Thaum twgrefractory castablesyog siv rau hauv ob sab phlu ntawm industrial kilns, lub hauv ob sab phlu qauv yuav deformed thiab nthuav vim lub zog ntawm thermal stress tsim los ntawm kub hloov thiab kub gradients. Yog li ntawd, cov pob qij txha expansion yuav tsum tau teem thaum lub sij hawm tsim kho ntawm refractory bricks thiab castables.
Refractories castables siv cov ntaub ntawv sib txawv, thiab cov coefficients nthuav tawm tom qab cua sov kuj txawv. Qhov loj ntawm kev nthuav dav thaum lub sij hawm masonry yog tsuas yog txiav txim los ntawm cov khoom ntawm cov refractory bricks los yog castables siv thiab kub lawv tiv taus.
1. Daim ntawv ntawm expansion pob qij txha ntawm refractory castables
Cov ntaub ntawv ntawm expansion pob qij txha ntawm castables yeej muab faib ua los ntawm cov pob qij txha thiab tsis yog los ntawm cov pob qij txha
2. Kev teeb tsa ntawm cov pob qij txha expansion
Qhov chaw ntawm expansion pob qij txha ntawm castables feem ntau yog xaiv qhov sib nrug, dav thiab daim ntawv ntawm expansion pob qij txha. Qhov kev ncua deb ntawm cov pob qij txha expansion ntawm lub cub tawg tau sib sau ua ke los ntawm prefabricated qhov chaw thiab lub cub tawg cam rau ntawm qhov chaw yog txawv.
① Rau lub cub tawg tau sib sau ua ke nrog cov khoom siv ua ntej, yog tias lub tshuab hluav taws xob lub cev luv luv, tsis tas yuav tsum tawm cov pob qij txha ntxiv ntawm cov khoom ua ntej, thiab tsuas yog qhov sib txawv uas tsim nyog yuav tsum tau muab tso rau ntawm ob qho kawg ntawm lub qhov cub lub cev; Yog hais tias lub cub tawg yog ntev, ib qho kev sib koom ua ke tuaj yeem sab laug txhua 5 ~ 10m raws li qhov ntev ntawm lub qhov cub lub cev raws li qhov kub thiab txias ntawm txhua ntu ntawm lub cub tawg, thiab cov pob qij txha tau ntim nrog cov hlua khi hlua khi rau hauv av nplaum slurry. tiv thaiv cov pa taws thiab hluav taws los ntawm kev tawm sab nraud ntawm qhov kub thiab nruab nrab hauv qhov cub.
② Rauv lub cev cam khwb cia rau ntawm qhov chaw. Qhov sib nrug thiab qhov dav ntawm cov pob qij txha nthuav dav rau lub tshuab hluav taws xob ntawm cov khoom siv hluav taws xob castables cam khwb cia rau ntawm qhov chaw. Thov xa mus rau Table 1. Cov txiaj ntsig hauv lub rooj siv tau rau cov av nplaum thiab cov alumina castables.
③ Fixation ntawm fillers. Cov ntaub ntawv ntawm cov pob qij txha expansion nyob rau hauv lub castables yuav tsum tau kho nyob rau hauv qhov chaw ua ntej pouring los yog ua tib zoo sau thaum lub sij hawm pouring. Thaum lub block casting yog tsim, cov castables yuav tsum tau muab faib ua ob peb blocks raws li lawv expansion pob qij txha, thiab cov templates yuav tsum tau siv los cais thiab ncuav los ntawm cov expansion pob qij txha, thiab cov sib koom ua ke yuav tsum tau embedded tom qab pib qhov chaw.
④ Tiv thaiv kom tsis txhob txav chaw. Txhawm rau tiv thaiv kev sib koom tes sib koom ua ke los ntawm kev hloov pauv lossis hauv zos refractories castables los ntawm kev nplaum, txheej muab tub lim yuav tsum raug txiav kom raug thiab muab tso rau nruj. Yog tias tsim nyog, cov ntsia hlau tuaj yeem ntsia tau rau hauv castable kom ruaj khov txheej txheej.
