Kev siv cov graphite electrodes hauv cov cub hluav taws xob arc yog ib qho tseem ceeb rau kev txhim kho lawv lub neej thiab kev ua haujlwm zoo. Cov cub hluav taws xob arc, ua ib hom khoom siv hlau tseem ceeb, siv dav hauv kev lag luam xws li hlau thiab cov hlau tsis yog ferrous. Nws txoj cai ua haujlwm yog ua kom sov thiab yaj cov hlau los ntawm qhov kub siab hluav taws xob arc tsim ntawm lub electrode thiab tus nqi. Graphite electrodes, vim lawv cov khoom siv lub cev thiab tshuaj lom neeg tshwj xeeb, ua rau muaj kev ua tau zoo heev hauv cov cub hluav taws xob arc, yog li ua rau lub neej ua haujlwm ntawm cov cub hluav taws xob arc zoo dua. Cov hauv qab no yog kev tshuaj xyuas ntxaws ntxaws los ntawm ntau yam ntawm yuav ua li cas graphite electrodes tuaj yeem txhim kho lub neej ntawm cov cub hluav taws xob arc.
1. Kev ruaj khov kub siab
Graphite muaj qhov kub thiab txias heev, nrog rau qhov kub yaj txog li 3650 ℃, uas siab dua li qhov kub yaj ntawm feem ntau cov hlau thiab cov hlau sib xyaw. Hauv lub cub hluav taws xob arc, cov electrodes yuav tsum tiv taus qhov kub siab txog li 3000 ℃, tsis tas li ntawd, cov electrodes graphite tseem tuaj yeem tswj tau cov khoom siv lub cev thiab tshuaj ruaj khov hauv qab cov xwm txheej hnyav no. Qhov sib piv, cov electrodes ua los ntawm lwm cov ntaub ntawv feem ntau yuav mos, deform lossis txawm tias yaj ntawm qhov kub siab, ua rau lub neej electrode luv dua. Qhov kub siab ruaj khov ntawm cov electrode graphite ua kom ntseeg tau tias nws tsis yooj yim puas tsuaj hauv qhov chaw ua haujlwm kub ntev, yog li ntawd ntev lub neej kev pabcuam ntawm lub cub hluav taws xob arc.
2. Kev ua hluav taws xob zoo heev
Hluav taws xob graphite muaj kev ua hluav taws xob zoo heev, nrog rau qhov tsis tshua muaj resistivity thiab muaj peev xwm coj tam sim no tau zoo. Hauv lub cub hluav taws xob arc, cov electrodes yuav tsum hloov lub zog hluav taws xob mus rau hauv lub zog thermal. Qhov tsis tshua muaj resistance ntawm cov electrodes graphite txo qhov poob hluav taws xob, yog li ua kom muaj kev siv hluav taws xob zoo dua. Tsis tas li ntawd, qhov tsis tshua muaj resistance kuj txo cov cua sov uas tsim los ntawm cov electrode nws tus kheej, txo qhov kev pheej hmoo ntawm kev puas tsuaj ntawm electrode vim overheating. Kev ua hluav taws xob siab tsis yog tsuas yog ua kom muaj kev ua haujlwm zoo ntawm lub cub hluav taws xob arc, tab sis kuj txo qhov hnav ntawm cov electrodes thiab ua rau lawv lub neej ntev dua.
3. Lub zog kho tshuab zoo
Graphite hluav taws xob arc muaj lub zog kho tshuab siab thiab tuaj yeem tiv taus kev ntxhov siab thiab kev co thaum lub sijhawm ua haujlwm ntawm lub cub tawg hluav taws xob arc. Hauv lub cub tawg hluav taws xob arc, cov electrodes yuav tsum txav mus rau saum thiab nqis ntau zaus kom kho qhov ntev ntawm lub arc, thaum tseem yuav tsum tiv taus qhov cuam tshuam thiab siab ntawm cov hlau yaj hauv lub cub tawg. Lub zog siab thiab kev tawv ntawm graphite electrodes ua rau lawv tsis yooj yim tawg lossis hnav nyob rau hauv cov xwm txheej ua haujlwm nyuaj, yog li txo qhov zaus ntawm kev hloov electrode thiab ntev lub neej kev pabcuam ntawm cov cub tawg hluav taws xob arc.
