magnesia-alumina spinel

Magnesia-alumina spinel (magnesia-alumina spinel) yog hais txog cov khoom siv hluavtaws hluavtaws spinel refractory raw khoom siv magnesium oxide thiab txhuas oxide ua raw khoom. Cov khoom siv raw tsis tshua pom muaj nyob hauv cov xwm txheej, thiab cov khoom lag luam magnesia-aluminium spinel yog tag nrho cov khoom tsim tawm. Bauxite-raws li sintered magnesia-aluminium spinel yog ua los ntawm cov khoom zoo bauxite nrog cov ntsiab lus Al2O3 ntau dua 76% thiab zoo-zoo lub teeb-hlwb magnesia hmoov nrog MgO cov ntsiab lus ntau dua 95%. Sintered ntawm qhov kub siab saum toj no.

Introduction

Bauxite-raws li sintered magnesia-aluminium spinel yog ua los ntawm cov khoom zoo bauxite nrog cov ntsiab lus Al2O3 ntau dua 76% thiab zoo-zoo lub teeb-hlwb magnesia hmoov nrog MgO cov ntsiab lus ntau dua 95%. Sab saum toj kub sintering [1].

Cov yam ntxwv ntawm aluminium-magnesium spinel

Bauxite-raws li sintered magnesia-aluminium spinel yog ua los ntawm cov khoom zoo bauxite nrog cov ntsiab lus Al2O3 ntau dua 76% thiab zoo-zoo lub teeb-hlwb magnesia hmoov nrog MgO cov ntsiab lus ntau dua 95%. Nws yog sintered nyob rau high school kub, uas muaj tej ceev, siab mineral theem cov ntsiab lus, zoo-tsim siv lead ua nplej, niaj hnub qauv thiab ruaj khov zoo. Magnesium-aluminium spinel muaj kev tiv thaiv zoo corrosion, muaj zog corrosion thiab spalling muaj peev xwm, zoo slag kuj, abrasion tsis kam, thermal shock stability, kub tsis kam thiab lwm yam kev ua tau zoo. Nws yog ib qho khoom siv zoo tshaj plaws rau kev tsim cov khoom siv refractory xws li magnesia-aluminium spinel cib rau cov chaw kub kub ntawm cov cement rotary kilns, ladle lining cib, thiab ladle castables. Magnesium-aluminium spinel yog dav siv hauv cov ntaub ntawv refractory, steel smelting, cement rotary kilns thiab iav industrial kilns[2].

Daim ntawv thov ntawm Al-Mg Spinel

Nws muaj zoo corrosion kuj, puas kuj thiab zoo thermal shock stability. Nws txoj kev siv tseem ceeb: Ua ntej, los hloov magnesia chrome xuab zeb los ua magnesia-aluminium spinel cib rau cov cement rotary kilns, uas tsis tsuas yog zam chromium kuab paug, tab sis kuj muaj kev tiv thaiv zoo; thib ob, nws yog siv los ua ladle castables, zoo heev txhim kho corrosion kuj ntawm steel phaj hauv ob sab phlu. Nws yog dav siv nyob rau hauv cov ntaub ntawv refractory rau steelmaking. Kev tsim cov khoom zoo ua ntej-synthetic spinel muab cov ntaub ntawv tshiab rau kev tsim cov khoom tsis zoo thiab zoo li cov purity refractories[2].

daws kev daws teeb meem

Muaj ob hom hluav taws xob melting txoj kev thiab sintering txoj kev. Cov txheej txheem electrofusion synthesis siv cov alumina los yog high-purity bauxite thiab lub teeb-hlwb magnesia (muaj ntuj los yog hiav txwv (brine) dej-borne magnesium) nyob rau hauv feem, thiab yog melted ntawm ib tug kub ntawm txog 2200 ℃ nyob rau hauv ib tug hluav taws xob arc rauv. Txoj kev sintering yog siv cov khoom siv raw li hais saum toj no, tom qab sib tsoo, sib tov, sib tsoo, thiab calcining nyob rau hauv lub teb kiln lossis ncej kiln ntawm qhov kub siab tshaj 1800 ℃. Nyob rau hauv ib co cib, muaj alumina los yog siab Tom qab lub purity bauxite clinker yog hauv av, nws yog ntxiv los yog sib koom ua ke hauv av, sib tov, thiab zoo li tus raws li cov khoom xyaw yuav tsum tau, thiab ces raug rho tawm haujlwm ntawm kub kub los tsim magnesia-aluminium spinel cib, uas yog. feem ntau yog siv nyob rau hauv qhib-hearth rauv saum thiab lwm qhov chaw.