CRT cullet recycling CRT cullet recycling LG Philips

CRT cullet recycling

CRT cullet recycling LG. Philips Displays - Joint Venture between LGE and Philips (2001) - World’s Leading CRT producer - Number one CPT (TV CRTs) company - Revenue 2004 at 4 bln USD (67 M CRTs) - LPD serves ~ 30% of the CRT TV market - First company to introduce Super. Slim (2004)

CRT cullet recycling LG. Philips Displays glass operation Glass Development Eindhoven Glass Factory Aachen Glass Factory Zhengzhou Glass Factory Capuava Glass Factory Suzano

CRT cullet recycling LG. Philips Displays Superslim CRT

CRT cullet recycling CRT glass products

CRT cullet recycling Glass cone Gun Electron beams Deflection yoke Screen Picture : Scheme of an operating CRT

CRT cullet recycling Why recycling of CRT glass? • Mature market: heavy price erosion • Raw materials prices increase (energy price, transport, shortages) • WEEE legislation, recycling is strongly supported by governments • Energy savings • CO 2 emission (future issue)

CRT cullet recycling What is CRT cullet ? • Cullet are pieces of broken CRT glass • In general, the CRT glass factories can use cullet of similar compositions • funnel glass is used for funnel glass production • panel glass is used for panel glass production • mixed glass (panel + funnel) is used for funnel glass production

CRT cullet recycling Function of cullet • Primary functions • Essential part of the glass recipe to produce new CRT glass • Cullet is raw material and is used in the mix with other raw materials to produce the final glass composition Without cullet glass melting operation is economically and technically not feasible Secondary functions • Mixing tower • Helps to mix the raw materials, helps the flowability in the silo, cleans the chargers • Melting process • Accelerates melting process by lowering the melting temperature, increases the furnace lifetime, saves energy, reduces emission of dust

CRT cullet recycling Origin of the cullet • Reject from own production process (Glass factories) • Reject from the tube production process (tube factories, set makers) • Cullet recycled from the old TV sets and monitors so called EOL (End Of Life) cullet

CRT cullet recycling What are the benefits of CRT cullet recycling? • Melting on lower energy, less fuel (oil, natural gas, electricity) needed • Example: Yearly saving of 1 Mio m 3 gas at production and 1, 4 Mio m 3 gas at the suppliers • Less CO 2 emissions since the carbonates are already transformed to oxides • Example: Net output glass 45000 t/y, 30 % cullet means about 4000 tons less CO 2 emission • Less particles emissions since cullet does not produce dust • The cullet is not disposed to the landfill but brought back into closed loop “glass to glass recycling” • Less mining of raw materials required if recycling cullet is used

CRT cullet recycling LG. Philips CRT cullet recycling program • Recycling program started in the early 1990’s • The scope of this program was to develop a solution for the increasing problem of land filling of the CRT glass • Other solutions than “glass to glass recycling” are environmentally not accepted • A research was made focusing on upgrading the CRT glass to be able to use it in the CRT glass melting process • A new raw material was developed: ECORAM • This material was successfully introduced at LGPhilips glass factories worldwide • Panel glass in panel glass and dedicated cone glass recycling is also standard practice

CRT cullet recycling Issues for CRT glass recycling • Separation of panel and funnel (different glass types) • Cleaning • Metal separation • Separation of organic materials • Separating ceramic materials • Dealing with variations in glass composition and glass properties • Selecting the right grainsize • All on a level of less than 10 glassfaults/ton, with long required furnace lifetime and a sensitive mass production process • See “Recycling of TV glass, Profit or doom? ” (American Ceramic Society Bulletin vol. 80, no 3 p. 51 -56)

CRT cullet recycling CRT recycling cullet quality • Because CRT cullet is raw material there are very high quality demands • critical impurities to product reject Ceramics stones Organic material bubbles Cullet homogeneity cords • Critical impurities to furnace damage Organic material lead reduction Alumina coatings lead reduction Metal contamination Metal (lead) reduction

CRT cullet recycling Special issues for crystal glass Similarities: • Glass types ( lead crystal and barium crystal glass) • High quality demands • Heavy pressure on costprice Differences • Volume issue: smaller volume means less economy of scale • Recycling firms are not yet ready to meet demands • Extremely strict demands on transmission • Lead oxide will be phased out (Ro. HS)

CRT cullet recycling Conclusion ØCRT cullet is essential part of the glass recipe and without cullet CRT glass making is economically and technically not feasible ØThe CRT recycling glass is used as raw material instead of the raw materials produced by mining and chemicals ØIf recycling cullet is used less raw materials are mined or chemically produced which reduces the environmental impact and CO 2 emission Ø By using CRT recycling glass the CO 2 emission into atmosphere is being reduced by about 14 %. So for each ton of CRT recycling glass used about 140 kg CO 2 is saved ØThe only practical solution to avoid land filling is to support the “glass to glass recycling’. ØCrystal glass can profit a lot from experience of CRT and container glass recycling, but specific issues need to be addressed