Hluav taws xob resistivity txiav txim siab npaum li cas ntawm lub hwj chim koj xa mus ua cua sov hauv lub electrode es tsis txhob kub nyob rau hauv lub arc. Ntawm RP txwv ntawm 8.0 μΩ·m thiab qhov ceev tam sim no ntawm 17 A / cm², 500mm kem hloov txog 45 kW rau hauv tshav kub hauv txhua qhov 'meter' ntawm nws qhov ntev.
Dab tsi yog qhov hluav taws xob resistivity ntsuas hauv RP electrode?
Graphite electrode hluav taws xob resistivity yog qhov tsis kam ntawm lub cev mus rau tam sim no ntws, qhia nyob rau hauv μΩ·m yog li daim duab tsis nyob ntawm seb qhov luaj li cas ntawm qhov chaw kuaj machined. Nws yog ntsuas rau ASTM C611, thiab cov txheej txheem tseem ceeb vim tias tus lej tsuas yog sib piv thaum cov qauv geometry thiab kev sib cuag tau paub.
Rau RP graphite electrode tus ua hauj lwm daim duab yog ib tug raug specification ntawm los yog qis dua 8.0 μΩ·m, tsis yog ib tug ntsuas batch nqi. HP zaum ntawm lossis qis dua 6.5 μΩ·m ntawm tib lub hauv paus, thiab 250mm UHP specification yog tib yam 6.5 μΩ·m txwv. Qhov sib txawv ntawm RP thiab HP yog me me nyob rau hauv cov ntsiab lus kiag li thiab loj nyob rau hauv lub txim, uas yog dab tsi buyers feem ntau nco thaum lawv nyeem ib tug hais.
Kev tiv thaiv tsis yog qhov qhab nia zoo. Nws yog tus nqi hloov pauv: txhua micro-ohm-meter yuav siv lub zog rau lub arc thiab tso nws raws li cua sov hauv kem, raws li qhov ntev ntawm qhov tam sim no dhau mus. Ib qho RP electrode tsis raug hais kom ua raws li UHP, vim tias RP lub luag haujlwm khiav ntawm qhov qis tam sim no thiab lub zog ruaj khov. Nws raug hais kom nyob hauv nws pawg, vim hais tias lub band yog dab tsi lub cub tawg tau tsim nyob ib ncig ntawm.
Ob lub electrodes tuaj yeem nyeem ob qho tib si hauv kev qhia tshwj xeeb thiab tseem txawv txaus los hloov cov kab kub kub npaum li cas. Cov lus nug tseem ceeb tsis yog seb ib pawg dhau los tab sis qhov twg hauv pawg nws tsaws - a400 hli graphite electrodentawm qhov kawg nruj thiab ib qho ntawm lub qab nthab yog ob qho tib si ua raws thiab tsis yog tib yam khoom hauv kev pabcuam.
Ntau npaum li cas lub zog resistivity hloov mus rau cua sov hauv kab?
Cov lej lej luv luv ua ntej koj xaj. Kev tiv thaiv ib 'meter' ntog raws li txoj kab uas hla nce, txij li ntau qhov hla ntu nqa tam sim no. Tab sis ntawm qhov ceev ceev tam sim no nce nrog lub square ntawm txoj kab uas hla, yog li poob ib 'meter' nce nrog nws. Lub electrode loj dua tsis tau txais qhov txias dua.
Lub rooj siv lub RP qab nthab cov duab: resistivity ntawm 8.0 μΩ·m, tam sim no ceev ntawm 17 A / cm², thiab tus ntoo khaub lig-section implied los ntawm nominal txoj kab uas hla. Poob ib 'meter' yog I²R rau ib 'meter' ntawm kab.
| Nominal txoj kab uas hla | Hla ntu | Tam sim no ntawm 17 A / cm² | Kuj ib 'meter' | Ohmic poob ib 'meter' |
|---|---|---|---|---|
| 400mm | 1,257 m² os | 21.4 kA | 63.7 μΩ | 29 kW |
| 500mm | 1, 963 m² | 33.4 kA | 40.7 μΩ | 45 kW |
| 600mm | 2,827m 2 ,ua | 48.1 kA | 28.3 μΩ | 65 kW |
Nyeem kab ntawv kawg tawm tsam thawj. A500 hli graphite electrodenqa txog ob feem peb ntawm qhov kev tiv thaiv ib 'meter' ntawm 400mm kem thiab tseem poob ntau lub zog nyob rau tib qhov deb, vim tias nws nqa ntau dua tam sim no. Resistivity multiplies ib tug tam sim no koj twb xaiv lawm; nws tsis ua ib leeg.
