Pilkington浮法玻璃生产介绍.ppt

Application of Inorganic Chemistry in Industry Flat Glass and Coatings On Glass Dr Troy Manning Advanced Technologist, On-line Coatings Pilkington European Technical Centre Hall Lane Lathom UK troy.manning@ Outline Global Flat Glass Market Global Market ? 37 million tonnes (4.4 billion sq. m) Building Products 33 m tonnes - Automotive 4m tonnes Of which 24 million = high quality float glass 3 million = sheet 2 million = rolled 8 million = lower quality float (mostly China) Global Value At primary manufacture level ? €15 billion At processed level ? €50 billion NSG and Pilkington combined Manufacture of Flat Glass Four main methods Plate Glass (1688) – molten glass poured on to a flat bed, spread, cooled and polished Sheet Glass (1905) – continuous sheet of glass drawn from tank of molten glass Rolled Glass (1920) – molten glass poured onto to two rollers to achieve an even thickness, making polishing easier. Used to make patterned and wired glass. Float Glass (1959) – molten glass poured onto bed of molten tin and drawn off in continuous ribbon. Gives high quality flat glass with even thickness and fire polish finish. ~320 float-glass lines worldwide The Float Glass Process Raw materials Melting Furnace Float Bath Float Glass Plant The Float-Glass Process Raw Materials Raw materials Chemistry of Glass Composition of Glass Structure of Glass Body-tinted Glass CIE L a* b* colour space CIE L a* b* colour space Functions of a Window Light in – homes, offices Light out – shops, museum displays Heat in – heating dominated climates Heat out – cooling dominated climates Can change properties of glass by applying coatings to the surface Making a window functional - coatings A wide variety of coating technologies are utilised by the glass industry Spray Pyrolysis Powder Spray Chemical Vapour Deposition Sputter Coating Thermal Evaporation Coatings Sol Gel Coatings These are applied On Line i.e. as the glass is produced on the float line Off Line i.e. coating no