Tseem ceeb siv ntawm graphite electrodes

1. Fais ntawm arc rauv
Los ntawm kev ua lub zog hluav taws xob siab tam sim no los ntawm lub zog hluav taws xob, graphite electrodes tsim arc uas ua rau muaj kev kub siab txog 3000 degree. Qhov no feem ntau tshwm sim ntawm cov lus qhia electrode thiab cov ntawv sau ua hlau hauv lub cub tawg, uas yog qhov tseem ceeb rau melting cov hlau.

Cov cua sov tsim los ntawm arc ua rau seem rau liquefy rau hauv cov txheej txheem melting sai sai, yog li ua kom nws mus rau cov khoom tshiab steel. Koj tuaj yeem tswj qhov ntsuas kub nyob rau hauv lub cub tawg los ntawm kev kho qhov tam sim no ntws los ntawm graphip electrode. Qhov no nyob ntawm cov txheej txheem hlau theem thiab cov yam xav tau.

Graphite electrodes hauv hluav taws xob arc ua kom yooj yim ua kom yooj yim txhaj tshuaj oxygen. Ntawm no, oxygen tau qhia rau oxidize impurities nyob rau hauv cov hlau, xws li phosphorus, carbon thiab leej faj, yog li txhim kho tau zoo.

Thaum lub sij hawm yaj yaj, impurities nce los ua slag. Lub arc tsim los ntawm graphite electrode pab lub slag ua npuas ncauj, uas txhim kho lub zog ua haujlwm ntawm lub cub hluav taws xob los ntawm insulator. Qhov tshwm sim yog tias cua sov tau daig hauv lub cub tawg, tiv thaiv cov kab thiab txo hluav taws xob hnav.

Ntxiv cov ntsiab lus cog rau Molten hlau tsim cov qib sib txawv. Graphite electrodes tuaj yeem tswj hwm cov cua sov tsim tawm, tso cai rau qhov tseeb ntxiv thiab sib tov ntawm alloys nrog hlau. Xws li alloys suav nrog Vanadium, chromium, thiab npib tsib xee.
2. Kev ntsuas hluav taws xob ntawm cov ntxhia
Cov duab puab yog qhov tseem ceeb nyob rau hauv lub tshuab hluav taws xob ntawm cov ntxhia thiab ores, pab hloov cov zaub mov ua kom zoo lossis cov hlau. Los ntawm kev ua hluav taws xob tam sim no mus rau hauv lub cub hluav taws xob nrog cov hluav taws xob nrog cov cua sov tsim cov cua sov lossis arcing, uas tsim kom muaj qhov ntsuas kub uas yuav tsum muaj.

Ib qho kev siv ntawd yog nyob rau hauv kev tsim cov ferroalloys, qhov tseem ceeb rau ferrosilicon, ferromanganese, ferromrome, thiab ferronickel. Cov ferroalloys yog ua los ntawm kev txo cov hlau liab thiab sib txuas nrog lwm cov khoom xws li manganese, silicon, lossis chromium.

Ntxiv rau, graphite electrodes nrhiav tau ntau yam hauv kev tsim cov khoom silicon thiab calcium carbide. Kev tsim khoom yog nqa tawm nyob rau hauv submerged arc rauv taws nrog high-} kev kub siab. Calcium carbide yog siv los tsim cov roj acetylene roj, thaum lub sijhawm silicon carbide yog siv ua cov khoom siv abrasive thiab tej hub thiab tej hub.

Nyob rau hauv electrometallurgurgurgurgurgurgurgurgurgurgurgurgurgurgurgurgurgurgy, graphite hluav taws xob txo cov hlau ores, hloov cov hlau oxides rau hauv cov hlau ntshiab. Qhov no tau ua tiav los ntawm kev thov cov cua sov siab los pib siv tshuaj lom neeg cov tshuaj tiv thaiv uas ua rau cov pa sib cais los ntawm cov hlau.
3. Submerged Steel Furnaces
Graphite cov ntawv hluav taws xob yog siv nyob rau hauv submerged arc rauv (Saf) feem ntau siv hauv kev tsim cov hlau. Cov electrodes coj tam sim no rau hauv lub cub hluavtaws, qhov chaw uas lawv txuas ntxiv thiab yog immersed nyob rau hauv raw khoom sib xyaw.

