xov xwm

Bubbling, cov txheej txheem tseem ceeb thiab siv dav hauv kev yuam kom homogenization, cuam tshuam rau cov txheej txheem fining thiab homogenization ntawm molten iav. Ntawm no yog ib qho kev soj ntsuam ntxaws.

1. Txoj Cai ntawm Bubbling Technology

Bubbling muaj kev txhim kho ntau kab ntawm bubblers (nozzles) nyob rau hauv qab ntawm lub melting rauv (feem ntau nyob rau hauv lub kawg ntawm lub melting cheeb tsam los yog fining cheeb tsam). Ib qho roj tshwj xeeb, feem ntau yog compressed cua, nitrogen, los yog cov roj inert, yog txhaj rau hauv cov iav kub kub hauv ib ntus lossis txuas ntxiv. Cov roj nthuav tawm thiab nce los ntawm cov iav molten, tsim cov kab ntawm cov npuas nce.

2. Kev cuam tshuam ntawm Bubbling ntawm Txoj Kev Fining (Piv txwv zoo)

Bubbling tsuas yog pab tshem tawm cov pa npuas, yog li qhia meej rau lub khob.

Txhawb nqa npuas tshem tawm

Suction nyhuv: Ib cheeb tsam uas tsis tshua muaj siab tsim nyob rau hauv lub wake ntawm qhov loj, nce npuas, tsim kom muaj "tswj nyhuv." Qhov no zoo nqus, sib sau ua ke, thiab sib koom ua ke me me npuas npuas los ntawm ib puag ncig molten iav, nqa lawv mus rau saum npoo kom tshem tawm.

Txo roj Solubility: Cov roj txhaj tshuaj, tshwj xeeb tshaj yog cov roj inert, tuaj yeem dilute cov roj yaj hauv cov iav molten (piv txwv li, SO₂, O₂, CO₂), txo lawv qhov siab ib nrab. Qhov no ua rau lub exsolution ntawm yaj gases mus rau hauv lub nce npuas.

Txo cov Supersaturation hauv zos: Cov npuas nce ntxiv muab cov roj ua kua sib txuas ua ke, ua kom yooj yim rau cov roj ntsha supersaturated yaj kom exsolve thiab diffuse rau hauv cov npuas.

Shortened Fining Txoj Kev: Cov kab npuas nce zuj zus ua raws li "kev khiav ceev," ua kom nrawm ntawm kev tsiv teb tsaws ntawm cov pa yaj thiab cov npuas micro mus rau saum npoo.

Ua npuas ncauj txheej cuam tshuam: Nyob ze ntawm qhov chaw, cov npuas loj tuaj yeem pab tawg cov txheej ntom ntom npuas ntom ua npuas dej uas tuaj yeem cuam tshuam cov roj kev ntiab tawm.

Tej yam tshwm sim tsis zoo (yuav tsum tau tswj)

Kev Taw Qhia Ntawm Cov Npuas Tshiab: Yog hais tias bubbling tsis (gas siab, zaus, thiab purity) raug tswj tsis raug lossis yog cov nozzles raug thaiv, cov txheej txheem tuaj yeem ua kom pom qhov tsis xav tau tshiab, npuas me me. Yog tias cov npuas no tsis tuaj yeem raug tshem tawm lossis yaj hauv kev nplua tom qab, lawv dhau los ua qhov tsis xws luag.

Kev xaiv roj tsis raug: Yog tias cov roj txhaj tshuaj tsis zoo nrog cov iav molten los yog cov roj yaj, nws tuaj yeem tsim cov roj los yog cov khoom sib txuas nyuaj dua, cuam tshuam cov txheej txheem fining.

3. Kev cuam tshuam ntawm Bubbling rau ntawm Homogenization txheej txheem (Qhov zoo tshaj plaws)

Bubbling ho txhim khu kev sib tov thiab homogenization ntawm coviav molten.

Enhanced Convection thiab Agitation

Vertical Circulation: Raws li cov kab npuas nce, lawv qhov ntom ntom piv rau cov iav molten tsim muaj zog nce siab. Txhawm rau ntxiv cov iav nce, cov iav ib puag ncig thiab hauv qab ntws rov qab mus rau hauv kab npuas, tsim kom muaj zog.ntsug nciglos yogconvection. Qhov no yuam convection zoo heev accelerates kab rov tav sib tov ntawm molten iav.

Shear Mixing: Qhov sib txawv ntawm qhov sib txawv ntawm cov npuas nce thiab cov iav ib puag ncig molten generates shear rog, txhawb diffusive sib xyaw ntawm cov iav uas nyob ib sab.

Hloov tshiab interface: Lub agitation los ntawm cov npuas nce tsis tu ncua refreshes kev sib cuag interfaces ntawm iav sib txawv compositions, kev txhim kho cov efficiency ntawm molecular diffusion.

Kev cuam tshuam ntawm Stratification thiab Striations

Muaj zog convection zoo tawgtshuaj los yog thermal stratificationthiabkev tawm tsamtshwm sim los ntawm qhov sib txawv ntawm qhov sib txawv, qhov kub thiab txias gradients, los yog kev pub mis tsis sib xws. Nws suav nrog cov txheej txheem no rau hauv lub ntsiab ntws rau kev sib tov.

