Izitini eziphakeme ze-alumina zokuqhuma kwesithando somlilo

Izitini eziphakeme ze-alumina zezindawo zokuqhumisa zibhekisa emikhiqizweni enqabayo eyenziwe nge-high alumina bauxite clinker enokuqukethwe kwe-Al2O3 okungaphezulu kwama-48% futhi isetshenziselwe ukwakha iziko lokuqhuma. Isithando somlilo siyinsiza eyinhloko yokwenza insimbi, kanti izitini zobumba yizinto zokwakha ulayini ezisetshenziswe ekuqaleni kwesithando somlilo. Kusukela ngawo-1950, ivolumu yamathambo wokuqhuma ikhule yaba sezingeni elikhulu, futhi sekuvame kakhulu izinkulungwane zamakhilomitha ayisishiyagalombili kuya kweziyisishiyagalombili. Ukukhiqiza kukhuphuke ngokushesha. Kodwa-ke, isithando somlilo kanye nokugqwala kwesisu ngokusobala kuthinta ukukhiqizwa kwesithando somlilo seRuo. Inqubo yokukhiqizwa kwezitini eziphakeme ze-alumina nezitini zobumba ezinama-multi-clinker ziyefana. Umehluko ukuthi inani le-clinker ezithako liphezulu.

Izitini ze-Blast furnace high alumina zibhekisa kwimikhiqizo ekhombayo eyenziwe nge-high alumina bauxite clinker enokuqukethwe kwe-Al2O3 okungaphezulu kuka-48% futhi isetshenziselwe ukwakha isithando somlilo.

Isithando somlilo siyinsiza eyinhloko yokwenza insimbi, kanti izitini zobumba yizinto zokwakha ulayini ezisetshenziswe ekuqaleni kwesithando somlilo. Kusukela ngawo-1950, ivolumu yamathambo wokuqhuma ikhule yaba sezingeni elikhulu, futhi sekuvame kakhulu izinkulungwane zamakhilomitha ayisishiyagalombili kuya kweziyisishiyagalombili. Ukukhiqiza kukhuphuke ngokushesha. Kodwa-ke, isithando somlilo kanye nokugqwala kwesisu ngokusobala kuthinta ukukhiqizwa kwesithando somlilo seRuo.

Ubuciko:

Inqubo yokukhiqizwa kwezitini eziphakeme ze-alumina nezitini zobumba ezinama-multi-clinker ziyefana. Umehluko ukuthi inani le-clinker ezithako liphezulu, elingaba phezulu ngama-90-95%. I-clinker idinga ukuhlelwa futhi isuswe ukuze kususwe i-iron ngaphambi kokuchobozwa, futhi izinga lokushisa lokudubula Okuphakeme, njenge-Ⅰ, Ⅱ izitini eziphakeme ze-alumina ngokuvamile ziba yi-1500 ～ 1600 ℃ lapho zidutshulwa kuhhonela lomhubhe.

Umkhuba wokukhiqiza eChina ukhombisile ukuthi ngaphambi kokuchotshozwa, i-high-aluminium clinker ihlelwa ngokuqinile futhi yahlukaniswa, futhi igcinwe emabangeni amathathu. Ukusetshenziswa kwe-bauxite clinker nendlela yokugaya yobumba ehlanganisiwe kungathuthukisa ikhwalithi yomkhiqizo.

ukusebenza:

a. Ukubuyiselwa emuva

Ukuphindwa kwezitini eziphakeme ze-alumina kuphakeme kunezitini zobumba nezitini ezinesi-silica, kufinyelela ku-1750 ~ 1790 ℃, okuyizinto ezisezingeni eliphakeme zokuphikisa.

b. Layisha ukushisa kokuthambisa

Ngenxa yokuthi imikhiqizo ene-alumina ephezulu ine-Al2O3 ephezulu, ukungcola okuncane, kanye nemizimba yeglasi engabumbeki kangako, izinga lokushisa lokuthambisa umthwalo liphakeme kunalelo lezitini zobumba. Kodwa-ke, ngoba amakristalu e-mullite awenzi isakhiwo senethiwekhi, izinga lokushisa lokuthambisa umthwalo alikaphakeme njengalelo lezitini ze-silica.

c. Ukumelana kweSlag

Izitini eziphakeme ze-alumina zine-Al2O3 eningi, esondelene nezinto zokwakha ezingathathi hlangothi, futhi ingamelana nokuguguleka kwe-slag ene-acid ne-alkaline slag. Ngenxa yokufakwa kwe-SiO2, amandla okumelana ne-alkaline slag abuthakathaka kunalawo we-acidic slag.

Inqubo amaphuzu:

Izinto zemvelo ze-bauxite zidinga ukubalwa okuhle nokuhlukaniswa okuqinile. Okuqukethwe kwe-iron oxide ekuhlaziyweni kwamakhemikhali kulawulwa ngaphansi kuka-1.2%, futhi awekho amabala wensimbi agxishiwe noma ama-iron cores avunyelwe. Kudingeka ibanga eliphakeme nokuhlanzeka okuphezulu. Ibunjwe ngomshini wezitini ophakeme kakhulu, ukwakheka kwesitini kuyinto ejwayelekile, futhi akukho mifantu enjenge-net kanye ne-delamination yangaphakathi evunyelwe. Qiniseka ukuthi ukuminyana kwezitini okuphezulu kanye nezinga lokushisa lokushisa alikho ngaphansi kuka-1500 ℃.