Cov cement rotary kiln yog cov cuab yeej tseem ceeb hauv cov txheej txheem tsim cov cement, thiab cov txheej txheem refractory yog ib feem tseem ceeb ntawm cov tshuab hluav taws xob, uas ua lub luag haujlwm hauv kev tiv thaiv lub cev kiln thiab tswj qhov kub kub ua haujlwm hauv qhov cub. Kev puas tsuaj rau cov ntaub ntawv refractory tsis tsuas yog cuam tshuam rau kev tsim khoom, tab sis kuj yuav ua rau muaj kev puas tsuaj loj rau cov khoom siv. Cov hauv qab no yog ib qho kev soj ntsuam ntawm feem ntau ua rau kev puas tsuaj rau lub refractory hauv ob sab phlu ntawm cov cement rotary kiln thiab coj cov kev ntsuas:
1. Thermal expansion squeezesrefractory bricks
Thaum lub qhov cub kub kub nce mus rau ib theem, thermal expansion yuav ua rau lub siab nyob rau hauv lub axial kev taw qhia ntawm lub kiln, ua rau cov uas nyob ib sab refractories bricks rau sib sib zog nqus. Thaum lub siab ntau dua lub zog ntawm refractory hluav taws cib, nws yuav ua rau lub cib nto tev tawm. Cov kev ntsuas hauv qab no yuav tsum tau ua:
(1) Dry-ntev refractory firebricks, teeb tsa cov ntawv sab nrauv, thiab tawm 2 hli hluav taws cov av nkos rau ntub-ntev refractories cib.
(2) Cia ib lub nplhaib ruaj khov uas tsim nyog.
2. Hlau phaj kev nyuaj siab puas
Thaum kub kawg ntawm lub refractory cib, veneer hlau phaj reacts chemically nrog magnesium oxide nyob rau hauv lub magnesia cib ntawm qhov kub thiab txias los tsim magnesia-hlau tebchaw, uas ua rau kom lub ntim thiab nyem lub refractory hluav taws cib, ua rau kab rov tav fractures. Raws li qhov teeb meem no, kev xyaum ntawm veneer hlau ntawm refractory firebricks yuav tsum tau hloov los yog hloov nrog hluav taws av nplaum.
3. Qhov loj-qhov sib tw thiab dislocation ntawm hluav taws cib
Vim yog qhov xoob xoob thiab qhib qhov qhib thiab kaw ntau zaus, lub plhaub kiln yog deformed, ua rau lub plhaub kiln thiab qhov txias ntawm lub hauv ob sab phlu kom txav mus rau ib leeg, ua rau lub hauv ob sab phlu sib tw thiab dislocate, thiab lub cib nto rau tawg thiab poob tawm. Cov kev ntsuas hauv qab no yuav tsum tau ua:
(1) Thaum lub sij hawm masonry, qhov loj ntawm lub refractory hluav taws cib yuav tsum tau hammered khoom nrog ib tug ntoo rauj, lub locking cib yuav tsum tau muab xauv, thiab ib tug wedge hlau yuav tsum tau ntxiv rau lub thib ob lub sij hawm.
(2) Ua kom ruaj khov thermal system.
(3) Qhov deformed ib feem ntawm lub plhaub kiln yuav tsum tau leveled nrog high-temperature cement.
4. Ovality stress extrusion
Vim tias qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv ntawm lub log log shims, lub plhaub muaj qhov loj dua ovality, ua rau cov cib refractory tau nyem. Lub ovality ntawm lub tog raj kheej yuav tsum tau xyuas tsis tu ncua. Yog tias tus nqi ovality siab tshaj 1/10 ntawm lub qhov cub, lub ncoo yuav tsum tau hloov los yog cov ntaub qhwv hlau yuav tsum tau ntxiv los kho qhov sib txawv ntawm lub log.
5. Xauv hlau kev ntxhov siab extrusion
Thaum xauv cov cib, ntau lub xauv hlau yuav nruj heev, uas yuav ua rau cov cib grooves ntawm qhov chaw xauv. Cov kev ntsuas hauv qab no yuav tsum tau ua:
(1) Ntawm qhov ntsuas qhov ntsuas tib yam, tus naj npawb ntawm cov xauv hlau yuav tsum tsis pub tshaj 3.
(2) Qhov kev ncua deb ntawm cov xauv hlau yuav tsum tau sib cais raws li qhov ua tau.
(3) Qhov nruj ntawm qhov qhib sab hauv thiab sab nrauv yuav tsum zoo ib yam thaum kaw cov cib.
(4) Lub xauv hlau yuav tsum tau khaws cia kom deb ntawm qhov sib tsoo nyias li ua tau.
