Lub luag haujlwm ntawm cryolite hauv electrolytic aluminium yog dab tsi?
Lub luag haujlwm ntawm cryolite hauv electrolytic aluminium yog dab tsi?
Ua ntej, cryolite yog flux ntawm aluminium kev lag luam, thiab alumina yuav yaj nyob rau hauv cryolite, zoo li ib tug tov.
Ib yam li ntsev yaj hauv dej, cryolite yog cov kuab tshuaj thiab alumina yog cov kuab tshuaj. Lub electrolysis ntawm alumina tsis yog nyob rau hauv lub fact tias "melt electrolysis", qhov tseeb, lub melting yog cryolite, alumina tsuas yog ib tug dispersion, dispersed nyob rau hauv kua cryolite, lub anion nyob rau hauv cov kua yog complex atomic pawg, tsis yog ib tug yooj yim oxygen. ion. Cov alumina yog yaj nrog cryolite ua cov kuab tshuaj thiab tom qab ntawd electrolyzed. Cryolite ua lub luag haujlwm tseem ceeb ntawm no, uas daws cov teeb meem ntawm lub siab melting point ntawm alumina (txog 2 050 degree C), uas tsis yog-conductive, thiab tsis tuaj yeem electrolysis ib leeg. Tom qab cov alumina yaj mus rau hauv cryolite, nws tuaj yeem electrolyzed ntawm qhov kub ntawm 940 980 degree C. Nws yooj yim dua rau yaj dua li yaj, yog li lub ntuj melting point yog qis dua. Nws tuaj yeem hais tias yog tsis muaj cryolite, tej zaum yuav tsis muaj xws li kev lag luam aluminium loj hauv ntiaj teb, tus nqi yuav tsis qis, thiab daim ntawv thov yuav tsis yog qhov dav.
Ob, electrolytic aluminium yuav tsum siv cryolite yog vim li cas:
1, cryolite tsis muaj cov ntsiab lus uas kho cov khoom siv hluav taws xob ntawm txhuas, kev ruaj ntseg zoo, nyob rau hauv cov xwm txheej ib txwm tsis decompose, tsis volatilize, tsis delix, melting point yog siab dua txhuas, zoo hluav taws xob conductivity, txuag hluav taws xob, thiab lwm yam.
2, ntawm qhov kub ntawm electrolytic, qhov ceev ntawm cryolite-alumina kua yog 10% tsawg dua li qhov ntom ntawm txhuas kua, yog li cov kua electrolytic aluminium tuaj yeem tso rau ntawm cathode hauv qab cov electrolyte, uas tuaj yeem txo cov oxidation poob ntawm txhuas, thiab yooj yim heev rau cov qauv ntawm aluminium electrolytic cell.
3. Nws tuaj yeem yaj alumina zoo, thiab cov yaj uas muaj nws tuaj yeem ua electrolyzed hauv qab lub melting point ntawm ntshiab cryolite; Thiab zoo liquidity.
Ntau cov lus nug txog cryolite thov hu rau peb.
