Yuav daws cov teeb meem ntawm cov khoom siv refractory li cas hauv Cement Rotary Kiln
Thaum lub sijhawm ua haujlwm ntawm cov cement rotary kiln, feem ntau muaj kev ua txhaum xws li qe tsim, ya xuab zeb, snowman ua thiab lub nplhaib tsim. Cov faults no tsis tsuas yog cuam tshuam rau kev ua haujlwm ntawm lub qhov cub, tab sis kuj cuam tshuam rau lub neej kev pab cuam ntawm lub cub tawg hauv ob sab phlu refractory. Txhawm rau daws cov teeb meem no, peb yuav tsum nkag siab txog kev tsim cov txheej txheem ntawm cov kev ua txhaum no, rhuav tshem cov txheej txheem ntawm kev ua txhaum, thiaj li ua tiav lub hom phiaj ntawm cov khoom lag luam siab, siab zoo thiab kev siv tsawg.
Niaj hnub no peb yuav tham txog lub voj voog ntawm cov cement rotary kiln. Cov qub thiab tom kawg muab faib ua peb hom. Ntawm lawv, qhov nyuaj tshaj plaws los nrog yog lub nplhaib rov qab.
1. Sulfur puag ncig
Lub nplhaib thioalkali yog ib lub voj voog tsim nyob rau hauv thaj chaw decomposition, uas tsis tsuas yog muaj ntau cov khoom tsis haum, tab sis kuj muaj qee yam minerals, xws li 2c2s. CaSO4 and 2c2s? CaCO 3.
Cov txheej txheem tsim ntawm thioalkali nplhaib yog tias ntau cov khoom tsis haum tshuaj ua raws li cov nplaum. Thaum C2S ruaj khov lossis hloov mus rau 2c2s?CaSO 4thiab 2c2s? Hauv CaCO3, kev hloov pauv ntawm -C2S- -C2S tsis tshwm sim, thiab nws tsis tuaj yeem nrog kev hloov pauv los ua hmoov tshwm sim, thiab muaj lub voj voog sulfur-alkali.
Yog li ntawd, txoj kev tiv thaiv thiab kev tswj ntawm lub voj voog sulfur-alkali yog raws li hauv qab no:
① Tswj cov sulfur thiab alkali cov ntsiab lus ntawm raw khoom thiab roj;
② Ua kom qis qis ntawm sulfur thiab alkali hauv qhov cub;
③ Lub nplhaib sulfur-alkali raug rhuav tshem los ntawm kev tua hluav taws kub.
2. Pem hauv ntej nplhaib
Lub nplhaib pem hauv ntej yog lub nplhaib txuas nrog rau qhov chaw txias. Thaum cov khoom nyob rau hauv lub kiln nkag mus rau hauv qhov chaw txias los ntawm qhov chaw tua hluav taws, ib feem ntawm cov clinker uas tsis tuaj yeem ua tiav tag nrho ntawm cov tawv nqaij ntawm qhov cub yog tsim rau ntawm qhov chaw. Yog tias nws tsis ua haujlwm raws sijhawm, nws yuav nce siab thiab siab dua thiab txhim kho mus rau hauv lub nplhaib pem hauv ntej.
Qee qhov kev paub dhau los hauv kev tuav cov voj voog ua ntej
Thaum lub nplhaib tsim txoj haujlwm tam sim no nyob deb ntawm qhov chaw nres nkoj tawm, nws feem ntau yog vim lub nplhaib tsim nyob rau hauv pem hauv ntej ntawm cov thee txhaj tshuaj yeeb nkab rau lub sijhawm ntev. Nyob rau hauv tus txheej txheem ntawm kev kho mob, cov thee txhaj tshuaj yeeb nkab yog rub tawm thiab qhov kub thiab txias ntawm lub taub hau lub taub hau tau raug tsa kom ua kom lub nplhaib pem hauv ntej hlawv.
Thaum lub nplhaib tsim txoj haujlwm tam sim no nyob ze rau qhov chaw nres nkoj tawm, nws yog vim lub nplhaib tsim tom qab lub sijhawm ntev ntawm cov yeeb nkab txhaj tshuaj. Nyob rau hauv cov txheej txheem ntawm kev kho mob, cov thee txhaj tshuaj yeeb nkab yog rub tawm, cov cua ntws hauv nruab nrab thiab cov cua nruab nrab yog qhov tsim nyog, thiab cov cua kub nruab nrab yog nce. Qhov no tuaj yeem ua rau qhov kub thiab txias, ua rau thaj chaw tua hluav taws txav mus rau pem hauv ntej, thiab nce lub nplhaib sab hauv. Thaum lub nplhaib tam sim no ua rau kub nce thiab cov kua theem viscosity qis dua li cov khoom siv hauv qhov cub, lub nplhaib pem hauv ntej yog maj mam hauv av los ntawm cov khoom siv hauv qhov cub tom qab 2-3 teev.