Thaum cov txheej txheem tam sim no los ntawm cov electrodes, ARC yog tsim tawm, uas tuaj yeem ncav cuag qhov kub ntau tshaj 3000 degree. Qhov kub no yog txaus rau smelt thiab yaj cov ntaub ntawv raw rau kev tsim cov hlau lossis lwm yam cuam tshuam.

Txawm li cas los xij, cov duab hluav taws xob graphite no tuaj yeem siv los txo cov hlau los ua cov hlau ua kua, uas yog tom qab ua kom zoo nkauj rau hauv cov hlau. Thaum lub sij hawm smelting, impurities ua rau slag, thiab graphite hluav taws xob tuaj yeem ua kom lub ntsej muag los ntawm kev ua npuas ncauj. Qhov no txhim kho kev txuag hluav taws xob.

Thaum lub sij hawm submerged Arc txheej txheem, qhov taub ntawm graphite electrode yog nyob rau hauv raw kev sib cuag nrog cov khoom siv nyoos, uas txhim kho thaum tshav kub hloov. Yog li no, lub zog ntawm electrode yog siv rau melting thiab kho cov hlau.

4. Foundries
Graphite cov ntawv hluav taws xob feem ntau yog siv nyob rau hauv cov peev xwm rau high - cov txheej txheem kub xws li smelting thiab kho hlau. Cov foundries tuaj yeem ua cov txheej txheem ntaus hlau xws li cam khwb cia hlau thiab hlau thiab tsis yog} ferrous hlau xws li tooj dag, txhuas thiab tooj dag.

Graphite hluav taws xob tau siv nyob rau hauv foundries kom yaj cov ntawv hlau lossis cov khoom siv raw los ntawm kev ua hluav taws xob hluav taws xob hauv cov hluav taws xob ua kom sov. Cov cua sov tsim tau tuaj yeem ncav qhov kev kub ntxhov ntawm ntau tshaj 3000 degree, uas yog qhov siab txaus kom tau txais cov hlau kom zoo, hlau, thiab lwm yam alloys.

Foundries uas ua hauj lwm Graphite hluav taws xob tsim cov alloys los ntawm melting cov hlau uas muaj lwm cov ntsiab lus kom ua tiav cov khoom ntiag tug. Cov hluav taws xob no muab cov tshuaj tiv thaiv cua sov yuav tsum tau kom meej meej thiab muab cov hlau, ua rau muaj kev sib tw siab.

Graphite hluav kuj tseem siv nyob rau hauv foundries 'chav tsev kom sov nyob qhov twg cov hlau tsis muaj peev xwm ntxiv rau cov tshuaj lom neeg muaj pes tsawg leeg. Qhov no feem ntau ua tiav los ntawm kev tshem tawm impurities lossis ntxiv cov ntsiab lus. Cov khoom cua kub ntxiv ua rau cov kav hlau ua haujlwm ntawm qhov ntsuas kub txaus rau kev kho kom zoo.

Cam khwb cia cov foundries siv graphite electrodes rau arc yaj los tsim hlau los ntawm seem thiab npua hlau. Cov cua sov tsim melts cov khoom siv raw thiab ua kom lawv molten thaum lub sij hawm casting txheej txheem. Qhov no yog siv los tsim cov khoom cam khwb cia xws li cov cav ntoo.

Casting cov ntawv thov siv Graphite crucibles thiab pwm siv cov ntaub ntawv hluav taws xob graphite raws li cov khoom sib xyaw. Qhov no yog vim lawv qhov kub kub ua hauj lwm thiab zoo heev thermal conductivity. Xws li crucibles melt hlau xws li kub thiab nyiaj, qhov twg tsis kam rau kev paug yog qhov tseem ceeb.
5. Electrospark Machining
Graphite electrodes yog electopark machining (edm), uas siv hluav taws xob ua rau cov duab thiab cov khoom siv. Qhov kev txiav txim siab no siv cov hluav taws xob taws teeb hluav taws xob ntawm ib qho electrode thiab ib qho chaw ua haujlwm hluav taws xob, feem ntau hauv kev ua kua dej dielectric.

