Erosion mechanism
Tshuaj ua haujlwm raufused zirconium corundum cibyog qhov nyuaj thiab hnyav, uas tuaj yeem muab faib ua 4 yam:
1. nag lossis daus ntawm iav theem
The azs bricks on the pool wall are subjected to the action of high-temperature glass liquid for a long time (>1500 degree). Ntawm ib sab, lub iav theem hauv lub cib yuav maj mam yaj thiab nag lossis daus (qhov qis tshaj nag lossis daus kub yog li 1150 degree); Ntawm qhov tod tes, cov kua iav alkaline uas muaj Na2O yuav cuam tshuam cov cib raws lub qhov hws thiab cov kab nrib pleb ntawm lub cev cib, diffuse thiab nkag mus rau ib leeg nrog cov iav precipitated, yog li txo cov viscosity ntawm cov kua iav precipitated thiab nce nws cov fluidity, li no intensifying tus cwj pwm corrosion thiab ncua nws nyob rau hauv qhov tob.
2. Kev puas tsuaj rau lub cev pob txha
Raws li kev yaig ntawm cov kua iav ua kom muaj zog hauv qhov tob, cov pob txha pob txha ua rau lub cev cib tau maj mam nkag mus thiab ncig los ntawm cov kua iav uas muaj Na2O, thiab cov pob txha pob txha pib eroded. Ua ntej, cov yaj mullite decomposes rau hauv -Al2O3 thiab SiO2, uas nyob rau hauv lem txhawb kev hloov dua siab tshiab ntawm -Al2O3 rau hauv -Al2O3. Raws li qhov kub thiab txias, -Al2O3 yog yaj tag rau hauv cov kua iav, thiab cov baddeleyite thiab corundum lattices kuj raug rhuav tshem, thiab tom qab ntawd tawg, tawg, thiab ib nrab yaj. -Al2O3 maj mam yaj hauv iav ntawm qhov kub thiab txias, thiab khaws cia tsawg heev. Raws li cov iav txuas ntxiv mus rau qhov sib txawv thiab nkag mus, cov baddeleyite microcrystals ua dawb, ib feem ntawm cov kua iav thiab tej zaum yuav dhau los ua iav pob zeb, thiab ib feem ntawm cov khoom khaws cia. Txawm hais tias baddeleyite tuaj yeem yaj hauv iav, nws cov solubility tsawg heev. Raws li qhov kub thiab txias hloov pauv, ZrO2 sai sai crystallizes los ntawm cov kua iav los tsim cov pob txha zoo li lossis cov pob zeb baddeleyite.
3. Crystallization ntawm cov zaub mov tshiab
Txij li cov pob txha pob txha ntawm fused zirconium corundum bricks lub cev yog ib nrab yaj hauv cov kua iav, qhov sib xyaw ntawm cov kua iav qub tau hloov pauv. Yog li ntawd, thaum tus piv ntawm SiO2-Al2O3-Na2O nyob rau hauv lub khob kua yog ze rau lub theoretical muaj pes tsawg leeg ntawm nepheline, ib tug loj npaum li cas ntawm nepheline crystals yuav precipitate. Al2O3+2SiO2+Na2O → 2NaAlSiO4(nepheline)
4. Nepheline puas tsuaj
Txij li qhov ceev ntawm nepheline tsawg dua li ntawm lub cev cib, nag lossis daus ntawm nepheline crystals yog nrog los ntawm kev nthuav dav loj, ua rau lub cev cib lub cev xoob. Txawm hais tias lub melting ntawm ib feem ntawm lub crystalline theem nyob rau hauv lub cib nyob rau hauv lub sij hawm no yuav ua rau kom lub viscosity ntawm cov iav kua thiab muaj ib tug tej yam kev sib raug zoo thiab kev tiv thaiv nyhuv ntawm lub xoob qauv, nws tseem tsis tau kiag li thaiv cov airflow, cov khoom thiab iav kua scouring thiab. Lub ntiajteb txawj nqus nyob rau hauv lub kiln, thiab cov kab nrib pleb thiab tev mus rau hauv cov kua iav los tsim cov iav pob zeb. Lub qhov txhab tom qab tev tawm tseem raug eroded thiab scoured los ntawm iav kua thiab txuas ntxiv tev. Qhov tshwm sim yuav inevitably ua rau erosion thiab disintegration ntawm hluav taws xob fused zirconium corundum cib.
