Yuav ua li casSilicon hlauUa: Quartz, Carbon thiab Submerged Arc Rauv
Silicon hlauyog tsim los ntawm carbothermic txo ntawm quartz nyob rau hauv lub submerged arc rauv, siv carbon reductants ntawm huab cua kub. Cov txheej txheem hloov silica rau hauv metallurgical-qib silicon nrog tswj cov impurity theem, uas yog tom qab ntawd cam khwb cia, crushed, thiab graded rau industrial daim ntaub ntawv nyob rau hauv aluminium alloying, organic silicon chemistry, thiab photovoltaic manufacturing.
Txoj kev los ntawm raw quartz kom tiavsilicon hlauyog ib qho ntawm lub zog tshaj plaws - cov txheej txheem hnyav hauv cov hlau niaj hnub no. Tsis zoo li ntau cov hlau uas tau muab rho tawm los ntawm ores los ntawm aqueous lossis pyrometallurgical txoj kev, silicon ntau lawm cia siab rau cov khoom ncaj nraim - xeev txo cov tshuaj tiv thaiv uas xav tau kub tshaj 1800 degrees Celsius. Kab lus no taug kev los ntawm txhua theem ntawm cov txheej txheem tsim khoom, los ntawm kev xaiv cov khoom siv raw los ntawm kev tswj xyuas qhov kawg uas txiav txim siab seb puas yog ib pawg ntawmindustrial siliconua tau raws li cov lus qhia tshwj xeeb uas xav tau los ntawm aluminium smelters, tshuaj nroj tsuag, lossis cov tuam txhab hnub ci.
Carbothermic Reduction yog dab tsi?
Kev txo cov pa roj carbon monoxide yog cov txheej txheem pyrometallurgical uas cov hlau oxides raug txo rau hauv lawv daim ntawv siv cov pa roj carbon raws li tus neeg sawv cev txo. Hauv silicon hlau ntau lawm, tag nrho cov tshuaj tiv thaiv tuaj yeem raug suav hais tias yog SiO2 ntxiv rau 2C yields Si ntxiv 2CO. Cov pa roj carbon monoxide tsim tawm tawm ntawm lub qhov cub thiab feem ntau yog combusted los yog zoo. Cov tshuaj tiv thaiv no yuav tsum muaj qhov kub thiab txias siab tshaj qhov melting point ntawm silicon vim tias silicon -oxygen daim ntawv cog lus muaj zog heev.
1. Cov khoom siv raw thiab kev npaj
Qhov zoo ntawm tiavsilicon hlauyog hauv paus txiav txim siab los ntawm purity ntawm cov khoom pib. Yuav tsum muaj ob pawg ntawm cov khoom nkag: silicon -cov khoom noj khoom haus thiab cov roj carbonaceous txo tus neeg sawv cev. Txhua tus yuav tsum tau ua tib zoo muab, sim, thiab sib tov ua ntej nkag mus rau hauv qhov cub.
Quartz thiab Silica: Silicon Source
Thawj cov khoom noj khoom haus silicon yog siab -purity quartz lossis quartzite, crystalline daim ntawv ntawm silicon dioxide (SiO2). Tsis yog tag nrho cov quartz deposits yog haum raumetallurgical-qib siliconntau lawm. Lub quartz yuav tsum ua raws li cov txheej txheem tshuaj nruj, tshwj xeeb tshaj yog hais txog cov qib ntawm txhuas oxide (Al2O3), hlau oxide (Fe2O3), thiab calcium oxide (CaO), vim tias cov impurities qhia ncaj qha rau cov hlau kawg thiab nyuaj rau tshem tawm ib zaug qhia.
Cov lus qhia tshwj xeeb ntawm cov hlau quartz hu rau SiO2 cov ntsiab lus siab dua 98.5 feem pua, nrog Al2O3 qis dua 0.6 feem pua, Fe2O3 qis dua 0.2 feem pua, thiab CaO qis dua 0.15 feem pua. Qib qis dua -qib quartz tuaj yeem siv rau qib qis dua - purity silicon qib, tab sis cov neeg tsim khoom tsom mus rau qib 3303 lossis 2202 xav tau cov khoom siv huv huv. Lub quartz yog crushed thiab soj ntsuam mus rau ib qho loj npaum li cas, feem ntau 10 mus rau 80 millimeters, kom ntseeg tau tias lub txaj permeability thiab cov tshuaj tiv thaiv kinetics hauv lub cub tawg.
