Magnesium oxide activation tsis ua hauj lwm cuam tshuam rau nws cov tshuaj lom neeg kev ua si, lub cev flowability, cov tshuaj tiv thaiv tus nqi, thiab stability ntawm cov khoom kawg, ua rau substandard kev ua tau zoo los yog txheej txheem tsis ua hauj lwm nyob rau hauv industrial daim ntaub ntawv.
1. Kev ua tshuaj lom neeg tsawg
Kev ua kom tsis ua haujlwm txhais tau hais tias cov ntsiab lus ntawm magnesium oxide yog<60%, failing to fully decompose Mg(OH)₂ into MgO; this directly weakens its reactivity with acids, magnesium chloride, and other reactants, affecting the gelation speed and strength development; in magnesium oxide boards and fireproof materials, this manifests as slow setting, low early strength, or even failure to harden.
Kev ua haujlwm tsis txaus cuam tshuam rau kev sib npaug ntawm cov qauv, xav tau ntau npaum li cas, nce nqi, thiab muaj peev xwm ua rau muaj kev phiv.
2. Kev ua kom lub cev tsis zoo
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Performance Indicators |
Failure Manifestations |
Qhov tshwm sim |
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Flowability |
Hmoov agglomeration, nyuaj pouring |
Kev ntsuas tsis raug, sib tov tsis sib xws, cuam tshuam rau kev pub mis |
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Dispersibility |
Particle aggregation, tsis zoo soluble nyob rau hauv cov kua theem |
Tsim ntawm "ntses ob lub qhov muag" los yog sediment nyob rau hauv slurry, cuam tshuam cov khoom uniformity |
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Hygroscopicity |
Qhov saum npoo tseem hydrophilic, yooj yim absorbs noo noo dua |
Shortened txee lub neej, pib hydration thaum thauj |
Lub cev tsis zoo ntawm lub cev ncaj qha cuam tshuam nrog cov txheej txheem tsim khoom, ua kom cov khoom siv tu ntau zaus thiab poob qis.
3. Cov txheej txheem thiab cov khoom ua tau zoo txaus ntshai
Hauv cov khoom siv hauv tsev (piv txwv li, magnesium oxide fireproof board):
Ua rau cov khoom efflorescence, tawg, deformation thiab tawg;
Txo cov dej tsis kam thiab ntev -lub sij hawm stability, shortening kev pab cuam lub neej.
Hauv thaj chaw tshuaj lom neeg thiab kev tiv thaiv ib puag ncig:
Thaum siv los ua tus neeg sawv cev desulfurizing, SO₂ nqus tau zoo txo qis dua 30%;
Thaum siv hauv kev kho dej khib nyiab, kev hloov pauv pH tsis muaj zog, xav tau ntau npaum li cas.
Raws li ib tug muab tub lim nyob rau hauv cov roj hmab thiab yas: tsis zoo reinforcing nyhuv, cuam tshuam vulcanization tus nqi thiab tiav cov khoom txhua yam khoom.
Zuag qhia tag nrho, qhov no ua rau cov nqi tsim khoom ntau dua, cov khoom seem ntau dua, thiab ntau cov neeg siv khoom tsis txaus siab.
4. Ntev - lub sij hawm cia txaus ntshai: Txawm hais tias unactivated magnesium oxide yog siv tau nyob rau hauv lub sij hawm luv luv, nws yuav maj mam hydrate thaum lub sij hawm cia vim cov seem ya raws thiab undecomposed Cheebtsam; tom qab ob peb lub lis piam, nws yuav caking thiab txo qis hauv kev ua si, ua rau cov khoom siv raw khoom pov tseg.
Nws raug nquahu kom kuaj xyuas cov dej num thiab cov dej noo ntawm txhua pawg ntawm cov khoom qhib kom ntseeg tau tias ua raws li HG / T 3928-2012 tus qauv.
