Refractory cib ntawm cement kiln suav nrog siab alumina cib, mullite cib, corundum cib, silica cib, magnesia hlau, magnesia alumina spinel cib thiab lwm yam. Alkali resistant, hnav-resistant, refractory khoom muaj ntau dua, refractory cib cia lub sij hawm ntev dua amorphous, tab sis yuav tsum tau xyuam xim rau qhuav thiab noo noo-pov thawj.
Rotary kiln qhov hluav taws xob thiab cua txias siv. Kev thov: Ob lub hnab ntim refractory tsim muaj zog txhua yam hnav thiab tshuaj lom neeg corrosion vim kev sib koom ua ke ntawm kub clinker, theem nrab cua thiab kub kub. Yog li ntawd, nws yuav tsum tau zoo hnav tsis kam, slag kuj thiab kub poob siab kuj.
Kev xaiv: Txoj siv cua txias feem ntau yog siv lub siab aluminium cib (A1203 cov ntsiab lus 65% ~ 75%), kub poob siab aluminium cib, spinel cib, chrome magnesia cib, phosphate cib; High aluminium cib, refractory pob zeb (corundum aggregate), silicon carbide cib feem ntau yog siv ntawm qhov chaw nres nkoj tawm.
Rotary kiln firing siv. Daim ntawv thov yuav tsum tau: Lub refractory hauv ob sab phlu ntawm lub teb kiln sintering siv yog mas raug rau kub kub thiab tshuaj corrosion (alkali nres). Yog li ntawd, nws yuav tsum tau siv cov hluav taws kub-resistant thiab kub-kub refractory cov ntaub ntawv uas yooj yim rau dai kiln daim tawv nqaij, thiab xaiv magnesium bricks thiab chrome-magnesium cib.
Transition zone of rotary kiln (exothermic reaction zone). Qhov yuav tsum tau muaj: Cov tawv nqaij ntawm qhov cub yuav raug tshem tawm ib ntus, qhov kub thiab txias hloov ntau zaus, lub tog raj kheej kub yog siab, thiab cov tshuaj yaig yog qhov hnyav. Qhov no yuav tsum muaj qhov zoo ntawm kev muaj peev xwm tiv taus qhov kub thiab txias, siab folding lub zog ntawm qhov kub thiab txias, thiab me me elastic modulus. High aluminium aluminium ci ci xaiv ntawm corundum (A1203 cov ntsiab lus 50% ~%), thiab ncaj qha nrog chrome magnesia cib, zoo tib yam chrome magnesia cib, spinel cib sib xyaw.
Preheater thiab calciner. Qhov yuav tsum tau muaj: Kev xaiv ntawm refractory kub rwb thaiv tsev kev ua tau zoo: qhov kub tsis tshua muaj cua daj cua dub tuaj yeem ncaj qha castable (refractory qhob). Alkali resistant, hnav-resistant av nplaum cib yuav siv tau nyob rau hauv cov nram qab no preheaters, calciners thiab txuas hlab, nrog rau ntxiv ntawm thermal rwb thaiv tsev composite txheej. Sab saum toj yog dai nrog firebrick, rov qab nrog slag ntaub plaub, thiab tseem tuaj yeem cam khwb cia nrog castable. Castable yog siv rau txhua qhov khoov. Semi-siliceous av nplaum cib nrog cov qauv ntom tuaj yeem siv rau hauv qhov cub tail ascending flue los tiv thaiv alkali corrosion.
Cement clinker cua txias system. Cov ntaub ntawv refractory siv nyob rau hauv lub grate txias tshuab mas muaj xws li refractory cib, lub teeb cam khwb cia cib, thermal rwb thaiv tsev cib, tshav kub rwb thaiv tsev board thiab hais txog. Feem ntau chrome-magnesium bricks thiab high-purity aluminium cib tuaj yeem siv rau hauv qhov kub thiab txias, txiav hauv caj pas, qhov kub thiab txias cheeb tsam. Av nplaum cib tuaj yeem siv rau hauv qhov chaw kub thiab txias.
Yuav khaws cov firebricks ntev npaum li cas? Cov kev ceev faj cia yog dab tsi?
