Cov txheej txheem tsim cov pa roj carbon monoxide yog cov txheej txheem tswj nruj nruj, kev tsim cov graphite electrode, cov khoom siv tshwj xeeb carbon, aluminium carbon, cov khoom siv high-end carbon yog inseparable los ntawm kev siv raw cov ntaub ntawv, khoom siv, technology, kev tswj ntawm plaub yam khoom thiab lwm yam proprietary. tshuab.
Cov khoom siv raw yog cov yam tseem ceeb uas txiav txim siab cov yam ntxwv ntawm cov khoom siv carbon, thiab kev ua haujlwm ntawm cov khoom siv raw txiav txim siab qhov ua tau zoo ntawm cov khoom siv carbon. Rau zus tau tej cov UHP thiab HP graphite electrodes, siab zoo koob coke yog thawj xaiv, tab sis kuj zoo binder asphalt, impregnating neeg sawv cev asphalt. Tab sis tsuas yog cov khoom lag luam zoo, tsis muaj cov cuab yeej siv, thev naus laus zis, kev tswj hwm thiab cov cuab yeej cuab tam muaj feem xyuam, tseem tsis tuaj yeem tsim cov khoom zoo UHP, HP graphite electrode.
Kab lus no tsom mus rau cov yam ntxwv ntawm cov koob zoo coke kom nthuav tawm qee qhov kev xav ntawm tus kheej, rau cov kws tsim cov koob coke, electrode manufacturers, cov koom haum tshawb fawb tshawb fawb los sib tham.
Txawm hais tias kev lag luam ntawm koob coke nyob rau hauv Suav teb yog tom qab tshaj li ntawm cov lag luam txawv teb chaws, nws tau tsim sai heev nyob rau hauv xyoo tas los no thiab tau pib ua zoo. Hais txog tag nrho cov ntim ntau lawm, nws tuaj yeem ua tau raws li qhov xav tau ntawm koob coke rau UHP thiab HP graphite electrodes uas tsim los ntawm cov tuam txhab hauv tsev. Txawm li cas los xij, tseem muaj qhov sib txawv ntawm qhov zoo ntawm koob coke piv nrog cov lag luam txawv teb chaws. Qhov kev hloov pauv ntawm kev ua haujlwm batch cuam tshuam rau qhov kev thov rau cov koob zoo coke hauv kev tsim cov loj loj UHP thiab HP graphite electrode, tshwj xeeb tshaj yog tsis muaj cov koob zoo sib koom ua ke uas tuaj yeem ua tau raws li kev tsim cov graphite electrode.
Cov tuam txhab txawv teb chaws cov tuam txhab tsim cov khoom lag luam loj UHP, HP graphite electrode feem ntau yog thawj qhov kev xaiv ntawm cov roj av koob coke zoo li cov khoom siv tseem ceeb coke, cov tuam txhab Japanese carbon kuj siv qee cov thee series koob coke ua raw khoom, tab sis tsuas yog rau cov hauv qab no φ 600mm specification ntawm graphite electrode ntau lawm. Tam sim no, koob coke nyob rau hauv Suav teb yog tsuas yog thee series koob coke. Kev tsim cov khoom lag luam zoo siab UHP graphite electrode los ntawm cov tuam txhab carbon feem ntau tso siab rau cov roj av series koob coke, tshwj xeeb tshaj yog kev tsim cov khoom siv zoo nrog cov khoom siv Japanese Suishima roj series koob coke thiab British HSP roj series koob coke li raw khoom coke.
Ntawm tam sim no, cov coke koob uas ua los ntawm ntau yam kev lag luam muaj feem cuam tshuam nrog cov ntsiab lus lag luam ntawm. Txawm li cas los xij, tseem tsis tau muaj ntau qib sib txawv ntawm koob coke kev faib tawm piv nrog txawv teb chaws. Yog li ntawd, kev tsim cov koob coke colloquially kuj rau "cov khoom sib koom ua ke", tsis tuaj yeem cuam tshuam cov qib ntawm cov qib zoo hwm koob coke.
Ntxiv nrog rau kev sib piv cov qauv kev ua tau zoo, cov lag luam carbon yuav tsum tau them sai sai rau tus yam ntxwv ntawm koob coke, xws li kev faib tawm ntawm thermal expansion coefficient (CTE), particle zog, anisotropy degree, nthuav cov ntaub ntawv nyob rau hauv lub xeev tsis-inhibited thiab inhibited xeev, thiab qhov kub thiab txias ntawm expansion thiab contraction. Vim tias cov khoom siv thermal ntawm koob coke no tseem ceeb heev rau kev tswj cov txheej txheem graphitization hauv cov txheej txheem ntawm graphite electrode, tau kawg, kev cuam tshuam ntawm thermal zog ntawm asphalt coke tsim tom qab roasting ntawm binder thiab impregnating tus neeg sawv cev asphalt tsis suav nrog.