Qhov EDM electrode feem ntau yog tsim nyob rau hauv qhov xav tau geometry, evapating cov khoom siv hluav taws xob tawm, ua tiav cov qauv hluav taws xob. Cov hluav taws xob hluav taws xob zoo ntawm Graphite ua kom muaj txiaj ntsig zoo thiab tswj cov khoom raug tshem tawm.

EDM tuaj yeem ua cov txheej txheem nyuaj thiab nyuaj {}} rau {{l} de cov ntaub ntawv tsis tuaj yeem ntsib los ntawm lwm cov kev xaiv. Cov ntaub ntawv no suav nrog cov cuab yeej hlau, cov hlau tawv tawv, thiab tungsten carbide. Qhov no ua tsaug rau lub hardness thiab kub ua rau ntawm graphite electrode.

Hauv qhov no, graphite electrodes txhawb siab siab - precision daim ntawv thov uas xav tau geometries thiab nruj nreem. Koj tuaj yeem tshuab cov duab zoo li xws li kev txhaj tshuaj pwm, tuag {{} Casting Cov pwm, thiab precision Cheebtsam siv hauv Aerospace thiab cov ntawv thov tsheb.

Graphite electrodes yog nyiam nyob rau hauv edm vim tias lawv lub durability thiab kuj tau hnav thaum muaj qhov kub. Nyob rau txheej txheem no, lub electrode thiab workpiece raug rau kev kub siab loj los ntawm cov txim taws. Txawm li cas los xij, graphite tuaj yeem tiv thaiv cov kub uas tsis muaj kev hnav tseem ceeb.

While you can substitute copper for graphite electrodes, the latter is a more cost-effective alternative. Graphite tseem yooj yim rau tshuab rau hauv cov duab nyuaj, uas txo lub sijhawm kev tsim khoom. Graphite kuj tseem sib dua thiab yooj yim dua los tuav dua tooj liab.

6. Laub rauv taws

Cov tsev ua kom huv yog cov chaw ua kom sov meThary siv los kho kom zoo thiab kho cov hlau Molten ua ntej qhov ntsuas kub ua ntej ua ntej. Graphite electrodes yog raus nyob rau hauv Molten Steel thiab Powered los muab hluav taws xob hluav taws xob kom sov cov hlau ua kom sov. Cov chaw ua hluav taws xob no tau siv los tsim cov hlau tshwj xeeb xws li cov roj carbon steel, cov hlau coloy tsawg, thiab cuab yeej hlau.

Lub luag haujlwm ntawm graphite electrodes nyob rau hauv Refining steel nyob rau hauv chav tsev kom zoo li cov txheej txheem xws li kev sib dhos, deoxidation, lossis desulfurization ua ntej cam khwb cia. Cov txheej txheem no yuav muaj feem ntxiv ntawm cov ntsiab lus xws li chromium, npib tsib xee, lossis vanadium kom ua tiav cov khoom xav tau.

Cov cua sov tsim los ntawm cov electrodes ua kom huv si sib xyaw cov ntsiab lus sib xyaw nrog cov hlau Molten. Qhov no ua rau muaj kev sib txuam sib xyaw, uas txhim kho qhov kawg ntawm cov khoom. Tus yuam sij yog muab cov ntsuas kub kom ntsuas kub, uas tuaj yeem ua tiav siv cov electrodes.

Homogenization pab tiv thaiv kev sib cais ntawm alloying cov ntsiab lus los yog impurities, uas tuaj yeem ua rau tsis xws luag nyob rau hauv cov khoom kawg. Tsis tas li ntawd, khaws cov hlau hauv lub xeev molten tso cai rau lub tshuab nqus tsev. Qhov no ua kom pom tseeb tias cov roj uas yaj xws li hydrogen thiab nitrogen muaj txiaj ntsig yam tsis muaj kev sib txawv.

Siv cov hluav taws xob hluav taws xob hauv cov chav ua kom sov los tswj qhov kub ntawm molten hlau pab txo cov cua sov mus rau lub refactory ob sab ntawm lub ladle. Qhov no txo ​​qis downtime thiab txij nkawm ua haujlwm, txuas ntxiv kev pabcuam lub neej ntawm lub tsev.

