1. Cov khoom siv raw
Coke (kwv yees li 75-80% hauv cov ntsiab lus)
Petroleum Coke
Petroleum coke yog cov khoom siv tseem ceeb tshaj plaws, thiab nws tau tsim nyob rau hauv ntau cov qauv, los ntawm cov koob anisotropic coke mus rau ze li ntawm isotropic kua coke.Lub koob anisotropic coke heev, vim nws cov qauv, yog qhov tsis tseem ceeb rau kev tsim cov khoom siv hluav taws xob zoo siv hauv cov hluav taws xob arc rauv, qhov twg yuav tsum muaj cov khoom siv hluav taws xob, cov khoom siv hluav taws xob thiab thermal load-cov kabmob.Petroleum coke yuav luag tsuas yog tsim los ntawm cov txheej txheem coking qeeb, uas yog cov txheej txheem qis carbonising ntawm cov roj crude distillation residues.
Koob coke yog lub ntsiab lus siv rau ib hom tshwj xeeb ntawm coke nrog cov graphitizability siab heev uas tshwm sim los ntawm ib qho kev xav zoo sib xws ntawm nws cov txheej txheem turbostratic thiab ib lub cev zoo ntawm cov nplej.
Binders (kwv yees li 20-25% hauv cov ntsiab lus)
Coal tar pitch
Cov khoom sib khi yog siv los ua kom cov khoom sib txuas rau ib leeg.Lawv lub peev xwm wetting siab yog li hloov cov khoom sib xyaw rau hauv lub xeev yas rau molding los yog extrusion.
Coal tar pitch yog cov organic compound thiab muaj cov qauv sib txawv.Vim nws cov feem ntau ntawm kev hloov thiab condensed benzene rings, nws twb muaj qhov txawv preformed hexagonal lattice qauv ntawm graphite, yog li yooj yim tsim cov graphitic domains zoo thaum lub sij hawm graphitisation.Pitch ua pov thawj tias yog qhov zoo tshaj plaws binder.Nws yog distillation residue ntawm thee tar.
2. MIXING THIAB EXTRUSion
Lub milled coke yog tov nrog thee tar suab thiab ib co additives los tsim ib tug niaj hnub muab tshuaj txhuam.Qhov no yog coj mus rau hauv lub tog raj kheej extrusion.Hauv thawj kauj ruam, huab cua yuav tsum tau muab tshem tawm los ntawm prepressing.Tshaj li qhov tseeb extrusion kauj ruam raws li qhov sib tov yog extruded los ua ib qho electrode ntawm qhov xav tau txoj kab uas hla thiab ntev.Txhawm rau kom muaj kev sib tov thiab tshwj xeeb tshaj yog cov txheej txheem extrusion (saib daim duab ntawm sab xis) qhov sib tov yuav tsum khov.Qhov no yog ua tiav los ntawm kev khaws cia ntawm qhov kub siab ntawm approx.120 ° C (nyob ntawm lub suab) thaum lub sij hawm tag nrho cov txheej txheem ntsuab ntau lawm.Daim ntawv yooj yim no nrog cov duab cylindrical yog hu ua "ntsuab electrode".
3. QHIA
Ob hom ci rauv yog siv:
Ntawm no cov rods extruded yog muab tso rau hauv cylindrical stainless hlau canisters (saggers).Txhawm rau kom tsis txhob deformation ntawm cov electrodes thaum lub sij hawm cua sov txheej txheem, cov saggers kuj muaj ib tug tiv thaiv npog ntawm xuab zeb.Cov saggers tau thauj khoom ntawm cov tsheb ciav hlau platform (lub tsheb hauv qab) thiab dov rau hauv cov pa roj ntsha - raug rho tawm haujlwm.
Nplhaib rauv
Ntawm no cov electrodes yog muab tso rau hauv ib lub pob zeb covert kab noj hniav nyob rau hauv qab ntawm lub chaw tsim khoom.Cov kab noj hniav no yog ib feem ntawm lub nplhaib uas muaj ntau tshaj 10 chav.Cov chav sib txuas ua ke nrog lub tshuab cua kub kom txuag hluav taws xob.Cov voids ntawm cov electrodes kuj muaj cov xuab zeb kom tsis txhob deformation.Thaum lub sij hawm ci, qhov twg lub suab yog carbonized, qhov kub thiab txias yuav tsum tau ua tib zoo tswj, vim hais tias nyob rau hauv qhov kub txog li 800 ° C ib tug sai gas tsim tuaj yeem ua rau tawg ntawm electrode.
Nyob rau theem no electrodes muaj qhov ceev ntawm 1,55 - 1,60 kg / dm3.
4. IMPREGNATION
Cov khoom ci hluav taws xob yog impregnated nrog lub suab tshwj xeeb (ua kua pitch ntawm 200 °
5. RE-BAKING
Lub voj voog thib ob, lossis "rebake," yuav tsum tau ua kom carbonize lub suab impregnation thiab tshem tawm cov volatiles ntxiv.Rebake kub ncav cuag yuav luag 750 ° C.Nyob rau theem no cov electrodes tuaj yeem ncav cuag qhov ceev ntawm 1,67 - 1,74 kg / dm3.
6. GRAPHITIZATION
Acheson Rauv
Cov kauj ruam kawg hauv kev tsim graphite yog kev hloov pauv ntawm cov pa roj carbon monoxide rau graphite, hu ua graphitizing.Thaum lub sij hawm graphitizing txheej txheem, ntau los yog tsawg pre-ordered carbon (turbostratic carbon) hloov mus rau hauv peb-dimensionally graphite qauv.
Cov electrodes tau ntim rau hauv lub cub hluav taws xob uas nyob ib puag ncig los ntawm cov pa roj carbon monoxide los tsim cov khoom loj.Ib qho hluav taws xob tam sim no dhau los ntawm lub qhov cub, ua kom qhov kub thiab txias txog li 3000 ° C.Cov txheej txheem no feem ntau ua tiav siv ACHESON FURNACE lossis LENGTHWISE FURNACE (LWG).
Nrog rau Acheson rauv lub tshuab hluav taws xob yog graphitized siv cov txheej txheem batch, thaum nyob rau hauv LWG rauv tag nrho kem yog graphitized tib lub sijhawm.
7. MACHINING
Cov graphite electrodes (tom qab txias) yog machined kom meej qhov ntev thiab kam rau ua.Cov theem no kuj tseem muaj xws li machining thiab haum qhov kawg (sockets) ntawm cov electrodes nrog threaded graphite tus pin (txiv mis) koom ua ke.
Post lub sij hawm: Apr-08-2021