Cov txheej txheem ntawm qhuav barrier refractory yog ua los ntawm cov av nplaum clinker li refractory aggregate, thiab qib peb qib siab aluminium clinker yog ua tiav rau hauv cov sib txawv granular aggregate thiab hmoov, uas yog ua los ntawm micro-hmoov technology thiab cov neeg sawv cev sib txuas.
Cov khoom qhuav yog siv rau hauv txhuas electrolytic cell los ua lub luag haujlwm tiv thaiv kev nkag mus, hauv cov txheej txheem electrolytic aluminium, lub tank hauv ob sab phlu yuav eroded los ntawm crcite, thiab chav thiab txhuas cov kua yuav nkag mus rau hauv cov tshuaj txhuas los ntawm carbon cib seam. mus rau sab phab ntsa ntawm lub refractory cib, rwb thaiv tsev cib, thiab yuav nkag mus los ntawm cov pa roj carbon cathode nyob rau hauv qab ntawm lub tank mus rau hauv lub tshav kub rwb thaiv tsev txheej, uas ua rau kom txo tau lub neej ntawm txhuas electrolytic cell.
Cov khoom siv qhuav yog xaiv raws li tus qauv tsim ntawm electrolytic cell, thiab cov khoom yuav tsum raug xaiv los xyuas kom meej tias qhov kub thiab txias ntawm cov khoom siv carbon cathode yog siab tshaj 850 degree C, vim NaF yuav crystallize hauv qab 850 degree C, ua rau lub ntim. expansion ntawm carbon cathode thiab expansion ntawm cov pa roj carbon cib, txo cov kev pab cuam lub neej. Txoj hauv kev zoo tshaj plaws yog xaiv qhov zoo thermal rwb thaiv tsev cib raws li cov txheej txheem thermal rwb thaiv tsev, thiab siv cov khoom thaiv kom qhuav refractory ntawm cov pa roj carbon cib thiab cov rwb thaiv tsev kub ua cov txheej thaiv thaiv kom tsis txhob nkag mus rau cov khoom tsis zoo xws li NaF.
Kev xaiv ntawm cov barrier qhuav refractory yuav tsum yog m(AL2O3)/m(SiO2) ntau dua 0.9, txhawm rau tiv thaiv kev nkag mus ntawm Na thiab NaF. Cov infiltrated Na thiab NaF tuaj yeem cuam tshuam nrog Al2O3-sio2 cov ntaub ntawv refractory los tsim nepheline (Na2O· Al2O3-2}sio2), thaiv cov porosity thiab tiv thaiv kev nkag mus ntxiv ntawm Na thiab NaF.
Lub luag hauj lwm ntawm cov barrier qhuav refractory yog siv nruab nrab ntawm cov pa roj carbon cib thiab cov cua sov rwb thaiv tsev txheej ntawm sab phab ntsa ntawm aluminium electrolytic cell, uas tuaj yeem tiv thaiv kev nkag mus ntawm Na thiab NaF thiab lwm yam khoom, thiab tiv thaiv cov txheej txheem cua sov. Cov khoom siv qhuav yog siv ncaj qha rau ntawm lub tshav kub rwb thaiv tsev txheej hauv qab ntawm lub tank. Kev tsim kho thickness yog 100 ~ 150mm. Txhawm rau txiav txim siab qhov cuam tshuam los ntawm cov khoom siv qhuav impermeable, lub crucible yog rhuab mus rau 950 degree nyob rau hauv lub cub hluav taws xob, thiab lub kaw crucible yog ib txwm txias rau chav tsev kub nrog lub cub tawg, lub crucible raug tshem tawm, qhov profile yog txiav rau kev soj ntsuam. thiab kev tsom xam, thiab qhov siab ntxiv H2 tom qab cov tshuaj tiv thaiv ntawm qhov chaw qhuav barrier refractory thiab crolyte raug ntsuas, thiab qhov tob tob (H1-H2) raug xam. Lub essence yog qhov siab ntawm cov tshuaj tiv thaiv txheej, uas yog, permeability kuj ntawm cov khoom impermeable.