal direction and the second direction is the vertical direction.

[0076] Reference Figure 3The insulation board assembly 3 is composed of a multi-layer structure to form a structure that cooperates with the guide mechanism 9 while ensuring the insulation performance of the insulation board assembly 3. It can be understood that the multi-layer insulation structure enables the insulation board assembly 3 to have good insulation performance and can effectively prevent the heat in the second cavity 201 from overflowing.

[0077] In some embodiments of the present application, the guide mechanism 9 is constructed as a graphite guide rail, and the guide groove 91 is arranged to penetrate the graphite guide rail along the first direction. In the process of opening and closing the insulation board assembly 3, at least part of the guide plate 331 remains embedded in the guide groove 91, so that the guide plate 331 can always cooperate with the guide groove, thereby improving the reliability and stability of the guide mechanism 9 guiding the insulation board assembly 3.

[0078] like Figure 2 As shown, in some embodiments of the present application, the thickness dimension of the first thermal insulation layer 332 in the second direction is L1, and satisfies the relationship: 45mm≤L1≤60mm.

[0079] like Figure 2 As shown, in some embodiments of the present application, the thickness dimension of the second thermal insulation layer 333 in the second direction is L2, and satisfies the relationship: 45mm≤L2≤60mm.

[0080] like Figure 2 As shown, in some embodiments of the present application, the guide plate 331 is constructed as a carbon plate, and the thickness dimension of the guide plate 331 in the second direction is L3, and satisfies the relationship: 6mm≤L3≤10mm.

[0081] When the plate structure in the insulation plate assembly 3 meets the above parameter range, the insulation effect of the insulation plate assembly 3 can be guaranteed. It should also be noted that the specific thickness of the insulation layer (i.e., the first insulation layer 332 and the second insulation layer 333) and the material of the insulation layer can be set according to the insulation requirements of the insulation cage 2, and are not limited thereto.

[0082] In some embodiments of the present application, the operating stroke of the driving device 6 driving the water-cooled plate assembly 4 can be designed according to the layout position of the water-cooled plate assembly 4 and the layout position of the water-cooled plate assembly 4 relative to the heat exchange block 5, such as: an operating stroke of 250mm-300mm.

[0083] In summary, the ingot casting furnace 100 according to the embodiment of the present application has at least the following advantages compared with the prior art:

[0084] (1) The distance between the water-cooled plate assembly 4 and the heat exchange block 5 can be adjusted by controlling the lifting of the water-cooled plate assembly 4, thereby adjusting the heat exchange efficiency at the heat exchange block 5, thereby improving the cooling efficiency at the heat exchange block 5 and making the heat dissipation process more uniform and stable, thereby shortening the crystal growth time (e.g., 10h-15h) and increasing the crystal growth rate (e.g., from 12mm / h to 15-20mm / h), and the energy consumption required to prepare each large ingot will be reduced by 900kw.h-1350kw.h.

[0085] (2) The insulation board assembly 3 is composed of two parts, the first insulation assembly 31 and the second insulation assembly 32, and the open end of the second cavity 201 can be opened or closed by opening in a split manner, thereby shortening the movement stroke required for the insulation board assembly 3 to open or close.

[0086] Combination Figure 1 , Figure 2 and Figure 3 The working method of the ingot casting furnace 100 according to the embodiment of the present application is described as follows:

[0087] When the material needs to be heated and melted, the water-cooling plate assembly 4 is lowered below the insulation plate assembly 3, and the insulation plate assembly 3 is controlled to be closed. At the same time, the water-cooling plate assembly 4 and the insulation plate assembly 3 can be kept spaced apart in the vertical direction, and the distance is preferably 10mm-30mm;

[0088] When the ingot casting furnace 100 is in the crystal growth stage, the heat preservation plate assembly 3 is controlled to be opened, so as to adjust the heat preservation plate assembly 3 to a position suitable for avoiding the water cooling plate assembly 4, and gradually raise the water cooling plate assembly 4, so that the distance between the water cooling plate assembly 4 and the heat exchange block 5 is gradually reduced;

[0089] When the ingot furnace 100 is in the annealing and cooling stage, the distance between the water cooling plate assembly 4 and the heat exchange block 5 can be adjusted, such as being maintained within the range of 10 mm-30 mm, to improve the annealing and cooling efficiency.

[0090] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0091] In the description of this application, "first feature" or "second feature" may include one or more of the features.

[0092] In the description of the present application, “plurality” means two or more.

[0093] In the description of the present application, a first feature being “on” or “under” a second feature may include that the first and second features are directly in contact with each other, or may include that the first and second features are not in direct contact with each other but are in contact with each other via another feature therebetween.

