CN103112855A - Production method of solar-grade obtuse fused silicon micropowder for photovoltaic industry - Google Patents
Production method of solar-grade obtuse fused silicon micropowder for photovoltaic industry Download PDFInfo
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- CN103112855A CN103112855A CN 201210070479 CN201210070479A CN103112855A CN 103112855 A CN103112855 A CN 103112855A CN 201210070479 CN201210070479 CN 201210070479 CN 201210070479 A CN201210070479 A CN 201210070479A CN 103112855 A CN103112855 A CN 103112855A
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Abstract
The invention discloses a production method of solar-grade obtuse fused silicon micropowder for photovoltaic industry. The product belongs to the field of finishing of high-quality high-purity quartz sand. High-quality high-purity quartz sand used as a raw material is subjected to magnetic separation, high-temperature sintering fusing, mechanical shock, crushing, separation, grinding, magnetic separation and other techniques to obtain the solar-grade obtuse fused silicon micropowder. The technical process has the advantages of simple technique and no emission of toxic or harmful gas and liquid, can be used for mass production of high-quality solar-grade obtuse fused silicon micropowder for photovoltaic industry. The product is a good-quality material for manufacturing polysilicon slicing crucibles of a solar photovoltaic power generation system, and can also be used as an integrated circuit plastic packaging material as well as a raw material for manufacturing supervoltage large-scale electric switches.
Description
Technical field
The invention belongs to quartzite precision work field, relate in particular to a kind of take quartzite as primary industry production photovoltaic industry the method with solar level obtuse angle molten silicon micro mist.
Background technology
Fused quartz is the non-crystalline state of silicon-dioxide, the content of its silicon-dioxide must not be less than 99.8%, during production with selected high grade quartz sand in the furnace high-temperature melting, melt temperature is 1800 ℃-1900 ℃, fusion time approximately becomes molten state after 12 hours, become solid-state fused quartz after cooling, fused quartz has the series of advantages such as use temperature is high, thermal expansivity is low, wear resisting property is good, hardness is high, the printing opacity refrangibility is good, piezoelectric property is excellent.The product of fused quartz has: the fused quartz sand of all size and different purposes, fused quartz piece and molten silicon micro mist.The molten silicon micro mist is the micro mist that is formed through multiple tracks processes such as fragmentation, magnetic separation, mechanical shock, grinding, magnetic separation by fused quartz, it is a kind of nontoxic, tasteless, free of contamination ceramic, its kind has: common molten silicon micro mist, electrician's level molten silicon micro mist, electronic-grade molten silicon micro mist, ultra-fine molten silicon micro mist, solar level obtuse angle molten silicon micro mist etc. is widely used in the fields such as chemical industry, electronics, unicircuit, electrical equipment, plastics, rubber, national defence.the present invention is a kind of photovoltaic industry with solar level obtuse angle molten silicon micro mist, so-called solar level refers to that the content of its silicon-dioxide is more than 99.9%, the obtuse angle refers to that the shape that the particle of silicon powder can be seen is polygon shape under Electronic Speculum, ellipticity but not radial spine thorn-like, this product is to select high-purity natural quartzy, through high melt, the fused quartz of cooling rear formation carries out the micro mist that precision work forms, compare with common molten silicon micro mist that to have purity high, thermal expansivity is little, low-activity, the advantages such as resistance to chemical attack, its outward appearance is white powder, unit weight is the 200-250 kilograms per cubic meter, fineness is 400 orders, except being used in the photovoltaic solar industry, also can be used as the integrated circuit plastic packaging material, the raw material of making the extensive electric switch of extra-high pressure uses.The production method that the multiple fused quartz silicon powder of bibliographical information is arranged in recent years; On January 19th, 2009, Lianyungang Donghai Mingyou Hi-Tech Silica Co., Ltd (contriver Liu Bao'an) has applied for that the patent No. is 200910029075, name is called the patent of invention of " a kind of production method of electronic grade amorphous silicon powder ", but the raw material of its use, the finished product and production technique are equal different with the present invention, up to the present, not yet see with production method of the present invention and produce photovoltaic industry with the relevant report of solar level obtuse angle molten silicon micro mist.The present invention is take the high-quality glass sand as raw material, process by series of process such as magnetic separation, high temperature sintering melting, mechanical shock, fragmentation, sorting, grinding, magnetic separation, the major advantage of this technical process is: technique is simple, without toxic and harmful and liquid discharge, can be mass and produce high-quality photovoltaic industry with solar level obtuse angle molten silicon micro mist.