Carbon Reductants: Petroleum Coke, Charcoal, thiab Coal
Tus neeg sawv cev txo qis yog qhov tseem ceeb npaum li quartz. Peb hom tseem ceeb ntawm carbon yog siv hauv kev lag luamsilicon hlauntau lawm: roj av coke, charcoal, thiab low-ash metallurgical thee. Txhua tus muaj cov khoom sib txawv uas cuam tshuam rau kev ua haujlwm ntawm lub cub tawg thiab cov khoom zoo.
Petroleum coke yog cov khoom siv dav tshaj plaws vim nws cov ntsiab lus siab ruaj khov, cov hmoov tshauv tsawg, thiab tus nqi qis. Nws yog ib qho byproduct ntawm cov roj refining thiab muab cov pa roj carbon ntau yuav tsum tau rau qhov txo cov tshuaj tiv thaiv. Txawm li cas los xij, roj av coke muaj cov ntsiab lus ntawm cov sulfur siab, uas tuaj yeem qhia cov tshuaj sulfur impurities rau hauv silicon hlau yog tias tsis ua tib zoo tswj.
Charcoal, ua los ntawm cov ntoo, muaj qhov zoo ntawm cov hmoov tshauv tsawg heev thiab cov ntsiab lus tsis muaj leej faj. Nws feem ntau yog sib xyaw nrog roj av coke thaum ua tau siab dua - qib purity ntawm silicon hlau. Kev lag luam tawm -tawm yog qhov hluav taws xob kim dua thiab muaj qhov qis dua, uas tuaj yeem cuam tshuam rau cov khoom siv hluav taws xob. Hauv cov cheeb tsam uas muaj kev nkag tau mus rau hav zoov ruaj khov, charcoal tseem yog ib qho kev txo qis rau tus nqi zoo tshaj - qib silicon.
Tsawg- tshauv thee ua haujlwm ntxiv rau hauv qee qhov haujlwm. Nws yuav tsum muaj cov hmoov tshauv qis dua 8 feem pua thiab tsis muaj leej faj kom tsis txhob kis cov khoom. Coal feem ntau tsis nyiam tshaj li roj av coke lossis charcoal tab sis tuaj yeem muab cov nqi zoo hauv qee thaj chaw.
Cov khoom sib xyaw thiab them nyiaj
Ua ntej them nyiaj rau hauv qhov cub, cov quartz thiab carbon reductants raug ntsuas thiab sib xyaw ua ke raws li daim ntawv qhia suav. Qhov piv ntawm stoichiometric ntawm carbon rau silica yog theoretically ob moles ntawm carbon ib mole ntawm SiO2, tab sis nyob rau hauv kev xyaum ib tug ntau ntawm cov pa roj carbon monoxide yog siv los xyuas kom meej tag nrho cov txo thiab los them rau cov pa roj los ntawm combustion thiab sab tshua. Qhov sib tov yog feem ntau them los ntawm lub qhov cub sab saum toj uas siv lub tshuab them nyiaj tsis siv neeg uas faib cov khoom sib npaug ntawm lub cub tawg -section.
2. Lub Submerged Arc rauv: Lub plawv ntawm cov txheej txheem
Covsubmerged arc rauv(SAF) yog lub cuab yeej cuab tam ntawm silicon hlau kev lag luam. Lub tshuab hluav taws xob no muab nws lub npe los ntawm qhov tseeb tias cov lus qhia electrode yog submerged hauv qab ntawm qhov sib tov sib xyaw, tsim kom muaj hluav taws xob arc uas ua kom muaj cua sov hauv cheeb tsam cov tshuaj tiv thaiv thaum tiv thaiv arc los ntawm huab cua.
Rauv Tsim thiab Electrode Configuration
Muaj submerged arc furnaces rausilicon hlauntau lawm feem ntau yog li ntawm 10 mus rau 50 megawatts hauv kev ntsuas hluav taws xob hluav taws xob. Lub plhaub ntawm lub tshuab hluav taws xob yog lub voj voog lossis lub voj voos hlau uas txuas nrog cov cib refractory thiab carbon blocks uas tuaj yeem tiv taus qhov kub thiab txias thiab tshuaj lom neeg sab hauv. Peb graphite los yog tus kheej- ci electrodes yog teem nyob rau hauv ib daim duab peb sab qauv thiab nkag mus rau hauv lub ru tsev mus rau hauv tus nqi.
