Thaum ua haujlwm nrogRefractorters Castables, kom tsim nyog ntawm cov pob qij txha nthuav dav yog qhov tseem ceeb los xyuas kom muaj kev sib tw thiab cov txiaj ntsig ntawm cov refractory ob sab. Cov lus qhia no tau hais txog cov kev txiav txim siab tseem ceeb thiab cov kauj ruam rau kev teeb tsa sib koom ua ke thaum lub sijhawm ua ke.
1. Kev sib zog thiab nthuav dav ntawm Refractory Cementable
During the first heating process, refractory castables will shrink twice in volume when dehydrating at 50℃-200℃and sintering at 900℃-1000℃. Hauv lwm qhov kub thiab txias, cua sov yuav ua rau cov uas ua kom muaj peev xwm nthuav dav. Tom qab thawj cov cua kub, lubastable feem ntau tsis yog ntsws.
Txhawm rau tiv thaiv kev ntxhov siab los ntawm kev hloov pauv ntawm kev hloov pauv ntawm thaj chaw me me nrog kev nthuav dav thiab tso tawm rau hauv qhov chaw nthuav dav thiab cog lus ntawm thaj tsam ntawm txhua qhov chaw nchuav.
2. Kev cuam tshuam ntau ntawm cov pob qij txha nthuav dav
The size of the gap should ensure the free expansion of the castables in each section, and the expansion joints in the right position can also become control joints. In the high temperature section (>600 DEGree), qhov dav ntawm kev nthuav dav sib koom tes yuav tsum tau tswj ntawm 3 ~ 4mm raws li qhov sib tw ntawm cov pob qij txha. Cov pob qij txha nthuav dav thiab cov pob qij txha tswj tau teeb tsa ntawm lub dav hlau txog 200 hli deb ntawm lub tshuab convex, tab sis tsis yog nyob rau hauv convex ces kaum thiab lub khob cookie. Cov kev sib tsoo zoo li cas ntawm cov castables ntawm ob sab ntawm kev nthuav dav thiab sib koom tes yog qhov loj, thiab qhov ntom ntawm cov ntsia hlau tuaj yeem nce ntxiv.
3. Qhov tswj hwm ntawm kev nthuav dav
Qhov dav ntawm kev nthuav dav sib koom ua ke yog cuam tshuam nrog kev ua haujlwm kub thiab qhov ntev ntawm cov kab tswj kev tswj hwm. Thaum qhov ntsuas kub yog siab thiab cov tswj kav ntev yog ntev, kev nthuav dav sib koom ua ke tuaj yeem tsim nyog widened. Hauv cov cheeb tsam uas muaj qhov kub tsis tshua muaj kub (<400℃), the equipment shell can be directly castable without insulation. Under such conditions, inserting 2mm thick cardboard or plastic film every 1.5m can meet the requirements of the expansion space.
4. Qhov tseem ceeb ntawm txoj hauj lwm ntawm kev sib koom ua ke
Thaum txiav txim siab qhov chaw nthuav dav, kev ua kom tsim nyog ntawm kev co cov txheej txheem kev co yuav tsum tau txiav txim siab tib lub sijhawm. Qhov kev co ntawm cov refractory castabertables ntawm ib sab ntawm qhov sib txawv yuav tsum tsis txhob cuam tshuam rau lub ntsej muag uas tau nchuav thiab muaj kuab thiab tau pib ua kom muaj teeb meem. Qhov chaw nyob ntawm expansion sib koom ua ke zam kev ntxhov siab - cov kabmob sib txuas thiab cov ntaub ntawv. Hauv cov cheeb tsam uas muaj cov duab nyuaj, xws li cov ces kaum, convéities yoog raws li lawv cov chaw yuav tsum tau teeb tsa cov ces kaum thiab nkhaus chaw nrog lub vojvoog me me. Thaum ob lub rooj sib tshuam sib tshuam los ua cov concave kaum sab xis, l - zoo li lub ntsej muag nthuav dav yuav tsum tau teeb tsa ntawm concave kaum sab xis.
Cov duab daim duab thib ib yuav tsum qhia qhov chaw thiab qhov loj ntawm cov pob qij txha nthuav dav hauv qhov chaw tseem ceeb. Yog tias qhov ntsuas kub ua haujlwm ntawm cov khoom siv casting ntau dua 1200 degree, ib qho kev nthuav dav ntau dua 3 hli yuav tsum tau teeb tsa, thiab cov ntaub qhwv kab ceramic fiber yuav tsum tau muab tso rau hauv nws.
5. Teeb tswj cov pob qij txha
Txij li thaum tus refractory cast cov khoom siv yuav ua rau tawg vim tias yuav tsum tau teeb tsa txoj kev sib koom ua ke ntawm xyoo 50 Qhov kev teeb tsa ntawm kev tswj cov sib koom ua ke tuaj yeem sau nrog daim ntawv, paraffin los yog nyias ntoo hauv cov nyom uas tau ua ntej. Raws li cov kev mob siab, cov khoom siv yog cov khoom siv ntws tawm. Tom qab cov khoom siv hluav taws no tau hlawv lossis ploj, tswj cov pob qij txha sab laug.
Cov koom ua ke tswj tau yuav tsum tau teeb tsa hauv nruab nrab ntawm cov ntsia hlau uas nyob ib sab ntawm cov ntsia hlau ntawm ob sab yog sib npaug sib npaug. Nws yuav tsum tau teeb tsa ntawm cov chaw khawb av nruam, cov kav dej conical thiab cov chaw tiaj thiab nkhaus uas muaj kev pheej hmoo ntawm shrinkage tsis tuaj yeem tswj tau. Nws yuav tsum tau zam nyob rau hauv ib tug reas uas nthuav dav pob qij txha tsis tuaj yeem tsim, xws li teeb tsa cov pob qij txha me me ntawm cov chaw me me casting thiab conveyx fab.
