CN202968753U - Improved polycrystalline silicon ingot casting crucible protective device - Google Patents
Improved polycrystalline silicon ingot casting crucible protective device Download PDFInfo
- Publication number
- CN202968753U CN202968753U CN201220501325.4U CN201220501325U CN202968753U CN 202968753 U CN202968753 U CN 202968753U CN 201220501325 U CN201220501325 U CN 201220501325U CN 202968753 U CN202968753 U CN 202968753U
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- Prior art keywords
- backplate
- crucible
- guard plate
- protective device
- assembly
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- 229910021420 polycrystalline silicon Inorganic materials 0.000 title claims abstract description 35
- 238000005266 casting Methods 0.000 title abstract description 30
- 230000001681 protective effect Effects 0.000 title abstract 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 35
- 229910002804 graphite Inorganic materials 0.000 claims description 35
- 239000010439 graphite Substances 0.000 claims description 35
- 229920005591 polysilicon Polymers 0.000 claims description 20
- 239000000463 material Substances 0.000 claims description 11
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 abstract description 19
- 229910052710 silicon Inorganic materials 0.000 abstract description 19
- 239000010703 silicon Substances 0.000 abstract description 19
- 230000000712 assembly Effects 0.000 abstract 2
- 238000000429 assembly Methods 0.000 abstract 2
- 239000012530 fluid Substances 0.000 abstract 1
- 239000010453 quartz Substances 0.000 description 19
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 19
- 238000000034 method Methods 0.000 description 17
- 238000007689 inspection Methods 0.000 description 14
- 239000002994 raw material Substances 0.000 description 9
- 238000002360 preparation method Methods 0.000 description 3
- 238000007711 solidification Methods 0.000 description 3
- 230000008023 solidification Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000001771 impaired effect Effects 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 239000002210 silicon-based material Substances 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Silicon Compounds (AREA)
Abstract
The utility model discloses an improved polycrystalline silicon ingot casting crucible protective device. The improved polycrystalline silicon ingot casting crucible protective device comprises guard plate assemblies and is formed by overlaying an upper guard plate assembly and a lower guard plate assembly, wherein each guard plate assembly is formed by surrounding multiple guard plates, and an overflow hole is formed on the bottom side of each guard plate. The improved polycrystalline silicon ingot casting crucible protective device can carry out matched adjustment by changing a usage mode of the protective device according to the height of a crucible and different charge amounts, switching can be easily realized, flexibility is high, and cost is greatly saved; secondly, the two guard plate assemblies can be in good contact with the crucible, and overflow of the crucible caused by poor heat shrinkable property in an ingot casting process can be reduced; and finally, the protective device is adopted for ingot casting, if silicon fluid overflows, damage of the lower guard plate assembly can not extend to the upper guard plate assembly, and the upper guard plate assembly can not be damaged, so that loss caused by damage of the protective device can be greatly reduced.
Description
Technical field
The utility model belongs to area of solar cell, is specifically related to a kind of modified version polysilicon ingot crucible safety guard.
Background technology
At present in the preparation method of the polysilicon that uses of photovoltaic, directional solidification method is because the silicon ingot list stove weight of its output is large, and average energy consumption is low and be widely used.When utilizing directional solidification method to carry out the polysilicon casting, need to use quartz crucible splendid attire silicon raw material, the quartz crucible that installs the silicon material is sent in ingot furnace heated, complete the process of fusing and directional solidification growth of polycrystalline silicon.The top temperature of whole process reaches more than 1500 ℃, and quartz crucible is beginning to soften under the environment of 1200 ℃, therefore needs the graphite backplate to protect.
Traditional crucible guard boards can only play the effect of crucible protection, generally places four graphite backplates in the quartz crucible surrounding, utilizes nut fixedly to be spliced.In silicon raw material fusing with in process of growth, because the quality of quartz crucible own has flaw, perhaps collision appears in transit in crucible, and perhaps charging process collides with to crucible and waits extremely, may cause that crucible breaks, thus generation overflow accident.The overflow accident gently causes the waste of silicon material in case occur, and backplate destroys, and is heavy cause security incident.According to the service condition of present conventional crucibles backplate, it can not effectively alleviate the incidence of silicon ingot overflow; In case when overflow occured, whole backplate can be completed damage, loses huge.