Tam sim no tuav txoj kab uas hla thiab hloov qib. Ib kab 500 hli ntawm 17 A / cm² poob txog 45 kW ib 'meter' ntawm 8.0 μΩ·m thiab txog 37 kW ib 'meter' ntawm 6.5 μΩ·m. Yim kilowatts ib 'meter' tsis yog ib qho kev ua yuam kev ntawm ib kem uas khiav ntau meters ntawm txoj kev tam sim no, thiab nws yog cua sov tso rau hauv graphite, tsis yog hauv da dej.
Qhov ntawd yog cov txheej txheem tom qab qib ntaiv. Tsiv ntawm RP mus rau HP yuav conductivity RP lub luag haujlwm tsis tas yuav tsum tau, thiab tus nqi them txawm tias lub cub tawg tuaj yeem siv tau. Khiav ib qho RP electrode saum nws cov qhab yuav tsis muaj dab tsi: poob nce nrog tam sim no ntom squared thiab nrog resistivity ua ke.
Yuav ua li cas cov cua sov sab hauv ua oxidation thiab noj?
Thaum tshav kub kub hauv kem tsis muaj qhov twg mus tsuas yog tawm ntawm qhov chaw, thiab qhov chaw yog qhov chaw oxidation tshwm sim. Cov phab ntsa sab saum toj ntawm lub nra hnyav tau ntsib cov pa roj carbon dioxide, cov pa oxygen nkag mus rau hauv lub ru tsev, thiab nyob rau hauv lub submerged-arc furnace carbon monoxide thiab silicon monoxide nce tawm tus nqi. Tag nrho cov kev cuam tshuam no khiav nrawm dua ntawm qhov chaw kub dua.
Cov saw no ua rau kev tiv thaiv ib qho kev sib txawv ntawm kev noj ntau dua li qhov kev xav paub. Kev tiv thaiv siab dua nce qhov kub ntawm cov graphite raws nws qhov ntev, qhov kub ntawm sab phab ntsa oxidises sai dua, thiab cov khoom tawm saum lub nra ntawm kab uas tsis muaj arc ua rau qhov poob. Txoj kab uas hla nyias nyias raws li kev sib tw khiav.
Ib sab thinned ces tsim nws tus kheej qhov teeb meem thib ob. The cross-section carrying the current is smaller, so local current density rises, so local loss rises, and the surface gets hotter still. Qhov kev nce qib yog maj mam thiab yooj yim kom nco lub lim tiam mus rau ib lub lim tiam, uas yog vim li cas kev noj haus uas nce siab feem ntau tsis muaj ib qho laj thawj.
Tsis muaj ib phaus-ib-tonne tuaj yeem luam tawm ntawm no, vim tias tus nqi nyob ntawm qhov cub cua sov, nqi chemistry, huab cua ingress thiab cov qauv ua haujlwm. Dab tsi tuaj yeem hais tau yog cov kev taw qhia: ntawm qhov ceev tam sim no, cov batch ze rau ntawm 8.0 μΩ·m qab nthab khiav kub dua raws nws qhov ntev dua ib qhov dej hauv nws, thiab qhov sib txawv qhia thawj zaug ntawm phab ntsa es tsis yog ntawm lub ntsis.
Tib yam poob mus txog qhov sib koom ua ke. Tam sim no dhau los ntawm lub txiv mis interface, qhov chaw sib cuag me me ntawm lub cev, thiab ib qho kev tiv thaiv muaj ntxiv rau lub cev poob, uas yog vim li cas.graphite electrode pob qij txhauas qias neeg los yog tsis zoo zaum khiav kub thiab erode ntawm xov. Kev sib koom ua ke yog nyob rau hauv tib qho kev sib tham raws li kev tiv thaiv, tsis yog nyob rau hauv ib qho kev sib cais txog kev tuav.
