Daim ntawv thov ntawm Silica fume Powder hauv Low Cement Castable
Apr 10, 2023
Daim ntawv thov ntawm Silica fume Powder hauv Low Cement Castable
Borida Microsilica hmoov yog dav siv nyob rau hauv cov ntaub ntawv refractory. Nyob rau hauv cov ntaub ntawv amorphous refractory, microsilica hmoov yog tsuas yog siv los sau, txhim kho rheological khoom ntawm cov ntaub ntawv, txhim kho cov khoom siv zog, hnav tsis kam, thiab yaig kuj.
Nyob rau hauv ib txwm aluminate cement ua ke refractory hauv ob sab phlu castables, tus nqi ntawm cov cement feem ntau yog 12 feem pua rau 30 feem pua, thiab cov dej yog 9 feem pua rau 13 feem pua. Kev siv dej yog siab, lub castable muaj ntau qhov pores, thiab lub zog tsawg; Cov cement noj yog loj, txawm hais tias siab txaus kub lub zog tuaj yeem tau txais, tab sis qhov nruab nrab kub lub zog yog pom tseeb vim yog siv lead ua hloov pauv ntawm calcium aluminate. Nyob rau tib lub sijhawm, 3 feem pua 10 feem pua CaO coj nyob rau hauv reacts nrog SiO2 thiab Al2O3 nyob rau hauv cov khoom xyaw los tsim low-melting anorthite (CAS2) los yog calcium-aluminium-feldspar (C2AS), uas ua rau poob rau hauv high-temperature zog thiab erosion tsis kam.
Txhawm rau kov yeej qhov tsis zoo ntawm cov lus hais saum toj no ntawm cov tsoos castables, ib tiam tshiab ntawm refractory castables - qis cement series castables tau tsim los ntawm kev siv cov tshuab silicon micropowder. Xws li cov cement castables tsawg (LCC), ultra-low cement castables (ULCC) thiab tsis muaj cement castables (NCC). Kev sib xyaw ua ke ntawm silica hmoov thiab cov khoom siv ua haujlwm siab yog cov thev naus laus zis tseem ceeb ntawm qis cement series castables. Nyob rau hauv LCC, nrog rau qhov tsim nyog particle gradation, silica micropowder muaj fluidity zoo dua thiab yuav luag tag nrho cov khoob ntawm cov ntsiab lus, yog li cov cement tuaj yeem txo qis dua 8 feem pua. Tus nqi ntawm cov dej yog txo mus rau 5 feem pua mus rau 7 feem pua, thiab cov castable muaj cov qauv ntom ntom, tsis muaj porosity, siab zog, hnav tsis kam thiab corrosion kuj. Daim duab 1 yog kev sib piv ntawm lub zog ntawm LCC thiab tsoos castables.
