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1、治金法制备太阳能级多晶硅技术发展动态（Metallurgical preparation technology development of solar grade polysilicon）Pdf documents may experience poor browsing on the WAP side. It is recommended that you first select TXT, or download the source file to the local view.melonApplied TechnologyDevelopment trend of preparatio
2、n of solar grade polycrystalline silicon by metallurgical methodWen Hui MaState Metallurgical Engineering Laboratory of vacuum metallurgy, Kunming University of Science and Technology, Yunnan, Kunming,Solar power generation has sufficient cleanliness, absolute safety, relative universality and abund
3、ance of resources, longevity and maintenance free,The energy industry does not have the advantage, the world photovoltaic industry to maintain rapid growth in annual growth rate,.AboveTotal annual output exceeded.,Become the worlds new energy development,It has great potential for development and ha
4、s great potential for development. The implementation of the renewable energy law in China has promoted the solar cells in ChinaDevelopmentscountry.,Solar cell output in China reached,Excluding TaiwanwithBecome the worlds largest producer,In addition, the state has also proposedSolar power will reac
5、h,The target is our solar power.The rapid and healthy development of the pool industry provides a huge market spaceSilicon material is still the most important conversion material for solar cells, especially crystalline silicon solar cellsIf consideredMonocrystalline silicon, polycrystalline silicon
6、 and silicon cell,In 2013, the proportion of crystalline silicon cells is aboutten thousand,.China Academy of engineering consultingten thousandProject team experts, according to extensive research, is expected toIn 2012, the worlds solar power generation accounted for about the worlds total energy
7、reachedten thousand,Requires solar grade polysiliconRequires solar grade polysilicon.,Year reached,Solar grade polysilicon is needed,At present international polysilicon production technology mainly has improved SIEMENS method and silane methodModified SIEMENS method,About the worlds total outputIt
8、has been monopolized by several big companies in the United States, Japan and Germany,Technical blockade.Although the relevant enterprises in China have achieved remarkable results in energy conservation and emission reduction, the core technology of production has also been,The yield rate of the re
9、duction reaction is not complete,One,Power consumption per kilogram of polysilicon,.thisIt has high production cost, large investment and long construction period. It is a typical technology, capital and talent intensive type of studentProduction technology.The energy consumption of silane method is
10、 low, but there is potential danger of explosion,.Polysilicon production in China reached,And the market demand is about,Polysilicon material gap up to,There has been an investment in polysilicon in the country.,Upsurge according to incomplete statistics, China is now near,The company invested in th
11、e construction of production lines, due to the lack of technical personnelThe cost of the lack of competitiveness of product inspection means due to a lack of competitiveness of Chinas polysilicon enterprises lack sharawadgiAffected by the world financial crisis.,Although expectedScientific signific
12、ance and broad application prospects.The output of solar cells in China will exceed that in 2008, but the retail price of silicon has fallen from ramp up to,Great attention has been paid to direct metallurgical preparation at home and abroadThe research of new technology of solar grade polysilicon h
13、as been actively applied to industrializationMajor research institutes for silicon materials are Kunming University of Science and Technology,Therefore, the development of our country has independent knowledge production.Right polysilicon production technology cost force,Further reduce productionImp
14、roving the international competition of polysilicon enterprises in ChinaThe independent innovation of polysilicon technology in ChinaDalian University of technology, Xiamen University, Hebei University of Technology and so onThe main enterprises of Fujian Nanan three,A new method for preparing polyc
15、rystalline silicon by metallurgy is one,Henan Tianyu,OpportunityShanghai, new energy, Liaoning, Jinzhou, new century glass, yesThe healthy development of solar cell industry is of great importanceLimited company and so on, and obtained the gratifying research result,Applied Technologyyear,monthThat
16、dayNo.Volume sevenNo.stageEmphasis has been placed on chemistry and metallurgy in recent yearsRoute preparation of solar grade polysilicon technology was evaluatedThe,Acid leaching is also used, followed by hydrogen in reactive gases,About its service lifeproduct,The production of optical fibers in
17、2000.,Steam,Medium melting,To get rid of some of them,A large number of defective products still exist in the processFrom another angleMetallurgical methods are considered to be of great use in energy consumption,Finally, vacuum and directional solidification have been adoptedAchieve the effect of r
18、emoving impurities.Current fiber optic and production processesGreat potential for traditional SIEMENS lines onlyXi.Company process gold,Defective products will become a dangerous wasteLead to high purity silica resources and potential,A set of methods similar to metal smelting and purificationSilic
19、on is broken and subjected to acid leachingThen directional coagulation is used,The process of purifying and preparing polycrystalline silicon is called metallurgymethod,Impurities in silicon were treated by solid methodPlan toHigh energy wastebad.At the same time caused a break in the environmentPr
20、oducts produced according to foreign targets,In mid year,Preparation of solar energy by reduction of high-purity chemical reagentsResearch group and University of Tokyo in Japan for international cooperationThe joint development process has a great potential value.The content of carbon and oxygen im
21、purities should be in the impurity contentAmount should be inA method,The following metal impurities of boron and phosphorus contain,do,Following.Metallurgy is not merely a law,Polysilicon gradeThe value of waste fiber and fiber optic, solar grade, etc., is reportedCorporateImpregnated carbon,New po
22、lysilicon technology, fiber defect as raw material, better effect,The technology is based on the use of waste fiber and light plasma thermal reduction,It is a combination or set of methods,Such as blowing refining technology of wet slag refining technologyKeywords technology of metallurgy; direction
