Kev tshawb nrhiav rau daim ntawv thov ntawm nano-carbon cov ntaub ntawv xws li graphene hauv refractories - PUDA graphite packing tshuab

2 Cov cawv ntawm nano-carbon cov khoom ntawm ntau cov roj carbon refractories

Cov pa roj carbon uas raug hais txog nyob rau hauv cov roj carbon uas muaj cov tshuaj refractories feem ntau yog graphite. Raws li cov nyiaj ntawm graphite, nws muab faib ua ntau cov roj carbon ntau refractories thiab qis-carbon refractories. Nws feem ntau ntseeg tias cov pa roj carbon monoxide muaj cov refractories nrog graphite cov ntsiab lus tsis siab dua 8% dhau los ua cov pa roj carbon monoxide qis, thiab cov roj carbon refractories muaj cov graphite cov ntsiab lus siab dua 8% dhau los ua cov roj carbon ntau refractories.

Cov kev tshawb fawb pom tau hais tias kev qhia tawm ntawm graphite tuaj yeem ua rau thermal poob siab thiab corrosion tsis kam ntawm cov khoom refractory. Txawm li cas los xij, yog tias muaj cov ntsiab lus graphite ntau dhau, oxidation tsis kam ntawm cov khoom refractory yuav dhau los. Graphite yuav cuam tshuam nrog huab cua thaum siv cov cua sov. Cov pa oxygen ua kom tsim cov pa roj carbon monoxide CO thiab cov pa roj carbon monoxide, uas ua rau lub qhov dej ntawm cov khoom refractory nce, txo qhov tsis kam tiv thaiv cov teebmeem ntawm cov ntaub ntawv refractory, thiab txo qhov kev pab cuam lub neej ntawm cov ntaub ntawv refractory; ntau cov pa roj carbon ntau hauv cov txheej txheem steelmaking, Nws yuav ua rau muaj cov pa roj carbon ntau nyob rau hauv cov hlau molten, uas yog ib qho kev cuam tshuam uas tsis yog qhov muaj txiaj ntsig zoo rau kev tsim cov khoom siv carbon hlau tsawg thiab cov hlau tsis huv; cov txheej txheem kem poob nrog cov txheej txheem ntau ntawm cov cua sov ploj, uas tsis yog txiaj ntsig rau lub zog txuag thiab emission txo nyob rau hauv cov txheej txheem steelmaking, thiab nce cov nqi tsim khoom ntawm steelmaking. Cov. Txawm li cas los xij, yog tias cov ntsiab lus graphite raug txo qis ib leeg, lub thermal poob siab thiab corrosion tsis kam ntawm cov khoom refractory yuav raug txo ntau. Nws tsis yog txiaj ntsig rau kev txuag ntawm refractory lub zog.

Cov pa roj carbon nanotubes thiab graphene hauv cov pa roj carbon nanomaterials tau pom thawj zaug xyoo 1991 thiab 2004, ua ntu zus. Vim hais tias ntawm lawv cov khoom tshwj xeeb, lawv tau nyiam cov kws tshawb fawb tau nyiam. Nyob rau tib lub sijhawm, lawv xav kom txhim kho cov neeg kho tshuab khoom ntawm cov pa roj carbon tsawg. Pa roj carbon qhov. Ntau tus kws tshawb fawb tau kawm txog kev cuam tshuam ntawm nano-carbon cov khoom ntawm lub zog ntawm cov ntaub ntawv refractory nyob rau hauv cov ntsiab lus ntawm cov roj carbon ntau, thiab tau txais ntau cov txiaj ntsig. Piv txwv, Zhu et al. siv cov roj carbon nanotubes rau qee feem lossis tag nrho hloov flake graphite thiab siv tib txheej txheem kev npaj los npaj cov calcium-carbon refractories. , Thiab kawm txog qhov sib txawv ntawm cov microstructure, cov cuab yeej siv, thiab thermal shock tsis kam ntawm magnesia-carbon refractories nrog carbon nanotubes ua cov pa roj carbon ntau thiab flake graphite raws li cov pa roj carbon ntau. Cov kev sim qhia pom tias thaum cov roj carbon nanotubes tau siv los ua cov khoom siv carbon thiab sintered ntawm 1000 ° C thiab 1400 ° C, lawv pom cov khoom siv lub zog siab dua li cov graphite carbon source. Cov txiaj ntsig no qhia tau hais tias cov roj carbon nanotubes tau siv los ua cov pa roj carbon roj los txuas ntxiv rau cov khoom lag luam magnesia-carbon refractory. Cov magnesia-carbon refractory cov khoom tuaj yeem ua kom muaj zog thiab sib zog. Rau qhov sib piv ntawm lub thermal poob siab tsis kam ntawm magnesia-carbon refractories, nws tseem qhia tau zoo dua li flake graphite. Lub thermal poob siab tsis kam ntawm magnesia-carbon refractories nrog 5% carbon nanotubes yog sib npaug rau ntawm magnesia-carbon refractories nrog 10% flake graphite.

