CN220959574U - Ingot furnace - Google Patents

Abstract

The utility model discloses an ingot furnace, which comprises: the heat preservation device comprises a bottom heat preservation plate, a side heat preservation plate and a top heat preservation plate, wherein the top heat preservation plate is connected with the upper end of the side heat preservation plate, the lower end of the side heat preservation plate is provided with a supporting part extending towards the inner side of the heat preservation device, and the bottom heat preservation plate is positioned on the radial inner side of the supporting part and is spaced from the supporting part; a heater including a side heater and a top heater; the DS block is arranged above the bottom heat-insulating plate; the bottom plate is arranged above the DS block and is overlapped with the DS block; the lateral heat preservation strip is arranged on the supporting part, and the distance between the upper end of the lateral heat preservation strip and the lowest end of the lateral heater is 10-20mm. According to the ingot furnace disclosed by the utility model, the overhigh temperature of the lower furnace body can be avoided, the damage and air leakage of the aluminum pipe are avoided, the safety is improved, the heat preservation effect is also improved, the heat utilization rate is improved, the power of the heater can be reduced, and the power consumption is reduced.

Description

Ingot furnace

Technical Field

The utility model relates to the technical field of ingot furnaces, in particular to an ingot furnace.

Background

The pot side is one of the spare parts of the Czochralski single crystal thermal field, the quartz crucible is placed in the pot side, the silicon material is arranged in the quartz crucible, the quartz crucible is softened at high temperature, the pot side plays a supporting role on the quartz crucible, the pot side is in direct contact with the quartz crucible, if the impurity content in the pot side is high, the quartz crucible can be crystallized, overflow is seriously possibly caused, and the volatizable impurities can be removed by baking the pot side by using an ingot furnace at present.

The original thermal field structure of the ingot furnace is suitable for casting polycrystalline silicon ingots, and the pot side is placed in the original thermal field structure, so that the problems of air leakage of an aluminum pipe, high safety of a lower furnace body and high power consumption can be caused under high-temperature baking.

Disclosure of utility model

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model provides the ingot furnace, which avoids overhigh temperature of a lower furnace body, avoids damage and air leakage of an aluminum pipe, improves safety, simultaneously improves heat preservation effect, improves heat utilization rate, and reduces power of a heater and electricity consumption.

According to an embodiment of the utility model, an ingot furnace comprises: the heat preservation device comprises a bottom heat preservation plate, a side heat preservation plate and a top heat preservation plate, wherein the top heat preservation plate is connected with the upper end of the side heat preservation plate, the lower end of the side heat preservation plate is provided with a supporting part extending towards the inner side of the heat preservation device, and the bottom heat preservation plate is positioned on the radial inner side of the supporting part and is spaced from the supporting part; the heater comprises a side heater and a top heater, the side heater is arranged on the inner side of the side heat-insulating plate, and the top heater is arranged on the inner side of the top heat-insulating plate; the DS block is arranged above the bottom heat-insulating plate and is arranged at intervals with the bottom heat-insulating plate; the bottom plate is arranged above the DS block and is overlapped with the DS block; the lateral heat preservation strip is arranged on the supporting part and extends into a ring shape along the circumferential direction of the heat preservation device, and the distance between the upper end of the lateral heat preservation strip and the lowest end of the lateral heater is 10-20mm.

According to the ingot furnace provided by the embodiment of the utility model, the heat preservation device is arranged, the side heat preservation plate is arranged in the heat preservation device, the side heater is arranged on the inner side of the side heat preservation plate, the lower end of the side heat preservation plate is provided with the supporting part extending towards the inner side of the heat preservation device, the side heat preservation strip is arranged on the supporting part and extends into a ring shape along the circumferential direction of the heat preservation device, and the distance between the upper end of the side heat preservation strip and the lowest end of the side heater is 10-20mm. Thereby reduce the side heater to the heat radiation of heat preservation device bottom for more heat radiation can be located heat preservation device's top, has reduced the heat radiation that the bottom heated board received, thereby avoids down the furnace body high temperature, avoids the damaged gas leakage of aluminum pipe, has improved the security, has also improved the heat preservation effect simultaneously, has improved the heat utilization ratio, thereby makes the power of heater can reduce, reduces the power consumption.

In some embodiments of the utility model, a first thermal insulation layer is disposed between the bottom thermal insulation plate and the DS blocks.