Graphite electrodes nyob rau hauv lub ladle rauv kuj tseem txhim kho tag nrho cov zog hluav taws xob kev ua hluav taws xob muab piv rau kev ua kom zoo nkauj rau kev ua cua sov txoj kev. Lub Hluav Taws Xob Hluav Taws Xob Zoo Siab kuj ua kom muaj zog hloov hluav taws xob, uas muaj kev siv ntau dua thiab cov nqi khiav haujlwm.
7. Cov txheej txheem graphitization
Thaum lub sij hawm cov txheej txheem graphitization, cov hluav taws xob hluav taws xob hloov cov khoom siv roj carboncasous xws li cov pa roj carbon elecetodes lossis roj av coke rau hauv graphite. Cov txheej txheem yuav tsum muaj cua sov ntau, raug cov pa roj carbon monourts rau kev hloov pauv hloov chaw kub ntawm 2400℃thiab 3000 degree.

Graphite hluav taws xob ua haujlwm cov hluav taws xob hauv cov txheej txheem thaum lub sijhawm teeb meem, tsim kom muaj cua sov kom hloov pauv ntawm cov pa roj carbon rau graphite. Cov txheej txheem hloov dua siab tshiab yog feem ntau ua nyob rau hauv ib qho kev tawm tsam los yog chaeson rauv, nrog hluav taws xob txuas ntxiv los ntawm graphite electrodes.

Tam sim no tsim cua sov los ntawm joule cua sov, nce qhov kub ntawm cov roj carbon cov khoom kom txog thaum nws tuaj yeem txhawb nqa graphitizitization. Cov cua sov ua rau cov pa roj atoms los rov ua dua, ua kom lub hexagonal crystal qauv ntawm graphite.

Siv cov electrodes graphite tso cai rau koj kom tswj tau kub heev rau lub sijhawm ntev. Qhov no yog qhov tseem ceeb rau kev ua tiav cov txheej txheem graphitization, uas tuaj yeem siv sijhawm ntau hnub los hloov cov pa roj carbon rau graphite.

Graphite hluav taws xob yog tsim nyog rau cov kev siv no vim tias lawv tuaj yeem tiv taus kub heev yam tsis muaj kev cuam tshuam lossis yaj. Ib qho ntxiv, thaum lub sijhawm cov txheej txheem graphitization, cov hluav taws xob no kom muaj kev faib tawm lub tshav kub niaj hnub no.
8. Roj teeb raug
Graphite hluav taws xob ua ib lub luag haujlwm hauv roj teeb hauv roj teeb, feem ntau siv los ua cov khoom anode, tshwj xeeb tshaj yog nyob rau hauv lithium {} ion roj teeb. Kev siv cov graphite cov hluav taws xob hauv cov roj teeb yog vim yog graphite cov hluav taws xob zoo, tshuaj lom neeg ruaj khov, thiab kev tso tshuaj kom zoo dua qub, thiab kev tso tshuaj kom zoo dua qub.

Siv cov roj teeb ruaj khov nrog cov khoom siv hluav taws xob zoo thiab ua kom muaj zog, ua rau lawv zoo tshaj plaws rau lub neej ntev. Lub zog hluav taws xob ceev yog ntaus nqi rau graphite lub peev xwm los tuav ntau ntawm cov lithium ions, ua rau muaj peev xwm cia cia.

Graphite, roj teeb lub neej tau txhim kho zoo heev, tso cai rau ntau tus nqi thiab kev tawm mus ncig ua tsis muaj qhov ua tsis tau zoo. Qhov no yog qhov tseem ceeb rau cov ntawv thov xws li hluav taws xob tsheb (EVS) thiab nyob ruaj ruaj lub zog khoom cia cov tshuab.

Graphite electrodes yog qhov zoo tagnrho vim lawv cov kev nplua mias thiab txheeb ze pheej yig piv rau lwm cov ntaub ntawv anode. Ib qho ntxiv, koj tuaj yeem siv graphite cov hluav taws xob nrog cov roj teeb sib txawv, ua rau lawv cov khoom siv hloov tau yooj yim thiab hloov tau yooj yim.

