Magnesia-aluminium spinel

Magnesia-aluminium spinel (Magnesia-aluminium spinel) amatanthauza zinthu zopangira zitsulo zopangidwa ndi spinel refractory pogwiritsa ntchito magnesium oxide ndi aluminium oxide ngati zipangizo. Zopangira sizipezeka kawirikawiri m’chilengedwe, ndipo mafakitale a magnesia-aluminium spinel onse amapangidwa mwachisawawa. Bauxite-based sintered magnesia-aluminium spinel imapangidwa ndi bauxite yapamwamba kwambiri yokhala ndi Al2O3 yoposa 76% ndi ufa wa magnesia wonyezimira wonyezimira wokhala ndi MgO woposa 95%. Sintered pamwamba pa kutentha kwakukulu.

Introduction

Bauxite-based sintered magnesia-aluminium spinel imapangidwa ndi bauxite yapamwamba kwambiri yokhala ndi Al2O3 yoposa 76% ndi ufa wa magnesia wonyezimira wonyezimira wokhala ndi MgO woposa 95%. Pamwambapa kutentha sintering [1].

Makhalidwe a aluminium-magnesium spinel

Bauxite-based sintered magnesia-aluminium spinel imapangidwa ndi bauxite yapamwamba kwambiri yokhala ndi Al2O3 yoposa 76% ndi ufa wa magnesia wonyezimira wonyezimira wokhala ndi MgO woposa 95%. Imatenthedwa pa kutentha kwakukulu, yokhala ndi kachulukidwe kakang’ono kwambiri, kachulukidwe kakang’ono kamchere wamchere, mbewu za kristalo zopangidwa bwino, kapangidwe ka yunifolomu komanso mtundu wokhazikika. Magnesium-aluminiyamu spinel imakhala ndi kukana kwa dzimbiri, kukhazikika kwamphamvu komanso kuthekera kwapang’onopang’ono, kukana bwino kwa slag, kukana abrasion, kukhazikika kwamphamvu kwamafuta, kukana kutentha kwambiri ndi mawonekedwe ena ogwirira ntchito. Ndizinthu zopangira zopangira zinthu zokanira monga njerwa za magnesia-aluminium spinel zopangira kutentha kwambiri kwa ng’anjo za simenti, njerwa zomangira ladle, ndi ma ladle castables. Magnesium-aluminiyamu spinel imagwiritsidwa ntchito kwambiri muzinthu zowumitsa, kusungunula zitsulo, zowotchera simenti ndi zida zamagalasi zamagalasi [2].

Kugwiritsa ntchito Al-Mg Spinel

Ili ndi kukana bwino kwa dzimbiri, kukana kwa abrasion komanso kukhazikika kwamphamvu kwamafuta. Ntchito zake zazikulu: Choyamba, m’malo mwa mchenga wa magnesia chrome kupanga njerwa za magnesia-aluminium spinel zopangira simenti zozungulira, zomwe sizimangopewa kuipitsidwa kwa chromium, komanso zimakhala ndi kukana bwino kwa spalling; chachiwiri, amagwiritsidwa ntchito popanga ma ladle castables, kuwongolera kwambiri Kukana kwa dzimbiri kwa mbale yachitsulo. Amagwiritsidwa ntchito kwambiri muzinthu zopangira zitsulo. Kupanga kwapamwamba kwambiri kwa pre-synthetic spinel kumapereka zida zatsopano zopangira zopangira zosaoneka bwino komanso zowoneka bwino [2].

kuthetsa kuthetsa

Pali mitundu iwiri ya njira yosungunula magetsi ndi njira yosungunula. Njira ya electrofusion kaphatikizidwe imagwiritsa ntchito aluminiyamu yamafakitale kapena bauxite yoyera kwambiri ndi magnesia woyaka (yokhala ndi magnesiamu yachilengedwe kapena yam’nyanja (brine) yotengedwa ndi madzi) molingana, ndipo imasungunuka pa kutentha kwakukulu pafupifupi 2200 ℃ mung’anjo yamagetsi yamagetsi. Njira yopangira sintering ndikugwiritsa ntchito chiŵerengero cha zinthu zomwe tazitchula pamwambapa, mutatha kugaya, kusakaniza, kupukuta, ndi kupukuta mumoto wozungulira kapena muuni wa shaft pa kutentha pamwamba pa 1800 ℃. Mu njerwa zina, aluminiyamu ya mafakitale kapena apamwamba Pambuyo pa chiyero cha bauxite clinker, amawonjezeredwa kapena ophatikizana pansi, osakanikirana, opangidwa molingana ndi zofunikira zopangira, ndiyeno amawotchedwa pa kutentha kwakukulu kuti apange njerwa za magnesia-aluminium spinel. amagwiritsidwa ntchito kwambiri m’malo otseguka a ng’anjo ndi mbali zina.