The patent No. is CN202181217U, and name of patent application is improved device for crucible guard boards, and the improved device for crucible guard boards that can avoid occuring in casting ingot process overflow after a kind of improvement is provided.Wherein: the bottom of every backplate is respectively equipped with two overflow weirs, and the top of every backplate is respectively arranged with two matrix air discharge ducts, and the matrix air discharge duct of backplate top setting has identical length and width.From structure, there is no the difference of essence with traditional backplate, all can not play obvious improvement effect to the loss that strick precaution and the overflow of overflow causes.
Therefore, seek a kind of incidence that can reduce overflow in the ingot casting process, maybe can reduce the loss that overflow causes, the crucible guard boards device that can improve again the silicon ingot quality has larger meaning to whole polycrystalline silicon ingot casting field.
The utility model content
Technical problem to be solved in the utility model is to provide a kind of modified version polysilicon ingot crucible safety guard, can reduce the incidence of overflow in the ingot casting process and can reduce the loss that overflow causes, and can improve the quality of silicon ingot.
Above-mentioned technical problem of the present utility model realizes by following technique means: a kind of modified version polysilicon ingot crucible safety guard, described safety guard is comprised of upper and lower two-layer backplate assembly stack, described upper and lower two-layer backplate assembly is surrounded by a plurality of backplates, is equipped with overflow weir on the base of each backplate.
in fact, for satisfying the requirement of different crucible height and charge amount, except with upper, when lower two-layer backplate assembly is used in conjunction with, can also only use upper strata backplate assembly, also can only use lower floor's backplate assembly, the backplate that can also prepare as required different heights, on needs adopt, when lower two-layer backplate assembly stack is used, on, the length and width size of lower two-layer backplate assembly is preferably identical, thickness is preferably consistent, on, lower two-layer backplate assembly can directly be superimposed naturally, in employing, the optimum contact can occur with crucible in the design of lower two-layer backplate assembly better, reduce the overflow that crucible causes because heat-shrinkable is bad in the ingot casting process, if occur silicon hydrorrhea stream in the ingot casting process, the damage of bottom guard plate can't extend to the top backplate, and it is impaired that the top backplate can be avoided, and damages thereby can largely reduce backplate the loss that brings.
As a kind of preferred version of the present utility model, the base of each backplate is provided with two overflow weirs.Arrange like this, make two overflow weir positions comparatively near the crucible edge, when overflow occurs, can guarantee that silicon liquid flows out the soonest, thereby the fusing overflow line gives the alarm, and the site operation personnel is in time taken measures, the loss that infringement and the overflow of stove is caused with minimizing.
In the backplate assembly of upper strata described in the utility model, the height of each backplate is identical, and it is highly 380～500mm, and in described lower floor backplate assembly, the height of each backplate is also identical, and it is highly 80～160mm.
As another kind of preferred version of the present utility model, in upper and lower layer backplate assembly, the quantity of backplate is four.
The material of backplate and nut is preferably high temperature resistant by graphite etc., and the material that thermal conductivity is good is prepared from, and the material of backplate described in the utility model and nut is preferably graphite.
As a kind of improvement of the present utility model: the top at upper strata backplate assembly also is provided with cover plate.Can effectively improve like this gas circulation in the ingot casting operational process, the purifying polycrystalline silicon growing environment reduces the foreign matter content in silicon ingot relatively, and the battery conversion efficiency of preparation improves.
Compared with prior art, the utlity model has following advantage:
(1) can by changing the use-pattern of crucible safety guard, satisfy the requirement of different crucible height and charge amount;
(2) the optimum contact can better occur with crucible in the design of two-layer backplate assembly, reduces the overflow that crucible causes because heat-shrinkable is bad in the ingot casting process;
(3) if overflow occurs, the gap of the overflow weir of different heights and two-layer backplate assembly can guarantee that silicon solution flowed out in the fastest time, thereby the fusing overflow line gives the alarm, and the site operation personnel is in time taken measures, to reduce the infringement to stove;
(4) after the generation overflow, the damage of bottom guard plate can't extend to the top backplate, and it is impaired that the top backplate can be avoided, and damages thereby can largely reduce backplate the loss that brings;
(5) safety guard in the utility model can be combined with cover plate, can effectively improve the gas circulation in the ingot casting operational process, and the purifying polycrystalline silicon growing environment reduces the foreign matter content in silicon ingot relatively, and the battery conversion efficiency of preparation improves.
Description of drawings
Fig. 1 is the stereographic map of the modified version polysilicon ingot crucible safety guard that provides in embodiment 1-7;
Fig. 2 is wherein front view of Fig. 1.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further described.
