Khoom Description: graphite
Graphite hmoov yog mos, dub grey, greasy thiab tuaj yeem ua qias neeg daim ntawv. Lub hardness yog 1-2, thiab nce mus rau 3-5 nrog kev nce ntawm impurities raws txoj kab ntsug. Lub ntiajteb txawj nqus yog 1.9-2.3. Nyob rau hauv cov xwm txheej ntawm kev sib cais oxygen, nws cov ntsiab lus melting yog siab dua 3000 ℃, uas yog ib qho ntawm cov khoom siv kub tshaj plaws. Nyob rau hauv chav tsev kub, cov khoom ntawm graphite hmoov yog qhov ruaj khov, insoluble hauv dej, dilute acid, dilute alkali thiab organic solvents; cov khoom muaj kub tsis kam thiab conductivity, thiab yuav siv tau raws li refractory, conductive khoom, hnav-resistant thiab lubricating khoom.
Vim nws cov qauv tshwj xeeb, graphite muaj cov yam ntxwv hauv qab no: 1. Kev kub siab ua haujlwm: lub melting point ntawm graphite yog 3850 ± 50 ℃, thiab boiling point yog 4250 ℃. Uas yog hais tias, qhov poob phaus tus nqi thiab coefficient ntawm thermal expansion yog me me heev thaum siv ultra-siab kub arc sintering, thiab lub zog ntawm graphite nce nrog qhov kub thiab txias. Thaum 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 me ntawm kev sib txhuam coefficient yog, thiab qhov zoo ntawm lubrication kev ua tau zoo. 3. Chemical stability: graphite muaj tshuaj zoo stability ntawm chav tsev kub, resistant rau acid, alkali thiab organic hnyav corrosion. 4. Plasticity: graphite muaj qhov zoo toughness thiab tuaj yeem nias rau hauv cov ntawv nyias. 5. Thermal shock resistance: thaum graphite siv nyob rau hauv chav tsev kub, nws tuaj yeem tiv taus qhov kub thiab txias tsis muaj kev puas tsuaj. Thaum qhov kub nce siab tam sim ntawd, qhov ntim ntawm graphite yuav tsis hloov pauv zoo heev thiab yuav tsis muaj qhov tawg.
Kev siv:
1. Raws li cov khoom siv refractory: graphite thiab nws cov khoom muaj cov yam ntxwv ntawm qhov kub thiab txias tsis kam thiab siab zog. Lawv tsuas 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 steel ingot thiab metallurgical furnace hauv ob sab phlu.
2. Raws li hnav-resistant lubricating khoom: graphite feem ntau yog siv los ua lubricant hauv kev lag luam machinery. Lubricating roj feem ntau tsis haum rau kev kub ceev, siab kub thiab siab siab.
3. Graphite muaj tshuaj ruaj khov zoo. Nws yog dav siv nyob rau hauv petrochemical kev lag luam, hydrometallurgy, acid-base ntau lawm, hluavtaws fiber, papermaking thiab lwm yam sectors, uas yuav txuag tau ntau ntawm cov ntaub ntawv hlau.
4. Graphite tuaj yeem siv los ua xaum xaum, xim thiab polishing tus neeg sawv cev. Tom qab kev ua haujlwm tshwj xeeb, graphite tuaj yeem ua rau ntau yam khoom siv tshwj xeeb rau kev siv los ntawm cov tuam tsev muaj feem cuam tshuam.
Post lub sij hawm: Mar-26-2021