Cov electrodes txuas nrog peb -theem AC fais fab mov thiab tau txav mus los ntawm hydraulic lossis electromechanical positioning systems. Tus neeg teb xov tooj tswj cov electrode immersion qhov tob kom tswj tau qhov hluav taws xob ruaj khov thiab pom kev xa hluav taws xob zoo. immersion ntiav dhau ua rau nto arcing thiab silicon vaporization poob; Kev sib sib zog nqus tob dhau tuaj yeem ua rau cov hluav taws xob tsis ruaj khov thiab tsis muaj roj permeability.
Qhov Chaw Tiv Thaiv thiab Kub Profile
Nyob rau hauv lub qhov cub, cov cheeb tsam kub sib txawv tsim los ntawm sab saum toj mus rau hauv qab. Nyob rau hauv qhov chaw preheating sab sauv, cov khoom siv qis qis yog rhuab los ntawm cov roj kub kub nce mus rau qhov kub ntawm 500 txog 1000 degrees Celsius. Ntawm no, ib qho kev ya raws seem raug tshem tawm, thiab qee qhov kev cuam tshuam ua ntej yuav pib. Nyob rau hauv nruab nrab cheeb tsam, kub nce mus txog li 1500 mus rau 1800 degrees Celsius, qhov twg ib feem yuav txo tau thiab tsim ntawm silicon carbide (SiC) tshwm sim.
Cov tshuaj tiv thaiv tseem ceeb yog nyob rau hauv qab ntawm lub cub tawg, ncaj qha hauv qab cov lus qhia electrode, qhov twg kub ncav cuag 1800 txog 2100 degrees Celsius. Ntawm cov kub no, silicon carbide reacts nrog silica los ua silicon molten thiab carbon monoxide. Lub molten silicon accumulates nyob rau hauv lub cub tawg hauv qab thiab yog periodically tapped los ntawm ib tug taphole drilled nyob rau hauv lub refractory hauv ob sab phlu. Cov pa roj carbon monoxide nce los ntawm kab ntawv them nqi thiab tawm los ntawm cov chaw nres nkoj tso rau ntawm lub qhov cub sab saum toj.
Qhov kub gradient nyob rau hauv lub submerged arc rauv yog remarkably ntxhab. Qhov kev ncua deb ntawm tsuas yog ob peb metres cais qhov chaw txias ua ntej cua sov los ntawm thaj chaw tshuaj tiv thaiv qhov twg cov ntaub ntawv refractory mus txog lawv qhov txwv tsis pub muag. Qhov no yog vim li cas qhov cub hauv ob sab phlu tsim thiab kev saib xyuas yog qhov tseem ceeb rau kev ntseeg tau ntawm kev ua haujlwm.
Kev siv hluav taws xob thiab kev siv hluav taws xob
Kev siv hluav taws xob yog tib tus nqi tsav tsheb loj tshaj plaws hauvsilicon hlauntau lawm. Kev siv hluav taws xob tshwj xeeb yog li ntawm 11 txog 14 megawatt-teev ib metric tons ntawm silicon hlau tsim, nyob ntawm seb qhov ua tau zoo ntawm lub cub tawg, cov khoom siv raw zoo, thiab kev ua haujlwm. Cov electrodes siv carbon los ntawm oxidation ntawm lawv qhov chaw raug thiab los ntawm cov tshuaj tiv thaiv ntawm lawv cov lus qhia, yuav tsum tau ncua sij hawm ntxiv ntawm cov khoom siv electrode tshiab.
Cov neeg ua haujlwm hauv lub tshuab hluav taws xob saib xyuas cov ntsuas hluav taws xob suav nrog cov theem tam sim no, qhov hluav taws xob, lub zog hluav taws xob, thiab electrode txoj haujlwm hauv lub sijhawm. Cov kev tswj hwm qib siab siv cov kev ntsuas no los kho electrode positioning txiav, tswj kev ua haujlwm ruaj khov thaum ua kom muaj zog ua haujlwm zoo thiab silicon rov qab.
3. Tapping, Casting, thiab Solidification
Thaum muaj ntau npaum li cas ntawm molten silicon tau sau nyob rau hauv lub cub tawg hauv qab, lub taphole yog qhib siv ib tug oxygen lance los yog drilling khoom, thiab cov kua hlau ntws mus rau hauv lub ladle los yog ncaj qha mus rau lub casting nto. Cov txheej txheem tapping yuav tsum tau ua tib zoo tswj kom tsis txhob nqa cov slag ntau dhau rau hauv cov khoom.