4. Kev tiv thaiv thermal poob siab
Qhov kub ntawm qhov chaw ua haujlwm ntawm lub cub hluav taws xob arc hloov pauv sai heev, thiab cov electrodes yuav tsum tau ua kom txias sai sai los ntawm qhov kub siab mus rau qhov kub qis. Cov electrodes graphite muaj kev tiv thaiv thermal shock zoo heev thiab tuaj yeem tswj tau qhov ruaj khov ntawm cov qauv thaum qhov kub hloov pauv sai, thiab tsis yooj yim tawg lossis puas tsuaj vim muaj kev ntxhov siab thermal. Cov yam ntxwv no ua rau cov electrode graphite ua haujlwm ruaj khov rau lub sijhawm ntev hauv lub cub hluav taws xob arc, txo cov electrode tsis ua haujlwm los ntawm thermal shock, thiab yog li ua rau lub neej ua haujlwm ntawm lub cub hluav taws xob arc ntev dua.
5. Kev tiv thaiv tshuaj lom neeg
Hauv lub cub hluav taws xob arc, cov electrodes kov tau ntau yam hlau oxides, slag thiab lwm yam tshuaj lom neeg. Cov graphite electrodes muaj kev tiv thaiv xeb zoo heev thiab tuaj yeem tiv taus kev puas tsuaj ntawm feem ntau cov kua qaub, alkalis thiab oxides. Cov yam ntxwv no ua rau cov graphite electrodes tsis yooj yim rau xeb lossis oxidation hauv cov chaw muaj tshuaj lom neeg hnyav, yog li txo cov electrode hnav thiab ntev lawv lub neej kev pabcuam.
6. Cov coefficient qis ntawm kev nthuav dav thermal
Tus coefficient ntawm thermal expansion ntawm graphite electrodes yog qhov tsawg heev, uas txhais tau tias lawv cov kev hloov pauv me me ntawm qhov kub siab. Tus coefficient qis ntawm thermal expansion ua rau graphite electrode tsis tshua muaj feem ua rau muaj kev ntxhov siab lossis deformation vim thermal expansion hauv qhov chaw ua haujlwm kub siab, yog li txo qhov kev pheej hmoo ntawm kev puas tsuaj ntawm electrode. Qhov cwj pwm no ua rau graphite electrode ruaj khov thaum lub sijhawm ua haujlwm kub siab ntev, yog li ua rau lub neej ua haujlwm ntawm lub cub tawg hluav taws xob ntev dua.
7. Cov khoom siv lubricating tus kheej
Graphite muaj cov yam ntxwv uas nws tus kheej lubricating thiab tuaj yeem txo qhov sib txhuam nrog lwm cov khoom ntawm qhov kub siab. Cov yam ntxwv no ua rau kev txav mus los ntawm graphite electrodes hauv cov cub tawg hluav taws xob arc du dua, txo qhov hnav thiab kev puas tsuaj los ntawm kev sib txhuam. Cov yam ntxwv uas nws tus kheej lubricating tsis yog tsuas yog ua rau lub neej ua haujlwm ntawm cov electrodes ntev dua tab sis kuj txo cov nqi kho ntawm cov cub tawg hluav taws xob arc.
8. Kev phooj ywg ib puag ncig
Cov hluav taws xob graphite tsim cov pa phem tsawg dua thaum lub sijhawm tsim khoom thiab siv, thiab yooj yim rau kev rov ua dua tshiab. Qhov kev phooj ywg ib puag ncig no tsis yog tsuas yog ua tau raws li cov kev xav tau kev txhim kho kom ruaj khov ntawm kev lag luam niaj hnub no, tab sis kuj txo cov khoom siv puas tsuaj thiab lub neej luv luv los ntawm kev ua qias tuaj ib puag ncig.
Xaus lus
Xaus lus, cov graphite electrodes ua tau zoo heev hauv cov cub hluav taws xob arc vim lawv qhov ruaj khov kub, ua hluav taws xob zoo heev, muaj zog zoo, tiv taus thermal shock, tiv taus tshuaj corrosion, coefficient qis ntawm thermal nthuav dav, lubrication tus kheej, thiab kev phooj ywg ib puag ncig. Cov yam ntxwv no tsis tsuas yog txhim kho kev ua haujlwm zoo thiab kev siv hluav taws xob ntawm lub cub hluav taws xob arc, tab sis kuj ua rau nws lub neej ua haujlwm ntev dua. Yog li ntawd, graphite electrodes tau dhau los ua cov khoom tseem ceeb hauv cov cub hluav taws xob arc, muab kev txhawb nqa tseem ceeb rau kev txhim kho kev lag luam metallurgical niaj hnub.
Lub sijhawm tshaj tawm: Lub Rau Hli-23-2025