Mataira eAlumina Ceramic asingapfeki uye mashandisirwo awo

Mataira eAlumina ceramic asingapfekizvigadzirwa zveceramic zvinoshanda zvakagadzirwa nealuminium oxide (Al₂O₃) yakachena kwazvo kuburikidza nekudzvanya uye kupisa kwakanyanya. Huremu hwayo hweAl₂O₃ hunowanzova 92%, 95%, kana 99%, ine huwandu hunobva pa3.60 g/cm³ kusvika 3.90 g/cm³ uye mvura inonyudzwa pasi pe0.01%. Zvinhu izvi zvine kuomarara kwakanyanya uye kugadzikana kwakanaka kwemakemikari, zvakakodzera kushandiswa mumaindasitiri ane chekuita nekurova, kukweshana kunotsvedza, uye ngura.

Zvakajairika pakushanda: Kuomarara kweMohs kwe9, kuomarara kweRockwell HRA 85-90, uye kuramba kupfeka ka20-30 kupfuura simbi yakajairwa yekabhoni (kuoma kupera kwehuwandu ≤0.05 cm³ pa ASTM G65 dry sand raber wheel test). Simba rekuchinjika rinosvika 250-350 MPa, kupisa kwemhepo kuri pakati pe25-30 W/(m·K), uye tembiricha yekushanda inotangira pa -50 °C kusvika 1200 °C (zvichienderana negiredhi rakatarwa). Aya data anovimbisa kuvimbika kwenguva refu mumamiriro ekupisa kwakanyanya uye kupisa kwakanyanya.

Chigadzirwa ichi chinoshandiswa zvakanyanya kudzivirira kusakara mumidziyo mikuru muindasitiri yesimende, simbi, magetsi, migodhi, uye marasha, senge mablades eclassifier, chutes, pipe elbows, cyclones, uye hopper linings. Nzira dzekuisa dzinosanganisira epoxy resin bonding, bolting, kana welding (uchishandisa mataira eceramic akacherwa kare akasanganiswa nemaplate erabha/simbi). Ukobvu hwakajairika hunobva pa5 mm kusvika 25 mm; saizi dzakajairika dzemataira dzinosanganisira 10 mm×10 mm, 20 mm×20 mm, uye 50 mm×50 mm square kana hexagonal shapes kuti zvive nyore kucheka nekuronga panzvimbo.

Kushandisa mataira esimbi ealumina asingaparare zvakanyanya kunowedzera hupenyu hwebasa remuchina uye kunoderedza nguva yekushanda kwemuchina. Ruzivo rwemumunda runoratidza kuti mumamiriro ezvinhu akafanana ekushanda, mataira esimbi anogara kwenguva yakareba ka3-8 kupfuura maplate esimbi ane manganese akawanda kana maplate esimbi anodzivirira kupera. Chigadzirwa ichi hachina magineti, hachipindi muacid/alkali corrosion (kunze kwehydrofluoric acid uye hot concentrated alkali), uye hachisvibisi zvinhu. Sarudzo inofanira kuona huwandu hweAl₂O₃ uye ukobvu hwemataira zvichibva pakona chaiyo yeimpact, saizi yezvidimbu, uye tembiricha kuti pave nekuenzana pakati pekushanda uye mutengo.