In some embodiments of the utility model, the first thermal insulation layer is a soft felt or a hard felt, the first thermal insulation layer is arranged on the bottom thermal insulation plate and is spaced apart from the DS block, and when the thermal insulation device is in a zero position, the distance between the first thermal insulation layer and the DS block is 10-20mm.

In some embodiments of the present utility model, the first heat-insulating layer is a hard felt, the first heat-insulating layer is disposed on the lower surface of the DS block and is spaced apart from the bottom heat-insulating plate, and a distance between the first heat-insulating layer and the bottom heat-insulating plate is 10-20mm.

In some embodiments of the utility model, the ingot furnace further comprises: the side heat preservation strips are arranged around the DS blocks, and are located on the radial inner sides of the side heat preservation strips and are 10-15mm away from the side heat preservation strips.

In some embodiments of the present utility model, the upper surface of the DS block has an annular groove extending in the circumferential direction of the DS block, the radially outer side of the annular groove being open, the ingot furnace further comprising: and the plug strip is annular and is arranged in the annular groove.

In some embodiments of the utility model, a second insulating layer is provided between the DS block and the base plate.

In some embodiments of the utility model, the second insulation layer is a soft felt, and the thickness of the second insulation layer is 20-50mm.

In some embodiments of the utility model, a third insulating layer is laid over the base plate.

In some embodiments of the utility model, the third thermal insulation layer is a soft felt, and the thickness of the third thermal insulation layer is 20-50mm.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

FIG. 1 is a cross-sectional view of an ingot furnace according to an embodiment of the utility model;

fig. 2 is a cross-sectional view of an ingot furnace according to an embodiment of the utility model, wherein various dimensional parameters are represented.

Reference numerals:

10. an ingot furnace;

1. a heat preservation device; 11. a bottom insulation board; 111. a first heat-retaining layer; 12. a side thermal insulation board; 13. a top insulation board; 14. a support part;

2. a heater; 21. a side heater; 22. a top heater;

3. a DS block; 31. an annular groove; 32. a second heat-insulating layer;

4. a bottom plate; 41. a third heat-insulating layer;

5. Lateral heat preservation strips;

6. a side thermal insulation strip;

7. A stopper;

81. A graphite electrode; 82. a support column; 83. an alumina tube; 84. suspended ceiling; 85. a hanging cage;

20. the object to be heated.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model. Furthermore, features defining "first", "second" may include one or more such features, either explicitly or implicitly. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

An ingot furnace 10 according to an embodiment of the present utility model is described below with reference to fig. 1 and 2.

As shown in fig. 1 and 2, an ingot furnace 10 according to an embodiment of the present utility model includes a heat preservation device 1, a heater 2, a DS (Dual-Phase Solidification, dual solidification) block 3, a bottom plate 4, and a lateral heat preservation bar 5.

Specifically, referring to fig. 1 and 2, the thermal insulation device 1 includes a bottom thermal insulation plate 11, a side thermal insulation plate 12, and a top thermal insulation plate 13, the top thermal insulation plate 13 being connected with an upper end of the side thermal insulation plate 12, a lower end of the side thermal insulation plate 12 having a support portion 14 extending toward an inside of the thermal insulation device 1, the bottom thermal insulation plate 11 being located radially inward of the support portion 14 and spaced apart from the support portion 14. The heater 2 includes a side heater 21 and a top heater 22, the side heater 21 is provided inside the side heat-insulating plate 12, and the top heater 22 is provided inside the top heat-insulating plate 13.

It will be appreciated that the side heater 21 and the top heater 22 may provide a heat source for the ingot furnace 10, the heated object 20 is located in the heat preservation device 1, the top heat preservation plate 13 may reduce heat dissipation from the top of the heat preservation device 1, the side heat preservation plate 12 may reduce heat dissipation from the side of the heat preservation device 1, and the bottom heat preservation plate 11 may reduce heat dissipation from the bottom of the heat preservation device 1, thereby making the heat preservation effect of the heat preservation device 1 good and improving the heat utilization rate.

Further, as shown in fig. 1 and 2, the bottom thermal insulation plate 11 is located radially inward of the supporting portion 14 and spaced apart from the supporting portion 14, so that the installation interference of the bottom thermal insulation plate 11 with the supporting portion 14 can be avoided.

