Influencing yam ntawm hnav thiab tsim kua muag ntawm refractory hauv ob sab phlu ntawm cement rotary kiln

Raws li cov cuab yeej tseem ceeb rau calcination ntawm cov cement clinker hauv cov nroj tsuag cement, cov rotary kiln kuj tuaj yeem siv rau hauv kev lag luam txiv qaub. Nws muaj cov yam ntxwv ntawm cov zis loj, cov khoom tsis sib xws calcination, thiab ruaj khov ntau lawm. Feem ntau siv cov ntaub ntawv refractory feem ntau suav nrog siab alumina cib, phosphate bonded siab alumina cib, anti-stripping siab alumina cib, mullite alkali-resistant composite bricks, silica-molded cib, magnesia refractory cib, steel fiber reinforced refractory castables, thiab tsawg cement castables. Anti-skinning castable, thiab lwm yam.

Rotary kiln cov cuab yeej tuaj yeem muab faib ua rau pem hauv ntej kiln qhov ncauj, thaj chaw hloov pauv qis, thaj chaw tua hluav taws, thaj chaw hloov pauv sab saud, thaj chaw decomposition thiab lub qhov ncauj tom qab. Raws li kev khiav hauj lwm ib puag ncig thiab qhov kub thiab txias ntawm txhua qhov chaw, hauv kev ua haujlwm ntawm cov khoom siv hluav taws xob, lub refractory hauv ob sab phlu yuav raug cuam tshuam los ntawm kev hloov pauv ntawm lub tog raj kheej thiab cov khoom siv, kev cuam tshuam ntawm combustion flue gas ntawm cov thee. Kev txhaj tshuaj yeeb nkab thiab cov nqi kub kub, thiab kev yaig ntawm cov pa phem, thiab lwm yam, thiab tseem suav nrog kev tsim cov qhov cub masonry, refractory zoo, masonry Lub tsev zoo, qhov cub yuav tsum, thiab lwm yam, yuav ua rau lub neej luv luv ntawm cov khoom siv hluav taws xob.

Txhawm rau kom ntseeg tau tias lub sijhawm ntev thiab kev nyab xeeb ntawm kev ua haujlwm tsis tu ncua ntawm lub tshuab hluav taws xob, lub tshuab hluav taws xob refractory ntawm lub tshuab hluav taws xob yuav tsum ruaj khov thiab ntev li ntev tau, tab sis muaj ntau yam cuam tshuam rau lub neej kev pab cuam ntawm lub qhov cub rotary. Lub refractory hauv ob sab phlu ntawm lub kiln yog feem ntau raug rau peb yam: mechanical stress, thermal stress thiab chemical erosion. Lub luag haujlwm ntawm.

1. Kev cuam tshuam ntawm cov neeg kho tshuab kev nyuaj siab ntawm cov khoom siv refractory ntawm cov teb kiln hauv ob sab phlu:

Nyob rau hauv cov txheej txheem ntau lawm ntawm lub teb kiln, tus txheeb ze txav ntawm lub tog raj kheej, cov ntaub ntawv, plua plav-laden rauv gas, thiab lwm yam thiab lub puab hauv ob sab phlu nws tus kheej ua rau lub refractory yuav raug rau lub ntiajteb txawj nqus load thiab puas. Thaum cov neeg kho tshuab kev nyuaj siab load tshaj lub zog txwv uas lub refractory tuaj yeem tiv taus Lub sijhawm no, nws yuav ua rau muaj kev puas tsuaj sai rau cov khoom siv refractory.

Lub ntsiab mechanical stress generating yam yog raws li nram no:

(1) Lub tog raj kheej yog deformed. Tag nrho qhov hnyav ntawm cov khoom siv refractory, cov khoom siv thiab lub thoob lub cev hauv lub qhov cub ntau tshaj lub zog ntawm lub thoob lub cev los yog qhov kub kub hauv zos kub heev. Kev puas tsuaj thiab peeled cib hauv ob sab phlu tshwm sim.

