1. COV KHOOM SIV RAW
Coke (kwv yees li 75-80% ntawm cov ntsiab lus)
Roj av Coke
Petroleum coke yog cov khoom siv raw tseem ceeb tshaj plaws, thiab nws tau tsim nyob rau hauv ntau yam qauv, los ntawm cov koob coke uas tsis muaj zog heev mus rau cov kua coke uas yuav luag tsis muaj zog heev. Cov koob coke uas tsis muaj zog heev, vim nws cov qauv, yog qhov tseem ceeb rau kev tsim cov electrodes ua haujlwm siab siv hauv cov cub hluav taws xob arc, qhov twg xav tau qib siab ntawm hluav taws xob, tshuab thiab thermal load-bearing peev xwm. Petroleum coke yuav luag tsuas yog tsim los ntawm cov txheej txheem coking qeeb, uas yog cov txheej txheem carbonising qeeb ntawm cov roj av nyoos.
Koob coke yog lo lus siv feem ntau rau ib hom coke tshwj xeeb nrog graphitizability siab heev uas yog los ntawm kev sib luag zoo ntawm nws cov qauv txheej turbostratic thiab ib qho duab tshwj xeeb ntawm cov noob.
Cov khoom khi (kwv yees li 20-25% ntawm cov ntsiab lus)
Coal tar pitch
Cov tshuaj khi siv los sib sau ua ke cov khoom khov kho ua ke. Yog li ntawd, lawv lub peev xwm ntub dej siab ua rau cov khoom sib xyaw ua ke zoo li yas rau kev pwm lossis rho tawm tom qab.
Cov roj av thee yog ib qho organic compound thiab muaj cov qauv aromatic sib txawv. Vim nws muaj cov nplhaib benzene hloov pauv thiab condensed ntau, nws twb muaj cov qauv hexagonal lattice ntawm graphite, yog li ua rau muaj cov graphitic domains zoo thaum lub sijhawm graphitisation. Cov roj av yog cov khoom siv zoo tshaj plaws. Nws yog cov khoom seem distillation ntawm cov roj av thee.
2. KEV SIB XYAW THIAB KEV EXTRUSION
Cov coke uas tau muab sib xyaw nrog cov thee tar pitch thiab qee cov khoom ntxiv los ua ib qho nplaum sib xws. Qhov no raug coj mus rau hauv lub tog raj kheej extrusion. Hauv thawj kauj ruam, huab cua yuav tsum tau tshem tawm los ntawm kev nias ua ntej. Tom qab ntawd cov kauj ruam extrusion tiag tiag ua raws li qhov twg cov khoom sib xyaw raug extruded los ua ib lub electrode ntawm lub cheeb thiab ntev xav tau. Txhawm rau kom sib xyaw thiab tshwj xeeb tshaj yog cov txheej txheem extrusion (saib daim duab ntawm sab xis) cov khoom sib xyaw yuav tsum yog viscous. Qhov no yog ua tiav los ntawm kev khaws cia rau qhov kub siab ntawm kwv yees li 120 ° C (nyob ntawm lub suab) thaum lub sijhawm tag nrho cov txheej txheem tsim khoom ntsuab. Daim ntawv yooj yim no nrog cov duab cylindrical hu ua "ntsuab electrode".
3. CI CI
Muaj ob hom cub tawg uas siv tau:
Ntawm no cov pas nrig extruded tau muab tso rau hauv cov hlau tsis xeb cylindrical canisters (saggers). Txhawm rau kom tsis txhob muaj kev hloov pauv ntawm cov electrodes thaum lub sijhawm cua sov, cov saggers kuj tseem muaj cov xuab zeb tiv thaiv. Cov saggers raug thauj khoom rau ntawm cov platforms tsheb ciav hlau (hauv qab tsheb) thiab dov rau hauv cov qhov cub hluav taws xob roj av.
Lub cub tawg nplhaib
Ntawm no cov electrodes raug muab tso rau hauv ib lub qhov pob zeb zais cia hauv qab ntawm chav tsim khoom. Lub qhov no yog ib feem ntawm lub nplhaib system ntawm ntau tshaj 10 chambers. Cov chambers tau txuas ua ke nrog lub tshuab cua kub kom txuag hluav taws xob. Cov voids ntawm cov electrodes kuj tau sau nrog xuab zeb kom tsis txhob deformation. Thaum lub sijhawm ci, qhov twg lub suab yog carbonized, qhov kub yuav tsum tau tswj kom zoo vim tias ntawm qhov kub txog li 800 ° C ib qho roj sai sai tuaj yeem ua rau tawg ntawm lub electrode.
Hauv theem no cov electrodes muaj qhov ceev ntawm 1,55 - 1,60 kg / dm3.
4. KEV NTXUAV
Cov electrodes ci tau impregnated nrog lub suab tshwj xeeb (kua dej ntawm 200 ° C) kom muab lawv qhov ceev ceev, lub zog kho tshuab, thiab kev coj hluav taws xob uas lawv yuav tsum tau tiv taus cov xwm txheej ua haujlwm hnyav hauv cov cub tawg.
5. Rov ua dua ci
Yuav tsum muaj lub voj voog ci thib ob, lossis "rov ua dua," kom ua rau cov suab impregnation carbonize thiab tshem tawm cov volatiles uas tseem tshuav. Qhov kub rov ua dua yuav luag txog 750 ° C. Hauv theem no cov electrodes tuaj yeem ncav cuag qhov ceev ntawm 1,67 - 1,74 kg / dm3.
6. Kev kos duab
Lub cub tawg Acheson
Kauj ruam kawg hauv kev tsim graphite yog kev hloov pauv ntawm cov pa roj carbon uas ci mus rau graphite, hu ua graphitizing. Thaum lub sijhawm ua graphitizing, cov pa roj carbon uas tau txiav txim ua ntej (turbostratic carbon) raug hloov pauv mus rau hauv cov qauv graphite peb-seem.
Cov electrodes raug ntim rau hauv cov cub hluav taws xob uas muaj cov pa roj carbon puag ncig los ua ib lub pob khov. Ib qho hluav taws xob raug hla mus rau hauv lub cub, ua rau qhov kub nce mus txog kwv yees li 3000 ° C. Cov txheej txheem no feem ntau ua tiav los ntawm kev siv ACHESON FURNACE lossis LENGTHWISE FURNACE (LWG).
Nrog rau lub cub tawg Acheson, cov electrodes raug graphitized siv cov txheej txheem batch, thaum nyob rau hauv lub cub tawg LWG tag nrho kem raug graphitized tib lub sijhawm.
7. KEV TSHUAB
Cov graphite electrodes (tom qab txias lawm) raug tshuab kom raug qhov loj thiab qhov kam rau ua. Theem no kuj tseem yuav suav nrog kev tshuab thiab kev sib txuas cov kawg (sockets) ntawm cov electrodes nrog lub graphite pin (nipple) sib txuas system.
Lub sijhawm tshaj tawm: Plaub Hlis-08-2021