As shown in Fig. 1-2, the modified version polysilicon ingot crucible safety guard that the present embodiment provides, comprise the backplate assembly, safety guard is comprised of upper strata backplate assembly 1 and 2 stacks of lower floor's backplate assembly, upper strata backplate assembly 1 and lower floor's backplate assembly 2 are surrounded by a plurality of backplates, the present embodiment at the middle and upper levels in backplate assembly and lower floor's backplate assembly the quantity of backplate be four, be equipped with overflow weir 3 on the base of each backplate, in the present embodiment, the number of overflow weir is two.
its at the middle and upper levels the height of each backplate in backplate assembly 1 be 430mm, one of them side of each backplate is provided with three screws 4, also be provided with suitable screw (not shown) on the end face of a side of adjacent backplate, adjacent backplate passes two screws by nut 5 and fixes, lower same, the height of each backplate of lower floor's backplate assembly 2 is 120mm, one of them side of each backplate is provided with a screw 4, with also be provided with the screw suitable with screw 4 on the side that is provided with screw 4 adjacent backplates, adjacent backplate passes two screws 4 by nut 5 and fixes, lower same, the material of backplate and nut is graphite.
During use, quartz crucible through advancing inspection and spot inspection qualified after, lifted by operator and be placed on the graphite base plate, the silicon raw material is packed in quartz crucible, require splendid attire complete according to charging.Choose four backplates, surround crucible and be arranged on the graphite base plate, fix with the graphite nut, consist of lower floor's backplate assembly 2; Four backplates are placed in stack thereon, and fix with the graphite nut, consist of upper strata backplate assembly 1, send in ingot furnace after installing, and vacuumize rear operation casting ingot process, complete the polycrystalline silicon ingot casting process.
As shown in Fig. 1-2, the modified version polysilicon ingot crucible safety guard that the present embodiment provides, comprise the backplate assembly, safety guard is comprised of upper strata backplate assembly 1 and 2 stacks of lower floor's backplate assembly, upper strata backplate assembly 1 and lower floor's backplate assembly 2 are surrounded by a plurality of backplates, are four in the present embodiment, are equipped with overflow weir 3 on the base of each backplate, in the present embodiment, the number of overflow weir is two, and the material of backplate and nut is selected graphite.
During use, quartz crucible through advancing inspection and spot inspection qualified after, lifted by operator and be placed on the graphite base plate, the silicon raw material is packed in quartz crucible, splendid attire is complete as requested, chooses the backplate that four tile heights are 160mm, surrounds crucible and is arranged on base plate, fix with the graphite nut, consist of lower floor's backplate assembly 2; It is the backplate of 380mm that four tile heights are placed in stack thereon, and fixes with the graphite nut, consists of upper strata backplate assembly 1, sends in ingot furnace after installing, and vacuumizes rear operation casting ingot process, completes the polycrystalline silicon ingot casting process.
Embodiment 3
As shown in Fig. 1-2, the modified version polysilicon ingot crucible safety guard that the present embodiment provides, comprise the backplate assembly, safety guard is comprised of upper strata backplate assembly 1 and 2 stacks of lower floor's backplate assembly, upper strata backplate assembly 1 and lower floor's backplate assembly 2 are surrounded by a plurality of backplates, are four in the present embodiment, are equipped with overflow weir 3 on the base of each backplate, in the present embodiment, the number of overflow weir is two, and the material of backplate and nut is graphite.
During use, quartz crucible through advancing inspection and spot inspection qualified after, lifted by operator and be placed on the graphite base plate, the silicon raw material is packed in quartz crucible, splendid attire is complete as requested, chooses the backplate that four tile heights are 140mm, surrounds crucible and is arranged on base plate, fix with the graphite nut, consist of lower floor's backplate assembly 2; Four tile heights of stack placement thereon are the backplate of 400mm and fix with the graphite nut, consist of upper strata backplate assembly 1, send in ingot furnace after installing, and vacuumize rear operation casting ingot process, complete the polycrystalline silicon ingot casting process.
As shown in Fig. 1-2, the modified version polysilicon ingot crucible safety guard that the present embodiment provides, comprise the backplate assembly, safety guard is comprised of upper strata backplate assembly 1 and lower floor's backplate assembly 2, upper strata backplate assembly 1 and lower floor's backplate assembly 2 are surrounded by a plurality of backplates, are four in the present embodiment, are equipped with overflow weir 3 on the base of each backplate, in the present embodiment, the number of overflow weir is two, and the material of backplate and nut is graphite.
