Cov ncauj lus kom ntxaws technical parameters ntawm micro-silica hmoov
Aug 23, 2024
Silica Fume - Kuj tseem hu ua Microsilica lossis Ultrafine Silica Powder
Txhim kho pob zeb nrog Silica Fume
Silica fume txhim kho lub zog compressive, impermeability, thiab durability ntawm pob zeb, ua rau nws yog ib qho tseem ceeb ntawm cov khoom siv hauv tsev.
Lub cev thiab tshuaj muaj zog ntawm Silica Fume
Silica fume, grey ultrafine hmoov, muaj qhov tshwj xeeb ntawm thaj chaw loj thiab muaj kev ua haujlwm siab, pab txhawb kev txhim kho ntawm cov ntaub ntawv cementitious.
Kev siv dav ntawm Silica Fume hauv kev tsim kho
Silica fume yog siv nyob rau hauv ntau yam kev siv pob zeb, nrog rau cov pob zeb muaj zog, kev ua haujlwm ntawm tus kheej, thiab cov cam khwb cia refractory, los txhim kho cov khoom siv thiab txuas ntxiv kev pab cuam lub neej.
Silica fume yog ib hom ultrafine silicon-raws li hmoov cov khoom tsim los ntawm oxidation ceev thiab condensation ntawm SiO2 thiab Si gases nrog oxygen nyob rau hauv cov huab cua thaum lub sij hawm smelting ntawm ferrosilicon alloy thiab industrial silicon.
I. Lub cev thiab tshuaj lom neeg ntawm Silica Fume:
Qhov tshwm sim: Silica fume tshwm raws li cov hmoov grey lossis dawb dawb nrog refractoriness ntawm 1600 degree. Qhov ceev: 200-250 kg / m³ Cov tshuaj muaj pes tsawg leeg ntawm silica fume yog qhia nyob rau hauv cov lus hauv qab no:
| Cheebtsam | SiO 2 | Al2O3 | Fe2O 3 | MgO | CaO | NaO | pH |
|---|---|---|---|---|---|---|---|
| Nruab nrab | 75–96% | 1.0±0.2% | 0.9±0.3% | 0.7±0.1% | 0.3±0.1% | 1.3±0.2% | Nruab nrab |
Kev zoo: Tshaj 80% ntawm silica fume hais tsawg dua 1 micron loj, nrog qhov nruab nrab particle txoj kab uas hla ntawm 0.1-0.3 microns, thiab thaj chaw tshwj xeeb ntawm 20-28 m² / g . Qhov zoo thiab qhov chaw tshwj xeeb ntawm silica fume yog kwv yees li 80-100 npaug ntawm cov cement thiab 50-70 npaug ntawm cov tshauv ya. Feem ntau quartz hmoov specifications muaj xws li 400 mesh, 800 mesh, 1000 mesh, 1500 mesh, thiab 2000 mesh.
Particle Morphology thiab Mineral Structure: Thaum lub sij hawm nws tsim, silica fume undergoes ib theem hloov thiab, vim nto nro, tsim amorphous spherical hais nrog du nto. Qee cov khoom tuaj yeem sib sau ua ke rau hauv pawg ntawm ntau tus kheej kheej kheej. Nws yog cov khoom siv pozzolanic nrog thaj chaw loj tshwj xeeb thiab muaj kev ua haujlwm siab. Cov me me kheej kheej hauv silica fume tuaj yeem muab cov nyhuv lubricating thaum sib xyaw nrog lwm cov ntaub ntawv.
II. Kev ua haujlwm ntawm Silica Fume:
Silica fume tuaj yeem sau cov voids ntawm cov cement hais thiab hnov mob nrog cov khoom siv dej los tsim cov gel. Nws kuj reacts nrog alkaline cov ntaub ntawv xws li magnesium oxide los tsim ib gel. Thaum ntxiv rau cov cement-based pob zeb, mortar, thiab refractory castables, qhov tsim nyog ntawm silica fume tuaj yeem ua tiav cov teebmeem hauv qab no:
Qhov tseem ceeb txhim kho compressive zog, flexural zog, impermeability, corrosion kuj, cuam tshuam tsis kam, thiab abrasion kuj.
Txhim khu kev tuav dej, tiv thaiv kev sib cais thiab los ntshav, thiab txo cov pob zeb ua haujlwm tsis zoo.
Qhov tseem ceeb txuas ntxiv lub neej kev pab cuam ntawm pob zeb. Nyob rau hauv ib puag ncig hnyav xws li tshuaj tua kab mob chloride, sulfate nres, thiab cov av noo siab, qhov ua tau zoo ntawm cov pob zeb tuaj yeem nce los ntawm ib mus rau ob peb zaug.
Zoo heev txo cov rebound nyob rau hauv shotcrete thiab castable, thiab ua rau kom lub thickness ntawm ib txheej txheej.
Nws yog ib qho tseem ceeb ntawm cov pob zeb muaj zog, nrog rau kev siv hauv C150 pob zeb ua haujlwm.
Silica fume muaj kwv yees li tsib npaug ntawm kev ua haujlwm ntawm cov cement; nws siv hauv cov pob zeb zoo tib yam thiab cov cement castables tsawg tuaj yeem txo cov nqi thiab txhim kho cov kav ntev.
Zoo tiv thaiv alkali-silica cov tshuaj tiv thaiv hauv pob zeb.
Txhim kho qhov ceev ntawm castable refractory khoom. Thaum sib koom ua ke nrog Al2O3, nws yooj yim dua tsim cov theem mullite, txhim kho lub zog kub thiab thermal poob siab.
III. Siv tau ntau yam:
Muaj feem xyuam rau kev lag luam pob zeb, muaj zog ua vaj tse, tus kheej-leveling pob zeb, refractory castables, qhuav mix (premixed) mortar, high-strength non-shrink grouting khoom, hnav-resistant industrial floors, kho mortars, polymer mortars, insulating mortars, impermeable qhob, qhob densifiers, qhob corrosion inhibitors, cement-based polymer waterproofing agents; raws li kev txhawb zog hauv cov roj hmab, yas, tsis muaj polyester, xim, txheej, thiab lwm yam ntaub ntawv polymer; thiab hauv kev hloov kho cov khoom siv ceramic, nrog rau lwm yam kev siv.