Further, as shown in fig. 1 and 2, the DS block 3 is disposed above the bottom thermal insulation plate 11 and is disposed at a distance from the bottom thermal insulation plate 11, and the bottom plate 4 is disposed above the DS block 3 and is stacked with the DS block 3. The heated object 20 is located the top of bottom plate 4, and DS piece 3 and bottom plate 4 are used for supporting heated object 20, and DS piece 3 and bottom heated board 11 interval set up, can avoid DS piece 3 and bottom heated board 11's installation interference to avoid DS piece 3 to contact with bottom heated board 11, receive the extrusion, thereby protect bottom heated board 11 structure.

Meanwhile, the ingot furnace 10 further comprises an alumina tube 83, one end of the alumina tube 83 is located in the heat preservation device 1, and the other end of the alumina tube 83 penetrates through the bottom wall of the ingot furnace 10 and is connected with an external temperature measuring device, so that the temperature of the upper surface of the DS block 3 can be measured.

In the present utility model, the object 20 to be heated is a pot side, the pot side is located in the heat preservation device 1, and volatilizable impurities in the pot side can be removed by heating the side heater 21. But because the pan side heat conduction effect is good, a large amount of thermal fields can radiate to bottom heated board and DS piece intermediate position, and the alumina tube of DS piece and bottom heated board intermediate position toasts for a long time high temperature, can break and lead to gas leakage, and a large amount of heat is transmitted the bottom heated board radiation to the lower oven of ingot furnace, leads to lower furnace body temperature high, has the potential safety hazard, and because the pan side heat conduction is effectual for the heat is lost soon, and the electricity consumption is off-high.

The lateral heat preservation strips 5 are arranged on the supporting parts 14 and extend into a ring shape along the circumferential direction of the heat preservation device 1, and the heat radiation of the lateral heater 21 to the bottom of the heat preservation device 1 can be reduced through the arrangement of the lateral heat preservation strips 5, so that more heat radiation can be positioned above the heat preservation device 1, the heat radiation received by the bottom heat preservation plate 11 is reduced, the overhigh temperature of a lower furnace body is avoided, the damage and the air leakage of the alumina tubes 83 are avoided, the safety is improved, the heat preservation effect is improved, and the heat utilization rate is improved, so that the power of the heater 2 can be reduced, and the electricity consumption is reduced.

Further, as shown in fig. 1 and 2, the distance L1 between the upper end of the lateral heat-insulating strip 5 and the lowermost end of the side heater 21 is 10-20mm, such as 10mm, 14mm, 16mm, 20mm, or the like. If the distance between the upper end of the lateral heat-insulating strip 5 and the lowermost end of the side heater 21 is less than 10mm, so that the lateral heat-insulating strip 5 and the side heater 21 are too close to each other, the installation of the lateral heat-insulating strip 5 and the side heater 21 is not facilitated, and the distance between the upper end of the lateral heat-insulating strip 5 and the lowermost end of the side heater 21 is greater than 20mm, the heat-insulating effect is reduced, and the heat radiation to the bottom heat-insulating plate 11 is increased.

Therefore, the distance between the upper end of the lateral heat preservation bar 5 and the lowest end of the lateral heater 21 is 10-20mm, so that the installation interference of the lateral heat preservation bar 5 and the lateral heater 21 can be avoided, the heat preservation effect is ensured, the heat radiation received by the bottom heat preservation plate 11 is reduced, the overhigh temperature of a lower furnace body is avoided, the breakage and the air leakage of the aluminum pipe 83 are avoided, the safety is improved, the heat preservation effect is improved, the heat utilization rate is improved, the power of the heater 2 can be reduced, and the electricity consumption is reduced.

In addition, a plurality of graphite electrodes 81 are arranged at the upper end of the top heat insulation plate 13 in a penetrating manner, one end of each graphite electrode 81 is used for being connected with the heater 2 and supplying power to the heater 2, the other end of each graphite electrode 81 is used for being connected with a copper electrode (not shown), and the other end of each copper electrode is connected with the upper inner wall of the ingot furnace 10, so that the heater 2 and the top heat insulation plate 13 can be fixed relative to the ingot furnace 10. The outer wall surfaces of the side heat-insulating plate 12 and the top heat-insulating plate 13 are respectively connected with a hanging cage 85, the upper end of each hanging cage 85 is connected with a suspended ceiling 84, and the other end of each suspended ceiling 84 is fixedly connected with the upper inner wall of the ingot furnace 10, so that the side heat-insulating plate 12 and the top heat-insulating plate 13 can be fixedly connected with the upper inner wall of the ingot furnace 10. The lower extreme of bottom heated board 11 is connected with a plurality of support columns 82, and the other end of support column 82 and the lower inner wall of ingot furnace 10 to make bottom heated board 11 can be fixed through the lower inner wall connection of support column 82 and ingot furnace 10. Meanwhile, the support columns 82 penetrate through the bottom insulation board 11 and are connected with the DS block 3, so that the DS block 3 can be kept fixed with the bottom insulation board 11.