During use, quartz crucible through advancing inspection and spot inspection qualified after, lifted by operator and be placed on the graphite base plate, the silicon raw material is packed in quartz crucible, splendid attire is complete as requested, chooses the backplate that four tile heights are 140mm, surrounds crucible and is arranged on base plate, fix with the graphite nut, consist of lower floor's backplate assembly 2; It is the backplate of 420mm that four tile heights are placed in stack thereon, and fixes with the graphite nut, consists of upper strata backplate assembly 1, sends in ingot furnace after installing, and vacuumizes rear operation casting ingot process, completes the polycrystalline silicon ingot casting process.
As shown in Fig. 1-2, the modified version polysilicon ingot crucible safety guard that the present embodiment provides, comprise the backplate assembly, safety guard is comprised of upper strata backplate assembly 1 and lower floor's backplate assembly 2, upper strata backplate assembly 1 and lower floor's backplate assembly 2 are surrounded by a plurality of backplates, are four in the present embodiment, are equipped with overflow weir 3 on the base of each backplate, in the present embodiment, the number of overflow weir is two, and the material of backplate and nut is graphite.
During use, quartz crucible through advancing inspection and spot inspection qualified after, lifted by operator and be placed on the graphite base plate, the silicon raw material is packed in quartz crucible, splendid attire is complete as requested, chooses the backplate that four tile heights are 120mm, surrounds crucible and is arranged on base plate, fix with the graphite nut, consist of lower floor's backplate assembly 2; It is the backplate of 440mm that four tile heights are placed in stack thereon, and fixes with the graphite nut, consists of upper strata backplate assembly 1; Add c/c(graphite at last on the backplate assembly of upper strata) the cover plate (not shown), send in ingot furnace after installing, vacuumize rear operation casting ingot process, complete the polycrystalline silicon ingot casting process.
Embodiment 6
As shown in Fig. 1-2, the modified version polysilicon ingot crucible safety guard that the present embodiment provides, comprise the backplate assembly, safety guard is comprised of upper strata backplate assembly 1 and lower floor's backplate assembly 2, upper strata backplate assembly 1 and lower floor's backplate assembly 2 are surrounded by a plurality of backplates, are four in the present embodiment, are equipped with overflow weir 3 on the base of each backplate, in the present embodiment, the number of overflow weir is two, and the material of backplate and nut is graphite.
During use, quartz crucible through advancing inspection and spot inspection qualified after, lifted by operator and be placed on the graphite base plate, the silicon raw material is packed in quartz crucible, splendid attire is complete as requested, chooses the backplate that four tile heights are 80mm, surrounds crucible and is arranged on base plate, fix with the graphite nut, consist of lower floor's backplate assembly 2; It is the backplate of 500mm that four tile heights are placed in stack thereon, and fixes with the graphite nut, consists of upper strata backplate assembly 1; Add at last c/c cover plate (not shown) on the backplate assembly of upper strata, send in ingot furnace after installing, vacuumize rear operation casting ingot process, complete the polycrystalline silicon ingot casting process.
Embodiment 7
As shown in Fig. 1-2, the modified version polysilicon ingot crucible safety guard that the present embodiment provides, comprise the backplate assembly, safety guard is comprised of upper strata backplate assembly 1 and lower floor's backplate assembly 2, upper strata backplate assembly 1 and lower floor's backplate assembly 2 are surrounded by a plurality of backplates, are four in the present embodiment, are equipped with overflow weir 3 on the base of each backplate, in the present embodiment, the number of overflow weir is two, and the material of backplate and nut is graphite.
Quartz crucible through advancing inspection and spot inspection qualified after, lifted by operator and be placed on the graphite base plate, the silicon raw material is packed in quartz crucible, splendid attire is complete as requested, choose the backplate that four tile heights are 100mm, surround crucible and be arranged on base plate, fix with the graphite nut, consist of lower floor's backplate assembly 2; It is the backplate of 480mm that four tile heights are placed in stack thereon, and fixes with the graphite nut, consists of upper strata backplate assembly 1; Add at last c/c cover plate (not shown) on upper strata backplate assembly 1, send in ingot furnace after installing, vacuumize rear operation casting ingot process, complete the polycrystalline silicon ingot casting process.
In fact, as common safety guard, according to the difference of crucible height and charge amount, also can only adopt upper strata backplate assembly 1 or lower floor's backplate assembly 2 in the utility model to use as safety guard.
More than enumerating specific embodiment describes the utility model.It is to be noted; above embodiment is only for the utility model is described in further detail; do not represent protection domain of the present utility model, other people still belong to protection domain of the present utility model according to nonessential modification and adjustment that prompting of the present utility model is made.
