Yuav kom tiv thaiv tau qhov kev puas tsuaj ntawm corrosion los ntawm oxidation ntawm flake graphite ntawm qhov kub siab, nws yog ib qho tsim nyog los nrhiav cov khoom siv los muab ib lub tsho rau ntawm cov khoom kub siab, uas tuaj yeem tiv thaiv cov flake graphite los ntawm oxidation ntawm qhov kub siab. Txhawm rau nrhiav hom flake graphite anti-oxidation tsho tiv no, peb yuav tsum xub muaj qee yam ntxwv xws li kev tiv thaiv kub siab, kev sib xyaw zoo, kev ua haujlwm tiv thaiv corrosion zoo, muaj peev xwm tiv thaiv oxidation zoo thiab kev nyuaj siab. Cov neeg kho graphite Furuite hauv qab no qhia cov txheej txheem los tiv thaivgraphite flakelos ntawm kev oxidized ntawm qhov kub siab:
1. Siv cov ntaub ntawv uas muaj lub zog vapor tsawg dua 0.1333MPa (1650 ℃) thiab cov khoom zoo.
2. Xaiv cov khoom siv iav theem uas ua tau raws li qhov yuav tsum tau ua raws li cov khoom siv kaw tus kheej, thiab ua kom nws dhau los ua cov khoom siv kaw qhov tawg ntawm qhov kub ua haujlwm.
3. Raws li kev ua haujlwm ntawm lub zog dawb ntawm cov tshuaj tiv thaiv nrog oxygen nrog qhov kub thiab txias, ntawm qhov kub thiab txias ntawm steelmaking (1650-1750 ℃), cov ntaub ntawv uas muaj kev sib raug zoo rau oxygen ntau dua li carbon-oxygen raug xaiv los siv oxygen ua ntej, yog li ntawd kom oxidize lawv tus kheej thiab tiv thaivgraphite flake. Qhov ntim ntawm theem tshiab tsim tom qab oxidation yog loj dua li ntawm theem thawj, uas yog pab tau los thaiv cov channel diffusion sab hauv ntawm cov pa oxygen thiab tsim ib qho oxidation barrier.
4. Thaum lub sijhawm ua haujlwm kub, ntau cov khoom suav nrog Al2O3, SiO2 thiab Fe2O3 hauv cov hlau molten tuaj yeem raug adsorbed, uas cuam tshuam nrog lawv tus kheej rau sinter, yog li ntau yam khoom suav nrog los ntawm cov hlau molten maj mam nkag mus rau hauv txheej.
Furuite graphite ceeb toom peb tias qhov kub oxidation ntawm flake graphite hauv Suav teb cov cheeb tsam tseem ceeb yog 560815 ℃ thaum cov ntsiab lus carbon yog 88% 96% thiab qhov loj me ntawm cov khoom me me yog siab dua -400 mesh. Ntawm lawv, thaum qhov loj me ntawm graphite yog 0.0970.105mm, qhov kub oxidation ntawm graphite nrog ntau dua 90% cov ntsiab lus carbon yog 600815 ℃ thiab ntawm graphite nrog tsawg dua 90% cov ntsiab lus carbon yog 62075 ℃. Qhov ntau crystallinegraphite flakeyog, qhov kub siab dua ntawm qhov oxidation peak, thiab qhov oxidation weight poob tsawg dua ntawm qhov kub siab.
Lub sijhawm tshaj tawm: Lub Ib Hlis-19-2023