Mullite casting e entsoe ka porous mullite aggregate ea boleng bo holimo, e eketsa phofo e ntle le li-additives ho hlohlelletsa li-casting tse hanyetsanang.Boholo ba likaroloana tsa bohlokoa tsa mullite aggregate ke 12mm;Mocheso oa tšebeliso ea nako e telele ke 1350 ℃.Kaho ea mullite ea matla a phahameng a sa jeng refractory castable e thata.Refractory castable e tla tsoakoa ka metsi a hloekileng.Foromo e tšetsoeng ka metsi e tla ba le botsitso le matla a lekaneng.Boholo ba hlobo bo tla nepahala.Deformation e tla thibeloa nakong ea kaho.Litholoana tsa formwork li tla ba thata.
Litlhokahalong tsa kaho ea mullite refractory castable, mehato ea anti sticking e tla nkuoa bakeng sa sebopeho, 'me bokaholimo ba masonry a futhumatsang a amanang le mochini o ka khangoang o tla se kenele metsi.The castable e tla tsoakoa le motsoako o matla.Nako ea ho kopanya le molumo oa metsi o tla lumellana le litaelo tsa kaho.Motsoako, hopper le setshelo sa boima se tla hloekisoa ha ho fetoloa palo ea literei.Ho kopanngoa ha li-castings tse kopantsoeng ho tla phethoa nakong ea 30min kapa ho latela litaelo tsa kaho.Lisebelisoa tse sa tsoa etsoa li ke ke tsa sebelisoa.Motsoako oa katoloso o kopaneng oa refractory ea cast e tla beoa ho latela litlhoko tsa moralo.
Ha ho matla a kantle kapa thothomelo e tla sebelisoa nakong ea pheko.Bula hlobo.Ha ho na formwork e tla jarisoa, 'me matla a thepa ea ho lahla e tla ba joalo hore bokaholimo le likhutlo tsa hlobo e phuthetsoeng li se ke tsa senyeha kapa tsa holofala mme li ka tlosoa.Ka mor'a hore thepa ea ho lahla e fihle ho 70% ea matla a moralo, mokhoa oa ho jara o tla tlosoa.Li-castings tse chesang le tse thata li tla behoa mochesong o boletsoeng pele li mena.Sebaka sa ho tšela lesela le tla se be le peeling, mapetsong, likheo, joalo-joalo.Li-casting tsa refractory tse entsoeng esale pele ha lia lokela ho pakoa sebakeng se bulehileng.Mehato e thibelang pula le ho thibela mongobo e tla nkoa ha ho bokellana sebakeng se bulehileng.
The mullite castable e na le mocheso o phahameng 'me e ka pepeseha ka ho toba lesela la ho sebetsa, ho hlokomela mocheso o phahameng oa ho boloka matla, boima ba yuniti e bobebe le 40 ~ 60% phokotso ea boima ba sebopeho Thermal conductivity e tlaase, porous mullite aggregate, conductivity e tlaase ea mocheso, ts'ebetso e ntle ea ho kenya mocheso. , ho omisa ka potlako, ho khutsufatsa nako ea ho omisa, melemo ea bohlokoa ea moruo.
Mofuta oa binder o entsoeng ka mullite castable o ka boloka ts'ebetso e ntle ea mullite.Sekopanyi ke setlamo se setle ka ho fetisisa, se ka etsang mullite mocheso o itseng.Ha ho nahanoa ka tšebeliso ea li-castable liketsahalong tse sa tšoaneng, mullite e lokela ho thehoa ka mocheso o tlaase ka hohle kamoo ho ka khonehang.Ho hlakile hore gel ea silica ke sekhomaretsi se loketseng.Ha ho nahanoa ka theko e tlase, gel ea silica e sebelisetsoa ho ikamahanya le colloidal suspension, moo Al2O3: SiO2 e lokelang ho ba haufi kapa ho lekana le karolo ea mullite.
Aluminium e na le hydration e ntle le thepa ea tlhaho e thatafatsang.Ts'ebetso ea bokaholimo e phahame haholo, ka hona karolo ea eona ho refractory castable ke ho sebetsana le SiO2phofo ho theha mullite ka mocheso o tlase, kahoo palo e eketsehileng ea Al2O3+SiO2ke setlamo se loketseng.Liphetho li bontša hore li-binders tse peli li ka etsa mullite le ho ba le matla a batang a matle.
Nako ea poso: Oct-24-2022