Ukusebenza komkhiqizo:Inamandla okuqina komthamo wokushisa okuphezulu, ukumelana okuhle kakhulu nokushaqeka kokushisa, ukumelana nokuguguleka, ukumelana nokugqwala kwamakhemikhali nezinye izici.
Ukusetshenziswa okuyinhloko:Isetshenziswa kakhulu ezindaweni zokushintsha zama-rotary kiln esimende, ama-bolcomposition furniture, ama-tertiary air ducts, kanye neminye imishini yokushisa edinga ukumelana nokushaqeka kokushisa.
Izici zomkhiqizo:Njengezinto eziyisisekelo embonini yokungaguquguquki, izitini ze-alumina eziphakeme zinezici zokungaguquguquki okuphezulu, izinga lokushisa eliphakeme lokuthambisa umthwalo (cishe u-1500°C), kanye nokumelana okuhle nokuguguleka. Zisetshenziswa kabanzi kumahhavini ezimboni ezimbonini ezahlukahlukene. Kodwa-ke, ngenxa yokuqukethwe okuphezulu kwesigaba se-corundum kwezitini ze-alumina ezivamile eziphakeme, amakristalu esigaba se-corundum emikhiqizweni eshisiwe makhulu, futhi ukuqhekeka nokuqhekeka kuvame ukwenzeka lapho kuhlangatshezwana nezimo zokupholisa okusheshayo nokushisa. Ukuqina kokushaqeka kokushisa ngaphansi kwezimo zokupholisa amanzi ze-1100°C kuphela Kungafinyelela izikhathi ezingu-2-4. Ohlelweni lokukhiqiza usimende, ngenxa yemikhawulo yokushisa okushisayo kanye nezidingo zokusebenza zezinto zokungaguquguquki ukuze zinamathele esikhumbeni sesithando, izitini ze-alumina eziphakeme zingasetshenziswa kuphela endaweni yokuguquka yesithando esijikelezayo, umsila wesithando kanye ne-preheater yesithando sokubola.
Izitini ze-alumina eziphakeme ezivimbela ukuqhekeka yizitini ze-alumina eziphezulu ezinezakhiwo ezivimbela ukuqhekeka ezikhiqizwa ngokusekelwe ku-clinker ye-alumina ephezulu futhi zengezwe nge-ZrO2 noma ezinye izinto. Zingahlukaniswa ngezigaba ezimbili, esinye izitini ze-alumina eziphakeme ezivimbela ukuqhekeka eziqukethe i-ZrO2, kanti esinye Uhlobo lokuqala luyisitini se-alumina esiphezulu esivimbela ukuqhekeka esingenayo i-ZrO2.
Izitini ze-alumina ezilwa nokuqhekeka okuphezulu zingamelana nemithwalo yokushisa ephezulu, azinciphisi ivolumu futhi zibe nokukhula okufanayo, azikhukhuli noma zidilike, zinamandla okushisa aphezulu kakhulu kanye namandla okushisa aphezulu, izinga lokushisa eliphakeme lokuthambisa umthwalo, futhi zibe nokumelana okuhle nokushisa. Zingamelana nomthelela wokushintsha kwezinga lokushisa okungazelelwe noma ukushisa okungalingani, futhi ngeke ziqhekeke noma ziqhekeke. Umehluko phakathi kwezitini ze-alumina ezilwa nokuqhekeka okuphezulu eziqukethe i-ZrO2 kanye nezitini ze-alumina ezilwa nokuqhekeka okuphezulu ngaphandle kwe-ZrO2 usezindleleni zazo ezahlukene zokulwa nokuqhekeka. Izitini ze-alumina ezilwa nokuqhekeka okuphezulu eziqukethe i-ZrO2 zisebenzisa izinto ze-zircon ukuze zisebenzise ukumelana okuhle kokugqwala. I-ZrO2 imelana nokuguguleka kwe-sulfur-chlor-alkali. Ngesikhathi esifanayo, emazingeni okushisa aphezulu, i-SiO2 equkethwe ku-zircon izoguqulwa isigaba sekristalu kusuka ku-cristobalite iye esigabeni se-quartz, okuholela emphumeleni othile wokwanda kwevolumu, ngaleyo ndlela kuncishiswe ingozi yokuvimbela i-sulfur-chlor-alkali. Ngesikhathi esifanayo, ivimbela ukuqhekeka ngesikhathi sezinqubo ezishisayo nezibandayo; Izitini ze-alumina eziphakeme ezilwa nokuqhekeka ezingenayo i-ZrO2 zikhiqizwa ngokungeza i-andalusite ezitini ze-alumina eziphakeme. I-andalusite emkhiqizweni isetshenziselwa ukuhlanganiswa kwesibili kuhhavini wesamente. Ikhiqiza umphumela wokwandiswa okuncane ongenakulungiseka ukuze umkhiqizo unganciphi lapho upholisiwe, uqede ukucindezeleka kokuncipha futhi uvimbele ukuqhekeka kwesakhiwo.
Uma kuqhathaniswa nezitini ze-alumina ezine-alumina ephezulu ezivimbela ukuchitheka ezingenayo i-ZrO2, izitini ze-alumina ezine-alumina ephezulu ezivimbela ukuchitheka ezine-ZrO2 zinokumelana okungcono nokungena nokuguguleka kwezakhi zesulfure, i-chlorine kanye ne-alkali, ngakho-ke zinezakhiwo ezingcono zokulwa nokuqhekeka. Kodwa-ke, ngoba i-ZrO2 iyinto engavamile, iyabiza, ngakho-ke izindleko nentengo ziphakeme.Izitini ze-alumina ezine-alumina ephezulu ezivimbela ukuqhekeka eziqukethe i-ZrO2 zisetshenziswa kuphela endaweni yokuguquka yama-oven ajikelezayo esimende. Izitini ze-alumina ezine-alumina ephezulu ezivimbela ukuqhekeka ezingenayo i-ZrO2 zisetshenziswa kakhulu kuma-oven aqhekeka emigqeni yokukhiqiza usimende.
Isikhathi sokuthunyelwe: Mashi-28-2024