Slag Separation thiab Refining
Ib qho me me ntawm cov ntaub ntawv slag thaum lub sijhawm txo cov txheej txheem, feem ntau yog cov silica uas tsis muaj kev cuam tshuam, calcium oxide, thiab txhuas oxide. Cov slag no tsawg dua li molten silicon thiab ntab rau saum npoo hlau, tso cai rau kev sib cais ntuj thaum tapping. Hauv qee qhov kev ua haujlwm, cov molten silicon raug xa mus rau lub ladle refining qhov twg ntxiv slag- cov neeg ua haujlwm tuaj yeem raug ntxiv los ntes cov khoom seem ua ntej qhov kawg casting.
Txoj Kev Casting
Ob txoj kev casting tseem ceeb yog siv hauv kev lag luam. Cov txheej txheem ib txwm nchuav molten silicon rau hauv hlau los yog cam khwb cia hlau pwm, ua ingots los yog blocks ntawm roughly uniform loj. Lwm txoj hauv kev cuam tshuam cov hlau mus rau hauv lub txaj txav los yog mus rau hauv lub qhov, ua cov slabs loj dua uas tom qab tawg. Txoj kev casting cuam tshuam rau cov qauv sab hauv ntawm cov hlau solidified thiab tuaj yeem cuam tshuam nws tus cwj pwm tawg thaum lub sij hawm tom ntej crushing.
Raws li cov silicon cools thiab solidifies, nws undergoes ib tug loj ntim contraction. Cov blocks solidified los yog slabs raug tso cai kom txias rau ambient kub, ib tug txheej txheem uas yuav siv sij hawm ob peb teev rau loj castings. Kev ua kom txias sai yog feem ntau zam vim tias thermal shock tuaj yeem tsim cov kab nrib pleb sab hauv uas ua rau cov txheej txheem qis qis.
4. Crushing thiab Size Classification
Thaum tag nrho txias, lub solidifiedsilicon hlauyuav tsum tau tawg mus rau hauv qhov loj me me uas xav tau los ntawm cov neeg siv khoom. Qhov no yog ua tiav siv lub puab tsaig crushers, lub khob hliav qab crushers, thiab cuam tshuam mills, ua raws li los ntawm kev tshuaj ntsuam ntawm vibrating decks.
Standard Size Fractions
Cov kev lag luam loj tshaj plaws specifications rauindustrial siliconyog 10 mus rau 50 millimeters, 10 mus rau 100 millimeters, thiab 50 mus rau 150 millimeters. Qee cov neeg siv khoom, tshwj xeeb tshaj yog nyob rau hauv kev lag luam tshuaj, xav tau cov feem zoo xws li 0 mus rau 10 millimeters lossis txawm hmoov qib qis dua 1 millimeter. Lub crushing thiab tshuaj ntsuam cov nroj tsuag feem ntau yog nruab nrog sib nqus sib cais kom tshem tawm cov kab mob hlau uas tau qhia thaum lub sijhawm crushing.
| Qhov Loj | Daim ntawv thov | Common Requested Tolerance |
|---|---|---|
| 10-50 hli | Aluminium alloying, ladle ntxiv | Max 5% sab nraud |
| 10-100 hli | General metallurgical siv | Max 5% sab nraud |
| 50-150 hli | Lub cub tawg loj them | Max 5% sab nraud |
| 0-10 hli | Chemical synthesis feedstock | Max 10% raug nplua |
| Hmoov (<1 mm) | Kev siv tshuaj lom neeg tshwj xeeb | Kev cai specification |
Plua plav tswj thiab nplua tuav
Crushing silicon hlau tsim kom muaj nuj nqis ntawm cov plua plav zoo, uas ua rau muaj kev phom sij rau kev noj qab haus huv thiab tawg. Cov nroj tsuag niaj hnub no siv cov txheej txheem sib tsoo nrog cov plua plav tshem tawm uas sau cov nqi nplua rau kev muag khoom raws li qis dua - tus nqi los ntawm cov khoom lossis rau kev rov ua dua tshiab. Cov neeg ua haujlwm hauv qhov chaw crushing yuav tsum tau siv kev tiv thaiv ua pa vim tias silicon plua plav tuaj yeem ua rau silicosis yog nqus tau ntev.
