Purification mechanism ntawm ceramic ua npuas ncauj lim

Ceramic ua npuas ncauj lim tuaj yeem cuam tshuam kev suav nrog hauv cov kua hlau thiab txhim kho kev ua haujlwm zoo thiab tawm los, ceramic ua npuas dej lim muaj plaub lub tswv yim tseem ceeb los ua kom huv si ua kua hlau.
(1) Floating cais mechanism
Tom qab tso lubceramic ua npuas ncauj limnyob rau hauv lub pouring system, qhov kev tiv thaiv ntawm cov kua hlau ntws tus nqi nce, thiab cov kua hlau nyob rau hauv lub pouring system yog tag nrho ntawm lub xeev, thiaj li mus ua si lub slag blocking muaj nuj nqi ntawm lub pouring system. Nyob rau tib lub sijhawm, cov kua dej ntws tawm los ntawm qhov ncaj sprue yog throttled los ntawm lub lim, cov kua hlau nyob twj ywm luv luv hauv qhov ncaj sprue, thiab cov slag nrog me me ntom ntom ntab nce thiab sib cais, uas tuaj yeem tsim cov nyhuv tib yam ntawm kev txhaj tshuaj hauv qab. pouring system. Thaum cov kua hlau hla dhau lub
Ceramic ua npuas ncauj lim mus txuas ntxiv, ntawm ib sab, qhov ntom ntawm me me slag ntab, ntawm qhov tod tes, zoo txo ​​lossis tshem tawm cov eddy tam sim no.
(2) "Cov ncuav qab zib lim" mechanism
Ceramic ua npuas ncauj limyog nkhaus channel, tuaj yeem ua tau zoo txhua yam slag thaiv, ntau qhov loj dua lub qhov lim hauv lub slag entrapment yog ntes ntawm qhov kawg ntawm lub lim. Nrog rau qhov nce nyob rau hauv tus naj npawb ntawm ntes inclusions, nyob rau hauv lub lim inlet kawg ntawm qhov chaw ntawm lub tsim ntawm loj pieces ntawm inclusions generated los ntawm lub "filter ncuav mog qab zib". Lub "ncuav mog qab zib" ua rau cov kua ntws nyias, yog li cov kev suav nrog me dua qhov loj ntawm lub lim kuj tseem raug ntes nyob rau hauv "ncuav mog qab zib".
(3) Adsorption mechanism
Lim muab tso rau hauv kab noj hniav ntawm tus ntoo khaub lig channel los yog sab hauv sprue, pom kev ua haujlwm yog kev sib sib zog nqus pom, thaum thawj strand ntawm molten hlau tuaj txog ntawm qhov kawg ntawm lub lim, ua rau cov kua ntws thiab ua npuas ncauj adsorption tshwm sim, tib yam. lub sij hawm, cov kua ntws yuav tshwm sim "kev cuam tshuam" tshwm sim, lub lim nws tus kheej muaj cov nyhuv thaiv, qee qhov impurities nyob rau hauv ib lub siab, vim yog impurities thiab cov khoom ua npuas ncauj ceramic mesh. Qee qhov kev koom ua ke nyob rau hauv ib qho kev siab, vim muaj kev sib koom ua ke thiab cov khoom ua npuas ncauj ceramic mesh thav duab zoo ib yam li "kev sib txuas lus sib txuas" kev sib raug zoo, kom nws yooj yim rau lubricate thiab adsorption, qhov adsorption no feem ntau tsis yog xaiv ntau-molecular txheej ntawm lub cev. adsorption yog qhov tseem ceeb tshaj plaws, suav nrog hauv cov lim mesh thav duab adsorption txheej los ntawm txheej, kom txog rau thaum qhov thaiv.
(4) Rectification nyhuv
Thaum cov hlau molten ntws los ntawm cov lim dej ceramic, nws tau muab faib ua ntau qhov me me ntawm cov strand ntws, thiab nws txoj kab uas hla yog me me, kom cov Reynolds tus naj npawb (Re = vD / γ) ua me me, kom cov kua ntws ntws. rau laminar flow. Thaum cov kua hlau yog nyob rau hauv lub laminar flow xeev, vim qhov ceev ntawm molten hlau yog ntau dua li qhov ceev ntawm inclusions, yog li cov inclusions muaj sij hawm txaus los ntab tawm, yog li covceramic ua npuas ncauj limkuj tseem tuaj yeem pab hauv kev sib tsoo channel slag blocking, pouring system tom qab tso lub lim, cov kua hlau ntws tsis kam nce, nyob rau hauv tus ntoo khaub lig-cam khwb cia channel nyob rau hauv cov dej ntws ntawm cov kua hlau yog ib qho yooj yim los tsim ib tug tag nrho cov ndlwg, thiab ua rau lub cross-cast channel nyob rau hauv lub ndlwg ntawm cov kua hlau yog ib qho yooj yim mus tsim ib tug tag nrho cov ndlwg, thiab ua tus ntws tus nqi qis dua, conducive mus rau lub floating ntawm inclusions thiab khaws cia nyob rau hauv lub sab saum toj nto ntawm tus ntoo khaub lig-cam khwb cia channel.