Qhov sib txawv tseem ceeb hauv kev coj tus cwj pwm calcination ntawm cov roj-raws li coke thiab cov thee-raws li coke yog nyob rau hauv cov tshuaj tiv thaiv sib txawv uas tsav los ntawm qhov sib txawv hauv lawv cov khoom siv tshuaj lom neeg, uas tom qab ntawd ua rau muaj kev hloov pauv tseem ceeb hauv kev hloov pauv ntawm cov qauv siv lead ua, kev hloov pauv khoom siv lub cev, thiab kev nyuaj tswj cov txheej txheem. Kev tshuaj xyuas ntxaws ntxaws yog raws li nram no:
1. Qhov sib txawv ntawm cov khoom siv tshuaj lom neeg raw khoom tsim lub hauv paus rau kev coj cwj pwm calcination
Cov roj coke yog los ntawm cov roj distillates hnyav xws li cov roj av seem thiab cov roj catalytic cracking clarified. Nws cov tshuaj lom neeg muaj pes tsawg leeg yog tus cwj pwm los ntawm cov saw luv luv, cov polycyclic aromatic hydrocarbons txuas nrog linearly, nrog cov ntsiab lus tsawg ntawm sulfur, nitrogen, oxygen, thiab cov hlau heteroatoms, nrog rau cov khoom tsis huv thiab quinoline-insoluble teeb meem tsawg kawg nkaus. Cov khoom no ua rau muaj cov txheej txheem calcination uas tswj hwm los ntawm pyrolysis reactions, nrog rau txoj kev yooj yim thiab kev tshem tawm cov khoom tsis huv.
Qhov sib piv, cov coke ua los ntawm thee yog tsim los ntawm cov thee tar pitch thiab nws cov distillates, uas muaj cov feem ntau ntawm cov saw ntev thiab cov condensed polycyclic aromatic hydrocarbons, nrog rau cov nqi ntau ntawm sulfur, nitrogen, oxygen heteroatoms, thiab cov khoom tsis huv. Cov khoom sib xyaw ua ke ntawm cov thee ua rau tsis yog tsuas yog pyrolysis reactions tab sis kuj tseem muaj cov tshuaj condensation tseem ceeb thaum lub sijhawm calcination, ua rau muaj txoj hauv kev ua tshuaj ntau dua thiab nyuaj dua hauv kev tshem tawm cov khoom tsis huv.
2. Qhov sib txawv ntawm Kev Hloov Pauv ntawm Cov Qauv Crystal cuam tshuam rau Cov Khoom Siv Khoom
Thaum lub sijhawm calcination, cov pa roj carbon microcrystals hauv cov roj-raws li coke maj mam nce ntxiv hauv txoj kab uas hla (La), qhov siab (Lc), thiab tus lej ntawm cov txheej hauv cov siv lead ua (N). Cov ntsiab lus ntawm cov graphite microcrystals zoo tagnrho (Ig / Iall) kuj nce siab heev. Txawm hais tias Lc muaj kev "hloov pauv" vim yog cov khoom tsis ruaj khov thiab cov coke nyoos shrinkage, tag nrho cov qauv siv lead ua tiav ntau dua, nrog rau qib siab dua ntawm graphitization. Qhov kev hloov pauv ntawm cov qauv no ua rau cov roj-raws li coke nrog cov khoom zoo heev xws li cov coefficient nthuav dav thermal qis, cov hluav taws xob tsis kam qis, thiab cov hluav taws xob siab tom qab calcination, ua rau nws tsim nyog rau kev tsim cov electrodes graphite loj-loj ultra-high-power.
