Yuav ua li cas xaiv hnav-tiv taus castables rau qhov tsis yooj yim xws li cov tshuaj txhaj tshuaj rau ntawm lub qhov ncauj ntawm cov kilns?

Hauv qhov txheej txheem qhuav tshiab txheej txheem ua kom sov, lub qhov ncauj qhov cub, cov tshuaj txhaj tshuaj rau lub raj mis thiab lwm txoj haujlwm raug kev txom nyem los ntawm qhov pom kev kub, kub poob siab, xeb thiab puas tsuaj, thiab yuav tsum tau siv cov khoom siv hluav taws xob tiv thaiv tsis zoo. Raws li qhov xwm txheej ib txwm muaj, tiv tshav kub thiab tiv taus cov khoom siv tau rau cov cement kilns muaj cov zaub mov xws li cov khoom siv rov ua dua tshiab, mullite, andalusite, thiab silicon carbide.

CharacteristicsRaw cov yam ntxwv tshwj xeeb. Refractory tau faib ua calcined refractory thiab hluav taws xob fusion yeeb nkab fittings. Ntawm lawv, cov khoom siv hluav taws xob txuas hluav taws xob txuas ntxiv tau los ntawm yaj cov hlau oxide lossis bauxite hauv lub tshuab cua sov thiab tom qab ntawd dej txias. Cov yeeb nkab sib txuas ua ke muaj cov nplaim hluav taws xob loj, qhov sib txheeb ze siab, ob peb lub qhov cua thiab lub zog siab. Calcined refractory muaj cov nplais me me, ntau lub qhov qhib thiab lub zog qis, tab sis nws muaj cov cua sov zoo dua tuaj. Nyob rau tag nrho, qhov hluav taws kub tsis kam thiab txhuam tsis kam yog qhov zoo heev, tab sis kev tiv thaiv tshav kub tsis zoo, qhov hloov pauv cua sov yog qhov zoo, thiab cov nplaum ntawm alkali-resistant primer tsis zoo heev.

Mullite tseem tau muab faib ua ob hom: calcined thiab fused yeeb nkab fittings. Ntawm lawv, cov yam ntxwv ntawm fused mullite yeeb nkab fittings muaj zog dua. Nyob rau tag nrho, mullite muaj cov yam ntxwv ntawm qhov kub zoo qhov ntsuas qhov ntsuas tau zoo, lub zog ua kom muaj zog siab, muaj zog tiv thaiv kom tsis txhob muaj zog, nruab nrab qib siab kub poob siab tsis kam thiab hloov cua sov tsawg.

Andalusite yog ib qho ntawm cov zaub mov hauv pab pawg kyanite. Kyanite cov zaub mov xa mus rau ntau cov zaub mov sib xyaw nrog cov tshuaj lom Al2O3-SiO2: kyanite, andalusite thiab sillimanite. Qhov muaj feem cuam tshuam ntawm cov hom muaju no yog qhov ua kom rov zoo dua qub, xim dawb thiab ua tau zoo tiv taus. Thaum lub sijhawm tag nrho cov txheej txheem ntawm calcination, lawv hloov mus rau mullite thiab tshuaj lom neeg nrog cov ntsiab lus dej sio2 siab, thiab nrog nrog kev nthuav dav ntxiv (Kyanite yog 16%~ 18%, andalusite yog 3%~ 5%, sillimanite yog 7%~ 8% ).

Thaum 1300 ~ 1350 ℃, kyanite hloov pauv mus rau mullite thiab calcite, thiab hloov pauv nrog qhov ntim ntawm +18%. Kev noj cov kyanite raug txwv vim qhov nce ntxiv. Qhov o tshwm sim los ntawm kev hloov pauv ntawm kyanite tuaj yeem siv los txo qhov kev poob qis ntawm cov khoom siv hluav taws xob tiv thaiv tsis tau, thiab qhov ua rau mullite tuaj yeem siv los txhim kho cov cua sov ua haujlwm tsis kam ntawm cov khoom tawg. Txawm li cas los xij, calcite tshwm sim los ntawm kyanite hloov pauv tsis zoo rau cov cua sov ua haujlwm tsis kam.

Ntawm 1400 ° C, andalusite hloov pauv mus rau mullite thiab high-silicon laminated iav theem, thiab hloov pauv nrog ntim ntawm +4%. Vim tias qhov swell me me, nws muaj txiaj ntsig zoo kom nce kev siv ntawm andalusite. Qhov o tshwm sim los ntawm kev hloov pauv ntawm andalusite tuaj yeem siv los ua kom txo qis ntawm cov ntaub ntawv rwb thaiv tsev uas tsis tau txiav txim siab, thiab qhov ua rau mullite tuaj yeem siv los txhim kho cov cua sov ua haujlwm tsis kam ntawm cov khoom tawg. Qhov sib txawv yog tias qib high-silicon laminated iav theem tshwm sim los ntawm andalusite hloov pauv muaj qhov qis qis nthuav dav nthuav dav coefficient, uas yog txiaj ntsig zoo los txhim kho cov cua sov ua haujlwm tsis kam ntawm refractory castables.

1500 ℃, sillimanite hloov pauv mus rau mullite; thiab hloov pauv nrog ntim ntawm +8%. Hauv kev xav, qhov o tshwm sim los ntawm kev hloov pauv ntawm sillimanite tuaj yeem siv los txo qhov kev poob qis ntawm cov khoom siv hluav taws xob uas tsis hloov pauv, thiab qhov ua rau mullite kuj tseem muaj txiaj ntsig los txhim kho cua sov poob siab ntawm cov khoom siv hluav taws xob tawg.

Yog li ntawd, kyanite feem ntau yog siv los ua tshuaj tua kab mob hauv cov khoom siv rwb thaiv tsev tsis zoo thiab nruab nrab tsis zoo li qub; andalusite feem ntau yog siv los ua tshuaj tua kab mob hauv nruab nrab thiab qib siab uas tsis hloov pauv cov khoom siv hluav taws xob rwb thaiv tsev; qhov hloov pauv kub ntawm sillimanite siab dhau lawm, thiab feem ntau nws tsis xis nyob los koom tes nrog cov khoom siv hluav taws xob tsis zoo. Daim ntawv thov tus neeg sawv cev nthuav dav ntawm cov khoom siv.