441 Silicon Hlau: Nkag siab qhov sib txuas ntawm Smelting txheej txheem thiab pob loj faib

Hauv kev yuav khoom ntawm441 silicon hlau, kev yuav cov neeg ua haujlwm feem ntau tsom rau cov khoom siv tshuaj tshwj xeeb (Fe Tsawg dua lossis sib npaug ntawm 0.4%, Al Tsawg dua lossis sib npaug li 0.4%, Ca Less dua lossis sib npaug li 0.1%), tsis quav ntsej qhov tseem ceeb sib npaug: qhov loj me. Rau metallurgical engineers, qhov loj ntawm ib lub hnab ntawm silicon hlau tsis yog tsuas yog ib qho teeb meem ntawm kev yooj yim rau kev thauj mus los thiab noj, tab sis kuj yog ib qho kev xav ncaj qha ntawm kev ruaj ntseg ntawm cov txheej txheem smelting ntws. Tshaj - cov hmoov crushed txhais tau hais tias nce melting poob, thaum cov pob loj loj tuaj yeem ua rau melting qeeb hauv qhov cub induction.

Silicon hlau 441 belongs rau metallurgical qib silicon, thiab nws cov txheej txheem tseem ceeb yog txoj kev txo carbothermal. Tag nrho cov txheej txheem yog ua tiav nyob rau hauv ib tug loj submerged arc rauv. Qib Si441 yuav tsum muaj cov ntsiab lus calcium tsawg dua lossis sib npaug li 0.1%, qis dua li 0.3% ntawmSilicon hlau 553. Qhov no txhais tau hais tias lub tshuab hluav taws xob nruj dua kom huv los yog kev kho kom zoo ntxiv yog tsim nyog thaum lub sij hawm smelting. Ntau lub siab- zoo silicon441 tau txais hauv qab- tshuab tshuab ua kom zoo thaum lub sijhawm tsim khoom. Qhov no suav nrog kev sib xyaw ntawm cov pa oxygen thiab huab cua mus rau hauv cov silicon molten los ntawm cov cib permeable, siv npuas agitation kom ceev cov tshuaj tiv thaiv thiab tshem tawm impurities xws li txhuas thiab calcium. Cov txheej txheem no cuam tshuam ncaj qha rau cov siv lead ua morphology thiab qhov ntom ntom ntawm qhov tshwm sim silicon ingot.

Casting thiab Cooling

Tom qab cov kua silicon tawm hauv lub qhov cub, nws raug muab pov rau hauv silicon ingots. Tus nqi cua txias yog qhov tseem ceeb hauv kev txiav txim siab thawj qhov loj ntawm lub ingot:

Slow Cooling:

Feem ntau, tuag casting yog siv. Lub silicon ingot txias maj mam nyob rau hauv ib lub pwm, tsim ib coarse columnar siv lead ua qauv. Cov qauv no tsis tshua muaj kev ntxhov siab, tab sis thaum lub sij hawm tom ntej crushing, cov kab nrib pleb yooj yim propagate raws li ib thaj tsam ntawm cov nplej, ua cov khoom loj tsis tu ncua nrog cov hmoov tsawg.

Kev txias txias:

Qee qhov kev tsim tawm tas mus li los yog nyias cov ingot txias tuaj yeem ua rau muaj kev nplua -cov qauv zoo. Fine-silicone grained yog ib qho nyuaj thiab nkig ntau dua, ua rau nws yooj yim dua los tsim cov khoom tsis sib xws thiab cov hmoov zoo thaum lub sij hawm siv tshuab crushing.

Mechanical Crushing

Silicon ingots yuav tsum tau crushed thiab soj ntsuam kom ua tau raws li qhov xav tau los ntawm cov neeg siv khoom, xws li 10-50mm lossis 10-100mm.

Txheej txheem- cuam tshuam:

Cov qauv siv lead ua qub, txiav txim siab los ntawm cov txheej txheem smelting, ncaj qha txiav txim siab qhov yooj yim ntawm crushing thiab cov hmoov yield.