Lub hluav taws xob siab ntawm graphite hluav taws xob hloov nyob rau hauv lub roj teeb, txo lub zog ua rau lub sijhawm them / tso tawm. Cov roj teeb siv cov hluav taws xob graphite muaj cov hluav taws xob nrawm nrawm ntawm cov tshuab hluav taws xob, uas pab ua tiav cov sijhawm zoo dua thiab lub sijhawm them nyiaj sai sai.

Lub thermal stability ntawm graphite enables nws los ua haujlwm dhau qhov ntau ntau yam tsis muaj kev tswj hwm, uas ua rau lub roj cua sov. Qhov no tiv thaiv overheating thiab thermal khiav tawm, tso cai rau cov roj teeb no kom muaj kev nyab xeeb siv cov chaw xav tau xws li cov huab cua sov.

Cov roj teeb siv cov hluav taws xob graphite hluav taws xob muaj txiaj ntsig siab thiab tuaj yeem tswj hwm tus nqi them ntau rau thaum lub sijhawm them / tso tawm. Graphite tseem tuaj yeem tsim thiab ua tiav rau hauv ntau cov duab rau siv hauv cov roj teeb. Ua raws li cov roj teeb tsim, graphite tuaj yeem ua hmoov, ntawv ci lossis flake.
9. Iav smelting
Graphite electrodes yog nyob rau ntawm lub plawv ntawm molten iav ntau lawm thiab pab tsim cov kev kub siab uas yuav tsum tau nyeem cov khoom siv. Nyob rau hauv khob smelting, graphite electrodes yog siv nyob rau hauv hluav taws xob melting rhuab hluav taws xob kom txuag tau cov cua sov rau cov txheej txheem tsom iav.

Graphite hluav taws xob yog siv cov hluav taws xob hauv cov iav melting rauv. Thaum cov tam sim no hla dhau ntawm graphite electrodes, cua sov muaj zog yog tsim vim yog cov cua sov joub cua sov, ua rau muaj kev kub siab.

Lub siab ua haujlwm ntawm graphite electrodes txhais tau tias tsis tshua muaj zog pov tseg hauv cov txheej txheem smelting. Yog li ntawd, kev siv hluav taws xob tag nrho yog qhov qis dua piv rau lwm cov kev coj ua.

Tsis tas li ntawd, graphite electsy ainly, uas minimizes tsis xws luag thiab ua kom pom cov khoom siv roj raw ntawm cov khoom nyoos. Nws zoo heev thermal stability tuaj yeem tiv thaiv cov iav zoo melting kub yam tsis muaj kev ua phem.

Iav smelting yog heev corrosive vim yog cov tshuaj muaj tshuaj ntawm cov iav molten thiab cov roj tso tawm. Txawm li cas los xij, graphite electrodes muaj zoo corrosion tsis kam, ua kom lawv lub neej kev pabcuam ntev thiab txo qhov kev xav tau hloov ntau zaus, yog li txo cov nqi kev lag luam.
10. Cov txheej txheem electrolytic
Hauv cov txheej txheem electrolytic, hluav taws xob tam sim no yog siv los tsav cov tshuaj lom neeg, xws li decomposing sib txuas, tsim cov khoom, lossis kho cov hlau. Graphite cov ntawv hluav taws xob tau siv hauv cov txheej txheem electrolytic vim lawv cov tshuaj ruaj khov, kev ua tau zoo hluav taws xob, thiab corrosion tsis kam.

Nyob rau hauv kev tsim cov tshuaj chlorine thiab sodium hydroxide, graphite cov hluav taws xob feem ntau yog siv los ua anodes los pab txhawb cov electrolysis ntawm brine. Txawm hais tias cov txheej txheem yog reactive heev, cov corrosion tsis kam ntawm graphite graphite graphite cov graphite, sodium hydroxide, thiab hydrogen.

Graphite hluav kuj tseem muaj dav nyob rau hauv electrolytic refining ntawm cov hlau xws li tooj liab, txhuas, thiab zinc. Hauv cov txheej txheem no, lub hleb hlau ua raws li anode thiab graphite muab cov khoom siv tau zoo rau cov hlau kom tau muab tso rau.