5. Lub Silicon Hlau Qib System
Kev lag luamsilicon hlauyog cais los ntawm plaub tus lej -tus lej uas qhia txog qib siab tshaj plaws ntawm peb qhov tseem ceeb impurities: hlau, txhuas, thiab calcium. Nkag siab txog qhov kev muab qhab nia no yog qhov tseem ceeb rau cov neeg yuav khoom thiab cov neeg muag khoom kom ntseeg tau tias cov khoom ua tau raws li qhov xav tau ntawm daim ntawv thov.
Nyeem Cov Cai Kawm Qib
Plaub tus lej - tus lej yog nyeem raws li hauv qab no: thawj tus lej sawv cev rau cov ntsiab lus hlau siab tshaj plaws hauv kaum ntawm ib feem pua, tus lej thib ob sawv cev rau qhov siab tshaj plaws txhuas cov ntsiab lus nyob rau hauv kaum ntawm ib feem pua, thiab tus lej thib peb thiab plaub ua ke sawv cev rau cov ntsiab lus calcium ntau tshaj hauv pua pua ntawm ib feem pua. Tag nrho cov txiaj ntsig yog qhov siab tshaj plaws, thiab kev soj ntsuam tiag tiag tuaj yeem pom cov qib impurity qis dua.
| Qib | Max Fe (%) | Max Al (%) | Max Ca (%) | Min Si (%) | Kev siv thawj zaug |
|---|---|---|---|---|---|
| 553 | 0.50 | 0.50 | 0.30 | 98.5 | Aluminium alloying |
| 441 | 0.40 | 0.40 | 0.10 | 99.0 | Aluminium, tshuaj lom neeg |
| 3303 | 0.30 | 0.30 | 0.03 | 99.3 | Organic silicon, siab -qib alloys |
| 2202 | 0.20 | 0.20 | 0.02 | 99.5 | Hnub ci- qib silicon precursor |
| 1101 | 0.10 | 0.10 | 0.01 | 99.7 | Semiconductor ua ntej |
Qib 553 yog qib siab tshaj plaws tsim thiab siv tau, feem ntau ua haujlwm rau kev lag luam txhuas uas silicon ntxiv rau txhuas los txhim kho castability thiab lub zog. Qib 441 muab cov impurities qis dua rau cov ntawv thov uas xav tau kev ua haujlwm zoo dua. Qib 3303 thiab 2202 suav tias yog siab dua -purityindustrial siliconthiab hais kom tus nqi hwm vim tias lawv xav tau cov khoom siv raw zoo dua thiab kev tswj lub tshuab ua kom zoo dua.
Cov Ntsiab Lus thiab Cov Lus Qhia Ntxiv
Tshaj li cov hlau- txhuas-calcium system, qee cov ntawv thov txwv kev txwv rau lwm yam kab. Titanium, phosphorus, thiab boron yog tshwj xeeb tshaj yog tseem ceeb rau silicon destined rau hnub ci cell ntau lawm vim hais tias cov khoom no degrade cov hluav taws xob zog ntawm lub kawg polysilicon. Cov neeg yuav khoom hauv cov khoom siv hluav taws xob photovoltaic feem ntau qhia txog qhov siab tshaj plaws titanium qis dua 200 qhov hauv ib lab, phosphorus qis dua 50 feem ntawm ib lab, thiab boron qis dua 10 feem ntawm ib lab, txawm tias qhov kev txwv tseeb txawv ntawm cov neeg siv khoom.
6. Kev Tswj Xyuas Zoo thiab Kev Ntsuas Cov Txheej Txheem
Quality assurance yog woven thoob plaws hauv lubsilicon hlautxheej txheem ntau lawm, los ntawm cov khoom raw khoom soj ntsuam los ntawm cov khoom pov thawj zaum kawg. Ib qho kev tswj xyuas zoo tshaj plaws tiv thaiv ob tus neeg tsim khoom thiab cov neeg siv khoom los ntawm kev ua kom ntseeg tau tias txhua qhov khoom xa tuaj ua tau raws li nws cov kev cai tshuaj thiab lub cev.