Yog hais tias qhov kub thiab txias yog tswj tsis sib npaug los yog refining dhau - tswj, micro- cracks los yog impurity segregation yuav muaj nyob rau hauv lub silicon ingot. Thaum lub sij hawm lub puab tsaig crushing, qhov no ua rau nws yooj yim dua rau tshaj - tsoo, ua ib tug loj tus naj npawb ntawm cov me me thiab hmoov me dua 10 hli.

High-zoo, zoo-crystallized 441 silicon ingots tsim ntau lub hom phiaj loj pieces (xws li, 20-80mm) thaum crushing, nrog ib tug concentrated particle loj faib.

Kev faib tawm loj

Ib tug ruaj khov 441 silicon hlau xa khoom yuav tsum muaj ib txwm thiab muaj zog particle loj faib. Yog tias qhov xwm txheej hnyav tshwm sim hauv ib pawg:

Too many oversized pieces (>100mm):

Qhov no yuav qhia tau tias lub sij hawm txias txias heev tom qab lub qhov cub tawm los yog kev tswj tsis tau zoo hauv cov txheej txheem crushing thiab tshuaj ntsuam.

Cov hmoov ntau dhau (<5mm): This may indicate:

Tsis zoo crystallinity thiab xoob kev ntxhib los mos ntawm silicon ingot nws tus kheej (cov khoom siv raw lossis cov teeb meem smelting).

Cov txheej txheem crushing hnyav dhau, tsim cov khoom pov tseg ntau dhau, nrog rau tus neeg muag khoom sib xyaw hauv cov hmoov kom nce qhov hnyav.

Hlawv -tawm thiab tawm los

Nyob rau hauv aluminium alloy melting (xws li, nyob rau hauv ib tug nruab nrab- zaus furnace), qhov tshwj xeeb nto ntawm silicon hlau txiav txim oxidation poob.

Hmoov zoo (<3mm):

Loj qhov chaw tshwj xeeb, yooj yim oxidized tam sim ntawd ntxiv rau molten aluminium, ua slag thiab txo cov khoom siv silicon. Kev lag luam kwv yees hais tias rau txhua txhua 5% nce hauv cov hmoov zoo, silicon hlawv -tawm tus nqi yuav nce 1-2%.

Lub hom phiaj Particle Loj (10-50mm):

Qhov zoo tshaj qhov sib npaug ntawm kev sib cais thiab qhov tsawg kawg nkaus oxidation poob. Cov khoom tuaj yeem sai sai rau hauv cov molten aluminium kom yaj, txo kev sib cuag nrog huab cua.

Melting Efficiency

Excessively large size (>100mm):

Hauv ib txwm nruab nrab-frequency furnaces, qhov no ua rau lub sijhawm melting, ua rau muaj zog siv zog, thiab tseem tuaj yeem ua rau muaj qhov thaiv ntawm qhov cub qhib, cuam tshuam rau kev noj zaub mov zoo.

Precision ntawm Composition Control

Rau precision alloy ntau lawm, qhov zoo tshaj plaws, tus nqi ntawm silicon ntxiv tuaj yeem raug xam kom raug rau txhua daim ntawm silicon ntxiv. Yog tias qhov loj me me tsis sib xws (xws li cov hmoov mus rau cov pob loj), cov nyiaj ntawm silicon ntxiv txhua zaus yuav hloov pauv tau zoo heev, cuam tshuam rau qhov sib xws ntawm cov hlau alloy.

Rau 441 silicon hlau, purity yog tus cim, thaum loj yog cov lus ntawm cov txheej txheem. Ib tus neeg muag khoom lub luag haujlwm tuaj yeem tsis tsuas yog muab cov ntaub ntawv qhia txog kev tsim nyog spectral tab sis kuj qhia lawv cov txheej txheem tswj kev muaj peev xwm thoob plaws tag nrho cov txheej txheem, los ntawm submerged arc rauv smelting mus crushing thiab tshuaj ntsuam, los ntawm ib tug ruaj khov thiab concentrated loj faib.