Yiziphi izinhlobo ze- izitini eziphakeme ze-alumina avame ukusetshenziswa eziko zezimboni?

Isitini esiphezulu se-alumina sisho umkhiqizo osikiwe oqukethe ngaphezu kuka-348% i-Al2O aluminosilicate noma i-alumina emsulwa. Ngokuvamile, izitini eziphakeme ze-alumina ziqukethe ngaphansi kuka-80% i-Al2O3, futhi lezo eziqukethe okungaphezu kuka-80% Al2O3 zibizwa ngokuthi izitini ze-corundum. Uma kuqhathaniswa nezitini zobumba, izitini eziphakeme ze-alumina zinezinzuzo ezivelele zokuphikisa okuphezulu nokushisa okuphezulu okuthambisa ngaphansi komthwalo. Ekusetshenzisweni komlilo wezimboni, izitini ezivamile ze-alumina ziwela ezigabeni ezinhlanu ezilandelayo.

(1) Isitini se-alumina esiphezulu esivamile

Ukwakhiwa kwamaminerali okuyinhloko kwesitini yi-mullite, i-corundum nesigaba seglasi. Njengoba okuqukethwe kwe-Al2O3 emkhiqizweni kwanda, i-mullite ne-corundum nayo iyanda, isigaba seglasi sizokwehla ngokufanele, futhi ukusebenza kwe-refractoriness kanye nokushisa okuphezulu komkhiqizo kuzokhula ngokufanele. Izitini ezijwayelekile ze-alumina ezinochungechunge lwezakhiwo ezingcono zokumelana nomlilo kunemikhiqizo yobumba, futhi ziyizinto ezibonakalayo ezinemiphumela emihle yohlelo lokusebenza kanye nohlu olubanzi lokusetshenziswa. Isetshenziswa kabanzi kuma-thermal kilns ahlukahlukene. Uma kuqhathaniswa nemikhiqizo yobumba, impilo yesevisi yeziko ingathuthukiswa.

(2) Isitini esiphezulu se-alumina esithambile somthwalo ophezulu

Uma kuqhathaniswa nezitini ezijwayelekile ze-alumina eziphakeme, izitini ezithambile eziphezulu ze-alumina zihlukile engxenyeni ye-matrix kanye nengxenye ye-binder: ingxenye ye-matrix yengezwa ngokugxila kwamatshe amathathu, futhi ukwakheka kwamakhemikhali ngemva kokudubula kuseduze nokwakheka kwethiyori. i-mullite, eyethulwe ngokunengqondo Sebenzisa izinto ezisezingeni eliphezulu ze-aluminium, njenge-corundum powder, i-high-aluminium corundum powder, njll.; khetha ubumba oluyisiyingi lwekhwalithi ephezulu njenge-ejenti ebophayo, futhi usebenzise ama-ejenti obumbano ahlukene obumba noma ama-ejenti e-mullite bonding kuye ngezinhlobonhlobo. Ngale ndlela engenhla, izinga lokushisa lokuthambisa umthwalo lezitini eziphakeme ze-alumina linganyuswa cishe ngo-50 kuya ku-70°C.

(3) Izitini eziphansi ze-alumina ezisezingeni eliphansi

Thuthukisa ukumelana nokukhasa kwezitini eziphakeme ze-alumina ngokusebenzisa lokho okubizwa ngokuthi ukusabela okungenakulinganisela. Okusho ukuthi, ngokusho kwezinga lokushisa lokusetshenziswa kweziko, engeza amaminerali angamatshe amathathu, i-alumina ecushiwe, njll. ku-matrix ukwenza ukwakheka kwe-matrix kusondele noma i-mullite ngokuphelele, ngoba ukuhlanganiswa kwe-matrix kuzokwandisa nakanjani i-mullite. okuqukethwe kwempahla , Yehlisa okuqukethwe kwesigaba sengilazi, futhi izakhiwo ezinhle kakhulu zomshini nezokushisa ze-mullite zihambisana nokuthuthukiswa kokusebenza kwezinga lokushisa okuphezulu kwempahla. Ukuze wenze i-matrix ibe mullite ngokuphelele, ukulawula i-Al2O3/SiO2 kuwukhiye. Izitini eziphansi ze-alumina ezisezingeni eliphansi zisetshenziswa kakhulu kwizithando zomlilo ezishisayo, eziko eziqhumayo nezinye iziko ezishisayo.

(4) I-Phosphate ibophe isitini esiphezulu se-alumina

Izitini eziphakeme ze-aluminium eziboshwe nge-phosphate zenziwe nge-compact super-grade noma ibanga lokuqala le-high-alumina bauxite clinker njengento eluhlaza eyinhloko, isisombululo se-phosphate noma isisombululo se-aluminium phosphate njengesibophezelo, ngemva kokubunjwa kwe-semi-dry press, ukwelashwa kokushisa ku-400 ~ 600℃ Imikhiqizo ephikisayo eboshwe ngamakhemikhali. Kuyisitini esingashi. Ukuze ugweme ukuncipha okukhulu komkhiqizo ngesikhathi sokusetshenziswa, ngokuvamile kuyadingeka ukwethula izinto zokusetshenziswa ezinwetshwa ukushisa, njenge-kyanite, i-silica, njll., ezithakweni. Uma kuqhathaniswa nezitini eziphakeme ze-alumina eziboshwe nge-ceramic, ukusebenza kwayo kwe-anti-stripping kungcono, kodwa izinga lokushisa layo lokuthambisa umthwalo liphansi, futhi ukumelana kwayo nokugqwala kubi. Ngakho-ke, inani elincane le-corundum ehlanganisiwe, i-mullite, njll. idinga ukwengezwa ukuze kuqiniswe i-matrix. Izitini eziphezulu ze-aluminium eziboshwe nge-phosphate zisetshenziswa kabanzi kumakhilni usimende ojikelezayo, ophahleni lwesithando somlilo kagesi nezinye izingxenye zomlilo.

(5) Isitini se-alumina esinwebekayo esincane

Isitini senziwa ngokuyinhloko nge-high-alumina bauxite njengento eluhlaza eyinhloko, yengezwe ngokugxila kwamatshe amathathu, futhi senziwa ngokuvumelana nenqubo yokukhiqiza izitini eziphezulu ze-alumina. Ukuze ukwandise kahle izitini eziphakeme ze-alumina ngesikhathi sokusetshenziswa, isihluthulelo ukukhetha ukugxila kwamatshe amathathu kanye nosayizi wezinhlayiya zawo, nokulawula izinga lokushisa lokudubula, ukuze ingxenye yamaminerali akhethiwe angamatshe amathathu abe mullite futhi amanye amathathu. -amaminerali amatshe asele. Amaminerali asele angamatshe amathathu aphinde ahlanganiswe (i-mulliteized eyinhloko noma yesibili) ngesikhathi sokusetshenziswa, ehambisana nokukhuliswa komthamo. Amaminerali amatshe amathathu akhethiwe kungcono izinto eziyinhlanganisela. Ngenxa yokuthi izinga lokushisa lokubola lamaminerali amathathu amatshe lihlukile, ukwanda okubangelwa i-mullite petrochemical nakho kuhlukile. Ngokusebenzisa lesi sici, izitini eziphakeme ze-alumina zinomphumela wokunweba ohambisanayo ngenxa yamazinga okushisa ahlukene okusebenza. Ukucindezelwa kwamalunga ezitini kuthuthukisa ukuhlangana okuphelele komzimba we-lining, ngaleyo ndlela kuthuthukise ukumelana nezitini ekungeneni kwe-slag.