According to the ingot furnace 10 of the embodiment of the utility model, by arranging the heat preservation device 1, arranging the side heat preservation plate 12 in the heat preservation device 1, arranging the side heater 21 on the inner side of the side heat preservation plate 12, arranging the support part 14 extending towards the inner side of the heat preservation device 1 at the lower end of the side heat preservation plate 12, arranging the side heat preservation strip 5 on the support part 14 and extending into a ring shape along the circumferential direction of the heat preservation device 1, and arranging the distance between the upper end of the side heat preservation strip 5 and the lowest end of the side heater 21 to be 10-20mm. Thereby reduce the side heater 21 to the heat radiation of heat preservation device 1 bottom for more heat radiation can be located the top of heat preservation device 1, has reduced the heat radiation that bottom heated board 11 received, thereby avoid lower furnace body temperature too high, avoid the damaged gas leakage of alumina tube 83, improved the security, also improved the heat preservation effect simultaneously, improved the heat utilization ratio, thereby make the power of heater 2 can reduce, reduce the electricity consumption.

In some embodiments of the present utility model, as shown in fig. 1 and 2, a first heat insulating layer 111 is provided between the bottom heat insulating plate 11 and the DS block 3. From this, reduced the heat and transmitted to bottom heated board 11 from DS piece 3 to further reduced the heat radiation that bottom heated board 11 received, thereby avoided lower furnace body temperature too high, avoid the damaged gas leakage of alumina tube 83, improved the security, also improved the heat preservation effect simultaneously, improved the heat utilization ratio, thereby make the power of heater 2 can reduce, reduce the power consumption.

In some embodiments of the present utility model, as shown in fig. 1 and 2, the first heat-insulating layer 111 is a soft felt or a hard felt, the first heat-insulating layer 111 is provided on the bottom heat-insulating plate 11 and spaced apart from the DS block 3, and the distance L2 between the first heat-insulating layer 111 and the DS block 3 is 10-20mm when the heat-insulating device is in the zero position. It will be appreciated that the first thermal insulation layer 111 is spaced apart from the DS block 3, thereby avoiding contact of the DS block 3 with the first thermal insulation layer 111, being subject to extrusion, resulting in structural failure of the DS block 3 and the first thermal insulation layer 111. Meanwhile, the first insulation layer 111 is arranged on the bottom insulation board 11, and is not required to be arranged on the DS block 3, so that the structure of the DS block 3 can be simplified.

Wherein, the heat preservation device 1 refers to the position of the bottom heat preservation plate 11 and the bottom end of the side heat preservation plate 12 in the zero position in a stop connection way.

The distance between the first heat insulating layer 111 and the DS block 3 is 10-20mm, such as 10mm, 14mm, 16mm or 20 mm. Thereby make and keep suitable interval between first heat preservation 111 and the DS piece 3, both can avoid the installation interference of first heat preservation 111 and bottom heated board 11 and DS piece 3, guaranteed the heat preservation effect again, reduced the thermal radiation that bottom heated board 11 received to avoid lower furnace body temperature too high, avoid the damaged gas leakage of alumina tube 83, improved the security, also improved the heat preservation effect simultaneously, improved the heat utilization ratio, thereby make the power of heater 2 can reduce, reduce the power consumption.

In some embodiments of the present utility model, the first insulation layer 111 is a hard felt, the first insulation layer 111 is provided on the lower surface of the DS block 3 and spaced apart from the bottom insulation plate 11, and the distance between the first insulation layer 111 and the bottom insulation plate 11 is 10-20mm. It can be appreciated that the first heat preservation layer 111 is arranged at the lower end of the DS block 3, and the first heat preservation layer 111 is spaced apart from the bottom heat preservation plate 11, so that the first heat preservation layer 111 and the bottom heat preservation plate 11 can be prevented from being contacted, the first heat preservation layer 111 and the DS block 3 are prevented from being extruded with the bottom heat preservation plate 11, structural damage is caused, meanwhile, the first heat preservation layer 111 is arranged at the lower end of the DS block 3, the first heat preservation layer 111 does not need to be arranged on the bottom heat preservation plate 11, and the structure of the bottom heat preservation plate 11 can be simplified.

