Cov txheej txheem tsim cov khoom siv carbon yog ib qho kev tsim kho uas tswj hwm nruj heev, kev tsim cov graphite electrode, cov khoom siv carbon tshwj xeeb, cov khoom siv carbon txhuas, cov khoom siv carbon tshiab siab kawg yog sib cais los ntawm kev siv cov khoom siv raw, cov khoom siv, thev naus laus zis, kev tswj hwm plaub yam khoom tsim tawm thiab cov thev naus laus zis tshwj xeeb.
Cov ntaub ntawv raw yog cov yam tseem ceeb uas txiav txim siab txog cov yam ntxwv tseem ceeb ntawm cov ntaub ntawv carbon, thiab kev ua tau zoo ntawm cov ntaub ntawv raw txiav txim siab txog kev ua tau zoo ntawm cov ntaub ntawv carbon uas tsim tawm. Rau kev tsim cov UHP thiab HP graphite electrodes, cov koob coke zoo yog thawj qhov kev xaiv, tab sis kuj tseem muaj cov asphalt binder zoo, cov neeg sawv cev impregnating asphalt. Tab sis tsuas yog cov ntaub ntawv raw zoo, tsis muaj cov khoom siv, thev naus laus zis, cov yam ntxwv tswj hwm thiab cov thev naus laus zis tshwj xeeb, kuj tsis tuaj yeem tsim cov UHP, HP graphite electrode zoo.
Tsab xov xwm no tsom mus rau cov yam ntxwv ntawm cov koob coke zoo los piav qhia qee qhov kev xav ntawm tus kheej, rau cov chaw tsim khoom koob coke, cov chaw tsim khoom electrode, thiab cov koom haum tshawb fawb los tham txog.
Txawm hais tias kev tsim khoom lag luam ntawm cov koob coke hauv Suav teb lig dua li cov tuam txhab txawv teb chaws, nws tau tsim kho sai sai hauv xyoo tas los no thiab tau pib tsim. Hais txog tag nrho cov khoom tsim tawm, nws tuaj yeem ua tau raws li qhov xav tau ntawm cov koob coke rau UHP thiab HP graphite electrodes tsim los ntawm cov tuam txhab carbon hauv tsev. Txawm li cas los xij, tseem muaj qee qhov sib txawv hauv qhov zoo ntawm cov koob coke piv rau cov tuam txhab txawv teb chaws. Kev hloov pauv ntawm kev ua tau zoo ntawm pawg cuam tshuam rau qhov xav tau cov koob coke zoo hauv kev tsim cov loj UHP thiab HP graphite electrode, tshwj xeeb tshaj yog tsis muaj cov koob coke zoo sib koom ua ke uas tuaj yeem ua tau raws li kev tsim cov graphite electrode sib koom ua ke.
Cov tuam txhab ua lag luam carbon txawv teb chaws uas tsim cov khoom loj UHP, HP graphite electrode feem ntau yog thawj qhov kev xaiv ntawm cov roj av zoo zoo li cov coke tseem ceeb, cov tuam txhab carbon Nyiv kuj siv qee cov thee series needle coke ua cov khoom siv raw, tab sis tsuas yog rau cov lus qhia φ 600 mm hauv qab no ntawm kev tsim cov graphite electrode. Tam sim no, cov koob coke hauv Suav teb feem ntau yog cov koob coke thee. Kev tsim cov khoom zoo UHP graphite electrode loj los ntawm cov tuam txhab carbon feem ntau vam khom cov roj av series koob coke, tshwj xeeb tshaj yog kev tsim cov khoom zoo sib koom ua ke nrog cov khoom xa tuaj ntawm Nyiv Suishima roj series koob coke thiab British HSP roj series koob coke ua cov khoom siv raw coke.
Tam sim no, cov koob coke uas tsim los ntawm ntau lub tuam txhab feem ntau piv rau cov ntsuas kev ua lag luam ntawm cov koob coke txawv teb chaws los ntawm cov ntsuas kev ua tau zoo ib txwm muaj, xws li cov ntsiab lus tshauv, qhov tseeb ceev, cov ntsiab lus sulfur, cov ntsiab lus nitrogen, qhov loj me ntawm cov khoom me me, cov coefficient nthuav dav thermal thiab lwm yam. Txawm li cas los xij, tseem tsis muaj qib sib txawv ntawm kev faib cov koob coke piv rau cov teb chaws txawv teb chaws. Yog li ntawd, kev tsim cov koob coke kuj tseem rau "cov khoom sib koom ua ke", tsis tuaj yeem cuam tshuam qib ntawm cov koob coke zoo tshaj plaws.