Summary of the invention
The problem that the present invention mainly solves is to provide a kind of suitability for industrialized production photovoltaic industry with the method for solar level obtuse angle molten silicon micro mist, the method is take the high-quality glass sand as raw material, produce photovoltaic industry with solar level obtuse angle molten silicon micro mist by techniques such as magnetic separation, high temperature sintering melting, mechanical shock, fragmentation, sorting, grinding, magnetic separation, the major advantage of this technical process is: technique is simple, easy to operate, level of automation is high, without obnoxious flavour and liquid discharge, good product quality.The raw material that the present invention uses is the high-quality glass sand.
The present invention can be achieved through the following technical solutions:
The production method of a kind of photovoltaic industry use solar level obtuse angle molten silicon micro mist is characterized in that being made of following steps:
(1) the high-quality glass sand is sent into magnetic separator, the quartz sand that utilizes magnetic field in magnetic separator will contain magnetic and metal separates removal, and quartz sand is 0.2-0.3 hour by the time of magnetic separator.
(2) the high-quality glass sand after magnetic separation is sent into high temperature sintering furnace, transferring the interior temperature of stove is 1820 ℃-1880 ℃, fusing time is 12-14 hour, obtain the high purity quartz molten mass, fusing stops powering to high temperature sintering furnace after finishing, be cooled to the high-purity fused quartz of solid that normal temperature obtains bulk after cooling, first after becoming fritter, mechanical shock sends into crusher in crushing, obtain diameter less than the fused quartz sand of 4mm after screening, all particle diameters return to crusher fragmentation again greater than the fused quartz sand particle of 4mm.
(3) diameter being delivered to shredder less than the fused quartz sand of 4mm grinds, charging and the discharging speed of controlling shredder are balanced, the quantity of feeding and discharging be the 1.5-1.8 ton/hour, the rotating speed of shredder is 23-25 rev/min, milling time is 138-142 minute, powder after shredder grinds is delivered to vibratory screening apparatus by induced draft fan wind and is sieved, powder is through after bolting, granularity is counted less than 400 purpose powders and is reentered through the feed back pipe and carry out regrind in shredder, the granularity number reserves for other use greater than 400 purpose silicon powders, granularity is that 400 purpose molten silicon micro mists enter collector.
(4) be that 400 purpose molten silicon micro mists are sent into magnetic separator again with the granularity in collector, the molten silicon micro mist that will contain magnetic, containing metal and metal oxide separates removal, the magnetic separation time is 0.1-0.2 hour, obtain granularity after magnetic separation and be 400 purpose photovoltaics with solar level obtuse angle molten silicon micro mist, the content of its silicon-dioxide obtains finished product more than 99.9% after packing.
When the melt temperature in above-mentioned steps (2) is 1820 ℃, corresponding fusing time is 14 hours; When melt temperature is 1850 ℃, corresponding fusing time is 13 hours; When melt temperature is 1880 ℃, corresponding fusing time is 12 hours.
When in above-mentioned steps (3), the rotating speed of shredder was 23 rev/mins, corresponding milling time was 142 minutes; When the rotating speed of shredder was 24 rev/mins, corresponding milling time was 140 minutes; When the rotating speed of shredder was 25 rev/mins, corresponding milling time was 138 minutes.
The invention has the beneficial effects as follows: a kind of photovoltaic production method with solar level obtuse angle molten silicon micro mist is provided, this production method has: facility investment is few, production cost is low, without the sewage exhaust gas emission, can be mass out high-quality photovoltaic with solar level obtuse angle molten silicon micro mist, product is the quality matetrial of making solar photovoltaic generation system polysilicon section crucible, the raw material use that also can be used as the integrated circuit plastic packaging material, makes the extensive electric switch of extra-high pressure.
Embodiment
Below in conjunction with specific embodiment, the present invention is described in further detail.
