Inqubo yokukhiqiza i-graphite electrode

Izinto ezingavuthiwe kanye nenqubo yokukhiqiza ye-graphite electrode

I-electrode ye-graphite iyinto ekwazi ukumelana nokushisa okuphezulu kwe-graphite conductive ekhiqizwa yi-petroleum knead, i-coke yenaliti njenge-aggregate kanye nebitumen yamalahle njenge-binder, ekhiqizwa ngochungechunge lwezinqubo ezinjengokuxova, ukubumba, ukuwosa, ukufakwa, i-graphitization kanye nokucutshungulwa komshini. impahla.

I-electrode ye-graphite iyinto ebalulekile yokushisa ephezulu yokushisa yokwenza insimbi kagesi. I-electrode ye-graphite isetshenziselwa ukufaka amandla kagesi esithandweni sikagesi, futhi izinga lokushisa eliphezulu elikhiqizwe i-arc phakathi kokuphela kwe-electrode kanye nokushaja kusetshenziswa njengomthombo wokushisa ukuze kuncibilike inkokhiso yokwenza insimbi. Amanye ama-ore ore ancibilikisa izinto ezifana ne-phosphorus ephuzi, i-silicon yezimboni, nama-abrasives nawo asebenzisa ama-electrode e-graphite njengezinto zokuqhuba. Izakhiwo ezinhle kakhulu nezikhethekile zomzimba namakhemikhali zama-graphite electrode nazo zisetshenziswa kabanzi kweminye imikhakha yezimboni.

Izinto zokusetshenziswa zokukhiqiza ama-electrode e-graphite yi-petroleum coke, inaliti ye-coke kanye ne-coal tar pitch.

I-petroleum coke ingumkhiqizo oqinile ovuthayo otholakala ngokufaka izinsalela zamalahle kanye ne-petroleum pitch. Umbala umnyama futhi une-porous, isici esiyinhloko yikhabhoni, futhi okuqukethwe komlotha kuphansi kakhulu, ngokuvamile ngaphansi kuka-0.5%. I-petroleum coke ingeyesigaba se-carbon graphitized kalula. I-petroleum coke inezinhlobonhlobo zokusetshenziswa ezimbonini zamakhemikhali nezensimbi. Iwumthombo oyinhloko wokukhiqiza imikhiqizo ye-graphite yokwenziwa kanye nemikhiqizo ye-carbon ye-electrolytic aluminium.

I-petroleum coke ingahlukaniswa ngezinhlobo ezimbili: i-coke eluhlaza kanye ne-coke e-calcined ngokusho kwezinga lokushisa lokushisa. I-coke yangaphambili ye-petroleum etholwe ngokubambezeleka kokupheka iqukethe inani elikhulu lama-volatile, futhi amandla omshini aphansi. I-coke e-calcined itholakala ngokubalwa kwe-coke eluhlaza. Iningi lezindawo zokucwenga e-China zikhiqiza i-coke kuphela, futhi imisebenzi yokubala yenziwa ikakhulukazi ezitshalweni zekhabhoni.

I-petroleum coke ingahlukaniswa nge-coke ephezulu yesibabule (equkethe ngaphezu kuka-1.5% isulfure), i-coke yesibabule esimaphakathi (equkethe u-0.5% -1.5% sulphur), kanye ne-coke yesulfure ephansi (equkethe ngaphansi kuka-0.5% isulfure). Ukukhiqizwa kwama-electrode e-graphite neminye imikhiqizo ye-graphite yokwenziwa ngokuvamile kukhiqizwa kusetshenziswa i-coke yesulfure ephansi.

I-needle coke iwuhlobo lwe-coke yekhwalithi ephezulu enokwakheka okusobala kwe-fibrous, i-coefficient ephansi kakhulu yokwandisa okushisayo kanye ne-graphitization elula. Uma i-coke iphukile, ingahlukaniswa ibe yimichilo emincane ngokuya ngokuthungwa (i-aspect ratio ngokuvamile ingaphezulu kuka-1.75). Isakhiwo se-anisotropic fibrous singabonwa ngaphansi kwe-microscope ehlukanisayo, ngakho-ke ibizwa ngokuthi i-coke yenaliti.

I-anisotropy yezakhiwo ze-physico-mechanical ye-needle coke isobala kakhulu. Ine-conductivity enhle kagesi neyokushisa ehambisana nesiqondiso se-eksisi ende yezinhlayiyana, futhi i-coefficient yokwanda okushisayo iphansi. Lapho i-extrusion ibunjwa, i-eksisi ende yezinhlayiya eziningi ihlelwe ngendlela ye-extrusion. Ngakho-ke, inaliti ye-coke iwukhiye wezinto ezingavuthiwe zokukhiqiza amandla aphezulu noma ama-electrode e-graphite aphezulu kakhulu. I-electrode ye-graphite ekhiqizwayo ine-resistivity ephansi, i-coefficient encane yokwandisa ukushisa nokumelana nokushaqeka okuhle kokushisa.

I-needle coke ihlukaniswe nge-coke yenaliti esekwe kuwoyela ekhiqizwe kuzinsalela ze-petroleum kanye ne-coke yenaliti esekwe emalahleni ekhiqizwe ngezinto zokusetshenziswa zamalahle ezicolisisiwe.

Itiyela lamalahle ngomunye wemikhiqizo eyinhloko yokucubungula okujulile kwetiyela lamalahle. Kuyingxube yama-hydrocarbon ahlukahlukene, amnyama ekushiseni okuphezulu, okuqinile kancane noma okuqinile ekushiseni okuphezulu, akukho ndawo encibilikayo engaguquki, ethambile ngemva kokushisa, bese iyancibilika, ngobuningi buka-1.25-1.35 g/cm3. Ngokwephuzu layo lokuthambisa, lihlukaniswe izinga lokushisa eliphansi, izinga lokushisa eliphakathi nendawo kanye ne-asphalt yokushisa ephezulu. Izinga lokushisa eliphakathi nendawo elikhiqiza itiyela lingama-54-56% wetiyela lamalahle. Ukwakheka kwetiyela yamalahle kuyinkimbinkimbi kakhulu, ehlobene nezakhiwo zetiyela yamalahle kanye nokuqukethwe kwama-heteroatoms, futhi kuthinteka ohlelweni lwenqubo yokupheka kanye nezimo zokucubungula itiyela yamalahle. Ziningi izinkomba zokubeka uphawu lwethayela lamalahle, njengephuzu lokuthambisa itiyela, i-toluene insolubles (TI), i-quinoline insolubles (QI), amanani e-coking, kanye ne-rheology ye-coal pitch rheology.

Itiyela lamalahle lisetshenziswa njengesibopho futhi lingakhuleli embonini yekhabhoni, futhi ukusebenza kwalo kunomthelela omkhulu enqubweni yokukhiqiza kanye nekhwalithi yomkhiqizo wemikhiqizo yekhabhoni. I-binder asphalt ngokuvamile isebenzisa itiyela eguquliwe enezinga lokushisa eliphakathi nendawo noma izinga lokushisa eliphakathi elinendawo yokuthambisa emaphakathi, inani eliphezulu lokukhokhwa, kanye ne-β resin ephezulu. I-ejenti yokumithisa izinga lokushisa eliphakathi nendawo elinephuzu eliphansi lokuthambisa, i-QI ephansi, kanye nezakhiwo ezinhle ze-rheological.