CN1994878A - Method for purifying silicon - Google Patents
Method for purifying silicon Download PDFInfo
- Publication number
- CN1994878A CN1994878A CN 200610166374 CN200610166374A CN1994878A CN 1994878 A CN1994878 A CN 1994878A CN 200610166374 CN200610166374 CN 200610166374 CN 200610166374 A CN200610166374 A CN 200610166374A CN 1994878 A CN1994878 A CN 1994878A
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- CN
- China
- Prior art keywords
- purity silicon
- silicon
- purity
- silicomethane
- coke
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
The invention discloses an extracting method of high-purity silicon, which is characterized by the following: adopting tungsten furnace sealed by argon gas in the ceramic kiln to fuse high-purity silica to do preliminary extraction; compounding with high-temperature hydrogen to obtain silane; extracting through critical liquefying pattern again; reducing to obtain high-purity silicon; reducing manufacturing cost of high-purity silicon greatly; fitting for solar energy generating and semiconductor industry.
Description
Technical field
The present invention relates to a kind of metallurgical technology, especially the process for extracting of HIGH-PURITY SILICON.
Background technology
Present HIGH-PURITY SILICON is to adopt Siemens Method substantially, by electric arc preliminary purification to 98%, by being made into the chemical gas trichlorosilane, re-using hydrogen and reduces then.It is huge that this mode consumes electric power, and output all has considerable restraint, and production cost is high.
Summary of the invention
Task of the present invention is to design the method for purification of silicon economic, that energy consumption is little.
The present invention adopts that heat-flash in electric furnace makes silicon carbide with high-purity silicon dioxide and coke in the tungsten stove of sealing, and then with high-temperature hydrogen chemical combination after obtain silicomethane, adopt critical liquefaction and alkali cleaning mode to purify once more once more, carry out Pintsch process then and obtain HIGH-PURITY SILICON.
Adopt fusion to purify and the gasification purification, can reduce energy consumption in a large number, reduce cost.
Embodiment
In concrete the making, at first quartz sand is opened wide burn off impurity, be sealed in 1750 degrees centigrade of fusions again and carry out preliminary purification, obtain liquid silicon-dioxide, again coke is added chemical combination and obtain silicon carbide at 1650 degrees centigrade.
With high-temperature hydrogen and red-hot silicon carbide reactor, the gas that obtains is hydrogen, water vapor, silane and hydrocarbon polymer then.Purify by critical liquefaction process again, in sodium hydroxide solution, clean again and obtain purer silicomethane, will hang down silane then and be higher than in temperature that cracking obtains HIGH-PURITY SILICON under 500 ℃ of situations.
Claims (3)
1. the process for extracting of a HIGH-PURITY SILICON, it is characterized in that adopting that heat-flash in electric furnace makes silicon carbide with high-purity silicon dioxide and coke in the tungsten stove of sealing, and then with high-temperature hydrogen chemical combination after obtain silicomethane, adopt critical liquefaction and alkali cleaning mode to purify once more once more, carry out Pintsch process then and obtain HIGH-PURITY SILICON.
2. according to claim 1, it is characterized in that quartz sand being opened wide burn off impurity, be sealed in 1750 degrees centigrade of fusions again and carry out preliminary purification, obtain liquid silicon-dioxide, again coke is added chemical combination and obtain silicon carbide at 1650 degrees centigrade.
3. according to claim 1, it is characterized in that purifying, in sodium hydroxide solution, clean again and obtain purer silicomethane by critical liquefaction process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610166374 CN1994878A (en) | 2006-12-25 | 2006-12-25 | Method for purifying silicon |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610166374 CN1994878A (en) | 2006-12-25 | 2006-12-25 | Method for purifying silicon |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1994878A true CN1994878A (en) | 2007-07-11 |
Family
ID=38250099
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200610166374 Pending CN1994878A (en) | 2006-12-25 | 2006-12-25 | Method for purifying silicon |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1994878A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105818287A (en) * | 2016-05-31 | 2016-08-03 | 上海纳晶科技有限公司 | Method for preparing high-purity submicron hydrated silica and silica microparticles in batch |
| CN107467064A (en) * | 2017-08-16 | 2017-12-15 | 广州韩能大健康产品有限公司 | A kind of new antibacterial goes the preparation and application of the conditioning liquid spray of peculiar smell |
-
2006
- 2006-12-25 CN CN 200610166374 patent/CN1994878A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105818287A (en) * | 2016-05-31 | 2016-08-03 | 上海纳晶科技有限公司 | Method for preparing high-purity submicron hydrated silica and silica microparticles in batch |
| CN107467064A (en) * | 2017-08-16 | 2017-12-15 | 广州韩能大健康产品有限公司 | A kind of new antibacterial goes the preparation and application of the conditioning liquid spray of peculiar smell |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20070711 |