Ukusebenza okuyinhloko kwe isitini se-magnesia

a. Ukubuyiselwa emuva

Ngenxa yokuthi indawo yokuncibilika yamakristalu e-periclase (MgO) iphezulu kakhulu, ifinyelela ku-2800℃, ukunganaki kwezitini ze-magnesia kuphakeme kakhulu phakathi kwezitini ezivamile eziphikisayo, ngokuvamile ezingaphezu kuka-2000℃.

b. Amandla esakhiwo sokushisa okuphezulu

Amandla okushisa aphezulu ezitini ze-magnesia awalungile, futhi izinga lokushisa lokuqala lokuthambisa ngaphansi komthwalo liphakathi kuka-1500 no-1550 ° C, okungaphezu kuka-500 ° C ngaphansi kwe-refractoriness.

c. Ukumelana kweSlag

Izitini ze-Magnesium ziyizinto eziphikisayo ze-alkaline futhi zinokumelana okuqinile ne-alkaline slag njenge-CaO ne-FeO. Ngakho-ke, zivame ukusetshenziswa njengezinto zokwakhiwa kweziko lokuncibilikisa i-alkaline, kodwa ukumelana kwazo ne-acid slag kubi kakhulu. Izitini ze-Magnesium azikwazi ukuthintana nezinto ezine-acidic refractory, zizosabelana ngokwamakhemikhali bese zigqwala ngaphezu kuka-1500 ° C. Ngakho-ke, izitini ze-magnesia azikwazi ukuxutshwa nezitini ze-silica.

d. Ukuzinza okushisayo

Ukuzinza okushisayo kwezitini ze-magnesia kubi kakhulu, futhi kungakwazi ukumelana nokupholisa kwamanzi izikhathi ezi-2 kuya kweziyi-8, okuwububi bayo obukhulu.

e. Ukuzinza kwevolumu

I-thermal expansion coefficient yesitini se-magnesia inkulu, i-coefficient yomugqa yokunweba phakathi kuka-20~1500℃ ingu-14.3×106, ngakho-ke amalunga okukhulisa anele kufanele ashiywe phakathi nenqubo yokwenza izitini.

f. I-Thermal conductivity

I-thermal conductivity yezitini ze-magnesia izikhathi eziningana kunezitini zobumba. Ngakho-ke, ungqimba lwangaphandle lwesithando somlilo olwakhiwe ngezitini ze-magnesia kufanele ngokuvamile lube nongqimba olwanele lokuvikela ukushisa ukuze kuncishiswe ukulahlekelwa ukushisa. Kodwa-ke, i-thermal conductivity yezitini ze-magnesia iyancipha ngokukhuphuka kwezinga lokushisa.

g. Ukufakwa kwamanzi

I-magnesium oxide engabaliwe ngokwanele isabela emanzini ukuze ikhiqize ukusabela okulandelayo: MgO+H2O→Mg(OH)2

Lokhu kubizwa ngokuthi i-hydration reaction. Ngenxa yalokhu kusabela, umthamo ukhula ube ngu-77.7%, okwenza umonakalo omkhulu esitini se-magnesia, okubangela ukuqhekeka noma ama-avalanche. Isitini se-magnesia kufanele sivikelwe kumswakama ngesikhathi sokugcinwa.