QinghuWang li al. npaj Al2O3-C refractories uas muaj graphene oxide nanosheets (GONs) nrog txhuas, silicon thiab SiO2 ua cov ntxiv. Cov txiaj ntsig tau pom tias piv nrog Al2O3-C refractories tsis muaj GONs, Al2O3-C refractories doped nrog GONs Cov khoom siv' s ib txwm kub modulus ntawm kev sib tawg (CMOR), flexural modulus (E), quab yuam thiab hloov chaw nkhaus thiab lwm yam khoom muaj zog tau ua kom zoo dua. Qhov kev txhim kho no tau yog vim muaj qhov ua kom muaj zog ntawm GONs ntawm 800 ℃ thiab cov khoom sib zog ua ke nrog graphite plaub ya ri thiab nyob rau hauv-situ whisker tsim ntawm 1000 ~ 1400 ℃. Rooj 1 qhia txog cov ntaub ntawv tshwj xeeb ntawm kev sim.

Cov lus 1 Chav sov ua kom tawg qauv thiab flexural modulus ntawm cov nqi sib txawv ntawm graphene oxide nanosheet kuaj raug rho tawm haujlwm ntawm qhov kub sib txawv

Tianbin Zhu li al. kawm txog kev cuam tshuam ntawm graphite oxide nanosheets (GONS), cov pa roj carbon nanotubes (CNT) thiab cov pa roj carbon dub (CB) ntawm cov kev hloov microstructure, cov khoom siv kho tshuab thiab cov thermomechanical thaj chaw ntawm magnesia-carbon refractories. Nws yog muab piv nrog cov tsoos magnesia-carbon refractories uas muaj 10% flake graphite npaj raws li cov xwm txheej qub. Vim hais tias ntawm lub hav zoov ntawm nano-carbon thiab lub in-situ tsim ntawm tej hub theem nyob rau hauv MA. Cov pa roj carbon nanotube uas muaj cov khoom siv muaj qhov kub txias dua ntawm cov khoom tawg tom qab coking ntawm 1000 ° C thiab 1400 ° C, thiab ntxiv ntawm nanocarbon txhim kho lub thermal poob siab ua haujlwm ntawm cov khoom siv.

AtulVMaldhure li al. siv npib tsib xee nitrate ua catalyst thiab phenolic resin ua tus binder los kawm txog cov nyhuv ntawm hauv-synthesis ntawm carbon nanotubes ntawm cov khoom ntawm magnesium-aluminium-carbon refractories. Kev sim qhia tau hais tias 3% npib tsib xee nitrate tuaj yeem hloov kho qhov kev hloov kho thiab cov qauv txheej txheem ntawm phenolic resin nyob rau hauv cov txheej txheem kev kho cua sov los ua cov pa roj carbon nanotubes, thiab cov hluavtaws hauv cov pa roj carbon nanotubes txhim kho cov cuab yeej muaj zog ntawm magnesium-aluminium-carbon refractory khoom. Kev ntsuas lub zog ntawm chav sov yog 800 ℃, 1000 ℃, 1200 ℃ thiab 1400 ℃ tau nce li 10.15%, 30.75%, 41.09%, 25.62% feem. Nyob rau tib lub sijhawm, lub ntim ntom ntom ntom ntawm cov khoom nce thiab cov kab ntim tsawg dua, uas ua rau muaj kev txhim kho ntxiv ntawm oxidation tsis kam ntawm cov khoom siv magnesium-aluminium-carbon refractory.

