Sohle Seo U Lokelang ho se Tseba ka Mullite Bricks: Classification & Applications

Selelekela

Liindastering tse nang le mocheso o phahameng-ho tloha ho tšepe ho ea ho tlhahiso ea likhalase-lisebelisoa tsa refractory ke mokokotlo oa ts'ebetso e sireletsehileng le e sebetsang hantle. Har'a tsena,litene tse ngataba hlahelletseng bakeng sa botsitso ba bona bo ikhethang ba mocheso, ho hanyetsa kutu, le matla a mochini. Ho utloisisa likarolo tsa bona le lits'ebetso ho bohlokoa bakeng sa likhoebo tse batlang ho ntlafatsa bophelo ba lisebelisoa le ho fokotsa litšenyehelo tsa ts'ebetso. Sengoliloeng sena se qhekella mefuta ea bohlokoa ea litene tsa mullite le ts'ebeliso ea tsona ea 'nete ea lefats'e, ho u thusa ho etsa liqeto tse nepahetseng bakeng sa litlhoko tsa hau tsa indasteri.

Sehlopha sa litene tsa Mullite

Litene tsa Mullite li arotsoe ho ipapisitsoe le lits'ebetso tsa tlhahiso le likarolo tse ekelitsoeng, e 'ngoe le e' ngoe e etselitsoe litlhoko tse ikhethang tsa indasteri.

1. Sintered Mullite Bricks

E entsoe ka ho kopanya li-alumina tse hloekileng le silika, ho bōpa motsoako, le ho o tšela ka mocheso o ka holimo ho 1600 ° C, litene tsa sintered mullite li ithorisa ka sebopeho se teteaneng le porosity e tlaase (hangata e ka tlase ho 15%). Litšobotsi tsena li ba fa khanyetso e ntle ea ho apara le ho hanyetsa mocheso oa mocheso-e loketseng tikoloho e nang le ho fetoha ha mocheso khafetsa. Litšebeliso tse tloaelehileng li kenyelletsa lirala tsa litofo tsa ceramic, litofo tse chesang tsa sebōpi, le likamore tse tukang tsa boiler.

2. Litene tsa Mullite tse Fused-cast

E hlahisoa ka ho qhibiliha lisebelisoa tse tala (alumina, silica) ka sebōping sa motlakase sa arc (ho feta 2000 ° C) le ho lahlela motsoako o qhibilihisitsoeng ka har'a hlobo, litene tsa mullite tse entsoeng ka fused-cast li na le litekanyetso tse sa hloekang haholo le bohloeki bo phahameng ba kristale. Ho hanyetsa ha bona khoholeho ea lik'hemik'hale (mohlala, likhalase tse entsoeng ka ho qhibilihisoa kapa li-slags) ho ba etsa khetho e phahameng bakeng sa lisebelisoa tse nchafatsang mollo oa khalase, libate tsa litene tsa khalase tse phaphametseng, le lisebelisoa tse ling tse pepesehileng mecheng ea litaba e matla e qhibilihisitsoeng.

3. Litene tsa Mullite tse bobebe

E entsoe ka ho eketsa li-pore-forming agents (mohlala, sawdust, graphite) nakong ea tlhahiso, litene tse bobebe tsa mullite li na le porosity ea 40-60% le boima bo tlaase haholo ho feta mefuta e entsoeng ka sintered kapa fused-cast. Monyetla oa bona o ka sehloohong ke conductivity e tlaase ea mocheso (0.4-1.2 W / (m·K)), e fokotsang tahlehelo ea mocheso. Li sebelisoa haholo e le likarolo tsa ho futhumatsa liontong, liboping le lisebelisoa tsa kalafo ea mocheso, moo boima ba 'mele le matla a matla e leng tsona tse tlang pele.

4. Litene tsa Zircon Mullite

Ka ho kenyelletsa zircon (ZrSiO₄) ka har'a motsoako oa lihlahisoa tse tala, litene tsa zircon mullite li fumana ts'ebetso e ntlafetseng ea mocheso o phahameng-li khona ho mamella mocheso ho fihlela ho 1750 ° C le ho hanela khoholeho ea mobu ho tloha ho slags ea acidic. Sena se li etsa hore li tšoanele libaka tse thata tse kang libopi tse qhibilihisang tšepe tse se nang ferrous (mohlala, lisele tse fokotsang aluminium) le libaka tsa ho chesa sebōpi sa rotary samente.