Vim li cas tib daim duab resistivity coj txawv ntawm cov diameters?
Vim hais tias resistivity yog cov khoom vaj khoom tsev thiab kev poob yog qhov tshwm sim ntawm qhov system. Lub μΩ·m daim duab mus nrog cov batch; cov kilowatts nyob ntawm seb koj ua dab tsi nrog nws. Ob lub mills tuaj yeem yuav cov khoom siv hluav taws xob los ntawm tib qhov kev tsim khoom thiab khiav lawv ntawm qhov sib txawv ntawm qhov kub thiab txias, tsuas yog vim tias ib qho ua haujlwm ntawm 400mm kem ntawm 15 A / cm² thiab lwm qhov thawb 600mm kem mus rau sab saum toj ntawm cov qhab.
Qhov ntawd muaj qhov ua tau raws li qhov tshwj xeeb. Yog tias koj lub qhov cub ua haujlwm ze ntawm RP qab nthab, cov kab hluav taws xob tsim nyog yuav tsum muaj kev txwv nruj dua li daim ntawv qhia qib. Yog hais tias nws khiav zoo hauv qab lub qab nthab, tus qauv band yog txaus thiab them nyiaj rau ib tug nruj dua yuav cov paj uas koj yuav tsis siv. Qhov kev txiav txim siab yog nyob rau qhov chaw ua haujlwm, tsis yog rau cov ntaub ntawv.
Txoj kab uas hla yog lwm ib nrab ntawm kev xaiv, thiab kev txiav txim siab tsim es tsis yog qhov kev nyiam yuav khoom. Ib kab loj dua txo qhov tsis kam ntawm ib lub 'meter' ntawm tib qhov tam sim no, tab sis ntawm qhov ceev tam sim no nws nqa proportionally tam sim no thiab dissipates ntau cua sov ib 'meter'. Ib nrab-size kem yog ib qho kev sib haum xeeb: txaus hla ntu kom ceev tam sim no hauv RP band yam tsis muaj qhov poob profile ntawm kab loj heev.
Txoj kev ntev tam sim no yog qhov sib txawv thib peb. Poob accumulates ib 'meter', yog li ib sab siab nrog ntau pob qij txha muaj ntau meters rau cua sov, uas tso cai rau kem tsim thiab electrode ntev nyob rau hauv tib lub tshuaj ntsuam xyuas raws li qib xaiv.
Cov kab resistivity ntawm COA txhais li cas ntawm kev txais?
Ntawm Graphite Electrode COA nws txhais tau tias peb yam: tus nqi, tus qauv tom qab nws, thiab cov batch nws belongs rau. Tso cov qauv thiab tus naj npawb tsis tuaj yeem nqa tau, txij li qhov tshwm sim ntawm qhov kev tiv thaiv nyob ntawm tus qauv thiab kev sib cuag tau siv kom tau txais nws. Tso lub batch identifier thiab tus lej tsis txuas ntxiv rau cov electrodes sawv hauv koj lub vaj.
Ntawm qhov lees txais, qhov kev qhuab qhia tseem ceeb yog los hloov cov nqi tshaj tawm rau hauv chav tsev uas koj tau tswj hwm tiag tiag. Siv daim duab batch, txoj kab uas hla, qhov ceev tam sim no koj lub cub tawg yuav khiav, thiab suav poob ib 'meter'. Ib pawg ntawm 7.6 μΩ·m ntawm 500mm kem ntawm 17 A / cm² dissipates txog 43 kW ib meter; ib pawg ntawm 8.0 dissipates txog 45 kW. Qhov txawv yog me me rau ib 'meter' thiab multiplies tshaj lub phiaj los nqis tes.
Kev lees txais yuav tsum tau hais txog qhov kev coj ua ntawm kev zam. Rau kev tiv thaiv, qis dua yog qhov kev nyab xeeb sab, thiab ib pawg saum lub qab nthab yog qhov sib txawv txawm tias qhov seem ntawm daim ntawv pov thawj zoo li cas. Ib pawg nyob deb hauv qab nws tsis tuaj yeem zoo dua, vim tias qib lwm yam khoom tau sib npaug ntawm cov phiaj xwm phiaj xwm - tab sis nws tsis yog qhov txaus ntshai tib yam.