Embodiment 1
the high-quality glass sand is sent into magnetic separator, and the quartz sand that utilizes magnetic field in magnetic separator will contain magnetic and metal separates removal, and quartz sand is 0.2-0.3 hour by the time of magnetic separator, high-quality glass sand after magnetic separation is sent into high temperature sintering furnace, transferring the interior temperature of stove is 1820 ℃, fusing time is 14 hours, obtain the high purity quartz molten mass, stop after fusing finishes to the high temperature sintering furnace power supply, be cooled to the high-purity fused quartz of solid that normal temperature obtains bulk after cooling, first send into crusher in crushing after mechanical shock becomes fritter, obtain diameter less than the fused quartz sand of 4mm after screening, all particle diameters return to crusher fragmentation again greater than the fused quartz sand particle of 4mm, diameter is delivered to shredder less than the fused quartz sand of 4mm to be ground, charging and the discharging speed of controlling shredder are balanced, the quantity of feeding and discharging be the 1.5-1.8 ton/hour, the rotating speed of shredder is 23 rev/mins, milling time is 142 minutes, powder after shredder grinds is delivered to vibratory screening apparatus by induced draft fan wind and is sieved, powder is through after bolting, granularity is counted less than 400 purpose powders and is reentered through the feed back pipe and carry out regrind in shredder, the granularity number reserves for other use greater than 400 purpose silicon powders, granularity is that 400 purpose molten silicon micro mists enter collector, be that 400 purpose molten silicon micro mists are sent into magnetic separator again with the granularity in collector, the molten silicon micro mist that will contain magnetic, containing metal and metal oxide separates removal, the magnetic separation time is 0.1-0.2 hour, obtain granularity after magnetic separation and be 400 purpose photovoltaics with solar level obtuse angle molten silicon micro mist, the content of its silicon-dioxide obtains finished product more than 99.9% after packing.
Embodiment 2
the high-quality glass sand is sent into magnetic separator, and the quartz sand that utilizes magnetic field in magnetic separator will contain magnetic and metal separates removal, and quartz sand is 0.2-0.3 hour by the time of magnetic separator, high-quality glass sand after magnetic separation is sent into high temperature sintering furnace, transferring the interior temperature of stove is 1850 ℃, fusing time is 13 hours, obtain the high purity quartz molten mass, stop after fusing finishes to the high temperature sintering furnace power supply, be cooled to the high-purity fused quartz of solid that normal temperature obtains bulk after cooling, first send into crusher in crushing after mechanical shock becomes fritter, obtain diameter less than the fused quartz sand of 4mm after screening, all particle diameters return to crusher fragmentation again greater than the fused quartz sand particle of 4mm, diameter is delivered to shredder less than the fused quartz sand of 4mm to be ground, charging and the discharging speed of controlling shredder are balanced, the quantity of feeding and discharging be the 1.5-1.8 ton/hour, the rotating speed of shredder is 24 rev/mins, milling time is 140 minutes, powder after shredder grinds is delivered to vibratory screening apparatus by induced draft fan wind and is sieved, powder is through after bolting, granularity is counted less than 400 purpose powders and is reentered through the feed back pipe and carry out regrind in shredder, the granularity number reserves for other use greater than 400 purpose silicon powders, granularity is that 400 purpose molten silicon micro mists enter collector, be that 400 purpose molten silicon micro mists are sent into magnetic separator again with the granularity in collector, the molten silicon micro mist that will contain magnetic, containing metal and metal oxide separates removal, the magnetic separation time is 0.1-0.2 hour, obtain granularity after magnetic separation and be 400 purpose photovoltaics with solar level obtuse angle molten silicon micro mist, the content of its silicon-dioxide obtains finished product more than 99.9% after packing.
Embodiment 3
the high-quality glass sand is sent into magnetic separator, and the quartz sand that utilizes magnetic field in magnetic separator will contain magnetic and metal separates removal, and quartz sand is 0.2-0.3 hour by the time of magnetic separator, high-quality glass sand after magnetic separation is sent into high temperature sintering furnace, transferring the interior temperature of stove is 1880 ℃, fusing time is 12 hours, obtain the high purity quartz molten mass, stop after fusing finishes to the high temperature sintering furnace power supply, be cooled to the high-purity fused quartz of solid that normal temperature obtains bulk after cooling, first send into crusher in crushing after mechanical shock becomes fritter, obtain diameter less than the fused quartz sand of 4mm after screening, all particle diameters return to crusher fragmentation again greater than the fused quartz sand particle of 4mm, diameter is delivered to shredder less than the fused quartz sand of 4mm to be ground, charging and the discharging speed of controlling shredder are balanced, the quantity of feeding and discharging be the 1.5-1.8 ton/hour, the rotating speed of shredder is 25 rev/mins, milling time is 138 minutes, powder after shredder grinds is delivered to vibratory screening apparatus by induced draft fan wind and is sieved, powder is through after bolting, granularity is counted less than 400 purpose powders and is reentered through the feed back pipe and carry out regrind in shredder, the granularity number reserves for other use greater than 400 purpose silicon powders, granularity is that 400 purpose molten silicon micro mists enter collector, be that 400 purpose molten silicon micro mists are sent into magnetic separator again with the granularity in collector, the molten silicon micro mist that will contain magnetic, containing metal and metal oxide separates removal, the magnetic separation time is 0.1-0.2 hour, obtain granularity after magnetic separation and be 400 purpose photovoltaics with solar level obtuse angle molten silicon micro mist, the content of its silicon-dioxide obtains finished product more than 99.9% after packing.
