Izitini zeMagnesia zinokungaphezu kuka-90% okuqukethwe kwe-magnesium oxide futhi zisebenzisa i-periclase njengesigaba sekristalu esiyinhloko. Izitini zeMagnesite zingahlukaniswa zibe izigaba ezimbili zezitini ezishisiwe zeMagnesia kanye nezitini ze-Chemical Bonded Magnesite Brick. Izitini zeMagnesite zinokusebenza okuhle kakhulu kwamandla omshini okushisa okuphezulu nokuqina kwevolumu. Futhi ingasebenza ekushiseni okuphezulu kwe-1750 ℃, izitini zeMagnesite ziyimikhiqizo efanelekile yokufakwa kwesithando somlilo wengilazi.
Izitini ze-Magnesia zingahlukaniswa zibe izinhlobo ezimbili: isitini se-magnesite esishisiwe kanye nesitini se-magnesite esiboshwe ngamakhemikhali. Izitini ezishisiwe ze-magnesite zenziwe ngezinto ezingavuthiwe ze-periclase, ngemuva kokushiswa ngezinga lokushisa eliphakeme elingu-1550 ~ 1600℃ ngokuchotshozwa, ukuxutshwa, ukuncibilika nokubumba. Imikhiqizo yokuhlanzeka okuphezulu inezinga lokushisa elishisayo elingaphezu kuka-1750 ℃. Isitini se-magnesite esingashisiwe senziwe ngokungeza i-agent yamakhemikhali efanelekile ngokuncibilika, ukubunjwa nokomisa.
Ngenxa yokwakheka kwamakhemikhali ahlukene ezitini ze-magnesia, ezingahlukaniswa zibe izinhlobo ezahlukene, futhi zonke lezi zitini zikhiqizwa ngokufaka i-sintering. Ngokusekelwe ezintweni zokusetshenziswa ezihlukene, izitini ze-magnesia zingahlukaniswa ngezigaba ezilandelayo:
Isitini se-magnesia esijwayelekile: itshe le-sintered magnesite.
Isitini esiqondile se-magnesia: ukuhlanzeka okuphezulu kwe-sintered magnesite.
Isitini se-Forsterite: i-peridotite
Isitini se-Magnesia calcia: i-sintered magnesite equkethe i-calcium ephezulu.
Isitini se-Magnesia silica: itshe eliphakeme le-silicon sintered magnesite.
Isitini se-Magnesia chrome: i-sintered magnesite kanye ne-chrome ore ethile.
Isitini se-Magnesia alumina: itshe le-sintered magnesite kanye ne-Al2O3.
Izinto | Izinhlamvu zePhysical and Chemical | ||||||
M-98 | M-97A | M-97B | M-95A | M-95B | M-97 | M-89 | |
I-MgO % ≥ | 97.5 | 97.0 | 96.5 | 95.0 | 94.5 | 91.0 | 89.0 |
I-SiO2 % ≤ | 1.00 | 1.20 | 1.5 | 2.0 | 2.5 | - | - |
I-CaO %≤ | - | - | - | 2.0 | 2.0 | 3.0 | 3.0 |
I-Porosity ebonakalayo % ≤ | 16 | 16 | 18 | 16 | 18 | 18 | 20 |
Ukuminyana Ngenqwaba g/cm3 ≥ | 3.0 | 3.0 | 2.95 | 2.90 | 2.85 | ||
Amandla Okuchotshozwa Okubandayo I-MPa ≥ | 60 | 60 | 60 | 60 | 50 | ||
0.2Mpa Refractoriness Under Load ℃≥ | 1700 | 1700 | 1650 | 1560 | 1500 | ||
Ushintsho lomugqa ongunaphakade % | 1650℃×2h -0.2~0 | 1650℃×2h -0.3~0 | 1600℃×2h -0.5~0 | 1600℃×2h -0.6~0 |
Izitini ze-Magnesite zilungele zonke izinhlobo zezithando zokushisa eziphakeme, njengeziko le-metallurgical. Ngaphezu kwalokho, izitini ze-magnesia zisetshenziswa kabanzi kwezinye izinto ezishisayo, ezifana ne-hyperthermia tunnel kiln, ulwelwesi lwe-rotary simenti yomlilo, ukushisa phansi kwesithando somlilo kanye nodonga, igumbi lokuvuselela ingilazi yesithando somlilo, phansi kwesithando somlilo kagesi kanye nodonga nokunye.
Umkhiqizi we-RS refractory ungumkhiqizi wezitini we-magnesia ochwepheshe e-China, angakunikeza izitini ze-magnesite ezisezingeni eliphezulu. Uma unesidingo sezitini ze-magnesia, noma unemibuzo ngezitini ze-magnesia mayelana nezinkomba zomzimba namakhemikhali, sicela usithinte mahhala, ukuthengisa kwethu kuzokuthinta ngokushesha ngangokunokwenzeka.