Degraded magnesium oxide tsis tuaj yeem rov ua kom tiav vim tias qhov tshwm sim magnesium hydroxide (Mg (OH) ₂) yog ib qho khoom siv tsis tau. Txawm li cas los xij, nws txoj haujlwm tuaj yeem rov qab los ntawm ib nrab los ntawm kev kub siab -calcination, haum rau cov ntaub ntawv degraded me ntsis.
1. Siab -Calcination Method: Tsawg Reactivation
Cov xwm txheej siv tau: Tsuas yog siv tau rau nruab nrab degraded magnesium oxide (surface hydration, me ntsis agglomeration);
Reaction Principple: Mg(OH)₂ → ΔMgO + H₂O↑ Magnesium hydroxide decomposes ntawm qhov kub thiab txias, regenerating magnesium oxide;
Kev khiav hauj lwm Parameter:
Kub: 500-800℃(tsis txhob sintering hauv qab 800 degree);
Lub sij hawm: 2-4 teev, kom lub cev qhuav dej txaus;
Khoom siv: Muffle furnace lossis rotary kiln, zoo -ventilated;
Tom qab-kev kho mob:
Txias ib txwm mus rau chav sov tom qab calcination;
Sieve (80-100 mesh) tshem tawm impurities;
Tam sim ntawd kaw lub ntim kom tiv thaiv kev nqus noo noo theem ob.
Tom qab qhov kev kho mob no, qhov kev ua haujlwm tuaj yeem rov qab los rau 70% -85% ntawm nws cov nqi qub, tab sis qhov tshwj xeeb ntawm thaj chaw thiab cov tshuaj tiv thaiv tseem qis dua li cov tshiab, muaj zog MgO.
2. Kev ntsuas qhov cuam tshuam rau kev ua haujlwm
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Qhov taw qhia |
Lub Hom Phiaj Rov Qab |
Txoj kev kuaj xyuas |
|
Active Magnesium Oxide Cov ntsiab lus |
Ntau dua lossis sib npaug li 60% |
Hydration Method (HG/T 3928-2012) |
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Cov ntsiab lus noo noo |
Tsawg dua lossis sib npaug li 1.5% |
Karl Fischer Method lossis Drying Loss Method |
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Flowability |
Loose Powder |
Kev soj ntsuam pom pom + Pour Test Nws raug nquahu kom xa cov qauv mus rau CNAS- qhov chaw kuaj pom zoo kom tau txais cov ntaub ntawv pov thawj los xyuas kom meej tias cov ntawv thov tau ua tiav. |
3. Cov xwm txheej uas ua kom tsis muaj peev xwm (Tsis txhob sim)
Hardened, zoo li pob zeb: Sab hauv yog hydrated heev thiab nyuaj rau decompose kiag li thaum calcination;
Contains carbonate impurities (such as MgCO₃): Requires higher temperatures (>900 degree) rau decomposition, yooj yim ua rau sintering deactivation;
Siv nyob rau hauv siab - thaj chaw muaj tseeb (xws li hluav taws xob thiab tshuaj): Txawm tias ib nrab rov qab los, tseem muaj kev pheej hmoo ntawm kev ua haujlwm hloov pauv.
Kev quab yuam siv cov ntaub ntawv qhib tuaj yeem ua rau cov khoom tawg, lub zog tsis txaus, lossis cov tshuaj tiv thaiv tsis tau.
4. Lwm Cov Lus Pom Zoo: Ua ntej siv cov peev txheej. Yog tias tus nqi ua kom siab siab lossis cov txiaj ntsig tsis txaus siab, nws raug nquahu kom hloov mus rau qhov tsis yog - cov ntawv thov tseem ceeb xws li kev txhim kho kev ua liaj ua teb thiab ib puag ncig desulfurization los hloov pov tseg rau hauv cov khoom muaj nqis.
Cov Lus Qhia Txog Kev Nyab Xeeb: Cov txheej txheem calcination yuav tsum tau ua nyob rau hauv ib qho chaw zoo -ventilated ib puag ncig. Hnav cov khoom tiv thaiv thiab tsis txhob nqus plua plav.