(3) Yog hais tias tus txheej txheem qub tsis tuaj yeem hlawv lub nplhaib pem hauv ntej, qhov nyiaj ntawm cov thee, qhov nyiaj ntawm cov thee thiab cov cua nruab nrab tuaj yeem txo kom tsim nyog. Thaum tus Tsov tus tw kub qis, rub lub coal txhaj yeeb nkab mus rau sab nraud, thiab lub nozzle yog tsom rau cov khoom sib txuas. Tom qab cov khoom tsis zoo ua ntej raug rho tawm haujlwm ntawm qhov kawg ntawm qhov cub nkag mus rau hauv qhov chaw tua hluav taws, cov nplaim hluav taws tuaj yeem ua kom luv thiab lub nplhaib pem hauv ntej raug yuam kom hlawv.
④ Ua ntej kev kho mob, peb yuav tsum tau saib xyuas kev kho mob, ua tib zoo saib xyuas cov kev hloov pauv ntawm cov khoom tuaj, nce lossis txo cov thee noj raws li qhov xwm txheej calcination, kho cov nplaim taws, thiab tiv thaiv kev puas tsuaj rau cov tawv nqaij ntawm qhov cub, poob ntawm cov khoom siv raw lossis hlawv tawm cov ntaub ntawv refractory los yog cov cuab yeej siv tshuab thiab hluav taws xob.
3. Lub nplhaib rov qab
Lub tom kawg yog ib lub nplhaib tsim nyob rau hauv kev sib tshuam ntawm lub community launch thiab hloov chaw. Muaj kev sib raug zoo ntawm lub nplhaib rov qab kiln thiab cov khoom siv qis melting nyob rau hauv lub kiln. Nws kuj tseem cuam tshuam nrog cov hmoov tshauv thee. Yog li ntawd, lub nplhaib tom kawg tseem hu ua pulverized thee nplhaib.
Thaum cov khoom siv hloov pauv nkag mus rau thaj chaw tua hluav taws, nws yuav raug thaiv los ntawm cov tawv nqaij ntawm qhov cub. Qee cov ntaub ntawv nyob twj ywm rau qee lub sijhawm ua ntej nkag mus rau hauv qhov cub siv. Vim tias qhov kub ntawm cov khoom siv hauv qhov cub kub nce los yog muaj qee cov khoom siv qis, qhov no ntawm cov khoom siv tuaj yeem ua raws li cov tawv nqaij ntawm lub qhov cub, tsim lub nplhaib hauv paus. Tom qab tsim lub nplhaib tom qab, nws qhov protruding tuaj yeem cuam tshuam qhov ntws ntawm cov pa hauv lub kiln, thiab ua raws li cov roj pulverized hauv lub kiln roj los tsim ib lub nplhaib pulverized thee. Yog tias lub nplhaib rov qab muaj zog tsawg, thaum lub nplhaib rov qab ntev yog qhov loj, cov nyhuv rwb thaiv tsev yuav raug kho kom zoo, lub qhov cub lub cev kub nyob ze ntawm lub nplhaib rov qab yuav raug txo kom tsawg, lub qhov cub lub cev contraction yuav tsim lub siab ntawm lub hauv ob sab phlu, thiab tej zaum yuav ua rau lub cev kub nyob ze ntawm lub nplhaib rov qab. rov qab nplhaib vim yog siab. Yog tias muaj ntau qhov tsis ruaj tsis khov C2S nyob rau hauv lub nplhaib rov qab, ib qho -C2S- -C2S kev hloov pauv tshwm sim thaum qhov kub thiab txias tau txo mus rau qhov tsim nyog, ua rau pulverization thiab vau. Txawm li cas los xij, yog tias lub nplhaib tsis raug puas tsuaj rau ntau yam laj thawj, nws yuav ua rau muaj kev txhaum nyuaj.
Cov tom kawg yog cuam tshuam nrog cov thee, tshwj xeeb tshaj yog cov hmoov tshauv thiab cov hmoov tshauv melting point ntawm thee. Raws li Zhang Yanwei txoj kev tshawb fawb, thaum siv Dengfeng No. 2 thee nrog cov tshauv ntws kub ntawm 1388 degree, cov cement kiln feem ntau tsim ib lub voj voog. Yog tias Jincheng thee nrog qhov kub siab tshaj 1500 degree siv, kev tsim lub nplhaib rov qab tuaj yeem zam tau.
Yog hais tias lub nraub qaum tsis ua rau nws tus kheej, nws yuav ntev dua thiab siab dua. Yog tias nws loj hlob mus rau ib qho twg, kev kho mob yuav tsum tau ua. Lub nplhaib tsim tom qab kev kho mob feem ntau ua tiav los ntawm kev kub hnyiab thiab txias flash. Raws li Zhang Gaofei qhov kev paub dhau los, qhov kev sib txuas deb ntawm kev sib txuas yog qhov txias, thiab qhov ze ntawm kev sib txuas yog qhov kub.