Kev kub siab resistant cib tuaj yeem khaws cia rau lub sijhawm ntev, tab sis kev saib xyuas yuav tsum tau them rau kom qhuav noo noo-pov thawj, magnesium cib noo noo tsis zoo, noo noo, deterioration, tawg poob. Magnesium bricks yuav tsum tau muab tso rau hauv qhov chaw qhuav thaum nkag mus rau hauv lub Hoobkas thiab npog nrog tarpaulin. Lub peev xwm khaws cia tsis tas sijhawm, tsis txhob hlawv magnesium cib nyob rau yav qab teb los nag yog qhov zoo dua tsis pub dhau 3 lub hlis, tsis tshaj li ib nrab xyoo nyob rau sab qaum teb, qhov raug rho tawm ntawm magnesium bricks tuaj yeem ntev me ntsis. Tiv thaiv kev cuam tshuam thiab kev sib tsoo thaum tuav.
Daim ntawv thov ntau yam ntawm ntau yam refractory cib hauv cement kiln
Av nplaum cib tau zoo hnav tsis kam, txias thiab kub tsis kam, thermal conductivity me me, tab sis kub tsis kam, tshuaj yaig kuj tsis zoo, tsis tshua muaj zog compressive. Firebricks yog pheej yig thiab feem ntau siv nyob rau hauv ntau yam kilns. High alumina cib feem ntau yog siv nyob rau hauv rotary kiln firing siv. Piv nrog av nplaum cib, nws qhov hluav taws kub tsis kam thiab load softening kub yog siab dua, thiab nws cov slag kuj muaj zog dua.
Magnesia refractory cib suav nrog magnesia cib, magnesia aluminium cib thiab chrome-magnesia cib. chrome-magnesia cib siv rau hauv cov cement kiln firing siv yog cov khoom siv alkaline refractory, muaj 55% mus rau 80% MgO thiab 8% mus rau 20% Cr2O3. Muaj zog slag kuj, corrosion kuj, kub tsis kam, siab zog, tab sis loj thermal conductivity, tsis txias thiab kub tsis kam, kim, installation teeb meem. Yog tias siv tau zoo, lub voj voog tuaj yeem raug muab faib ua ob npaug, nrog qee lub chaw tsim khoom siv txog li 400 txog 500 hnub.
Thaum khaws cia magnesia firebrick, yuav tsum tau them nyiaj rau cov ntaub ntawv noo noo, thiab lub sijhawm cia ntev yuav tsum tsis pub tshaj ib nrab xyoo. Thaum tso cib, qhov sib txuas ntev (cib thiab cib yog 2 ~ 3 hli, thiab qhov sib txuas sib txuas (ntiv nplhaib thiab rings) yog 5 ~ 6 hli, txhawm rau tiv thaiv lub cib los ntawm kev tawg thaum nthuav dav ntawm qhov kub thiab txias, vim tias qhov nthuav dav coefficient ntawm magnesium bricks yog txog li ob zaug ntawm high aluminium cib thaum lub qhov cub ci, nws maj mam ua kom sov.
Calcium phosphate cib yog ib yam tshiab ntawm cov khoom siv refractory tsim nyob rau hauv xyoo tas los. Nws yog tsim los ntawm phosphate ua ke nrog burnt bauxite aggregate, nias los ntawm lub tshuab, thiab 42.5% ~ 50% phosphoric acid tov yog siv los ua binder. Cov cib ua los ntawm txhuas phosphate yog phosphate hnav-resistant cib. Ob hom cib saum toj no yog cov cib uas tsis yog-sintered, Al2O3 cov ntsiab lus yog li 80%, nrog rau kub tsis kam, corrosion kuj, txias thiab kub tsis kam, hnav tsis kam, siab zog zoo, tab sis siab thermal conductivity. Cov phosphate cib yog tsim rau kev siv hluav taws xob, thiab phosphate hnav-resistant cib yog tsim rau qhov kawg ntawm txoj siv txias. Phosphate cib hloov siab alumina cib hauv cov cement thiab siv dav hauv kev lag luam cement.