Cov ntawv thov ntawm graphite electrodes raws li anodes electrolytic depitional pab kom muaj hlau ntshiab xws li kub, thiab nyiaj los ntawm ores lossis cov kev daws teeb meem. Hloov lwm txoj kev, hauv electroplating, graphite hluav taws xob tau siv ua anodes mus rau oversee cov txheej ntawm ib txheej hlau nyias rau lwm cov khoom.

Hauv cov dej hluav taws xob los tsim cov hydrogen, graphite hluav taws xob tau siv dav siv vim yog lawv corrosion tsis kam. Nyob rau hauv kev lag luam tsim cov tshuaj txhuas, cov duab graphite cov hluav taws xob pabcuam rau anodes kom pab electrolytically txo cov txhuas oxide rau txhuas cov hlau.

Cov roj fluorine yog tsim los ntawm cov electrolysis ntawm hydrofluoric acid, raws li graphite cov hluav taws xob tuaj yeem tiv taus cov chaw muaj teeb meem. Ib yam li ntawd, graphite hluav taws xob tuaj yeem siv rau hauv cov txheej txheem hluav taws xob rau kev kho kom zoo.
11. Ceramic Raug
Cov tshuab hluav taws xob siv hluav taws xob siv hluav taws thiab sinter ceramics siv graphite electrodes los muab hluav taws xob hluav taws xob kom sov lub Kiln. Sintering cuam tshuam nrog cua sov cov hmoov sib cav sib xyaw rau qhov kub thiab txias nyob hauv qab nws qhov taw tes melting. Qhov no ua rau cov lus hais los khi ua ke los ua cov qauv ntom ntom.

Raws li cov cua kub ntsiab hauv cov hluav taws xob kilns rau cov nroj tsuag ceramic, grapite electrodes coj hluav taws xob tam sim no los tsa qhov kub tshaj 2000 degree. Txawm li cas los xij, qhov ntsuas kub tuaj yeem tswj nrog graphite electrodes kom saib xyuas zoo dua.

Siv cov duab hluav taws xob graphite, koj tuaj yeem ncav cuag cov siab uas yuav tsum tau ua rau sinter technics xws li zirconium oxide, thiab silicon carbide. Ib qho ntxiv, hauv cov ceramic tsim, kev siv cov graphite electrodes nyob rau hauv kev siv cua sov cov ntawv thov tau ncaj qha rau cov khoom siv cua sov, uas yog txhim kho kev txuag hluav taws xob.

Thaum tsim kho cov cerartory ceramics (muaj kub kub tiv taus), Graphite cov khoom yog cov khoom siv xaiv vim lawv kub siab tiv thaiv. Graphite hluav kuj tseem tuaj yeem sib xyaw rau cov khoom sib xyaw ua ke los txhim kho cov cua sov lossis hluav taws xob ntawm cov khoom.

12. Nuclear reactors
Thaum graphite electrodes tsis tau meej siv nyob rau hauv cov khoom siv hluav taws xob nuclear, graphite raws li cov khoom siv yog siv ua tus tswj. Lub luag haujlwm ntawm graphite ua tus moderron moderator yog kom qeeb sai- txav neutrons. Kev cais tawm cov me nyuam yaus no tso cai rau lawv kom muaj kev txhawb nqa zoo ntawm cov khoom siv hluav taws xob nuclear.

Hauv qee qhov kev siv hluav taws xob nuclear, xws li high- pa roj {} yog siv los ua cov txheej txheem kev teeb tsa ntxiv rau kev ua tus tswj hwm. Nws yog tsim tshwj xeeb rau siv nyob rau hauv reactor cores thiab roj cov ntsiab lus vim nws zoo heev thermal conductivity thiab kub tsis kam.

Graphite tseem tuaj yeem pom txog neutrons rov qab mus rau hauv cov tub ntxhais, yog li nce tag nrho kev ua haujlwm ntawm cov neutrons thiab reactor. Xav txog Neutrons tuaj yeem txo qhov kev thov rau cov roj nuclear uas yuav tsum tau khaws cov saw sib txuas, yog li txuas lub neej ntawm cov reactor. Koj tuaj yeem kawm paub ntau ntxiv txog graphar nuclear reactors.