Eminyakeni yamuva, ubuchwepheshe ukukhiqizwa ezifuywayoama-graphite crucibleswenze inqubekelaphambili ebonakalayo.Abagcinanga nje ngokubamba ama-crucibles angenisiwe, kodwa kokunye baze badlule kuwo.Ngokusebenzisa amasu okukhiqiza amasha kanye nokuthola izinto zokusetshenziswa zekhwalithi ephezulu, ama-graphite crucibles manje angakwazi ukumelana nezimo ezimbi kakhulu ngokusebenza kahle okungenakuqhathaniswa.
Izici eziyinhloko zalezi zinsimbi ze-graphite crucible ngokungangabazeki kufanele ziphawulwe.Okokuqala, bane-conductivity ephezulu yokushisa, enciphisa kakhulu isikhathi sokuncibilika, ngenxa yokusetshenziswa kwezinto ezingavuthiwe ezifana ne-graphite, ene-conductivity enhle kakhulu yokushisa.Lokhu kwanda kokusebenza kahle akugcini nje ngokusindisa isikhathi namandla, kodwa futhi kwandisa umkhiqizo kuzo zonke izimboni.
Ngaphezu kwalokho, lezi zinsimbi zikwazi ukumelana nokushisa futhi zikwazi ukumelana nezinga lokushisa elifinyelela ku-1200 kuya ku-1600°C.Le khwalithi eyingqayizivele iyenza ilungele izinhlelo zokusebenza ezidinga amazinga okushisa aphezulu, njengokulingisa kwensimbi nama-foundries.Ikhono lokumelana namazinga okushisa anjalo adlulele ngaphandle kokufaka engozini ukusebenza liyinguquko yegeyimu yezinqubo eziningi zezimboni.
Enye yezinto eziphawuleka kakhulu zalezi zinsimbi ze-graphite ukumelana kwazo nokugqwala okuhle kakhulu.Abonisa ukumelana okukhulu ngisho nalapho ebhekene nezinto ezincibilikisiwe ezigqwala kakhulu, eziqinisekisa ukuphila isikhathi eside nokusebenza okuthuthukisiwe.Lokhu kumelana nokugqwala kwandisa ububanzi bokusetshenziswa kwalezi zinsimbi, ikakhulukazi ezimbonini zamakhemikhali nezensimbi.
Ukwengeza, ukumelana nokushaqeka kwayo okushisayo kuyenza ibe ngcono kunemikhiqizo efanayo.I-graphite crucibles ibonisa ukunwebeka ngaphansi kokupholisa okusheshayo nokushisisa imijikelezo, okuyenza ingabi lula ekuqhekekeni nokuphuka.Lokhu kuqina okuphakeme akuthuthukisi ukuphepha kuphela kodwa futhi kunikeza ukonga kwezindleko okubalulekile ngokunciphisa isidingo sokushintshwa njalo.
I-Graphite crucibles isetshenziswa kabanzi ezimbonini ezihlukahlukene ngenxa ye-conductivity yabo enhle kakhulu yokushisa kanye nokumelana nokushisa okuphezulu.Lawa ma-crucible ane-coefficient ephansi yokwanda okushisayo futhi amelana nokushintsha okungazelelwe kwezinga lokushisa.Angakwazi ukumelana nokushisisa nokupholisa okusheshayo ngaphandle kokuhlupheka okukhulu, okuqinisekisa ukusebenza kahle nokwethembeka.
I-graphite crucibles inokumelana nokugqwala okuyisibonelo ezixazululweni ezine-asidi ne-alkaline, okuyenza ibaluleke kumalabhorethri nasezitshalweni zokukhiqiza amakhemikhali.Ukuzinza kwazo okuhle kakhulu ekuphenduleni kwamakhemikhali kubonisa ukuqina kwazo futhi kungaphatha ngokuphepha inhlobonhlobo yamakhemikhali.
Ukwakheka kwe-graphite crucible kuyi-flake yemvelo ye-graphite njengento eyinhloko eluhlaza.Ihlanganiswe ndawonye kusetshenziswa ingcina ekhethekile ebizwa ngokuthi i-plastic fire charcoal.Le nhlanganisela eyingqayizivele iqinisekisa ukuthi ama-graphite crucibles agcina ubuqotho besakhiwo ngaphansi kwezimo ezinzima, enikeza imiphumela engaguquki ezinhlobonhlobo zezicelo.
Ukufika kwezikhiqizo ze-graphite ezikhiqizwa kuleli akubonisi nje impumelelo kwezobuchwepheshe, kodwa futhi kusekela ukuthuthukiswa kwezimboni zendawo.Imikhiqizo ekhiqizwe endaweni, yekhwalithi ephezulu inciphisa ukuthembela ekuthengeni kwamanye amazwe kuyilapho ihlinzeka ngezintengo ezincintisanayo zezinhlobonhlobo zamabhizinisi.Le ntuthuko ivula indlela yokuzimela futhi iqinisa isimo sezimboni zezwe.
Kafushane, ukusungulwa kokukhiqizwa kwe-graphite crucible kwenze kwaba phezulu kakhulu, kwedlula imikhiqizo efanayo evela kwamanye amazwe ngokuya ngokusebenza nokuqina.I-thermal conductivity enhle kakhulu, ukumelana nokushisa okuhle kakhulu, ukumelana nokugqwala kanye nokumelana nokushaqeka okushisayo kwenza kube wusizo ezinhlelweni ezihlukahlukene zezimboni.Ngale ntuthuko, imboni yasekhaya ye-graphite crucible ibe negalelo elikhulu ekukhuleni kwezimboni zezwe kanye nokuzimela.
Isikhathi sokuthumela: Oct-08-2023