23、al solidification; refining technology; plasma;Carbothermal reduction process,The high-purity quartz sand will be used later,The carbon black of the block is reducedCarbon black heat.,Separation technique was used to prepare high-purity solar siliconI got it.Bulk oxidation refining technology; vacuu
24、m evaporation refining technology; electricityChemical smelting technology,Its purity is comparable to that of silica because of the arcAbout in the furnaceIn order to solve the solar energy level polycrystallinePlasma chemical reaction purification technique.The carbon is derived from the electrode
25、,Silicon shortage problem to find a good idea to askOperation etc.The main feature of the method is the extraction of elemental siliconThe content of the effective impurities is higher, neverthelessThe content of impurities has been greatly reducedSome progress has been made in theory.,Preparation o
26、f solar grade polycrystalline silicon by melting electrolysis method, Professor Ito of Kyoto University in JapanIn the Journal of natural materials, a new process for preparing silicon by using molten salt electrolysis process has been publishedOne,.Keep the original state in the pure processtheyBut
27、 the eyeSolar grade is purified by metallurgical grade silicon directlyThe main problem that existed before was that the purity of carbon was not attained,The study isC,PolysiliconJapaneseIt is difficult to ensure the source of carbon black, mainly from natural sourcesThe company is in JapanFor ye,O
28、neMolten salt systemDecomposition in gas to obtain its relatively high cost, as of nowIt hasnt been well used yet.,Can be achieved in ChinaSum research,Their electrolytic temperatures areThe following processes are proposed under the grantGold grade silicon as raw material, purenetwork.,andA small a
29、mount of silicon is obtained and laterCarry it out in two stepsIn Germany,.The company will quartz,The research team developed a deep system for the new process,The first stage uses vacuum in the electron beam furnace.Sand is subjected to an aluminum reduction using this new semi continuousThe proce
30、ss can be obtained with a higher purity than the usual metallurgical grade siliconAt present, the experimental scale has reached kilograms of waterOnePhosphorus removal by evaporation and directional solidification and preliminary removal of metal impurities in the second stage in a plasma smelting
31、furnace.,flatcut.Koreas play and so on have been studiedsilicon.It has lower boron carbon content and then its,Preparation of high-purity silicon from silica fume in molten salt systemTechnology,Boron and carbon are removed by oxidizing atmosphereMolten silicon,Crushing, acid washing and liquid air
32、extraction of this material,Compared with the Japanese development technology, because the mechanism is not.Cooling by directional solidification.In the process of solidificationAvailable for solar cellsIt has the potential to expand experimental research.domesticRemove metal impurities during the t
33、wo step directional solidification processcome outPolar.in addition,Halogenation of silicon by high purity metal reductionMany present.Recently, relevant research workers have also been carried out in this fieldThe metal impurity is solidified directly on the solid-liquid interfaceThings are also an
34、 ideal way for scholars to pay more attention to this aspectFor example, Wuhan University,.The output of the solar grade polysilicon shows its resistance coefficient maintained in the,Did they adopt?Preparation of solar grade polycrystalline silicon by low temperature solidification of Al Si meltPro
35、fessor Morita Kazuki of University of Tokyo proposed,One.The same high-purity reducing agent is used to reduce the halide of silicon so as to obtain solar grade polysilicon with relatively high purity solar grade polycrystalline silicon vacuum metallurgy methodKunming University of Science and Techn
36、ology, according to metallurgical grade silicon impuritiesProfessor Morita Kazuki of University of Tokyo in Japan aims at the projectArt shortageThermodynamic studies have found condensation in industrial siliconEleven oneThe addition of calcium is beneficial to the formation of soluble iron and sil
37、icon in the metal siliconandEleven oneOn the basis of,One,Alloys can form under certain conditions,Low temperature melts, which reduce the silicon refining temperature, utilize siliconAnd aluminum scrap were prepared by low temperature melt solidification methodalloyimpurity,A large amount of iron a
38、nd iron can be removed by acid leachingThe process also removes impurities such as boron and phosphorus,The vacuum metallurgy, vacuum refining, vacuum distillation and vacuum degassing are adopted,Study on material properties of energy level polysilicon,Stage has now been achieved,Promoting effectAn
39、d put forward a theoretical feasibilityVacuum directional solidification and other new technologies were prepared directly.And put forward to use this method to make and discoverNew craft sighin addition,Solar grade polysilicon,At present, the purity of silicon products reached,The process of prepar
40、ing solar grade polysilicondifference,.Norway and Germany jointly developed and studied,The integrated correlation vacuum concentrate was developed,Different heating methods have great effect on silicon refininginvestigatereason,The process is to make metallurgical grade silicon alloy backwardThen p
41、roceed to acid leaching and refining,Refining large vacuum metallurgy equipment is currently being openedIndustrial experimental studyNational invention patent has been granted,Line solidification treatment,Because silicon is on different crystal planes, its thermal expansion systemThe experimental
42、samples were assembled into solar cells with the highestThe resistance and.,At the same time, cooperation with Japans University of Tokyo Research Laboratory of international cooperation,Silicon material has been established,Several different networks are concerned with the purity of silicon materia
43、ls,In the meltEfficiency forDeep human system should be developed.The condensation process of bulk silicon is related to silicon crystallong,Battery efficiency relationship PavilionBasic research has achieved good results and promoted the overall development of the technology. Solar grade polycrystalline silicon has been prepared from waste silica fibersQuartz fiber mainly consists of high-purity silica groupThe law of precipitation of metallic impurities is also one of the studies,The compa