The distance between the first heat preservation layer 111 and the bottom heat preservation board 11 is 10-20mm, therefore, the first heat preservation layer 111 and the bottom heat preservation board 11 keep proper distance, installation interference of the first heat preservation layer 111 and the bottom heat preservation board 11 can be avoided, extrusion is avoided, heat preservation effect is guaranteed, heat radiation received by the bottom heat preservation board 11 is reduced, the lower furnace body is prevented from being too high in temperature, damage and air leakage of the alumina tube 83 are avoided, safety is improved, heat preservation effect is improved, heat utilization rate is improved, and accordingly power of the heater 2 can be reduced, and electricity consumption is reduced.

In some embodiments of the present utility model, as shown in fig. 1 and 2, the ingot furnace 10 further includes a side heat-insulating strip 6, the side heat-insulating strip 6 is disposed around the DS block 3, and the side heat-insulating strip 6 is located radially inward of the side heat-insulating strip 5 and has a distance L3 from the side heat-insulating strip 5 of 10-15mm. It will be appreciated that the side thermal insulation strips 6 can block heat radiation from the side surfaces, so that the heat radiation to which the DS blocks 3 are subjected is further reduced, so that the heat radiation to which the bottom thermal insulation plates 11 are subjected is further reduced, the lower furnace body temperature is prevented from being too high, the aluminum oxide tubes 83 are prevented from being damaged and leaking air, the safety is improved, meanwhile, the thermal insulation effect is also improved, the heat utilization rate is improved, and the power of the heater 2 can be reduced, and the electricity consumption is reduced.

The distance between the side heat preservation strip 6 and the side heat preservation strip 5 is 10-15mm, such as 10mm, 12mm, 13mm or 15mm, if the distance between the side heat preservation strip 6 and the side heat preservation strip 5 is less than 10mm, the installation interference between the side heat preservation strip 6 and the side heat preservation strip 5 is easy to be caused, if the distance between the side heat preservation strip 6 and the side heat preservation strip 5 is more than 15mm, the heat insulation effect is not good.

Therefore, the distance between the side heat preservation strip 6 and the side heat preservation strip 5 is 10-15mm, so that a proper distance is kept between the side heat preservation strip 6 and the side heat preservation strip 5, installation interference between the side heat preservation strip 6 and the side heat preservation strip 5 is avoided, and the heat insulation effect is ensured.

In some embodiments of the present utility model, as shown in fig. 1 and 2, the upper surface of the DS block 3 has an annular groove 31 extending along the circumferential direction of the DS block 3, the radial outside of the annular groove 31 is open, the ingot furnace 10 further includes a stopper 7, the stopper 7 is annular, and the stopper 7 is disposed in the annular groove 31.

It will be appreciated that the lower end of the plug 7 abuts against the upper end of the side thermal insulation strip 6, when the thermal insulation device 1 is in the zero position, the inner peripheral wall of the lower end of the side thermal insulation strip 6 abuts against the outer peripheral wall of the first thermal insulation layer 111, thereby the plug 7 forms a sealing structure with the side thermal insulation strip 6 and the first thermal insulation layer 111, thereby further improving the thermal insulation capability, further reducing the heat radiation to which the DS block 3 is subjected, further reducing the heat radiation to which the bottom thermal insulation plate 11 is subjected, thereby avoiding the over-high temperature of the lower furnace body, avoiding the breakage and air leakage of the alumina tube 83, improving the safety, and simultaneously improving the thermal insulation effect and the heat utilization rate, so that the power of the heater 2 can be reduced, and the electricity consumption is reduced.

In some embodiments of the present utility model, as shown in fig. 1 and 2, a second insulation layer 32 is provided between the DS block 3 and the bottom plate 4. From this, reduced heat and transmitted to DS piece 3 from bottom plate 4 to the thermal radiation that DS piece 3 received has been reduced, thereby has further reduced the thermal radiation that bottom heated board 11 received, thereby avoid lower furnace body temperature too high, avoid the damaged gas leakage of alumina tube 83, improved the security, also improved the heat preservation effect simultaneously, improved the heat utilization ratio, thereby make the power of heater 2 can reduce, reduce the electricity consumption.

