1. ZVINHU Mbishi
Coke (inenge 75-80% mune zvemukati)
Petroleum Coke
Petroleum coke ndiyo inonyanya kukosha, uye inoumbwa mune dzakasiyana siyana zvimiro, kubva kune yakanyanya anisotropic tsono coke kusvika kunenge isotropic fluid coke.Iyo yakanyanya anisotropic tsono coke, nekuda kwechimiro chayo, yakakosha pakugadzirwa kweyepamusoro-inoshanda maelectrode anoshandiswa mumagetsi arc furnaces, uko kunodiwa yakakwira dhigirii remagetsi, mechini uye yekupisa inotakura mutoro.Petroleum coke inenge yangogadzirwa chete nekunonoka kubikira, inova nzira yakapfava inononoka ye carbonising yemasara emafuta asina kukora.
Tsono coke ndiro izwi rinowanzo shandiswa kune yakakosha mhando yekoki ine yakanyanyisa graphitibility zvichibva kune yakasimba inodiwa inofananidzwa yeyayo turbostratic layer chimiro uye imwe chimiro chemuviri chezviyo.
Binders (inenge 20-25% mune zviri mukati)
Marasha etara
Binding agents anoshandiswa kuita agglomerate zvimedu zvakasimba kune mumwe nemumwe.Kukwanisa kwavo kunyorova kwepamusoro saka kunoshandura musanganiswa kuita purasitiki inozotevera kuumba kana extrusion.
Coal tar pitch isanganiswa ine organic uye ine yakasarudzika inonhuhwirira chimiro.Nekuda kwehuwandu hwayo hwemhete dzebenzene dzakatsiviwa uye dzakapfupikiswa, yatove neyakafanofambwa yehexagonal lattice chimiro chegraphite, nokudaro kufambisa kuumbwa kweakanyatso kurongeka graphiti domains panguva yegraphitisation.Pitch inoratidza kuti ndiyo inonyanya kubatsira.Ndiko kusara kwe distillation yetara yemarasha.
2. KUCHENGA UYE EXTRUSION
Iyo coke yakagayiwa inosanganiswa nemarasha tar pitch uye zvimwe zvinowedzera kugadzira yunifomu paste.Izvi zvinounzwa muextrusion cylinder.Mudanho rekutanga mweya unofanirwa kubviswa neprepressing.Kupfuura chaiyo extrusion danho rinotevera apo musanganiswa ari extruded kuumba electrode anodiwa dhayamita uye kureba.Kugonesa kusanganisa uye kunyanya iyo extrusion process (ona mufananidzo uri kurudyi) musanganiswa unofanirwa kuve viscous.Izvi zvinowanikwa nekuichengeta pane tembiricha yakakwira yeapprox.120 ° C (zvichienderana nepitch) panguva yese yekugadzirwa kwegirinhi.Iyi fomu yakakosha ine cylindrical shape inozivikanwa se "green electrode".
3. KUBHEKA
Mhando mbiri dzevira dzekubikira dziri kushandiswa:
Pano matanda akawedzerwa anoiswa mu cylindrical Stainless steel canisters (saggers).Kuti udzivise deformation ye electrodes panguva yekupisa, saggers inozadzwawo nekudzivirira kuvhara kwejecha.Iwo masagi anotakurwa pamapuratifomu echitima (mota dzepasi) uye akakungurutswa mugasi rechisikigo - honi dzinopisa.
Choto chemhete
Pano ma electrode anoiswa mugomba rakavharika rebwe muzasi mehoro yekugadzira.Iyi mhango chikamu chemhete system yemakamuri anopfuura gumi.Iwo makamuri akabatanidzwa pamwe chete nemhepo inopisa yekutenderera system kuchengetedza simba.Iyo voids pakati pe electrode zvakare izere nejecha kudzivirira deformation.Panguva yekubikira, apo mbiru inoiswa carbonized, tembiricha inofanirwa kudzorwa zvine hungwaru nekuti patembiricha inosvika 800 ° C kukurumidza kuumbwa kwegasi kunogona kukonzera kutsemuka kwe electrode.
Muchikamu ichi maelectrodes ane density yakapoteredza 1,55 - 1,60 kg/dm3.
4. KUPIRWA MIMBA
Maelectrode akabikwa anopinzwa nepitch yakakosha (liquid pitch at 200°C) kuti avape hurefu hwepamusoro, simba remagetsi, uye kufambiswa kwemagetsi zvavachada kuti vamire nemamiriro akasimba ekushanda mukati mevira.
5. KUBHEKA PATSVA
Yechipiri yekubikira kutenderera, kana "kubikisa," inodiwa kuti carbonize iyo pitch impregnation uye kudzinga chero yasara inoshanduka.Dzorera tembiricha inosvika 750°C.Muchikamu ichi maelectrodes anogona kusvika kune density yakatenderedza 1,67 - 1,74 kg/dm3.
6. GRAPHITIZATION
Acheson Furnace
Danho rekupedzisira mukugadzirwa kwegraphite kushandurwa kwekabhoni yakabikwa kuita graphite, inonzi graphitizing.Munguva ye graphitizing process, iyo yakawanda kana yakaderera pre-yakaodha kabhoni (turbostratic kabhoni) inoshandurwa kuita matatu-dimensionally yakarongedzerwa graphite chimiro.
Maelectrodes akazara muvira remagetsi akakomberedzwa nekabhoni particles kuita hurema hwakasimba.Magetsi anopfuudzwa nemuchoto, achikwidza tembiricha kusvika pa3000°C.Maitiro aya anowanzo kuwanikwa uchishandisa angave ACHESON FURNACE kana LENGTHWISE FURNACE (LWG).
Nechoto cheAcheson maelectrodes ari graphitized achishandisa batch process, nepo muchoto cheLWG iyo mbiru yese iri graphitized panguva imwe chete.
7. MACHINING
Iyo graphite electrodes (mushure mekutonhora) inogadzirwa kuti ienderane zviyero uye kushivirira.Iyi nhanho inogonawo kusanganisira kugadzira uye kuisa magumo (zvigadziko) zvemagetsi ane threaded graphite pin (nipple) yekubatanidza system.
Nguva yekutumira: Kubvumbi-08-2021