(2) Axis offset. Lub log tsheb, kev txhawb nqa rau cov menyuam, cov menyuam txhawb nqa thiab txhua qhov chaw tawg ntawm qhov chaw ntawm lub axis ntawm lub qhov cub yuav tsum nyob rau hauv txoj kab ncaj nraim. Raws li kev cuam tshuam ntawm nws tus kheej lub ntiajteb txawj nqus, lub hauv paus axis yuav hloov. Tom qab lub sijhawm ua haujlwm, cov log tsheb thiab cov menyuam yuav muaj kev sib txawv ntawm kev hnav thiab ua haujlwm. Lub peev xwm load-bearing ntawm txhua qhov kev txhawb nqa ua tsis sib xws, uas ua rau cov axis intensifies. Tus nqi ntawm offset, cov ntaub ntawv refractory yuav puas los yog txawm poob vim extrusion.

(3) Kev tsim kho zoo. Vim yog tsis tsim nyog tsim los yog teeb meem masonry, cov ntaub ntawv refractory yog loosened thaum lub sij hawm ua hauj lwm, ua rau misalignment thiab distortion, thiab thaum lub sij hawm ua hauj lwm tas mus li ntawm lub rotary kiln, tus txheeb ze txav ntawm lub tog raj kheej thiab cov lined refractory khoom tshwm sim, thiab cov ntaub ntawv refractory yog ib qho kev sib koom ua ke. cuam ​​tshuam. Cov nyhuv ua rau extrusion dislocation, thiab txawm spalling los yog txawm poob tawm.

2. Kev cuam tshuam ntawm thermal stress ntawm cov ntaub ntawv refractory ntawm lub teb kiln:

Thermal stress txhais tau hais tias thaum lub sij hawm cua sov txheej txheem ntawm lub qhov cub, cov ntaub ntawv refractory yog extruded vim txawv degrees ntawm thermal expansion, thiab vim hais tias lawv tsis tuaj yeem nthuav dav, thaum lub zog ntau tshaj lub zog ntawm cov khoom siv refractory nws tus kheej, cov khoom refractory nyob rau hauv lub kiln. yuav puas, Peeling thiab lwm yam tshwm sim. Tsis tas li ntawd, nrog rau kev ua haujlwm ntawm lub qhov cub, lub sijhawm hloov pauv hauv qhov kub thiab txias ntawm cov khoom siv refractory yuav cuam tshuam rau nws; thiab thaum lub kiln pib thiab nres, qhov kub thiab txias hloov pauv ntawm qhov kub thiab txias yuav cuam tshuam rau hauv ob sab phlu ntawm lub kiln. Kev cuam tshuam ntawm qhov kub thiab txias hloov ntawm lub kiln hauv ob sab hauv lub kiln kuj yog ib qho laj thawj rau kev puas tsuaj ntawm cov kiln hauv ob sab phlu.

3. Kev cuam tshuam ntawm cov tshuaj tua kab mob ntawm cov khoom siv refractory ntawm cov teb kiln:

Cov tshuaj tua kab mob ntawm cov ntaub ntawv refractory nyob rau hauv rotary kiln feem ntau yog los ntawm calcination ntawm raw cov ntaub ntawv thiab cov roj nws tus kheej. Cov impurities hauv cov khoom siv raw muaj xws li SiO2, Fe2O3, Na2O, K2O, thiab lwm yam, thiab cov impurities hauv cov roj S, P, Cl thiab lwm yam sib xyaw. Cov impurities no yog immersed nyob rau hauv ib puag ncig kub. Hauv cov khoom siv refractory, cov tshuaj tiv thaiv tshwm sim nrog cov refractory lining matrix, ua rau muaj kev puas tsuaj rau cov khoom siv refractory. Cov tshuaj lom neeg cov tshuaj tiv thaiv ntawm cov khoom siv theem ua kua thiab qhov chaw ntawm cov refractory ntawm qhov kub thiab txias, nrog rau kev nkag mus thiab yaig ntawm cov khoom tsis zoo xws li alkali ntsev, ua rau cov txheej txheem txheej txheej ntawm cov refractory rau tev thiab tawg thaum nws ntsib kev sib xyaw ua ke. cuam ​​tshuam ntawm thermal thiab mechanical stress.