Qhov kev lees txais thib peb yog qhov sib xws ntawm cov khoom siv. Resistivity variation ntawm kev xa khoom muaj kev cuam tshuam ntau dua li kev nyeem ntawv siab ib zaug, vim tias nws hloov pauv tus cwj pwm thermal ntawm kem ntawm kev sib tw thiab ua rau kev sib piv kev noj haus tsis muaj nuj nqis. Yog hais tias ob daim ntawv pov thawj nyob rau hauv ib tug kab txawv dav, nug dab tsi hloov nyob rau hauv lub mix los yog lub graphitisation voj voog ua ntej lees txais cov lus piav qhia tias ob qho tib si nyob rau hauv specification.
Qhov twg yuav tsum tus neeg yuav khoom RP teeb qhov chaw txais?
Nyob rau hauv lub band, thiab hais nyob rau hauv kev sau ntawv. Qib txwv ntawm 8.0 μΩ·m yog sab nraud ntawm qhov RP txhais tau li cas; nws tsis yog lub hom phiaj khiav ntawm. Tus neeg yuav khoom uas sau "RP, kev tiv thaiv rau ASTM C611, batch tus nqi tshaj tawm ntawm COA" tau thov rau ib daim ntawv. Ib tus neeg yuav khoom uas sau qhov kev txwv, cov txheej txheem thiab cov lus ceeb toom yuav tsum tau nug txog qhov tshwj xeeb uas tuaj yeem siv tau.
Qhov thib ob qhov chaw yog qhov chaw ua haujlwm. Paub meej tias qhov ceev tam sim no lub cub tawg yuav khiav ua ntej kev txiav txim, vim hais tias ib kem nyob ze 17 A / cm² tsis tshua muaj siab ntev rau ib pawg nyob rau sab saum toj ntawm cov qhab dua li ntawm 12 A / cm². Daim duab zoo yog los ntawm koj lub transformer, electrode suav thiab txoj kab uas hla, tsis yog los ntawm lub rooj.
Qhov thib peb yog qhov sib koom ua ke. Resistivity los ntawm kem muaj xws li lub interface, thiab ib tug huv tab sis dhau-torqued sib koom, los yog ib tug matched nyob rau hauv xov tab sis tsis nyob rau hauv lub rooj zaum, ntxiv kuj tsis muaj daim ntawv pov thawj npog. Qhia meej hom txiv mis, zaum qhov sib koom ua ke rau daim duab kos, thiab tshuaj xyuas nws ntawm txhua daim ntawv.
Cov lus nug nquag
Dab tsi yog qhov zoo hluav taws xob tiv thaiv tus nqi rau RP electrode?
Ntawm los yog qis dua 8.0 μΩ·m, hais raws li ib qho kev qhia tshwj xeeb, nrog cov nqi batch qhia rau ASTM C611. Daim duab yog lub qab nthab ntau dua li lub hom phiaj. Qhov twg ib pawg zaum hauv cov band tseem ceeb npaum li cas cov kab khiav kub, thiab tus neeg yuav khoom ua haujlwm ze 17 A / cm² yuav tsum kho lub qab nthab raws li kev txwv tsis pub ua haujlwm.
Puas yog kev tiv thaiv qis ib txwm txhais tau tias qis dua?
Tsis yog. Kev siv yog tsav los ntawm qhov kub thiab txias ntawm huab cua ntau dua los ntawm tus qauv tiv thaiv ib leeg. Ib qho hluav taws xob qis qis khiav kub ntawm qhov siab tam sim no tuaj yeem haus ntau tshaj li ib nrab-band batch khiav txias, thiab lub cub tawg nrog hnyav cua ingress oxidises sai dua tsis hais qib twg. Resistivity yog ib tug lever ntawm ob peb.
Yuav ntsuas qhov ntsuas li cas ntawm RP batch?
