Cov teeb meem thiab kev daws teeb meem ntawm Graphite Electrodes hauv Hluav Taws Xob Hluav Taws Xob Steelmaking

12. Yuav ua li cas xaiv electrodes kom raug nyob rau hauv hluav taws xob arc rauv steelmaking?

Raws li tus qauv tsim ntawm lub tshuab hluav taws xob arc rauv, cov electrodes uas ua tau raws li cov khoom siv hluav taws xob hluav taws xob hluav taws xob tau raug xaiv, thiab cov khoom siv nrog cov nqi zoo tshaj plaws raug xaiv. Ua tib zoo xaiv cov electrodes haum rau txhua lub cub tawg yog qhov tsim nyog heev. Cov yam ntxwv tshwj xeeb ntawm steelmaking rauv, txoj kev them nqi, qhov siab tshaj plaws amperage, qhov ntev ntawm cov kab hluav taws xob nyob rau hauv lub gripper, qhov kev ncua deb ntawm lub cub tawg sab phab ntsa thiab cov electrode ncig, thiab lwm yam. Nws yog ib qho tseem ceeb uas yuav tsum tau xav txog thaum xaiv. electrodes rau hluav taws xob arc furnaces.

13. Dab tsi yog qhov cuam tshuam ntawm cov khoom tiv thaiv ntawm kev siv cov electrodes hauv steelmaking?

Lub resistivity ntawm graphite electrodes yog lub cev Performance index uas qhia txog cov hluav taws xob conductivity ntawm electrodes, uas muaj feem xyuam rau cov txheej txheem ntawm cov electrodes. Lub teb chaws muaj cov txiaj ntsig zoo rau qhov kev tiv thaiv ntawm graphite electrodes ntawm txawv specifications thiab ntau yam. Thaum siv cov electrode, nws yuav tsum tau xaiv nyob rau hauv lub resistivity ntau teev los ntawm lub teb chaws metallurgical tus qauv. Kev tiv thaiv siab dhau lawm yuav ua rau cov electrode ua liab thiab kub thaum nws muaj zog, uas yuav ua rau oxidation noj ntawm cov electrode.

14. Dab tsi yog qhov cuam tshuam ntawm cov khoom ntom ntom ntawm kev siv cov electrodes hauv steelmaking?

Qhov ntau ntom ntom ntawm graphite electrode qhia txog lub xeev compact ntawm electrode thiab yog ze ze rau cov txheej txheem tsim khoom ntawm electrode. Lub teb chaws tau teev qhov tseem ceeb rau qhov loj ntawm graphite electrodes ntawm ntau yam tshwj xeeb thiab ntau yam. Cov khoom uas tsis tshua muaj qhov ntom ntom qhia tau hais tias tag nrho cov qauv ntawm cov khoom muaj porosity siab, thiab oxidation tus nqi ntawm cov khoom yog ceev dua thaum cov khoom kub siab, uas yuav ua rau muaj kev nce hauv electrode noj. Feem ntau hais lus, thaum steel mills xaiv electrodes, electrode bulk ntom yog nyob rau hauv tus nqi teev. Txawm li cas los xij, qhov siab dua cov ntom ntom yog, qhov zoo dua, vim tias qee cov hluav taws xob nrog rau cov neeg tsis txaus siab dhau los, uas muaj kev cuam tshuam loj heev, uas yuav cuam tshuam rau cov nroj tsuag steelmaking.

15. Vim li cas steel mills yuav tsum tiv thaiv kev sib xyaw ntawm ntau yam khoom thaum siv graphite electrodes?

Cov graphite electrodes siv los ntawm steel mills feem ntau muab los ntawm ntau lub tuam txhab tsim khoom. Kev sib xyaw ntau yam khoom hauv steelmaking yuav tsis tsuas yog ua rau nws nyuaj rau steel mills los suav cov khoom siv ib leeg xwb, tab sis kuj yog vim qhov sib txawv ntawm cov khoom siv raw thiab kev tsim khoom siv los ntawm cov tuam txhab sib txawv. , Lub cev thiab tshuaj lom neeg thiab kev ua haujlwm siab ntawm electrodes thiab pob qij txha ntawm ntau lub tuam txhab muaj qee qhov sib txawv. Yog li ntawd, qhov sib txuam kam rau ua tsim thaum siv sib xyaw ua ke yuav ua rau cov electrodes poob thiab tawg. Txoj kev siv kom raug yog siv cov khoom ntawm ib qho chaw tsim khoom ib leeg, thiab tom qab ntawd txuas cov khoom ntawm lwm cov chaw tsim khoom tom qab kawg. Txhawm rau txo tus naj npawb ntawm cov khoom siv hluav taws xob hloov pauv siv cov chaw tsim khoom sib txawv, Electrodes ntawm tib lub chaw tsim khoom yuav tsum siv cov pob qij txha ntawm tib lub chaw tsim khoom los tiv thaiv kev siv sib xyaw.

