Magnesia bricks feem ntau suav nrog zoo tib yam, nruab nrab-ntau, siab-purity, fused cib. Ordinary raug rho tawm haujlwm magnesia bricks, feem ntau hu ua burnt magnesia bricks, yog alkaline cib nrog ntau lawm thiab kev siv. kuv lub teb chaws magnesite yog cov zoo zoo thiab muaj ntau reserves, thiab magnesium bricks yog cov zoo thiab tsis tshua muaj nqi, thiab txaus siab rau lub koob npe nrov nyob rau hauv domestic thiab txawv teb chaws kev lag luam.
Cov yam ntxwv thiab kev ntsuas kev ua haujlwm
Lub microstructure ntawm magnesium cib yog qhov ua ke ntawm magnesia microstructure. Magnesia cib ua los ntawm magnesia muaj qhov yooj yim tshaj plaws microstructure, tab sis cov matrix ib feem yog xoob thiab muaj ntau qhov pores. Lub microstructure ntawm magnesium cib ua los ntawm cov qib sib txawv ntawm magnesia yog qhov sib txawv. Ua los ntawm magnesia nrog cov ntsiab lus siab impurity muaj ntau theem silicate, MgO siv lead ua yog puag ncig, thiab tus nqi sib txuas ncaj qha yog tsawg; Cov khoom siv raw muaj cov ntsiab lus impurity tsawg, thiab cib raug rho tawm haujlwm ntawm ultra-siab kub muaj tsawg silicate thiab yog ncaj qha sib txuas Nyob rau hauv lub magnesia cib nrog ib tug siab MgO loj feem ntawm ntau tshaj 98 feem pua, lub MgO siv lead ua yog euhedral los yog semi-hedral. Txawm li cas los xij, nws qhia qhov sib txawv ntawm cov txiaj ntsig ntawm cov khoom siv hluav taws xob kub siab. Piv txwv li, lub softening kub ntawm seawater magnesium bricks nyob rau hauv load yog siab tshaj 1700 degree, thiab feem ntau sintered no bricks yog 1500 mus rau 1600 degree.
1. Ordinary magnesia cib
Cov magnesia siv los tsim cov cib no feem ntau suav nrog ntuj magnesia thiab seawater magnesia. Feem coob ntawm cov cib no hauv kuv lub teb chaws yog ua los ntawm cov qub. Qhov loj feem ntawm MgO hauv magnesia yog nyob nruab nrab ntawm 89 feem pua thiab 98 feem pua. Qhov txwv particle loj feem ntau yog 3-5mm.
Cov yam ntxwv ntawm microstructure zoo tib yam calcined magnesia bricks yog ua los ntawm 91 sintered magnesia thiab 97 high-purity magnesia particles li aggregates, thiab high-purity magnesia li hmoov zoo. Lub pore loj yog loj, lub ntsiab siv lead ua theem yog periclase, thiab cementation ntawm silicate theem yog lub ntsiab tivthaiv nyob rau hauv cib.
2.Ntau yam magnesia cib
Cov yam ntxwv ntawm microstructural ntawm mid-grade magnesia bricks yog qhov yooj yim .Txawm li cas los xij, qhov ntom ntawm lub cib lub cev yog qhov tsawg thiab cov porosity siab, uas yog vim muaj cov ntsiab lus me me ntawm silicate theem nyob rau hauv nruab nrab qib magnesia, uas ua rau muaj kev cuam tshuam loj heev. tsawg degree ntawm cementation.
Qhov ntom ntom thiab compressive lub zog ntawm Mid-qib Magnesium cib yog qis dua li cov dog dig hlawv cov xim hlau nplaum magnesium. Obviously, nws yog unscientific los txiav txim siab kub ua hauj lwm ntawm cov khoom tsuas yog los ntawm lawv tej ceev thiab compressive zog ntawm chav tsev kub.
3.High purity magnesia cib
Cov yam ntxwv microstructural ntawm high-purity magnesia bricks yog qhov yooj yim, zoo ib yam li cov high-purity magnesia. Txawm li cas los xij, qhov matrix yog qhov xoob, thiab qhov porosity kuj siab.
The microstructure and morphology of the high-purity brick, the overall structure of the sample is loose, and the porosity is high. Unlike the mid-grade brick, the content of closed pores in the brick is relatively high. The matrix part has higher porosity and lower degree of cementation. It can be seen that the higher the purity of magnesia, the lower the content of silicate phase, the more difficult to sinter, and the higher the required sintering temperature.
4.Fused magnesia cib
Siv fused magnesia ua raw khoom, nws yog lub hauv paus ntawm fused magnesia cib. Cov yam ntxwv ntawm microstructure ntawm fused magnesium cib yog qhov zoo ib yam li cov fused magnesia. Cov degree ntawm ncaj ncaj yog qhov siab, yog li lub cib muaj siab thiab kev ua kom sov siab dua yog qhov zoo dua li ntawm cov khoom siv hluav taws xob magnesium. Qhov tsis zoo yog qhov tsis zoo thermal shock stability.
Cov yam ntxwv microstructure ntawm cov cib no yog qhov yooj yim, uas nyob ze rau 98 fused magnesia. Lub matrix yog xoob thiab lub porosity loj dua. Cov yam ntxwv ntawm microstructure ntawm 98 fused magnesia, cov qauv ntawm kev sib sau thiab matrix yog qhov sib txawv, qhov saum npoo ntawm cov aggregate yog du thiab cov degree ntawm ntom yog siab; qhov matrix yog xoob thiab qhov pores loj. Ib nrab morphology ntawm matrix ntawm fused magnesium bricks thiab porosity siab dua nyob rau hauv lub matrix yog vim lub siab purity ntawm fused magnesia thiab tsawg impurity cov ntsiab lus, uas ua rau nws nyuaj rau sinter.