Claims (3)
1. a photovoltaic industry is with the production method of solar level obtuse angle molten silicon micro mist, and the raw material that uses is the high-quality glass sand, it is characterized in that: step (1) is sent the high-quality glass sand into magnetic separator, utilizes magnetic field in magnetic separator will contain magnetic and metallic quartz sand separates removal, and quartz sand is 0.2-0.3 hour by the time of magnetic separator, step (2) is sent the high-quality glass sand after magnetic separation into high temperature sintering furnace, transferring the interior temperature of stove is 1820 ℃-1880 ℃, fusing time is 12-14 hour, obtain the high purity quartz molten mass, fusing stops powering to high temperature sintering furnace after finishing, be cooled to the high-purity fused quartz of solid that normal temperature obtains bulk after cooling, first after becoming fritter, mechanical shock sends into crusher in crushing, obtain diameter less than the fused quartz sand of 4mm after screening, all particle diameters return to crusher fragmentation again greater than the fused quartz sand particle of 4mm, step (3) is delivered to shredder with diameter less than the fused quartz sand of 4mm and is ground, charging and the discharging speed of controlling shredder are balanced, the quantity of feeding and discharging be the 1.5-1.8 ton/hour, the rotating speed of shredder is 23-25 rev/min, milling time is 138-142 minute, powder after shredder grinds is delivered to vibratory screening apparatus by induced draft fan wind and is sieved, powder is through after bolting, granularity is counted less than 400 purpose powders and is reentered through the feed back pipe and carry out regrind in shredder, the granularity number reserves for other use greater than 400 purpose silicon powders, granularity is that 400 purpose molten silicon micro mists enter collector, step (4) is that 400 purpose molten silicon micro mists are sent into magnetic separator again with the granularity in collector, the molten silicon micro mist that will contain magnetic, containing metal and metal oxide separates removal, the magnetic separation time is 0.1-0.2 hour, obtain granularity after magnetic separation and be 400 purpose photovoltaics with solar level obtuse angle molten silicon micro mist, the content of its silicon-dioxide obtains finished product more than 99.9% after packing.
2. a kind of photovoltaic industry according to claim 1 is with the production method of solar level obtuse angle molten silicon micro mist, and the feature of its step (2) is: when described melt temperature is 1820 ℃, corresponding fusing time is 14 hours; When melt temperature is 1850 ℃, corresponding fusing time is 13 hours; When melt temperature is 1880 ℃, corresponding fusing time is 12 hours.
3. a kind of photovoltaic industry according to claim 1 is with the production method of solar level obtuse angle molten silicon micro mist, and the feature of its step (3) is: when the rotating speed of described shredder was 23 rev/mins, corresponding milling time was 142 minutes; When the rotating speed of shredder was 24 rev/mins, corresponding milling time was 140 minutes; When the rotating speed of shredder was 25 rev/mins, corresponding milling time was 138 minutes.
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| CN 201210070479 CN103112855A (en) | 2012-03-18 | 2012-03-18 | Production method of solar-grade obtuse fused silicon micropowder for photovoltaic industry |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103627215A (en) * | 2013-11-27 | 2014-03-12 | 连云港东海硅微粉有限责任公司 | Preparation method of submicron silica powder |
| CN109110767A (en) * | 2018-09-05 | 2019-01-01 | 凯盛石英材料（黄山）有限公司 | A kind of method of the low sinople dry sand of volume production |
| CN111974527A (en) * | 2020-07-07 | 2020-11-24 | 江苏联瑞新材料股份有限公司 | Preparation method of high-purity fused silica micropowder for IC packaging |
-
2012
- 2012-03-18 CN CN 201210070479 patent/CN103112855A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103627215A (en) * | 2013-11-27 | 2014-03-12 | 连云港东海硅微粉有限责任公司 | Preparation method of submicron silica powder |
| CN103627215B (en) * | 2013-11-27 | 2016-05-11 | 江苏联瑞新材料股份有限公司 | A kind of preparation method of submicron order silicon powder |
| CN109110767A (en) * | 2018-09-05 | 2019-01-01 | 凯盛石英材料（黄山）有限公司 | A kind of method of the low sinople dry sand of volume production |
| CN111974527A (en) * | 2020-07-07 | 2020-11-24 | 江苏联瑞新材料股份有限公司 | Preparation method of high-purity fused silica micropowder for IC packaging |
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Application publication date: 20130522 |