Claims (6)
1. modified version polysilicon ingot crucible safety guard, comprise the backplate assembly, it is characterized in that: described safety guard is comprised of upper and lower two-layer backplate assembly stack, and described upper and lower two-layer backplate assembly is surrounded by a plurality of backplates, is equipped with overflow weir on the base of each backplate.
2. want 1 described modified version polysilicon ingot crucible safety guard according to right, it is characterized in that: the base of each backplate is provided with two overflow weirs.
3. modified version polysilicon ingot crucible safety guard according to claim 1 and 2, it is characterized in that: in the backplate assembly of described upper strata, the height of each backplate is identical, it is highly 380 ~ 500mm, and in described lower floor backplate assembly, the height of each backplate is also identical, and it is highly 80 ~ 160mm.
4. modified version polysilicon ingot crucible safety guard according to claim 3, it is characterized in that: in described upper and lower two-layer backplate assembly, the quantity of backplate is four.
5. modified version polysilicon ingot crucible safety guard according to claim 4, it is characterized in that: the material of described backplate and screw is graphite.
6. modified version polysilicon ingot crucible safety guard according to claim 1, it is characterized in that: the top at upper strata backplate assembly also is provided with cover plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220501325.4U CN202968753U (en) | 2012-09-28 | 2012-09-28 | Improved polycrystalline silicon ingot casting crucible protective device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220501325.4U CN202968753U (en) | 2012-09-28 | 2012-09-28 | Improved polycrystalline silicon ingot casting crucible protective device |
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| CN202968753U true CN202968753U (en) | 2013-06-05 |
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| CN201220501325.4U Expired - Lifetime CN202968753U (en) | 2012-09-28 | 2012-09-28 | Improved polycrystalline silicon ingot casting crucible protective device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103556213A (en) * | 2013-11-14 | 2014-02-05 | 乐山新天源太阳能科技有限公司 | Thermal field structure of polycrystalline silicon ingot furnace |
| CN103556221A (en) * | 2013-11-14 | 2014-02-05 | 乐山新天源太阳能科技有限公司 | Polycrystalline silicon ingot furnace |
| CN103981570A (en) * | 2014-06-04 | 2014-08-13 | 高佳太阳能股份有限公司 | Silicon liquid overflow alarm structure of polycrystalline silicon ingot furnace |
| CN105133008A (en) * | 2015-10-15 | 2015-12-09 | 晶科能源有限公司 | Polycrystalline silicon ingot casting device and preparing method of silicon ingot |
| CN105177709A (en) * | 2015-08-28 | 2015-12-23 | 江苏美科硅能源有限公司 | Irregular-shaped protective plate for semi-fused efficient production of G6 silicon ingot |
| CN105332051A (en) * | 2015-10-30 | 2016-02-17 | 江苏美科硅能源有限公司 | Bottom seed crystal protecting device for polycrystal casting |
-
2012
- 2012-09-28 CN CN201220501325.4U patent/CN202968753U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103556213A (en) * | 2013-11-14 | 2014-02-05 | 乐山新天源太阳能科技有限公司 | Thermal field structure of polycrystalline silicon ingot furnace |
| CN103556221A (en) * | 2013-11-14 | 2014-02-05 | 乐山新天源太阳能科技有限公司 | Polycrystalline silicon ingot furnace |
| CN103556221B (en) * | 2013-11-14 | 2016-10-19 | 乐山新天源太阳能科技有限公司 | Polycrystalline silicon ingot or purifying furnace |
| CN103556213B (en) * | 2013-11-14 | 2017-01-04 | 乐山新天源太阳能科技有限公司 | A kind of thermal field structure of polycrystalline silicon casting furnace |
| CN103981570A (en) * | 2014-06-04 | 2014-08-13 | 高佳太阳能股份有限公司 | Silicon liquid overflow alarm structure of polycrystalline silicon ingot furnace |
| CN105177709A (en) * | 2015-08-28 | 2015-12-23 | 江苏美科硅能源有限公司 | Irregular-shaped protective plate for semi-fused efficient production of G6 silicon ingot |
| CN105133008A (en) * | 2015-10-15 | 2015-12-09 | 晶科能源有限公司 | Polycrystalline silicon ingot casting device and preparing method of silicon ingot |
| CN105332051A (en) * | 2015-10-30 | 2016-02-17 | 江苏美科硅能源有限公司 | Bottom seed crystal protecting device for polycrystal casting |
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