Koob Coke li Filler
Cov muab tub lim yog cov sib sau ua ke uas muab cov electrode nws cov qauv, thiab nws ua rau qhov loj tshaj plaws ntawm qhov loj. Koob coke, ua los ntawm roj av decant roj los yog los ntawm cov thee tar pitch, yog qhov nyiam muab tub lim rau siab zog thiab ultra- siab - fais fab electrodes vim nws qhov muag pom kev zoo nkauj zoo sib xws. Qhov kev sib raug zoo ntawd muaj sia nyob extrusion thiab graphitisation thiab ua kom tsis muaj hluav taws xob tiv taus thiab qis coefficient ntawm thermal expansion. Cov qib tsis tu ncua tuaj yeem siv cov roj av coke zoo tib yam lossis cov coke metallurgical, uas raug nqi tsawg dua tab sis xa cov kev nthuav dav dua thiab tiv taus.
Coal Tar Pitch li Binder
Coal tar pitch yog cov binder uas tuav cov coke hais ua ke hauv lub cev ntsuab thiab tom qab carbonises los tsim cov pa roj carbon matrix txuas ntxiv. Pitch yog tus cwj pwm los ntawm nws qhov muag muag, nws cov ntsiab lus quinoline insoluble thiab nws cov coke tawm los, thiab cov ntsiab lus ntawm cov khoom sib xyaw yog kho kom ntub dej ntawm qhov muab tub lim thiab sau qhov chaw ntawm cov khoom. Thaum ci lub suab decomposes thiab carbonises, shrinking nyob ib ncig ntawm lub muab tub lim thiab tsim cov porous carbon skeleton uas graphitisation tom qab hloov mus rau hauv graphite.
Yuav ua li cas Composition hloov thaum lub sij hawm tsim khoom
Qhov sib xyaw ntawm cov electrode tsis kho thaum sib xyaw ua ke; nws evolved ntawm tus txheej txheem. Kev sib sau ua ke cov coke hais thiab lub suab. Ci ntawm li 800 mus rau 1,000 degrees Celsius tsav tawm cov volatiles thiab hloov lub suab mus rau hauv cov khoom carbon, tawm hauv lub cev ntxeem tau. Impregnation nrog suab tom qab los ntawm re- ci ua rau qee qhov porosity thiab nce ntom. Graphitisation ntawm 2,500 mus rau 3,000 degrees Celsius hloov cov pa roj carbon monoxide mus rau crystalline graphite thiab txo cov tshauv - ua impurities. Machining ces ua tiav qhov ntev thiab cov threaded sockets.
Hom Elemental Composition thiab Tshauv
Hauv cov electrode tiav tag nrho cov pa roj carbon ntau tshaj 99 feem pua. Qhov tsis yog - carbon feem yog tshauv, muaj oxides ntawm silicon, txhuas, hlau, calcium, magnesium thiab sodium muab tau los ntawm raw cov ntaub ntawv, ua ke nrog me me ntawm leej faj. Cov qib hluav taws xob tsis tu ncua feem ntau teev nrog cov tshauv txog li 0.5 feem pua, thaum lub zog siab thiab ultra-siab- qib fais fab tau tuav kom qis qis. Sulfur feem ntau khaws cia qis dua li 0.05 feem pua. Lub cev muaj pes tsawg leeg kuj tseem ceeb: qhov ntom ntom feem ntau poob ntawm 1.6 thiab 1.75 grams ib cubic centimeter, nrog qhov sib npaug raug kaw thiab qhib porosity.
Vim li cas Raw Materials txiav txim siab ua haujlwm
Ob lub electrodes tuaj yeem muaj tib lub qauv qauv thiab tseem coj txawv txawv, vim tias kev ua tau zoo yog tsim los ntawm hom muab tub lim, qhov loj me me, cov ntsiab lus binder thiab kev kho cua sov. Koob coke nrog cov qauv ntxhib thiab sib dhos ua kom qis qis thiab siab thermal shock kuj. A well-graded particle mix gives high density and strength. Lub siab graphitisation kub muab qhov tsis muaj zog. Cov no yog cov hloov pauv uas qhov kev qhia tshwj xeeb tau tswj hwm, thiab lawv yog vim li cas cov khoom siv raw xaiv yog thawj qhov kev txiav txim siab hauv electrode ntau lawm.
Cov lus nug nquag
Q: Dab tsi yog graphite electrode ua los ntawm?
Nws yog tsim los ntawm ib tug muab tub lim ntawm roj av koob coke los yog ib txwm coke thiab ib tug binder ntawm thee tar suab, tsim, ci, graphitised thiab machined rau hauv ib tug cylindrical seem.
Q: Vim li cas rab koob coke siv hauv cov hluav taws xob hluav taws xob siab?
Vim tias nws cov qauv zoo sib xws thaum lub sij hawm extrusion, muab hluav taws xob tsis tshua muaj hluav taws xob thiab qis coefficient ntawm thermal expansion, ob qho tib si ntawm kev txhim kho thermal poob siab.
Q: Lub pitch binder ua li cas?
Nws ntub thiab khi cov coke hais nyob rau hauv lub cev ntsuab, ces carbonises thaum lub sij hawm ci los ua ib tug nruam carbon matrix uas tuav cov electrode ua ke.
Q: Ntau npaum li cas carbon puas ua tiav electrode?
Ntau tshaj 99 feem pua ntawm tag nrho cov pa roj carbon. Cov seem yog tshauv- tsim cov ntxhia teeb meem thiab ib qho me me ntawm leej faj, ob qho tib si yog tswj los ntawm kev qhia tshwj xeeb.
Q: Dab tsi yog qhov ceev ntawm lub electrode?
Feem ntau hais txog 1.6 txog 1.75 grams ib cubic centimeter. Qhov theoretical ntom ntom ntawm graphite yog siab dua, thiab qhov sib txawv sawv cev rau qhov porosity ntawm lub cev tsim.
Q: Vim li cas impurity theem tseem ceeb?
Cov hmoov tshauv tuaj yeem tsim cov khoom sib xyaw hauv cov hlau, thiab cov sulfur tuaj yeem nce cov ntsiab lus ntawm cov sulfur hauv cov yaj, yog li qis - tshauv thiab qis- sulfur muaj pes tsawg leeg tiv thaiv cov hlau ua tau zoo.