Cov lus piav qhia txog khoom: graphite
Hmoov graphite yog mos, xim dub, roj thiab tuaj yeem ua rau daim ntawv qias neeg. Qhov nyuaj yog 1-2, thiab nce mus txog 3-5 nrog rau kev nce ntawm cov khoom tsis huv raws txoj kab ntsug. Lub zog tshwj xeeb yog 1.9-2.3. Nyob rau hauv qhov xwm txheej ntawm kev rho tawm oxygen, nws lub ntsiab lus yaj yog siab tshaj 3000 ℃, uas yog ib qho ntawm cov zaub mov uas tiv taus kub tshaj plaws. Ntawm chav tsev kub, cov khoom siv tshuaj lom neeg ntawm hmoov graphite yog qhov ruaj khov, tsis yaj hauv dej, dilute acid, dilute alkali thiab cov kuab tshuaj organic; cov khoom siv muaj kev tiv taus kub thiab conductivity siab, thiab tuaj yeem siv ua cov khoom siv refractory, conductive, hnav-resistant thiab lubricating.
Vim nws cov qauv tshwj xeeb, graphite muaj cov yam ntxwv hauv qab no: 1. Kev tiv taus kub siab: lub ntsiab lus yaj ntawm graphite yog 3850 ± 50 ℃, thiab lub ntsiab lus kub yog 4250 ℃. Uas yog hais tias, qhov hnyav poob thiab coefficient ntawm thermal expansion yog me me heev thaum siv ultra-high temperature arc sintering, thiab lub zog ntawm graphite nce nrog rau qhov nce ntawm qhov kub. Ntawm 2000 ℃, lub zog ntawm graphite yog ob npaug. 2. Lubricity: lubricity ntawm graphite nyob ntawm qhov loj ntawm graphite. Qhov loj dua qhov ntsuas yog, qhov me dua qhov sib txhuam coefficient yog, thiab qhov zoo dua qhov kev ua tau zoo ntawm lubrication yog. 3. Kev ruaj khov tshuaj lom neeg: graphite muaj kev ruaj khov tshuaj lom neeg zoo ntawm chav tsev kub, tiv taus acid, alkali thiab organic solvent corrosion. 4. Plasticity: graphite muaj toughness zoo thiab tuaj yeem nias rau hauv cov ntawv nyias. 5. Kev tiv thaiv thermal poob siab: thaum graphite siv ntawm chav tsev kub, nws tuaj yeem tiv taus qhov hloov pauv ntawm qhov kub yam tsis muaj kev puas tsuaj. Thaum qhov kub nce siab tam sim ntawd, qhov ntim ntawm graphite yuav tsis hloov pauv ntau thiab yuav tsis muaj kab nrib pleb.
Siv:
1. Ua cov khoom siv refractory: graphite thiab nws cov khoom muaj cov yam ntxwv ntawm kev tiv taus kub thiab lub zog siab. Lawv feem ntau yog siv rau kev tsim khoomgraphite cruciblehauv kev lag luam metallurgical, thiab feem ntau yog siv los ua tus neeg sawv cev tiv thaiv rau cov hlau ingot thiab cov khoom siv hluav taws xob metallurgical.
2. Ua cov khoom siv roj nplua nyeem uas tsis yooj yim hnav: graphite feem ntau siv ua roj nplua nyeem hauv kev lag luam tshuab. Cov roj nplua nyeem feem ntau tsis haum rau kev kub ceev, kub heev thiab siab.
3. Graphite muaj kev ruaj khov tshuaj zoo. Nws yog dav siv hauv kev lag luam petrochemical, hydrometallurgy, acid-base production, synthetic fiber, papermaking thiab lwm yam kev lag luam, uas tuaj yeem txuag tau ntau cov khoom siv hlau.
4. Graphite siv tau ua tus cwj mem, xim thiab tus neeg sawv cev txhuam. Tom qab ua tiav tshwj xeeb, graphite tuaj yeem ua rau ntau yam khoom siv tshwj xeeb rau cov chaw haujlwm lag luam siv.
Lub sijhawm tshaj tawm: Lub Peb Hlis-26-2021