Ntxiv rau qhov kev sib piv kev ua tau zoo ib txwm muaj, cov tuam txhab ua lag luam carbon kuj yuav tsum tau them sai sai rau qhov kev piav qhia ntawm cov koob coke, xws li kev faib tawm ntawm cov coefficient thermal expansion (CTE), lub zog ntawm cov khoom me me, qib anisotropy, cov ntaub ntawv nthuav dav hauv lub xeev tsis-inhibited thiab lub xeev inhibited, thiab qhov kub thiab txias ntawm kev nthuav dav thiab kev cog lus. Vim tias cov khoom siv thermal ntawm koob coke no tseem ceeb heev rau kev tswj hwm cov txheej txheem graphitization hauv cov txheej txheem tsim khoom ntawm graphite electrode, tau kawg, qhov cuam tshuam ntawm cov khoom siv thermal ntawm asphalt coke tsim tom qab roasting ntawm binder thiab impregnating agent asphalt tsis raug tshem tawm.
1. Kev sib piv ntawm anisotropy ntawm koob coke
(A) Qauv: φ 500 mm UHP electrode lub cev ntawm Lub Hoobkas carbon hauv tsev;
Cov khoom siv raw koob coke: Nyiv Pooj tshiab Tshuaj LPC-U qib, piv: 100% LPC-U qib; Kev tshuaj xyuas: SGL Griesheim cog; Cov ntsuas kev ua tau zoo tau qhia nyob rau hauv Rooj 1.
(B) Qauv: φ 450 mmHP electrode lub cev ntawm lub Hoobkas carbon hauv tsev; Cov khoom siv raw koob coke: lub Hoobkas roj hauv tsev, piv: 100%; Kev Tshuaj Xyuas: Shandong Bazan Carbon Cog; Cov ntsuas kev ua tau zoo tau qhia hauv Rooj 2.
Raws li pom los ntawm kev sib piv ntawm Rooj 1 thiab Rooj 2, qib lPC-U ntawm koob coke ntawm cov tshuaj ntsuas thee tshiab txhua hnub muaj qhov loj anisotropy ntawm cov khoom thermal, uas qhov anisotropy ntawm CTE tuaj yeem ncav cuag 3.61 ~ 4.55, thiab qhov anisotropy ntawm resistivity kuj loj, ncav cuag 2.06 ~ 2.25. Dhau li ntawm qhov flexural zog ntawm cov roj av hauv tsev koob coke zoo dua li ntawm cov tshuaj tshiab txhua hnub LPC-U qib thee ntsuas koob coke. Tus nqi ntawm anisotropy qis dua li ntawm cov tshuaj tshiab txhua hnub LPC-U thee ntsuas koob coke.
Kev tshuaj xyuas qib anisotropic ntawm cov hluav taws xob graphite electrode uas muaj zog heev yog qhov kev kwv yees ntawm cov khoom siv raw ntawm koob coke lossis tsis yog txoj kev tshuaj xyuas tseem ceeb, qhov loj ntawm qib anisotropy, tau kawg, kuj muaj qee yam cuam tshuam rau cov txheej txheem tsim hluav taws xob, qib anisotropy ntawm hluav taws xob ua tau zoo heev dua li qib anisotropy ntawm lub zog nruab nrab ntawm cov hluav taws xob me me.
Tam sim no, kev tsim cov thee koob coke hauv Suav teb loj dua li ntawm cov roj av koob coke. Vim yog tus nqi raw khoom siab thiab tus nqi ntawm cov tuam txhab carbon, nws nyuaj rau siv 100% hauv tsev koob coke hauv kev tsim cov UHP electrode, thaum ntxiv qee qhov feem ntawm calcted roj av coke thiab graphite hmoov los tsim cov electrode. Yog li ntawd, nws nyuaj rau soj ntsuam qhov anisotropy ntawm cov koob coke hauv tsev.