Qhov no yog tshwj xeeb tshaj yog pab rau kev tshem tawm“Zoo tuag”nyob rau hauv qab ntawm lub tank, txo crystallization los yog loj inhomogeneity tshwm sim los ntawm lub sij hawm stagnation.

Txhim kho Homogenization Efficiency

Piv nrog rau tej yam ntuj tso convection los yog kub-gradient ntws, qhov yuam kev convection generated los ntawm bubbling muaj ib tugntau zog ceev thiab dav ncav cuag. Qhov no ua rau lub sijhawm luv luv kom ua tiav qib siab ntawm homogeneity lossis ua tiav siab dua qhov sib xws hauv tib lub sijhawm.

Tej yam tshwm sim tsis zoo (yuav tsum tau saib xyuas)

Refractory Khoom Erosion: Lub siab ceev nrooj ntawm cov npuas nce thiab qhov hnyav convection lawv induce tuaj yeem ua rau muaj zog yaig thiab corrosion ntawm lub tank hauv qab thiab sab phab ntsa refractory cov ntaub ntawv, shortening lub cub tawg lub neej. Qhov no tseem tuaj yeem qhia cov khoom yaig rau hauv cov iav molten, tsim cov khoom tshiab ntawm inhomogeneity (pob zeb, striations).

Kev cuam tshuam ntawm Flow Patterns: Yog hais tias qhov bubbling point layout, npuas loj, los yog zaus tsim tsis zoo, lawv tuaj yeem cuam tshuam rau qhov qub, qhov kub thiab txias thiab ntuj ntws teb nyob rau hauv lub melting tank. Qhov no tuaj yeem tsim cov cheeb tsam tshiab tsis sib xws lossis vortices.

4. Cov Txheej Txheem Tseem Ceeb rau Bubbling Technology

Qhov chaw ua npuas ncauj: Feem ntau nyob rau tom kawg ntawm thaj chaw melting (kom ntseeg tau tias cov ntaub ntawv nyoos feem ntau yog melted) thiab fining zone. Txoj haujlwm yuav tsum raug xaiv los ua kom zoo tshaj qhov ntws thiab qhov kub thiab txias.

Kev xaiv roj: Cov kev xaiv muaj xws li huab cua (tus nqi qis, tab sis muaj zog oxidizing zog), nitrogen (inert), thiab inert gases xws li argon (zoo tshaj inertness, tab sis kim). Qhov kev xaiv nyob ntawm lub iav muaj pes tsawg leeg, redox xeev, thiab tus nqi.

Bubble Size: Qhov zoo tshaj plaws yog tsim cov npuas loj (ob peb millimeters mus rau centimeters nyob rau hauv txoj kab uas hla). Cov npuas me me nce maj mam, muaj qhov tsis muaj zog nqus, thiab tsis tuaj yeem raug tshem tawm yooj yim, ua qhov tsis xws luag. npuas loj yog tswj los ntawm nozzle tsim thiab roj siab.

Bubbling zaus: Kev ua npuas ncauj ib ntus (xws li, ib zaug txhua ob peb feeb) feem ntau siv tau zoo dua li kev ua npuas ncauj tas li. Nws tsim muaj zog cuam tshuam thaum tso cai rau lub sijhawm rau cov npuas raug tshem tawm thiab cov iav kom ruaj khov. Qhov kev siv (gas flow rate thiab siab) yuav tsum tau sib phim rau lub iav qhov tob thiab viscosity.

Bubbling Point Layout: Npaj ntau kab nyob rau hauv ib tug staggered qauv uas npog tag nrho cov dav ntawm lub tank kom convection mus txog rau tag nrho cov ces kaum, tiv thaiv "tuag zones." Qhov sib nrug yuav tsum tau optimized.

Gas Purity: Cov impurities xws li ya raws lossis lwm yam roj av yuav tsum tau zam kom tsis txhob muaj teeb meem tshiab.

Hauv kev xaus, bubbling yog ib qho tseem ceeb thev naus laus zis uas txhaj roj rau hauv cov iav molten los tsim kom muaj zog ntsug thiab kev ntxhov siab. Qhov no tsis yog tsuas yog ua kom nrawm nrawm ntawm cov txheej txheem sab hauv, pab cov npuas me thiab loj sib koom ua ke thiab raug tshem tawm, tab sis kuj ua rau cov txheej txheem tshuaj lom neeg thiab thermal inhomogeneous thiab tshem tawm cov chaw tuag. Yog li ntawd, nws zoo heev txhim kho homogenization efficiency thiab zoo ntawm iav. Txawm li cas los xij, kev tswj hwm nruj ntawm qhov tseem ceeb xws li kev xaiv roj, txoj hauj lwm, zaus, thiab npuas loj yog qhov tseem ceeb kom tsis txhob nthuav tawm cov npuas tsis xws luag, ua rau cov refractory yaig, los yog cuam tshuam cov thawj ntws. Yog li ntawd, thaum nws muaj peev xwm drawbacks, bubbling yog ib tug tseem ceeb technology uas yuav optimized rau ho txhim khu iav manufacturing.