... Metallurgy: The raw materials, additives or flux of silicon metal, silicon ferroalloy and silicon aluminium alloy,etc. Building: Concrete, glue congeal material, ... standard sand),etc. Chemical industry: Raw materials of silicon compound and water glass,etc., the filler in the ... paper, abrasive paper, emery cloth etc.). Electron: Metal silicon of high strength, use the optic fibre in communication,etc ...