Isostatic nias graphiteyog ib yam tshiab ntawm cov khoom siv graphite tsim nyob rau xyoo 1960, uas muaj cov khoom zoo heev.Piv txwv li, isostatic nias graphite muaj cov cua sov zoo.Nyob rau hauv ib qho chaw inert, nws lub zog txhua yam tsis tsuas yog txo qis nrog qhov nce ntawm qhov kub thiab txias, tab sis kuj nce, ncav cuag nws cov nqi siab tshaj ntawm ib ncig ntawm 2500 ℃;Piv nrog rau cov graphite zoo tib yam, nws cov qauv yog zoo thiab ntom, thiab nws cov uniformity yog zoo;Lub coefficient ntawm thermal expansion yog tsawg heev thiab muaj thermal shock kuj zoo heev;Isotropic;Muaj zog tshuaj tiv thaiv corrosion, zoo thermal thiab hluav taws xob conductivity;Nws muaj zoo heev mechanical processing kev ua tau zoo.
Nws yog qhov tseeb vim nws qhov kev ua tau zoo heev uas isostatic nias graphite yog dav siv hauv kev lag luam xws li metallurgy, chemistry, hluav taws xob, aerospace, thiab kev lag luam atomic zog.Ntxiv mus, nrog rau kev loj hlob ntawm science thiab technology, daim ntawv thov teb yog tas li nthuav.
Kev tsim cov txheej txheem ntawm isostatic nias graphite
Cov txheej txheem ntau lawm ntawm isostatic pressing graphite yog qhia nyob rau hauv daim duab 1. Nws yog pom tseeb tias cov txheej txheem ntawm isostatic nias graphite txawv ntawm cov graphite electrodes.
Isostatic nias graphite yuav tsum muaj cov khoom siv isotropic raw cov ntaub ntawv, uas yuav tsum tau muab tso rau hauv cov hmoov zoo.Txias isostatic nias txoj kev siv tshuab yuav tsum tau siv, thiab lub voj voog roasting ntev heev.Yuav kom ua tiav lub hom phiaj ceev, ntau lub impregnation roasting cycles yuav tsum tau, thiab lub voj voog graphitization ntev dua li ntawm cov graphite zoo tib yam.
Lwm txoj hauv kev los tsim cov isostatic nias graphite yog siv mesophase carbon microspheres ua raw cov ntaub ntawv.Ua ntej, cov mesophase carbon microspheres raug rau oxidation stabilization kev kho mob ntawm qhov kub thiab txias, ua raws li isostatic nias, tom qab ntawd ntxiv calcination thiab graphitization.Txoj kev no tsis tau qhia hauv kab lus no.
1.1 Cov khoom siv raw
The raw cov ntaub ntawv los tsim isostatic nias graphite muaj xws li aggregates thiab binders.Aggregates feem ntau yog tsim los ntawm roj av coke thiab asphalt coke, nrog rau hauv av asphalt coke.Piv txwv li, AXF series isostatic graphite tsim los ntawm POCO hauv Tebchaws Meskas yog tsim los ntawm av asphalt coke Gilsontecoke.
Txhawm rau kho cov khoom ua tau zoo raws li kev siv sib txawv, cov pa roj carbon dub thiab cov graphite yog siv los ua cov khoom siv ntxiv.Feem ntau, roj av coke thiab asphalt coke yuav tsum tau calcined ntawm 1200 ~ 1400 ℃ kom tshem tawm noo noo thiab volatile teeb meem ua ntej siv.
Txawm li cas los xij, txhawm rau txhim kho cov khoom siv dag zog thiab cov qauv ntom ntom ntawm cov khoom, kuj tseem muaj cov khoom siv ncaj qha ntawm isostatic nias graphite siv cov khoom siv raw xws li coke.Cov yam ntxwv ntawm coking yog tias nws muaj cov teeb meem tsis hloov pauv, muaj nws tus kheej sintering zog, thiab nthuav dav thiab sib cog lus synchronously nrog cov binder coke.Lub binder feem ntau siv cov thee tar suab, thiab raws li cov khoom siv sib txawv thiab cov txheej txheem kev xav tau ntawm txhua lub lag luam, qhov muag muag ntawm cov thee tar pitch siv li ntawm 50 ℃ txog 250 ℃.
Kev ua haujlwm ntawm isostatic nias graphite cuam tshuam zoo heev los ntawm cov khoom siv raw, thiab kev xaiv cov khoom siv raw yog qhov txuas tseem ceeb hauv kev tsim cov khoom kawg uas yuav tsum tau ua.Ua ntej pub mis, cov yam ntxwv thiab kev tsis sib xws ntawm cov khoom siv raw yuav tsum tau soj ntsuam nruj me ntsis.
1.2 Sib tsoo
Qhov loj me me ntawm isostatic nias graphite feem ntau yuav tsum ncav cuag qis dua 20um.Tam sim no, feem ntau refined isostatic nias graphite muaj qhov siab tshaj particle txoj kab uas hla ntawm 1 μ m.Nws yog nyias.
Txhawm rau muab cov coke sib xyaw ua ke rau hauv cov hmoov zoo li no, yuav tsum muaj lub tshuab ua kom zoo.Sib tsoo nrog qhov nruab nrab ntawm qhov loj me ntawm 10-20 μ Cov hmoov ntawm m yuav tsum tau siv lub tshuab ntsug ntsug, nrog qhov nruab nrab ntawm qhov me me ntawm tsawg dua 10 μ Cov hmoov ntawm m yuav tsum tau siv cov cua ntws grinder.
1.3 Mixing thiab kneading
Muab cov hmoov av thiab thee tar pitch binder nyob rau hauv kev faib ua feem rau hauv ib lub tshuab cua sov rau kneading, kom ib txheej ntawm asphalt yog tusyees adhered rau saum npoo ntawm cov hmoov coke hais.Tom qab kneading, tshem tawm cov muab tshuaj txhuam thiab cia nws txias.
Post lub sij hawm: Sep-27-2023