16. Dab tsi yog cov yam ntxwv ntawm koob coke?

Koob coke yog cov khoom siv zoo carbon zoo. Nws tau muab faib ua ob hom: thee series thiab roj series. Qhov saum npoo ntawm koob coke muaj cov kab txaij pom tseeb. Li no nws yog hu ua koob coke. Koob coke yog ib qho yooj yim rau graphitize ntawm qhov kub siab tshaj 2000 degrees. Cov graphite electrode uas ua los ntawm nws tsis tsuas yog muaj qhov tsis tshua muaj zog, siab bulk ntom, tab sis kuj me me thermal expansion coefficient, uas yog qhov kev xaiv zoo tshaj plaws rau kev tsim cov khoom siv hluav taws xob ultra-high-power electrodes thiab high-power electrodes. Tsim nyog raw khoom rau electrodes. Tus nqi ntawm koob coke yog kim kim dua li cov coke zoo tib yam, tam sim no txog 5-8 npaug siab dua.

17. Puas yog lub tshuab nqus tsev ntawm lub tshuab hluav taws xob arc rauv cuam tshuam rau kev noj cov electrodes?

Cov kiv cua siv hauv cov plua plav sau cov txheej txheem ua rau muaj qee qhov tsis zoo thaum lub sijhawm ua haujlwm, uas ua rau kom cov huab cua ntws nyob ib ncig ntawm cov hluav taws xob kub liab thaum lub sij hawm steelmaking, yog li ua rau oxidation noj ntawm cov electrode. Thaum steelmaking, ib qho zoo-kho plua plav sau system yog Nws tuav ib qho chaw ua hauj lwm zoo thiab stabilizes noj cov electrodes.

18. Yuav ua li cas kom tsis txhob nce ntawm electrode noj thaum lub sij hawm steelmaking?

Txhawm rau kom tsis txhob muaj cov khoom siv hluav taws xob ntau ntxiv thaum lub sij hawm tsim cov hlau, cov hauv qab no yuav tsum tau ua: (1) Ua kom muaj lub zog zoo, thiab xa hluav taws xob nyob rau hauv qhov tso cai siv tam sim no ntawm cov electrode raws li cov qauv tsim ntawm lub tshuab hluav taws xob. (2) Tiv thaiv lub arc pib taw tes los ntawm immersing nyob rau hauv lub molten pas dej ua ke. (3) Tiv thaiv cov electrode los ntawm kev muab tso rau hauv cov hlau molten kom muaj cov pa roj carbon ntau. (4) Yog tias muaj kev tso cai, cov electrode txais cov tshuab cua txias. (5) Teem lub tso pa tawm kom raug. (6) Txais cov pa oxygen tshuab kom raug.

19. Lub voj voog ntawm graphite electrodes siv sijhawm ntev npaum li cas?

Cov txheej txheem tsim khoom thiab lub sijhawm sib txuas ntawm ib pawg ntawm ultra-high-power lossis high-power graphite electrodes yog raws li hauv qab no: electrode nias (3 hnub) - ci (25 hnub) - impregnation (4 hnub) - rov ci (15) --Graphitization (10 hnub)--Machining, kev tshuaj xyuas zoo (2 hnub)--Kev ntim khoom tiav thiab xa khoom (1 hnub), uas yog, los ntawm kev pub khoom noj rau cov khoom xa tuaj, ceev tshaj plaws Lub voj voog uas tsis muaj kev lag luam nres yog 60 hnub, thiab cov khoom siv hluav taws xob sib txuas yuav tsum tau siv ob-dipping thiab peb-ci kho dua li electrodes, thiab lub voj voog ntau lawm yog 90 hnub.

20. Dab tsi yog cov yam ntxwv ntawm electrodes tsim los ntawm tandem graphitization furnaces?

Txoj kev loj hlob ntawm cov graphitization rauv yog lub internal tshav kub series graphitization rauv. Txij li tam sim no qhov ceev ntawm cov kab txuas txuas yog tib yam, qhov sib txawv ntawm cov hluav taws xob resistivity yog me me; Qhov thib ob, qhov resistivity ntawm ob qhov kawg ntawm cov khoom graphitized nyob rau hauv cov hlua sab hauv yog me ntsis qis dua qhov nruab nrab ib feem (qhov resistivity ntawm ob qhov kawg ntawm cov khoom graphitized ntawm Acheson rauv yog siab dua qhov nruab nrab ntawm qhov nruab nrab), Nws yog qhov zoo los txo qhov tsis kam ntawm qhov sib koom ua ke thaum tus neeg siv siv nws, thiab txo qhov tshwm sim ntawm overheating thiab redness ntawm qhov sib koom ua ke. Yog li ntawd, qhov zoo sib xws ntawm cov electrodes uas tsim los ntawm tandem graphitization rauv yog zoo dua li ntawm Acheson rauv, thiab nws yog tsim nyog rau zus tau tej cov hluav taws xob arc rauv steelmaking. Xav tau.