Hauv -Kev Saib Xyuas Txheej Txheem
Thaum lub sijhawm ua haujlwm ntawm lub tshuab hluav taws xob, cov qauv ntawm cov hlau tau raug coj mus rau ib ntus thiab tshuaj xyuas cov ntsiab lus silicon thiab cov impurities tseem ceeb siv X-ray fluorescence (XRF) lossis optical emission spectrometry (OES). Cov kev ntsuas ceev ceev no muab cov lus tawm tswv yim tsis pub dhau feeb, tso cai rau cov neeg ua haujlwm hauv lub tshuab hluav taws xob los kho cov khoom siv raw khoom lossis cov khoom siv hluav taws xob yog tias cov khoom tawm sab nraum lub hom phiaj qhov rai.
Kev ntsuas kub ntawm lub tshuab hluav taws xob lub plhaub, cov pa hluav taws xob, thiab cov tshuab cua txias muab kev ceeb toom ntxov ntawm cov xwm txheej txawv txav uas tuaj yeem cuam tshuam cov khoom zoo lossis kev nyab xeeb ntawm kev ua haujlwm. Gas muaj pes tsawg leeg tsom xam ntawm lub cub tawg tawm- roj pab cov neeg ua haujlwm soj ntsuam qhov ua tiav ntawm qhov txo cov tshuaj tiv thaiv thiab kuaj pom cov cua nkag mus uas tuaj yeem ua rau silicon oxidation.
Kev Xeem Khoom Kawg
Tom qab crushing thiab sizing, tus neeg sawv cev cov qauv raug sau los ntawm txhua qhov ntau lawm batch raws li tus qauv qauv raws tu qauv. Cov qauv no tau soj ntsuam tag nrho cov tshuaj lom neeg rau txhua lub ntsiab lus. Particle loj faib yog txheeb xyuas los ntawm sieve tsom xam kom paub meej tias ua raws li qhov txiav txim me me feem. Kev tshuaj xyuas qhov muag pom kev txawv teb chaws, cov txheej txheem oxide ntau dhau, lossis qhov txawv txav ntawm qhov chaw.
Rau kev xa khoom xa tawm, cov chaw soj ntsuam thib peb sab nraud xws li SGS, Bureau Veritas, lossis Intertek nquag koom ua ntej - kev tshuaj xyuas thiab tshuaj xyuas khoom xa tuaj. Cov ntawv pov thawj kev soj ntsuam tau muab qhov kev lees paub tsis ncaj ncees ntawm qhov zoo uas ntseeg tau los ntawm cov neeg yuav khoom thoob ntiaj teb. ZhenAn International Co., Limited txhawb nqa SGS, GB, thiab ASTM cov qauv ntsuas kom tau raws li cov neeg siv khoom sib txawv.
Packaging Integrity thiab Moisture Control
Txawm tias tom qab dhau kev sim tshuaj thiab lub cev,silicon hlautuaj yeem cuam tshuam los ntawm kev nqus dej noo thaum khaws cia thiab thauj. Kev tswj xyuas kom zoo yog li txuas ntxiv mus rau kev pov thawj ntim khoom, kom ntseeg tau tias lub hnab lossis cov thawv ntim khoom tsis zoo thiab raug kaw zoo. Cov ntsiab lus noo noo ntawm cov khoom tiav yog feem ntau kuaj ua ntej xa khoom xa tuaj, nrog rau qib siab tshaj plaws ntawm 0.5 mus rau 1.0 feem pua nyob ntawm cov neeg siv khoom tshwj xeeb.
Ntsiab Cai
- Silicon hlauyog tsim los ntawm carbothermic txo ntawm quartz siv carbon reductants nyob rau hauv lub submerged arc rauv ntawm 1800-2100 C.
- Raw khoom zoo, tshwj xeeb tshaj yog quartz purity thiab carbon tshauv cov ntsiab lus, ncaj qha txiav txim siab ua tiav qib ntawm cov khoom kawg.
- Cov lej lej (553, 441, 3303, 2202) encodes siab tshaj plaws Fe, Al, thiab Ca impurity theem nyob rau hauv seem ib txhiab.
- Kev siv hluav taws xob yog qhov tseem ceeb ntawm cov nqi tsim khoom, ua rau tus nqi hluav taws xob yog qhov tseem ceeb ntawm cov nroj tsuag qhov chaw thiab kev sib tw.
- Kev tswj hwm zoo, suav nrog - daim ntawv pov thawj thib peb, yog qhov tseem ceeb rau kev ua kom tau raws li cov kev xav tau nruj ntawm cov neeg siv khoom txhuas, tshuaj, thiab photovoltaic.