1. Kev sib piv ntawm anisotropy ntawm koob coke
Ultra siab zog graphite electrode ntau lawm anisotropic degree kev kawm tsom xam yog qhov kwv yees ntawm koob coke raw khoom zoo los yog tsis yog ib qho tseem ceeb tsom xam txoj kev, qhov luaj li cas ntawm cov degree ntawm anisotropy, ntawm chav kawm, kuj muaj ib tug tej yam cuam tshuam rau electrode ntau lawm txheej txheem, qib ntawm anisotropy ntawm hluav taws xob tsis tshua muaj thermal shock kev ua tau zoo tshaj qhov anisotropy degree ntawm lub zog nruab nrab ntawm cov electrode me me yog qhov zoo.
Tam sim no, kev tsim cov thee koob coke hauv Suav teb yog ntau dua li ntawm cov roj rab koob coke. Vim tias cov khoom siv raw khoom siab thiab tus nqi ntawm cov lag luam carbon, nws yog ib qho nyuaj rau siv 100% domestic koob coke nyob rau hauv zus tau tej cov UHP electrode, thaum ntxiv ib feem ntawm calced roj av coke thiab graphite hmoov los tsim electrode. Yog li ntawd, nws yog ib qhov nyuaj rau ntsuam xyuas lub anisotropy ntawm domestic koob coke.
2. Linear thiab volumetric zog ntawm koob coke
Qhov kev hloov pauv ntawm cov kab thiab qhov ntim ntawm cov koob coke feem ntau yog tshwm sim hauv cov txheej txheem graphite uas ua los ntawm electrode. Nrog rau qhov kev hloov ntawm qhov kub thiab txias, koob coke yuav undergo linear thiab volumetric expansion thiab contraction thaum lub sij hawm tus txheej txheem ntawm graphite txheej txheem cua sov, uas ncaj qha cuam tshuam rau linear thiab volumetric hloov ntawm lub electrode roasted billet nyob rau hauv cov txheej txheem graphite. Qhov no tsis yog tib yam rau kev siv cov khoom sib txawv ntawm cov coke nyoos, cov qib sib txawv ntawm cov koob coke hloov pauv. Ntxiv mus, qhov kub thiab txias ntawm cov kab thiab ntim hloov ntawm cov qib sib txawv ntawm koob coke thiab calcined petroleum coke kuj txawv. Tsuas yog los ntawm kev paub txog cov yam ntxwv ntawm cov coke nyoos tuaj yeem peb tswj tau zoo dua thiab ua kom zoo dua cov khoom ntawm graphite tshuaj sib lawv liag. Qhov no tshwj xeeb tshaj yog pom nyob rau hauv cov txheej txheem graphitization.
Linear expansion tshwm sim thawj zaug thaum cov roj koob coke pib kub, tab sis qhov kub ntawm qhov pib ntawm linear contraction feem ntau lags qab qhov siab tshaj plaws calcination kub. Los ntawm 1525 ℃ mus rau 1725 ℃, linear expansion pib, thiab qhov kub ntawm tag nrho cov linear contraction yog nqaim, tsuas yog 200 ℃. Qhov kub thiab txias ntawm tag nrho cov kab sib cog lus ntawm cov tib neeg ncua sij hawm roj av coke yog loj dua li ntawm rab koob coke, thiab cov koob coke coke yog nyob nruab nrab ntawm ob, me ntsis loj dua cov roj koob coke. Cov txiaj ntsig ntawm Osaka Industrial Technology Test Institute hauv Nyij Pooj tau pom tias qhov kev ua haujlwm thermal ntawm coke yog qhov phem dua, qhov ntau dua cov kab shrinkage kub ntau, mus txog 500 ~ 600 ℃ kab shrinkage kub ntau, thiab pib ntawm cov kab shrinkage kub yog tsawg. , ntawm 1150 ~ 1200 ℃ pib tshwm sim kab shrinkage, uas kuj yog cov yam ntxwv ntawm zoo tib yam ncua roj av coke.
Qhov zoo dua cov thermal zog thiab ntau dua qhov anisotropy ntawm koob coke, qhov nqaim ntawm qhov kub thiab txias ntawm linear contraction. Qee cov roj zoo koob coke tsuas yog 100 ~ 150 ℃ linear contraction kub ntau. Nws yog qhov muaj txiaj ntsig zoo rau cov lag luam carbon los coj cov txheej txheem graphitization ntau lawm tom qab nkag siab txog cov yam ntxwv ntawm kev nthuav dav, kev cog lus thiab rov nthuav dav ntawm ntau yam khoom siv raw coke, uas tuaj yeem zam qee yam khoom tsis tsim nyog pov tseg los ntawm kev siv hom kev sim ua ib txwm muaj.
Post lub sij hawm: Oct-08-2021