Ndezvipi zvinosanganiswa mullite zvidhinha?

Izvo zvinongedzo zvinogona kutsanangurwa zvinoenderana neAl2O3 yemukati yakatemwa nemamiriro ekushandiswa. Parizvino, nzira dzakajairika dzekubatanidza dzinosanganisira:

①Synthetic mullite (yakasanganiswa kana yakasanganiswa) yakaunganidzwa + yakagadzirwa mullite poda yakatsetseka;

②Synthetic mullite (sintered kana fused) yakasanganiswa + yakagadzirwa mullite poda yakatsetseka + Al2O3 poda yakanaka + yakakwirira-yakachena yevhu yevhu;

③Synthetic mullite (sintered kana fused) uye yakasanganiswa chena corundum yakaunganidzwa + yakagadzirwa mullite poda yakatsetseka + Al2O3 poda yakanaka + yakakwirira-yakachena ivhu poda. Iyo particle size reshiyo inofanirwa kugadzirirwa zvinoenderana neiyo ingredient musimboti we “huru kumagumo ese uye diki pakati”. Shandisa sulfite pulp tsvina yemvura kana polyaluminium chloride kana polyphosphate semumiririri anosunga. Mushure mekusanganiswa zvakaenzana, inoumbwa pasi pekudzvinyirirwa kukuru uye inopiswa mumoto wekushisa. Kupisa kwekushisa kunotarirwa nezviri muAl2O3 mune refractory brick. Pakati pe1600～1700℃.

Zirconium mullite zvidhinha zvakasanganiswa zvakakandwa zvigadziriso zvakagadzirwa zvemullite uye zirconia. Zirconium mullite yakasanganiswa zvidhinha yakakandwa ine dense crystal chimiro, yakanyanya kupfava tembiricha pasi pemutoro, yakanaka yekudziya kugadzikana, yakakwira mechaniki simba pakamuri tembiricha uye tembiricha yepamusoro, yakanaka kupfeka kuramba, yakanaka yekupisa conductivity, uye yakanakisa kuramba kukukurwa.

Fe2O3 ine kumwe kunyungudika kwakasimba mu mullite uye corundum pakupisa kwepamusoro, ichigadzira mhinduro yakasimba. Kunyungudika kwayo kwakasimba mu corundum kwakakwirira kudarika mullite, uye crystal lattice ye mullite uye corundum inokura nekuda kwekuumbwa kwekugadzirisa kwakasimba. Iyo yekutanga kunyunguduka tembiricha yeFe2O3 yeAl2O3-SiO2 zvinhu zvine chekuita neAl2O3 zvirimo muhurongwa kana chiyero cheAl2O3 / SiO2. Kana Al2O3/SiO2<2.55, tembiricha yekunyungudika iri 1380℃. Kana Al2O3/SiO2>2.55, tembiricha yekunyungudika yekutanga i1380℃. Tembiricha yekunyunguduka inowedzera kusvika 1460 ℃, uye zvishoma nezvishoma inowedzera nekuwedzera kweiyo Al2O3 yemukati. Mumhepo inoderedza, Fe2O3 inoderedzwa kusvika kuFeO uye inoparadza muchikamu chegirazi, uye incipient kunyunguduka kwekushisa kwegadziriro inodonha kusvika 1240 ° C uye 1380 ° C, maererano.

Nekuwedzera kweAl2O3 zvinyorwa muzvidhinha mullite, kushanda kwayo kwekushisa kwepamusoro kunovandudza; nepo huwandu hwe solvent huchiwedzera, kupisa kwakanyanya kwekuita kunoderera. Saizvozvo, kunyatso kudzora zviri mukati metsvina oxides, kunyanya zviri mukati K2O, Na2O uye Fe2O3 chiyero chakakosha chekuwana yakakwirira-kushanda uye yakakwirira-kuchena mullite zvidhinha. Inoshandiswa mu slag kana gasi nharaunda ine alkali components, ine yakakomba corrosive mhedzisiro pa mullite refractory zvidhinha.