⑤ Kev ntsuas cais tawm. Thaum cov txheej muab tub lim tau sib cais nyob rau hauv lub xeev txias thiab nyob rau hauv kev sib cuag nyob rau hauv ib tug kub lub xeev nyob rau hauv kev tsim kho ib puag ncig, uas yog, nws yuav ua ib tug zawv zawg nto, nws yog advisable mus ntxiv ib tug cais txheej los tiv thaiv lub muab tub lim los ntawm kev hloov, tiv thaiv kom txhob lo lo ntxhuav. los yog thaiv qhov kev nthuav dav.
3. Tso cai yuam kev ntawm cov pob qij txha expansion
(1) Qhov kev tso cai yuam kev ntawm ntsug expansion pob qij txha yog tsis ntau tshaj 2 hli ib 'meter' nyob rau hauv qhov siab thiab tsis ntau tshaj 15 hli nyob rau hauv tag nrho qhov siab.
(2) Qhov kev tso cai yuam kev ntawm kab rov tav expansion pob qij txha yog tsis ntau tshaj 2.5 hli ib 'meter' nyob rau hauv kab rov tav thiab tsis ntau tshaj 15 hli nyob rau hauv tag nrho ntev.
(3) Qhov kev tso cai yuam kev ntawm kev nthuav dav pob qij txha ntawm lub chaw nres tsheb fais fab boilers yog 3 ~ 4 hli.
4) Tso cai yuam kev ntawm expansion sib koom dav
General industrial furnaces tso cai yuam kev +2 -1
Hloov ua lwm yam yuam kev +2
Muaj boilers +5 -0
Chaw nres tsheb fais fab boilers +3 -3
5) Txhua hom refractory castables cam khwb cia rau ntawm qhov chaw yuav tsum tau muab cov pob qij txha nthuav dav raws li cov kev xav tau ntawm cov qauv tsim, thiab qhov dav qhov yuam kev yuav tsum yog +3mm thiab yuav tsum tsis pub tsawg dua qhov dav dav.
Thaum tsim lub cub tawg hauv qab, cov pob qij txha ntawm cov pob qij txha refractory los yog castables yuav tsum tau staggered ntawm lub sab sauv thiab sab cib txheej thiab tib txheej ntawm lub cub tawg hauv qab. Thaum tsim cov phab ntsa rauv, cov pob qij txha nthuav dav sab laug ntawm sab hauv thiab sab nrauv thiab nruab nrab ntawm cov khaubncaws sab nraud povtseg sab sauv thiab sab hauv tuaj yeem ua rau staggered. Thaum tsim cov phab ntsa ncig, yuav tsum muaj qhov sib txawv ntawm cov plhaub sab nraud kom them nyiaj rau kev nthuav dav.
Thaum lub sij hawm tsim kho ntawm lub vault, lub expansion pob qij txha ntawm refractory bricks thiab refractory castables yuav tsum tau sab laug ncaj ntawm ob qho tag nrho. Thaum tawm mus, lub longitudinal expansion ntawm lub vault thiab upward expansion ntawm lub cub tawg phab ntsa yuav tsum xav txog. Thaum lub vault ntev ntau dua 5 meters, ntxiv rau kom tawm cov pob qij txha ntawm ob sab, cov pob qij txha yuav tsum tau sab laug nyob rau hauv nruab nrab ntawm lub vault raws li segmentation ntawm lub vault ntev, thiab expansion pob qij txha ntawm staggered vaults yuav tsum tau. sab laug ncaj.
Lub expansion pob qij txha ntawm txhua txheej ntawm ntau txheej vault yuav tsum staggered, thiab cov expansion pob qij txha yuav tsum tau them nrog ib tug txheej ntawm ca cib. Yog hais tias nws yog ib lub vault qhuav ntawm silica bricks, 1-2mm cardboard yuav tsum tau muab tso rau hauv cov hluav taws xob sib txuas ntawm lub vault txhua 3-5 cib los them rau qhov nthuav.
Yog tias lub ru tsev raug tshem tawm siv cov cib refractory los yog castables, cov pob qij txha yuav tsum tau sab laug nyob ib ncig ntawm lub qhov cub.