Guo Wei li al. siv ferrocene ua catalyst thiab phenolic resin ua tus binder los kawm txog cov nyhuv ntawm ferrocene ntxiv rau kev ua haujlwm ntawm txhuas-carbon refractories. Cov kev sim pom tau hais tias qhov sib ntxiv ntawm ferrocene yuav tsum nyob rau thaj tsam ntawm 0-2%, tshwj xeeb tshaj yog Tom qab kho cua sov ntawm 1000 ° C, nws muaj txiaj ntsig zoo los txhim kho cov neeg kho tshuab ntawm cov khoom, thiab vim tias ntxiv ntawm ferrocene catalyzes phenolic cob. nyob rau hauv cov txheej txheem kev kho cua sov, sab hauv cov khoom tsim cov pa roj carbon nanomaterials nyob rau hauv situ, thiab cov pa roj carbon nanomaterials tsim nyob rau hauv situ pab nws nti nrog cov khoom ntxiv Si los tsim β-SiC cov khaub thuas, uas ntxiv txhim kho lub zog ntawm cov txhuas-carbon refractory. Txawm li cas los xij, qhov txuas ntxiv ntawm catalyst tsis tuaj yeem hloov lub zog oxidation ntawm aluminium-carbon refractories.

Hauv cov ntsiab lus ntawm ntau cov pa roj carbon ntau, cov cuab yeej lub zog ntawm cov ntaub ntawv refractory tuaj yeem txhim kho tsis muaj teeb meem txawm tias cov pa roj carbon nanomaterials tau ncaj qha ntxiv lossis cov pa roj carbon nanomaterials tau sib txuas nrog hauv situ. Tom qab kho cua sov, graphite thiab nano-carbon cov ntawv sib koom ua ke txhim kho cov neeg kho tshuab cov yam ntxwv ntawm cov ntaub ntawv refractory. Thaum qee yam antioxidant ntxiv rau cov khoom lag luam refractory, cov khoom siv nano-carbon ntau dua yuav cuam tshuam nrog cov nplawm ceramic uas muaj qee yam khoom siv antioxidant, thiab ntxiv txhim kho cov khoom refractory. lub tawv tawv. Vim tias muaj qee yam tsis xws luag hauv nano-carbon cov ntaub ntawv, oxidation thiab cov txheej txheem kev hloov pauv tau tshwm sim, uas ua rau nano-carbon cov khoom siv tsis tuaj yeem hloov hloov graphite ua cov pa roj carbon ntau nyob rau hauv keeb kwm yav dhau los cov roj carbon ntau, thiab cov txiaj ntsig ntawm hloov qee tus Graphite uas yog cov pa roj carbon ntau yog zoo heev.

Txawm li cas los xij, nyob rau hauv keeb kwm yav dhau los ntawm cov roj carbon ntau, thaum cov pa roj carbon nanomaterials tau ncaj qha ntxiv, kev tshawb fawb ntawm cov qauv hloov qauv ntawm cov pa roj carbon nanomaterials nrog qhov nce ntawm qhov kub tseem tseem tsis pom tseeb, tshwj xeeb tshaj yog thaum kub siab tshaj 1400 ℃, kev tshawb fawb tsis tau muab kev koom tes ntau dhau. Hauv cov huab cua sib txawv, xws li lub zog ntawm oxidizing cua thiab txo qhov huab cua ntawm cov khoom siv nano-carbon, cov kev tshawb fawb saum toj no tsis tau ua cov kev tshawb fawb tshwj xeeb. Cov txheej txheem ntawm kev qhia cov khoom siv nano-carbon los ntawm cov txheej txheem nthuav dav tuaj yeem ua kom muaj kev cuam tshuam cov pob zeb sib xyaw ntawm cov ceramic whiskers rau qee yam, thiab nws xav tau kev sib tham ntxiv

PUDA valve lub hnab ntim tshuab rau graphite hmoov:

ntsia hlau bagging tshuab

ntau cov hmoov ntau cov ntaub ntawv thiab cov hmoov ntau yog 0.1-0.5T / m³
xws li lub teeb calcium carbonate, dub thiab dawb carbon, graphite thiab kaolin, thiab lwm yam