In some embodiments of the present utility model, as shown in fig. 1 and 2, the second insulation layer 32 is a soft felt, and the thickness B2 of the second insulation layer 32 is 20-50mm, such as 20mm, 30mm, 40mm, 50mm, or the like. Thereby, the second insulation layer 32 has a proper thickness, which saves the cost and ensures the heat insulation effect.

In some embodiments of the utility model, as shown in fig. 1 and 2, a third insulation layer 41 is laid over the base plate 4. From this, reduced the heat and transmitted to bottom plate 4 from heated object 20 to the thermal radiation that bottom plate 4 received has been reduced, thereby reduced the thermal radiation that DS piece 3 received, thereby further reduced the thermal radiation that bottom heated board 11 received, thereby avoid lower furnace body temperature too high, avoid the damaged gas leakage of alumina tube 83, improved the security, also improved the heat preservation effect simultaneously, improved the heat utilization ratio, thereby make the power of heater 2 can reduce, reduce the power consumption.

In some embodiments of the present utility model, as shown in fig. 1 and 2, the third insulation layer 41 is a soft felt, and the thickness B3 of the third insulation layer 41 is 20-50mm, such as 20mm, 30mm, 40mm, 50mm, or the like. Thereby, the third heat insulating layer 41 has a proper thickness, which saves the cost and ensures the heat insulating effect.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. An ingot furnace, characterized by comprising:

The heat preservation device comprises a bottom heat preservation plate, a side heat preservation plate and a top heat preservation plate, wherein the top heat preservation plate is connected with the upper end of the side heat preservation plate, the lower end of the side heat preservation plate is provided with a supporting part extending towards the inner side of the heat preservation device, and the bottom heat preservation plate is positioned on the radial inner side of the supporting part and is spaced from the supporting part;

the heater comprises a side heater and a top heater, the side heater is arranged on the inner side of the side heat-insulating plate, and the top heater is arranged on the inner side of the top heat-insulating plate;

The DS block is arranged above the bottom heat-insulating plate and is arranged at intervals with the bottom heat-insulating plate;

the bottom plate is arranged above the DS block and is overlapped with the DS block;

The lateral heat preservation strip is arranged on the supporting part and extends into a ring shape along the circumferential direction of the heat preservation device, and the distance between the upper end of the lateral heat preservation strip and the lowest end of the lateral heater is 10-20mm.

2. The ingot furnace of claim 1, wherein a first thermal insulation layer is provided between the bottom thermal insulation plate and the DS block.

3. The ingot furnace of claim 2, wherein the first heat-insulating layer is a soft felt or a hard felt, the first heat-insulating layer is arranged on the bottom heat-insulating plate and is spaced apart from the DS block, and when the heat-insulating device is in a zero position, the distance between the first heat-insulating layer and the DS block is 10-20mm.

4. The ingot furnace of claim 2, wherein the first heat-insulating layer is a hard felt, the first heat-insulating layer is arranged on the lower surface of the DS block and is spaced apart from the bottom heat-insulating plate, and when the heat-insulating device is in a zero position, the distance between the first heat-insulating layer and the bottom heat-insulating plate is 10-20mm.

5. The ingot furnace of claim 1, further comprising:

The side heat preservation strips are arranged around the DS blocks, and are located on the radial inner sides of the side heat preservation strips and are 10-15mm away from the side heat preservation strips.

6. The ingot furnace of claim 1, wherein the upper surface of the DS block has an annular groove extending in the circumferential direction of the DS block, the radially outer side of the annular groove being open, the ingot furnace further comprising:

And the plug strip is annular and is arranged in the annular groove.

7. The ingot furnace of claim 1, wherein a second insulating layer is provided between the DS blocks and the bottom plate.

8. The ingot furnace of claim 7, wherein the second insulating layer is a soft felt, and the thickness of the second insulating layer is 20-50mm.

9. The ingot furnace of claim 1, wherein a third insulating layer is laid over the bottom plate.

10. The ingot furnace of claim 9, wherein the third heat-insulating layer is a soft felt, and the thickness of the third heat-insulating layer is 20-50mm.