[0094] In the description of the present application, “above”, “over” and “above” a first feature to a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0095] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0096] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. An ingot casting furnace, characterized in that: include: A furnace body (1), wherein the furnace body (1) has a first cavity (101); A heat insulation cage (2), the heat insulation cage (2) being arranged in the first cavity (101), the heat insulation cage (2) forming a second cavity (201) open to the bottom, the second cavity (201) being provided with a heat exchange block (5) arranged adjacent to the open end of the second cavity (201); a heat preservation board assembly (3), the heat preservation board assembly (3) being arranged in the first cavity (101) and located at the open end of the heat insulation cage (2) in the second cavity (201), the heat preservation board assembly (3) being able to selectively open or close the second cavity (201); A water-cooled plate assembly (4), wherein the water-cooled plate assembly (4) is arranged in the first cavity (101), and the water-cooled plate assembly (4) and the heat exchange block (5) are arranged opposite to each other and spaced apart in the vertical direction, and the vertical position of the water-cooled plate assembly (4) relative to the furnace body (1) is adjustable to adjust the vertical distance between the water-cooled plate assembly (4) and the heat exchange block (5), and at least a portion of the water-cooled plate assembly (4) can extend into the second cavity (201).

2. The ingot casting furnace according to claim 1, characterized in that: The ingot casting furnace also includes: A driving device (6), the driving device (6) being arranged on the outside of the furnace body (1) and being used to drive the water-cooling plate assembly (4) to move in a vertical direction; A connecting shaft (61), the connecting shaft (61) is arranged to pass through the furnace body (1), and the connecting shaft (61) is connected between the driving device (6) and the water-cooling plate assembly (4), and the axial direction of the connecting shaft (61) is arranged parallel to the vertical direction.

3. The ingot casting furnace according to claim 2, characterized in that: The water cooling plate assembly (4) comprises: A water-cooling plate body (41), the water-cooling plate body (41) having a heat exchange flow channel, the heat exchange flow channel being used for circulating a heat exchange medium, the liquid inlet port and the liquid outlet port of the heat exchange flow channel being arranged on a side of the water-cooling plate body (41) away from the heat exchange block (5); a liquid inlet pipe, the liquid inlet pipe being in communication with the liquid inlet port and being arranged through the furnace body (1); A liquid outlet pipe is connected to the liquid outlet port and is arranged through the furnace body (1).

4. The ingot casting furnace according to claim 3, characterized in that: The connecting shaft (61) is sleeved on the liquid inlet pipe and the liquid outlet pipe.

5. The ingot casting furnace according to claim 1, characterized in that: The thermal insulation board assembly (3) comprises a first thermal insulation assembly (31) and a second thermal insulation assembly (32); the first thermal insulation assembly (31) and the second thermal insulation assembly (32) are arranged coplanarly, and the first thermal insulation assembly (31) and the second thermal insulation assembly (32) are arranged opposite to each other in a first direction.

6. The ingot casting furnace according to claim 5, characterized in that: The ingot casting furnace also includes: A first driving mechanism (71), the first driving mechanism (71) being connected to the first heat preservation component (31) and being used to drive the first heat preservation component (31) to reciprocate along the first direction; A second driving mechanism (72), the second driving mechanism (72) is connected to the second heat preservation component (32) and is used to drive the second heat preservation component (32) to move back and forth along the first direction.

7. The ingot casting furnace according to claim 5, characterized in that: The ingot casting furnace further comprises a graphite column (8), wherein the graphite column (8) is supported and connected between the inner wall of the furnace body (1) and the heat insulation cage (2), and the graphite column (8) is suitable for avoiding the heat preservation plate assembly (3) in the first direction.

8. The ingot casting furnace according to claim 5, characterized in that: The ingot casting furnace further comprises a guiding mechanism (9), wherein the guiding mechanism (9) cooperates with the insulation board assembly (3) in guiding manner in the first direction.

9. The ingot casting furnace according to claim 8, characterized in that: The guide mechanism (9) is formed with a guide groove (91) which is open to one side of the insulation board assembly (3) and extends along the first direction. The insulation board assembly (3) comprises: A guide plate (331), wherein a portion of the guide plate (331) extends into the guide groove (91) and cooperates with the guide groove (91) for guidance; A first thermal insulation layer (332) and a second thermal insulation layer (333), wherein the first thermal insulation layer (332) and the second thermal insulation layer (333) are respectively arranged on two side surfaces of the guide plate (331) in a second direction, and the first direction is arranged perpendicular to the second direction.

10. The ingot casting furnace according to claim 9, characterized in that: The thickness dimension of the first thermal insulation layer (332) in the second direction is L1, and satisfies the relationship: 45 mm ≤ L1 ≤ 60 mm; And / or, the thickness dimension of the second thermal insulation layer (333) in the second direction is L2, and satisfies the relationship: 45 mm ≤ L2 ≤ 60 mm; And / or, the guide plate (331) is constructed as a carbon plate, and the thickness dimension of the guide plate (331) in the second direction is L3, and satisfies the relationship: 6mm≤L3≤10mm.

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