Cov lus nug nquag
Dab tsi raw cov ntaub ntawv siv los ua silicon hlau?Thawj raw cov ntaub ntawv rausilicon hlauntau lawm yog siab-purity quartz los yog silica (SiO2) raws li cov khoom siv silicon, thiab carbonaceous txo cov neeg ua haujlwm suav nrog roj av coke, charcoal, thiab qis- tshauv thee. Lub quartz yuav tsum muaj cov qib qis ntawm txhuas, hlau, thiab calcium oxides kom ntseeg tau tias cov khoom zoo kawg nkaus.
Dab tsi yog qhov submerged arc rauv thiab nws ua haujlwm li cas?
Lub submerged arc rauv (SAF) yog lub cub hluav taws xob uas cov lus qhia electrode tau faus rau hauv qab cov nqi sib xyaw ntawm quartz thiab carbon. Cov hluav taws xob arc tsim cov cua kub kub hauv qab ntawm qhov chaw, ncav cuag qhov kub txaus rau kev txo qis carbothermic thaum txo qis silicon vaporization poob.
Cov lej ntawm silicon hlau (553, 441, 3303, 2202) txhais li cas?
Plaub - tus lej lej qhia qhov siab tshaj plaws impurity nyob rau hauv ib txhiab: thawj tus lej yog cov ntsiab lus hlau siab tshaj plaws, qhov thib ob yog txhuas, thiab ob lub xeem sawv cev rau calcium. Piv txwv li, 553 txhais tau tias max 0.50% Fe, max 0.50% Al, thiab max 0.30% Ca. Cov lej qis qhia tias muaj kev purity siab dua.
Vim li cas cov pa roj carbon siv los ua tus neeg sawv cev txo qis hauv silicon hlau tsim?
Cov pa roj carbon monoxide yog siv vim nws muaj kev sib raug zoo rau cov pa oxygen ntawm qhov kub thiab txias. Ntawm qhov cub kub kub, carbon txo cov silica (SiO2) rau cov khoom siv silicon thaum tsim cov pa roj carbon monoxide. Cov pa roj carbon kuj raug nqi - siv tau, yooj yim muaj, thiab tsim cov roj los ntawm cov khoom lag luam.
Dab tsi yog qhov kub thiab txias yuav tsum tau ua kom txo qis carbothermic ntawm silica?
Carbothermic txo ntawm silica rausilicon hlauFeem ntau tshwm sim ntawm qhov kub ntawm 1800 C thiab 2100 C hauv lub qhov cub submerged arc. Cov huab cua kub no yog qhov tsim nyog los kov yeej cov thermodynamic stability ntawm silicon-oxygen daim ntawv cog lus thiab tsav cov kev txo qis rau pem hauv ntej.
Yuav ua li cas yog silicon hlau cam khwb cia thiab tawg mus ua lag luam loj?
Molten silicon hlau yog tapped los ntawm lub cub tawg thiab nchuav mus rau hauv casting pwm los yog mus rau lub txaj casting, qhov twg nws solidifies rau hauv loj blocks los yog slabs. Tom qab txias, cov khoom hlau yog crushed thiab tshuaj xyuas rau hauv tus qauv loj feem xws li 10-50 hli, 10-100 hli, los yog kev cai ntau yam rau cov neeg siv khoom.
Cov kev ntsuam xyuas zoo li cas ntawm cov hlau silicon?
Kev tswj xyuas zoo suav nrog kev tshuaj xyuas tshuaj rau silicon purity thiab kab kawm (Fe, Al, Ca, Ti, P, B), particle loj pov thawj, kev tshuaj xyuas qhov muag rau cov neeg txawv teb chaws, thiab cov tshuaj xyuas cov dej noo. Thib peb -ib tog ntawv pov thawj los ntawm SGS los yog cov chaw soj ntsuam sib npaug feem ntau yog muab rau cov khoom xa tawm.
Tiv tauj peb rau Silicon Metal Supply
ZhenAn International Co., Limited muaj tshaj 30 xyoo ntawm kev paub nyob rau hauv ferroalloy thiab metallurgical raw khoom ntau lawm. Nrog rau 30,000 square meter Hoobkas, txhua xyoo muaj peev xwm ntawm 150,000 metric tons, thiab SGS- tau ntawv pov thawj zoo, peb xa cov qib zoo silicon hlau rau txhuas smelters, tshuaj manufacturers, thiab photovoltaic producers thoob ntiaj teb.
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