① Thaum daim tawv nqaij ntev thiab tuab los yog muaj lub nplhaib me ntsis hauv lub qhov cub, cov yeeb nkab yuav tsum tau rub tawm kom txav txoj hauj lwm ntawm txoj hlua hluav taws xob rau pem hauv ntej, txo qhov kub thiab txias, hloov qhov chaw ntawm cov hmoov tshauv, thiab ua kom cov tawv nqaij tuab thiab ntev kiln maj mam tawg. Nyob rau tib lub sijhawm, kho qhov sib xyaw ua ke ntawm huab cua thiab thee, ua kom lub zog ntawm cov hluav taws xob pulverized, kom qhov kub qis ntawm ob qho kawg ntawm thaj chaw kub siab tsis txuas ntxiv, thiab tiv thaiv kev loj hlob ntawm lub nplhaib cov hauv paus hniav.
Thaum cov tawv nqaij tuab thiab ntev ntev hauv cov kiln raug kho tsis raug lossis tsis raws sijhawm, nws yuav ua rau muaj kev loj hlob sai ntawm cov tawv nqaij kiln, kom cov tawv kiln tuab tuaj yeem ua rau lub nplhaib rov qab. Ua ntej txiav txim siab txoj hauj lwm thiab lub thickness ntawm lub nplhaib thiab cov tsub zuj zuj tom qab lub nplhaib, thiab tom qab ntawd txo tus nqi pub, nce qhov kub thiab txias, ntxiv dag zog rau lub pre-firing, maj mam ua kom lub cub tawg ceev, tswj kev sib hloov ceev ntawm lub kiln, thiab ib feem. ntawm tsub zuj zuj tom qab lub nplhaib. Lub sijhawm no, nws tsis tsim nyog los txo qhov kub ntawm cov thee nkag mus rau lub nplhaib thee, yog li txo qhov kub ntawm cov nplaim taws. Tom qab 4-5 teev ntawm combustion, lub thee txhaj yeeb nkab yog rub tawm thiab rov ua dua, kom lub nplhaib lub cev poob vim qhov kub thiab txias. Txhawm rau kom ua tiav kev sib xyaw ntawm cov thee pulverized thiab tiv thaiv kev txhim kho ntawm lub nplhaib tsim, nws yog ib qho tsim nyog yuav tsum tau hloov cov khoom siv raw, txo cov kua theem cov ntsiab lus ntawm cov khoom, tsim nyog hloov cov thee zoo, thiab siv high-volatile thiab qis tshauv thee.
Feem ntau, nws yog ib qho nyuaj rau tsim rings tom qab sintering. Qee lub sij hawm lub nplhaib lub cev yog qhov nyuaj heev, yog tias lub nplhaib kub hnyiab tau ntev dhau lawm, nws yuav hlawv cov tawv nqaij thiab hauv ob sab phlu, los yog nyob rau hauv qhov kev hloov ntawm cov tawv nqaij ntawm qhov cub yog ntev thiab tuab, thiab tom qab ntawd lub nplhaib thib ob yog tsim tom qab lub nplhaib lub cev. . Yog li ntawd, yuav tsum ceev faj thaum kho. Raws li kev tiv thaiv ntawm cov tawv nqaij kiln, ob qho tib si ua ntej thiab tom qab, ua tib zoo ua haujlwm kom tsis txhob muaj cov nplaim taws ntau dhau, tsis txhob hlawv cov tawv nqaij thiab hauv ob sab phlu, uas ua rau poob ntau dua.
4 Siv cov refractories kom qeeb qhov tsim ntawm cov nplhaib
Txhawm rau ua kom qeeb ntawm kev tsim cov rings, refractories tuaj yeem siv ntxiv rau kev tswj cov khoom siv raw thiab cov roj, txhim kho cov khoom siv hluav taws xob, txhim kho kev sib txuas, siv cov khoom nyias nyias ceev tig ua haujlwm thiab stabilizing thermal systems.
Cov txiaj ntsig kev sim qhia tau hais tias lub nplhaib thioalkali tuaj yeem kho tau los ntawm kev siv cib uas muaj SiC lossis ZrO2, lub nplhaib thioalkali tuaj yeem txo tau los ntawm kev siv square magnesia-alumina spinel cib, thiab qee qhov cub kuj tuaj yeem txo tau los ntawm silica fume cib. Qhov no feem ntau yog los ntawm kev xaiv cov ntaub ntawv refractory kom txo tau lub zog ruaj khov ntawm cov ntaub ntawv refractory thiab cov ntaub ntawv kiln, kom cov ntaub ntawv txuas nrog cov khoom siv hluav taws xob yooj yim dua. Txawm li cas los xij, cov cement clinker thiab ntau yam cement kiln refractories yog cov ntaub ntawv silicate. Yog li ntawd, kev siv cov ntaub ntawv refractory tuaj yeem tsuas yog txo qis, tab sis tsis tas yuav tsum zam kev sib txuas ntawm cov khoom siv hauv tsev thiab cov khoom siv kiln.
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