Daim ntawv thov Prospect Analysis Ntawm Hydraulic Alumina hauv Amorphous Refractories
Feb 14, 2023
Theoretical hauv paus
Hydraulic aluminaNyob rau hauv cov xwm txheej ntawm cov dej, tuaj yeem hydrated rau hauv ib lub gel, muaj kev sib raug zoo, hydraulic alumina ua ntej hydration ntawm cov qauv ntawm hydraulic alumina thiab raw khoom zoo ib yam li txhuas hydroxide, tab sis cov degree ntawm crystallization yog tsawg heev, hydration ntawm hydraulic alumina. yog ib hom tshuaj colloidal, kev sib xyaw ntawm cov khoom sib xyaw ua ke yog qhov sib xyaw ua ke, tsis tuaj yeem pom qhov ciam teb ntawm cov khoom me me, Nws qhia tau hais tias tom qab hydration, nws yog ib hom tshuaj colloidal, thiab qee cov kab nrib pleb yog tsim nyob rau saum npoo ntawm cov khoom. vim ziab thiab lub cev qhuav dej. Yog li ntawd, hydration thiab hardening khoom ntawm hydraulic alumina tuaj yeem siv los ua tus neeg sawv cev ntawm amorphous refractory.
Qhov zoo ntawm hydraulic alumina li binder
Nyob rau hauv daim ntawv cog lus siv los ntawm amorphous resistant cov ntaub ntawv, txhua daim ntawv cog lus muaj qee qhov zoo thiab qhov tsis zoo, tshwj xeeb tshaj yog nyob rau hauv kev siv cov impurity ntsiab lus qhia nyob rau hauv kev siv cov binders, muaj kev cuam tshuam zoo rau kev ua tau zoo ntawm cov ntaub ntawv refractory, xws li hauv kev qhia txog ib daim ntawv cog lus uas muaj calcium oxide, los ntawm Al2O3-SiO2-CaO, ntawm qhov kub thiab txias, CaO tuaj yeem cuam tshuam nrog Al2O3 thiab SiO2 hauv cov khoom los tsim ob lub ntsiab lus melting qis: anorthite (Cao-Al2O{{8 }}sio2, melting point 1553 degree) thiab anorthite (2CaO· Al2O3-sio2)
melting point 1593 degree). Rau cov txheej txheem multicomponent xws li Al2O3-SiO2-CaO- (Fe2O3, TiO2, Na2O, K2O, thiab lwm yam), cov kua theem tuaj yeem tshwm sim ntawm 1300 degree, kom lub zog thermal thiab load softening kub ntawm cov khoom yog txo. CaO kuj tuaj yeem ua rau cov hlau ua Fe2O3-CaO cov tebchaw, txo cov khoom kub ntawm cov khoom. Yog li, kev qhia txog calcium oxide yuav tsum tau txo qis hauv qee cov qib siab amorphous refractories, txhawm rau txhim kho qhov kub thiab txias ntawm cov refractories.
Lub hydrate tsim los ntawm hydraulic alumina tom qab hydration yog alumina hydrate. Thaum qhov kub thiab txias, alumina hydrate yuav dhau los ua cov txheej txheem ntawm lub cev qhuav dej thiab cov txheej txheem hloov mus rau theem, thiab thaum kawg tsim - alumina ruaj khov. -alumina nws tus kheej yog ib yam khoom siv refractory nrog kev ua tau zoo. Nyob rau tib lub sij hawm, txo cov tshuaj tiv thaiv yuav tsis tshwm sim, yog li nws yog ib hom amorphous refractory binder nrog kev loj hlob zoo.