Los ntawm ASTM C611 ntawm cov qauv txiav los ntawm cov batch, nrog cov txiaj ntsig tau tshaj tawm tawm tsam tus cim batch ntawm COA. Cov txheej txheem yog dab tsi ua rau ob daim duab piv rau txhua qhov, vim hais tias cov qauv loj thiab hu rau ob qho tib si hloov kev nyeem ntawv. Nug cov txheej txheem kom tshwm sim ntawm tus lej es tsis yog lwm qhov ntawm nplooj ntawv.
Puas tuaj yeem tiv taus piav qhia txog kev nce siab ntawm kev noj?
Qee lub sij hawm, thiab nws tsim nyog xyuas ua ntej yuav thuam lub qhov cub. Ib pawg uas tuaj txog ze rau sab saum toj ntawm cov qhab, khiav ntawm qhov ceev tam sim no uas tau nkag mus tom qab hloov pauv hloov, yuav khiav ntsuas kub raws nws qhov ntev. Sib piv ob daim ntawv pov thawj kawg thiab cov kev khiav hauj lwm tam sim no ua ntej txiav txim siab tias tus nqi lossis huab cua yog lub luag haujlwm.
Ntsiab Cai
- Resistivity yog ib qho kev hloov pauv, tsis yog qhov qhab nia zoo: ntawm 8.0 μΩ·m thiab 17 A / cm² ib 500mm RP kem poob txog 45 kW ib meter.
- Txoj kab uas hla loj dua txo qhov tsis kam ntawm ib 'meter' tab sis nce tam sim no ntawm qhov ceev tam sim no, yog li poob ib 'meter' nce nrog txoj kab uas hla.
- Cov cua sov sab hauv tsav sab phab ntsa oxidation, uas yog vim li cas qhov kev tiv thaiv zoo li kev noj ntau dua li qhov sib txawv ntawm qhov ntsuas.
- Kev lees txais txhais tau tias muaj nuj nqis, txoj hauv kev thiab batch ua ke, nrog rau daim duab batch hloov mus rau qhov poob ntawm koj tus kheej qhov chaw ua haujlwm.
Txheeb xyuas qhov Resistivity Band Tawm tsam Koj Qhov Chaw Ua Haujlwm
Xa txoj kab uas hla, qib thiab qhov ceev tam sim no koj lub cub tawg khiav, thiab peb yuav lees paub qhov tshwj xeeb tiv thaiv cov qhab thiab cov sijhawm xa khoom tawm tsam koj qhov kev sib tw. Yog tias kev noj tau txav mus, suav nrog cov nqi tiv thaiv los ntawm koj daim ntawv pov thawj thib ob yog li qhov kev sib piv pib los ntawm koj tus kheej cov ntaub ntawv.
WhatsApp: +86 155 1882 4805 · Email: inquiry@zaferroalloy.com· lossis xa daim foos rau ntawm pebhu rau nplooj ntawv
Txoj kab uas hla:
Qib (RP/HP/UHP):
Ntev (mm):
Hom txiv mis (T3 / T4 / T5 / T6):
Tam sim no qhov ceev (A / cm²):
Lub hli ntau (t):
Qhov chaw nres nkoj:
Kev tawm tsam los ntawm koj ob lub COA kawg (yeem):
Kev Nyeem Ntawv
- Graphite Electrode Thermal Expansion cuam tshuam li cas rau kev ua tau zoo thaum kub kub hloov pauv?- Piav seb qhov cua sov qhov kev ntsuas qhov ntsuas no ua rau hloov pauv kev sib koom ua ntej thiab kev tshem tawm.
- Yuav Ua Li Cas Pab Pawg Muag Khoom Tshawb Xyuas Thaum Graphite Electrode Dimensions txawv ntawm Kev Yuav Khoom?- Qhia cov neeg yuav khoom txheeb xyuas cov ntaub ntawv thiab qhov ntev ua ntej tso RP xaj.
- Dab tsi ua rau Graphite Electrode Oxidation Thaum Kub Kub Hluav Taws Xob Hluav Taws Xob Hluav Taws Xob Ua Haujlwm?- Qhia txog sab phab ntsa oxidation mechanism uas hloov kab cua sov rau hauv electrode noj.