21. Vim li cas qhov zoo ntawm electrode pob qij txha ua lub luag haujlwm tseem ceeb hauv hluav taws xob arc rauv steelmaking?

Kev sib koom ua ke ua lub luag haujlwm tseem ceeb hauv kev sib txuas ntawm electrode hauv steelmaking. Qhov zoo ntawm kev sib koom tes yog ncaj qha ntsig txog kev siv cov electrode nyob rau hauv hluav taws xob rauv steelmaking. Txawm hais tias qhov zoo ntawm cov electrode zoo npaum li cas, yog tias tsis muaj kev sib koom ua ke zoo nrog nws, nws yuav teeb meem tuaj yeem tshwm sim. Raws li cov ntaub ntawv cuam tshuam, ntau dua 80 feem pua ​​​​ntawm cov khoom siv hluav taws xob siv hluav taws xob hauv EAF steelmaking yog tshwm sim los ntawm cov pob qij txha tawg thiab cov pob qij txha xoob thiab tripped. Yog li ntawd, kev xaiv cov pob qij txha zoo electrode yog qhov lav rau kev siv EAF steelmaking electrodes.

22. Dab tsi ua tau zoo ntawm graphite electrode (sib koom) cov khoom muaj kev cuam tshuam rau hluav taws xob rauv steelmaking?

(1) Qhov ntsuas zoo xws li bulk ntom, tiv taus, lub zog, Elastic Modulus thiab Thermal nthuav kev coefficiention ntawm electrode. (2) Qhov ntsuas zoo xws li kev ceev ceev, tiv taus, lub zog, elastic modulus thiab thermal nthuav kev coefficiention ntawm kev sib koom ua ke. (3) Qhov tseeb machining ntawm electrodes thiab cov pob qij txha, txawm tias qhov zoo ntawm cov electrodes thiab cov pob qij txha zoo npaum li cas, yog tias tsis muaj qhov tseeb machining qhov tseeb (tsuas yog hais txog kev koom tes ntawm electrodes thiab pob qij txha), kev siv cov nyhuv tsis zoo. (4) Qhov zoo ntawm cov qauv sab hauv ntawm electrodes thiab cov pob qij txha yuav tsum tsis txhob muaj cov kab nrib pleb sab hauv uas ua rau muaj kev phom sij hauv kev siv.

23. Dab tsi yog qhov tshwm sim ntawm oxidation hnyav ntawm lub ntsej muag electrode nyob rau sab saum toj kawg nkaus ntawm tus tuav electrode?

Thaum cov hlau yog tsim nyob rau hauv ib lub qhov cub smelting, seem steel yog hlawv nyob rau hauv lub qhov cub. Nyob rau tib lub sijhawm, vim muaj cov pa oxygen hauv lub qhov cub, qhov siab ntawm cov nplaim hluav taws feem ntau siab dua lub ntsej muag ntawm lub ntsej muag ntawm lub ntsej muag ntawm qhov kawg ntawm tus tuav, uas yooj yim rau oxidize lub electrode kawg lub ntsej muag. Yog tias qhov oxidation loj heev, lub ntsej muag electrode kawg yuav raug deformed los ntawm lub dav hlau ua ib lub dav hlau inclined. Thaum cov electrode tshiab txuas nrog rau sab saud, oxidation deformation ntawm lub ntsej muag kawg ntawm cov hluav taws xob qis tsis tuaj yeem ua kom zoo nrog cov electrode tshiab, thiab qhov sib txawv ntawm electrode yog qhov loj, uas yooj yim ua rau oxidation thiab tawg ntawm sab hauv kev sib koom tes. . Tsis muaj kev hloov pauv ntawm steelmaking tej yam kev mob, qhov kev tiv thaiv zoo tshaj plaws yog ntxiv ib qho kev tiv thaiv npog ntawm electrode kawg lub ntsej muag nyob rau sab sauv kawg ntawm tus tuav los thaiv cov nplaim taws thiab cua, thiaj li tiv thaiv lub electrode kawg lub ntsej muag.