Dej iav yog kua thiab iav yog khoom.
1, cov khoom siv tseem ceeb ntawm iav yog SiO2, ntxiv rau lwm qhov yooj yim oxides, xws li Na2O, K2O, CaO, MgO; qee qhov lwm acidic oxides kuj siv tau los hloov qee qhov silica, xws li B2O3, P2O5 thiab hais txog.
2. Dej iav yog ib cov kua tau los ntawm leaching cov dej uas tau siv los ntawm siv quartz xuab zeb thiab sodium carbonate ntawm kev kub siab. Lub ntsiab tivthaiv yog Na2SiO3: SiO2 + Na2CO3 = Na2SiO3 + CO2
3. Dej iav yog tsuas yog pom tau los ntawm carbonization thiab lub cev qhuav dej crystallization, uas yog heev uas zoo sib xws rau txiv qaub. Cov dej iav tuaj yeem ua kom tawv nqaij los ntawm cov roj carbon dioxide, thiab cov xuab zeb hom yog qhov zoo tom qab tso. Cov dej iav limestone xuab zeb yog dav siv hauv casting steel, thiab qhov kom zoo dua yog qhov kev pheej hmoo ntawm silicosis tuaj yeem txo.
4. Ordinary iav yog txheej pob khoom. Tom qab txias, nws tiav niam txiv lub zog tawv tsis yog-crystalline silicate uas tsis yog-xim hlau. Nws lub ntsiab tivthaiv yog silica, uas yog dav siv nyob rau hauv cov tuam tsev.