2. Cov khoom siv linear thiab volumetric ntawm koob coke
Qhov kev hloov pauv ntawm cov koob coke linear thiab volumetric feem ntau yog pom tseeb hauv cov txheej txheem graphite uas tsim los ntawm electrode. Nrog rau qhov hloov pauv ntawm qhov kub thiab txias, cov koob coke yuav dhau los ua linear thiab volumetric nthuav dav thiab contraction thaum lub sijhawm ua kom sov graphite, uas cuam tshuam ncaj qha rau qhov kev hloov pauv linear thiab volumetric ntawm cov electrode roasted billet hauv cov txheej txheem graphite. Qhov no tsis zoo ib yam rau kev siv cov khoom sib txawv ntawm cov coke nyoos, qib sib txawv ntawm kev hloov pauv koob coke. Ntxiv mus, qhov kub thiab txias ntawm kev hloov pauv linear thiab ntim ntawm qib sib txawv ntawm koob coke thiab calcined roj av coke kuj txawv. Tsuas yog los ntawm kev tswj hwm qhov cwj pwm no ntawm cov tshuaj coke nyoos peb tuaj yeem tswj hwm zoo dua thiab ua kom zoo dua ntawm kev tsim cov tshuaj graphite. Qhov no yog qhov pom tseeb tshwj xeeb hauv cov txheej txheem graphitization series.
Rooj 3 qhia txog kev hloov pauv linear thiab ntim thiab qhov kub thiab txias ntawm peb qib ntawm cov roj av koob coke tsim los ntawm Conocophillips hauv UK. Kev nthuav dav linear tshwm sim thawj zaug thaum cov roj koob coke pib kub, tab sis qhov kub thaum pib ntawm kev cog lus linear feem ntau poob qis dua qhov kub siab tshaj plaws calcination. Txij li 1525 ℃ txog 1725 ℃, kev nthuav dav linear pib, thiab qhov kub ntawm tag nrho cov kab cog lus linear yog nqaim, tsuas yog 200 ℃. Qhov kub ntawm tag nrho cov kab cog lus ntawm cov roj av qeeb qeeb coke yog loj dua li ntawm cov koob coke, thiab cov thee koob coke yog nyob nruab nrab ntawm ob, me ntsis loj dua li cov roj koob coke. Cov txiaj ntsig xeem ntawm Osaka Industrial Technology Test Institute hauv Nyiv qhia tau hais tias qhov ua tau zoo thermal ntawm coke phem dua, qhov kub ntawm kab shrinkage ntau dua, txog li 500 ~ 600 ℃ kab shrinkage kub, thiab qhov kub ntawm kab shrinkage pib qis, ntawm 1150 ~ 1200 ℃ pib tshwm sim kab shrinkage, uas kuj yog cov yam ntxwv ntawm cov roj av qeeb qeeb coke.
Qhov zoo dua cov khoom thermal thiab qhov loj dua anisotropy ntawm koob coke, qhov nqaim dua qhov kub ntawm linear contraction. Qee cov roj zoo koob coke tsuas yog 100 ~ 150 ℃ linear contraction kub ntau yam. Nws yog qhov zoo heev rau cov tuam txhab carbon los coj cov txheej txheem graphitization tom qab nkag siab txog cov yam ntxwv ntawm linear expansion, contraction thiab reexpansion ntawm ntau yam raw khoom coke, uas tuaj yeem zam qee cov khoom pov tseg tsis tsim nyog los ntawm kev siv hom kev paub ib txwm muaj.
3 xaus lus
Paub txog ntau yam ntxwv ntawm cov khoom siv raw, xaiv cov khoom siv tsim nyog, kev sib xyaw ua ke zoo ntawm thev naus laus zis, thiab kev tswj hwm kev lag luam yog kev tshawb fawb thiab tsim nyog dua, cov txheej txheem no ntawm tag nrho cov txheej txheem tswj hwm nruj thiab ruaj khov, tuaj yeem hais tias muaj lub hauv paus ntawm kev tsim cov khoom siv hluav taws xob zoo ultra-siab, lub zog siab graphite electrode.
Lub sijhawm tshaj tawm: Lub Kaum Ob Hlis-30-2021