Txuas lub neej kev pab cuam hauv iav hluav taws xob melting rauv
Lub khob pas dej ua ke melts horizontally, cov khoom ua kua theem txav horizontally, thiab peb-theem interface yog eroded loj heev tsuas yog rau qhov ntws. Lub khob hluav taws xob melting rauv yog ntsug melting, feem ntau yog txias saum melting. Lub iav kua nto yog npog los ntawm ib txheej ntawm raw khoom, thiab muaj tsawg dua peb-theem interfaces. Vim yog ntsug melting, qhov yaig ntawm lub pas dej ua ke ntawm phab ntsa cib tsis yog qhov tseem ceeb ntawm peb-theem interface, tab sis kev yaig tag nrho, yog li qhov tsis muaj zog txuas ntawm cov hluav taws xob fused corundum cib yog qhov tawg ntawm kev yaig. Nyob rau hauv kev pom ntawm kev yaig mechanism ntawm hluav taws xob fused zirconium corundum cib, cov ntsiab lus ntawm Na2O nyob rau hauv cov khoom siv raw khoom ntawm cov hluav taws xob fused zirconia corundum bricks yuav tsum nruj me ntsis tswj ua ntej. Lub teb chaws tus qauv xav kom cov ntsiab lus ntawm Na2O hauv 33 # WS yog tsawg dua 1.45%, thiab cov ntsiab lus ntawm Na2O hauv 41 # WS yog tsawg dua 1.3%. Cov txheej txheem hluav taws xob melting rauv xav kom cov ntsiab lus ntawm Na2O hauv 33WS tsawg dua 1.35%, thiab cov ntsiab lus ntawm Na2O hauv 41#WS yog tsawg dua 1.05%. Rau qhov yaig ntawm daim duab 2, qhov piv ntawm riser rau cov khoom cib yuav tsum ncav cuag 1.5: 1. Los ntawm lub siab ntawm cov khoom siv riser, qhov seem ntawm qhov pores nyob rau hauv cov khoom cib raug txo kom zoo, lub peev xwm los tiv thaiv kev yaig ntawm cov khoom siv cib ntawm qhov chaw txhaj tshuaj yog txhim kho, thiab qhov chaw txhaj tshuaj yuav tsum tsis muaj qhov pom tseeb shrinkage kab noj hniav.
Rau cov eroded qhov chaw, lub cib pob qij txha raug soj ntsuam nruj me ntsis thaum lub sij hawm sib dhos ntawm fused zirconium corundum bricks, thiab yuav tsum tau tsawg tshaj li 0.3 hli. Qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv yog nruj me ntsis tswj thaum lub sij hawm ci ci txheej txheem los xyuas kom meej qhov nruj ntawm cov pob qij txha cib thaum lub sij hawm tus txheej txheem, yog li txo cov roj nkag, tiv thaiv kev tsim ntawm peb-theem interface ntawm lub cib pob qij txha, thiab txo qhov yaig ntawm cov khoom hauv daim duab 3. Rau kev yaig ntawm cov khoom hauv daim duab 4, qhov dav ntawm lub cib yuav tsum tsawg dua 400mm thaum lub sij hawm tsim cov txheej txheem. Qhov dav dhau yuav ua rau cov cib muaj ntau qhov shrinkage thiab xoob sab hauv; Qhov sib piv ntawm cov riser rau lub cib yuav tsum ncav cuag 1.5: 1, thiab qhov zoo ntawm cov cib tuaj yeem txhim kho los ntawm kev siab thiab tso pa tawm; kev rwb thaiv tsev yog txo nyob rau theem tom ntej ntawm kev ua haujlwm ntawm kiln, thiab tus nqi yaig yog txo los ntawm kev txo qhov kub ntawm cov cib.