6. Cib tuav lub nplhaib nyem refractory cib
Cov cib khaws cia (tshwj xeeb-zoo li cib) ntawm lub cib tuav lub nplhaib yog tawg thiab tawg vim extrusion. Nyob rau hauv cov ntaub ntawv no, ib leeg-khiav cib tuav lub nplhaib yuav tsum tau hloov mus rau ib tug ob-txoj kev cib tuav lub nplhaib, thiab tag nrho cov cib yuav tsum tau muab tso rau ntawm lub cib tuav lub nplhaib kom tsis txhob ua tshwj xeeb-zoo li tus cib.
7. Cua sov
Lub zos overheating ntawm qhov kub thiab txias nyob rau hauv lub kiln ua rau lub refractory bricks yaj thiab tsim pits. Txhawm rau zam qhov teeb meem no, lub qhov cub yuav tsum tau kho kom raug thiab cov khoom siv refractory tsim nyog yuav tsum tau xaiv nyob rau hauv ntau qhov chaw.
8. Thermal shock tshwm sim
Lub thermal stress tshwm sim los ntawm qhov kub thiab txias hloov pauv ua rau lub cib nto tev thiab tawg, uas feem ntau yog tshwm sim los ntawm kev qhib thiab kaw ntawm huab cua txias thiab kub. Kev ua haujlwm ntau lawm yuav tsum ua kom ruaj khov thiab tsim kom muaj cua sov thiab cua txias qhov system yuav tsum tau tsim.
9. Tshuaj lom neeg puas tsuaj
Cov roj theem alkali ntsev tebchaw nkag mus rau hauv qhov khoob ntawm lub cev cib, condense thiab solidify, thiab tsim cov kab rov tav permeable txheej ntawm alkali ntsev nyob rau hauv lub cib lub cev. Cov ntsiab lus alkali ntsev nkag mus rau hauv qhov cub yuav tsum tau txo thaum lub sij hawm tsim khoom.
Los ntawm cov txheej txheem kev puas tsuaj saum toj no ntawm refractory bricks, nws tuaj yeem pom tau tias cov qauv tsim ntawm cov khoom siv refractory tuaj yeem ua tau zoo rau kev pab cuam lub neej ntawm cov khoom siv refractory, thiab cov kws tshaj lij thiab cov neeg ua haujlwm masonry yog qhov tseem ceeb hauv kev ua kom zoo ntawm cov khoom siv refractory.
Cov ntsiab cai ntawm kev xaiv cov khoom siv refractory
Thaum xaiv cov ntaub ntawv refractory, cov hauv qab no yuav tsum tau ua raws li:
(1) Kub kub kuj. Nws tuaj yeem ua haujlwm hauv ib puag ncig siab dua 800T rau lub sijhawm ntev.
(2) Lub zog muaj zog thiab zoo hnav tsis kam. Cov ntaub ntawv refractory nyob rau hauv lub teb kiln yuav tsum muaj ib tug tej yam mechanical lub zog los tiv thaiv kev nthuav kev nyuaj siab nyob rau hauv high kub thiab kev nyuaj siab los ntawm lub deformation ntawm lub teb kiln plhaub. Nyob rau tib lub sijhawm, vim qhov hnav ntawm qhov cub hluav taws xob thiab cov pa roj flue ntawm cov khoom siv refractory, cov khoom siv refractory yuav tsum muaj kev hnav zoo.
(3) Zoo tshuaj stability. Los tiv thaiv kev yaig ntawm cov tshuaj lom neeg hauv cov pa roj flue.
(4) Zoo thermal stability. Muaj peev xwm tiv taus cov kev ntxhov siab hloov hauv lub xeev kub. Thaum lub cub tawg tau nres, pib, thiab kev ua haujlwm rotating tsis ruaj khov, qhov kub thiab txias hauv qhov cub hloov pauv zoo heev, thiab yuav tsum tsis txhob tawg lossis tev.
(5) Thermal expansion stability. Txawm hais tias lub thermal expansion coefficient ntawm lub plhaub rotary kiln ntau dua qhov nthuav coefficient ntawm cov khoom siv hluav taws xob refractory, lub plhaub kub feem ntau yog nyob ib ncig ntawm 10000 degree, thaum qhov kub ntawm cov khoom siv refractory feem ntau yog siab tshaj 8001 degree. Qhov no tuaj yeem ua rau cov khoom siv refractory nthuav dav ntau dua li lub plhaub kiln thiab poob yooj yim.
(6) Tsawg porosity. Yog hais tias lub porosity siab, cov roj flue yuav nkag mus rau hauv cov khoom siv refractory thiab erode cov khoom refractory.
