Kukho umahluko omkhulu phakathi kwezitena zodongwe kunye izitena alumina eliphezulu, kodwa uphi umahluko?

Izitena zodongwe zine-aluminiyam ye-35% -45%. Yenziwe nge-clinker yodongwe oluqinileyo, oluxutywe kunye neemfuno zobungakanani besuntswana, zenziwe kwaye zomiswe, kwaye zitshiswe kwiqondo lokushisa lika-1300-1400 ° C. Inkqubo yokudubula yezitena zodongwe ikakhulu yinkqubo yokuphelelwa ngamanzi emzimbeni ngokuqhubekayo kunye nokubola kwe-kaolin ukwenza i-mullite crystals. Izitena zodongwe ziyimveliso enqabileyo ene-acidic refractory, enokumelana nokukhukuliseka kwe-acid slag kunye negesi ye-asidi. Izitena zodongwe zineempawu ezintle ze-thermal kwaye ziyamelana nokubanda ngokukhawuleza kunye nokushisa ngokukhawuleza.

Izitena zodongwe

Kuluhlu lweqondo lokushisa lwe-0-1000 ℃, umthamo wezitena zodongwe uya kwanda ngokulinganayo ngokunyuka kweqondo lokushisa. I-curve yokwandisa umgca isondele kumgca ochanekileyo, kwaye isantya sokwandiswa komgca ngu-0.6% -0.7%. Xa iqondo lobushushu lifikelela kwi-1200℃, Xa iqondo lobushushu liqhubeka nokunyuka, umthamo walo uya kuqalisa ukucutheka ukusuka ekwandeni okukhulu. Emva kokuba iqondo lobushushu lesitena sodongwe lidlule kwi-1200 ℃, indawo ephantsi yokunyibilika kwisitena sodongwe iyancibilika ngokuthe ngcembe, kwaye amasuntswana axinzelelene ngokuqinileyo omnye komnye ngenxa yokuxinana komphezulu, okukhokelela ekuncipheni komthamo.

Izitena eziphezulu ze-alumina ezichasayo ziyimveliso ephikisayo kunye nomxholo we-aluminium omkhulu kune-48%. Ukushisa kwe-refractoriness kunye nomthwalo wokunciphisa umthwalo wezitena eziphezulu ze-alumina ziphezulu kunezo zitena zodongwe, kwaye ukuxhathisa kwe-slag corrosion yabo kungcono, kodwa ukuzinza kwabo kwe-thermal akulunganga njengaleyo yezitena zodongwe. Izitena eziphezulu ze-alumina zinezinga eliphezulu, i-porosity ephantsi kunye nokumelana nokunxiba. Kwezinye iintloko zesithando somlilo kunye nezantsi kwesithando somlilo, kungcono ukusebenzisa izitena eziphezulu ze-alumina kwi-masonry; nangona kunjalo, ukuba isitena esithile sodongwe kwi-carbon furnaces, akufanelekanga ukusebenzisa izitena eziphezulu ze-alumina, kuba izitena eziphezulu ze-alumina zilungele ukugoba kwiqondo lokushisa eliphezulu. I-engile ekhohliweyo.

Izitena zealumini ephezulu

Izitena eziphakamileyo ze-alumina zisetyenziselwa ubukhulu becala uphahla lwezitovu eziqhumayo, izitovu ezitshisayo, uphahla lombane, iziko eliqhumayo, iziko lomlilo, kunye neetofu ezijikelezayo. Ukwengeza, izitena alumina eliphezulu Zisetyenziswa ngokubanzi njengezitena ezivulekileyo zokujonga izitena, iiplagi zokugalela iinkqubo, izitena ze-nozzle, njl.njl. Nangona kunjalo, ixabiso lezitena eziphakamileyo ze-alumina liphezulu kunelo lezitena zodongwe, ngoko izitena zodongwe kufuneka zisetyenziswe apho izitena ze-refractory zingahlangabezana neemfuno. .