Txhab graphite, tseem hu ua vermicular graphite, yog cov ntaub ntawv crystalline, yog cov qauv siv hluav taws xob uas tsis muaj roj ntsha thiab sib xyaw nrog cov pa roj carbon monoxide Nws tsis yog tswj cov khoom siv lub cev thiab tshuaj lom neeg zoo, xws li kub thiab duab xoo hluav taws xob, xoo hluav taws xob thiab gramma-ray ntev-ntev ntev ntev. Nws tseem muaj cov khoom siv lub cev thiab tshuaj zoo, xws li kev sib txhuam qis qis, lubrical zoo, thiab thermal conductivity, thiab aniisotropy. Ntxiv mus, vim kev sib cuam tshuam ntawm cov khoom siv sib npaug thiab cov khoom siv graphite tsis muaj, thiab kov yeej cov kab ke brittleness thiab kev cuam tshuam ntawm ntuj graphite. Cov hauv qab no cov neeg tua kab ke graphite qhia qhia cov kev qhia ntawm cov kev lag luam synthesis cov txheej txheem thiab siv ntawm kev nthuav dav graphite:
1. Cov qauv hluavtaws feem ntau siv hauv kev lag luam
①chemical oxidation
Cov txiaj ntsig zoo: Tshuaj lom neeg oxidation yog siv dav thiab tsim qauv zoo qauv hauv kev lag luam. Yog li ntawd, nws tau pom tseeb zoo, paub tab siv ntxias thiab tus nqi qis.
Qhov tsis zoo: Cov neeg sawv cev sib txuam yog feem ntau muaj cov sulfuric acid, uas siv ntau cov kua qaub loj. Muaj cov pa roj ntsha muaj kuab phom nyob rau hauv cov txheej txheem ntau lawm, thiab seem nyob rau hauv cov khoom kuj correch cov khoom siv.
②electrrochemical oxidation
Xws li cov tshuaj oxidation, nws yog ib qho ntawm cov kev lag luam hluavtaws rau cov hluavtaws nthuav dav.
Qhov zoo: Tsis tas yuav ntxiv cov oxidants muaj zog, xws li muaj zog acids, thiab cov tshuaj tiv thaiv tuaj yeem tswj hwm los ntawm kev kho tsis xws li thiab voltage. Cov cuab yeej hluavtaws yooj yim, tus nqi hluavtaws loj, cov electrolyte tsis yog kuab paug tsis huv, thiab tuaj yeem siv tau.
Qhov tsis zoo: qhov ruaj ntseg ntawm cov khoom lag luam tsis zoo dua lwm cov hau kev, uas xav tau ntau yam khoom uas cuam tshuam rau cov khoom lag luam zoo. Qee zaum, nthuav dav ntim ntawm cov khoom yog zoo heev txo vim qhov nce nyob rau hauv qhov kub kub. Tsis tas li ntawd, muaj cov kev tawm tsam sab hauv cov kev daws teeb meem aqueous, yog li nws yog qhov nyuaj kom tau txais cov kev txiav txim thawj zaug.
2. Cov lag luam loj tsim thiab muaj peev xwm ntau lawm
Kev tsim khoom ntawm cov khoom lag luam graphite nyob rau hauv kuv lub teb chaws tau loj hlob ntawm theem pib rau ntau dua 100,000 tons, thiab kev ua lag luam muaj txiaj ntsig yog tsawg. Tsis tas li, feem ntau cov tuam ntxhab feem ntau yog cov file-kawg filers, tsis tshua muaj siv nyob rau hauv Automotive Ntsaws Teeb thiab Nuclear Aviation Teeb. Txawm li cas los xij, nrog rau kev txhim kho cov thev naus laus zis hauv tsev, cov feem ntawm cov khoom lag luam high-kawg yuav maj mam nce.
3. Kev xav tau lag luam thiab kev kwv yees ntawm cov ntaub ntawv sealing
Tam sim no, nthuav graphite feem ntau yog siv los ua cov khoom siv hluav taws xob tsheb, thiab lwm yam. Txuas cov khoom lag luam graphite, thiab lwm yam. Cov ntaub ntawv tshwj xeeb yog siv los ua cov filling fillers. Tam sim no, nthuav graphite nrog cov ntsiab lus carbon qis tau tsim, yog li hloov asbestos ntawm qhov ntsuas loj thiab nce ntxiv. Ntawm qhov tod tes, yog tias yas, roj hmab thiab cov ntaub ntawv hlau sealing tuaj yeem yog ib feem ntawm kev hloov kho graphite sanding yuav loj dua.
Nyob rau hauv lub tsheb kev lag luam, txhua tus tsav lub tog raj kheej gasket, huab cua nkag thiab kev tso pa tawm thiab txhua txhua 10,000 lub tsheb xav tau 20 ~ 100 tons ntawm cov duab txuas ntxiv. Tuam Tshoj lub tsheb kev lag luam tsheb tau nkag mus rau lub sijhawm ntawm kev loj hlob sai. Yog li ntawd, kuv lub teb chaws thov kom nthuav cov ntaub ntawv graphite sanding yog tseem muaj lub hom phiaj heev.
Lub Sijhawm Post: Sep-07-2022