Ib yam li ntawd, cov qauv carbon microcrystal ntawm cov thee-based coke hloov zuj zus nrog kev nce La, Lc, thiab N thaum lub sijhawm calcination. Txawm li cas los xij, vim muaj kev cuam tshuam ntawm cov khoom tsis huv thiab cov tshuaj tiv thaiv condensation hauv cov khoom siv raw, muaj ntau qhov tsis zoo ntawm crystal, thiab qhov nce ntawm cov ntsiab lus graphite microcrystal zoo tagnrho yog txwv. Tsis tas li ntawd, qhov xwm txheej "inflection point" rau Lc yog qhov pom tseeb dua hauv cov thee-based coke, thiab cov khaubncaws sab nraud povtseg tshiab ntxiv qhia txog "stacking faults" nrog cov khaubncaws sab nraud povtseg qub, ua rau muaj kev hloov pauv tseem ceeb hauv interlayer spacing (d002). Cov yam ntxwv ntawm cov qauv no ua rau cov thee-based coefficient qis dua thermal expansion thiab electrical resistivity dua li cov roj-based coke tom qab calcination, tab sis lub zog tsis zoo thiab kev tiv thaiv kev sib txhuam, ua rau nws tsim nyog dua rau kev tsim cov electrodes muaj zog thiab cov electrodes nruab nrab ultra-high-power.
3. Qhov sib txawv ntawm Kev Hloov Pauv Khoom Siv Lub Cev Txiav Txim Siab Thaj Chaw Siv
Thaum lub sijhawm calcination, cov roj coke uas muaj roj av yuav tawm mus tag nrho thiab ua rau lub ntim me me, ua rau muaj qhov ceev tiag tiag (txog li 2.00–2.12 g/cm³) thiab muaj zog dua. Tib lub sijhawm, qhov hluav taws xob conductivity, oxidation tsis kam, thiab kev ruaj khov ntawm cov khoom siv calcined tau txhim kho zoo heev, ua tau raws li cov kev cai ua haujlwm nruj rau cov khoom siv graphite zoo.
Qhov sib piv, cov coke uas ua los ntawm thee muaj kev ntxhov siab hauv zos thaum lub sijhawm tawm ntawm cov khoom tsis huv vim nws cov ntsiab lus tsis huv siab dua, ua rau cov ntim tsis sib npaug thiab qhov nce me dua ntawm qhov ceev tiag tiag. Ntxiv mus, lub zog qis dua thiab kev tiv thaiv kev puas tsuaj tsis zoo ntawm cov coke uas ua los ntawm thee tom qab calcination, nrog rau nws txoj kev nyiam nthuav dav thaum lub sijhawm kub siab graphitization, xav tau kev tswj hwm nruj ntawm qhov kub nce. Cov yam ntxwv no txwv tsis pub siv cov coke uas ua los ntawm thee hauv cov teb siab, txawm hais tias nws cov coefficient nthuav dav thermal qis thiab hluav taws xob resistivity tseem ua rau nws tsis tuaj yeem hloov pauv hauv thaj chaw tshwj xeeb.
4. Qhov sib txawv ntawm Kev Tswj Xyuas Cov Txheej Txheem Cuam Tshuam Rau Kev Ua Haujlwm Zoo
Vim nws cov tshuaj lom neeg yooj yim sib xyaw, cov roj coke ua rau pom tseeb cov tshuaj tiv thaiv thaum lub sijhawm calcination, ua rau muaj kev nyuaj tswj cov txheej txheem qis dua. Los ntawm kev ua kom zoo dua cov kev ntsuas xws li qhov kub thiab txias calcination, qhov kub thiab txias, thiab kev tswj huab cua, qhov zoo thiab kev tsim khoom ntawm cov khoom calcined tuaj yeem txhim kho tau zoo. Tsis tas li ntawd, cov ntsiab lus volatile siab hauv cov roj coke muab lub zog thermal uas tus kheej muab thaum lub sijhawm calcination, txo cov nqi tsim khoom.
Qhov sib txawv, cov tshuaj lom neeg sib xyaw ua ke ntawm cov thee ua rau muaj ntau txoj hauv kev ua haujlwm thaum lub sijhawm calcination, ua rau muaj kev nyuaj rau kev tswj cov txheej txheem. Kev kho cov khoom siv raw ua ntej, kev tswj hwm qhov kub kom raug, thiab kev hloov kho huab cua tshwj xeeb yog qhov yuav tsum tau ua kom ntseeg tau tias cov khoom zoo ruaj khov tom qab calcination. Ntxiv mus, cov thee ua los ntawm coke xav tau kev ntxiv zog thermal ntxiv thaum lub sijhawm calcination, ua rau cov nqi tsim khoom thiab kev siv hluav taws xob ntau ntxiv.
Lub sijhawm tshaj tawm: Plaub Hlis-07-2026