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Published on January 9, 2008

Author: Dolorada

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Slide1:  TITLE: DEVELOPMENT OF STRATEGIES FOR THE REUSE OF CATHODE RAY TUBES PROGRAM: INTERREG III C SUR DEVELOPMENT OF STRATEGIES FOR THE REUSE OF CRTs :  DEVELOPMENT OF STRATEGIES FOR THE REUSE OF CRTs INDEX 1- ECO-TV PROJECT , BACKGROUND 2- ENVIRONMENTAL PROBLEMS RELATED TO CRTs. 3- GENERAL DATES 4- STRATEGIES FRONT NEW TECHNOLOGIES 5- DETERMINING FACTORS RELATED TO DUMPING AND RECICLING CRTs. 6- OPEN- LOOP APPLICATIONS FOR END OF LIFE OF CATHODE-RAY TUBES GLASS IN CONSTRUCTION MATERIALS. 2- ENVIRONMENTAL PROBLEMS RELATED TO CRTs. :  2- ENVIRONMENTAL PROBLEMS RELATED TO CRTs. (CRT) Cathode ray tube Glass Contains: lead, barium and strontium. Environmental conclusions Actually glass is not recovered from this materials. That devices have to be disposed in landfill soils. Raw materials lose. Conventional television High toxic materials 1- ECO-TV PROJECT BACKGROUND:  The rapid adoption of new technologies, CRTs growing popularity of LCD & Plasma-TVs. Drop in market of this devices and the features that the new technologies offers 1- ECO-TV PROJECT BACKGROUND Due to the rate of discarded computer monitors and TV screens based in CRT’s technologies have to be disposed in landfill soils. Causes The increasing rate of PC screens and TVs out of work to be management as a waste material and the lack of management systems. Environmental legislation: for waste electrical and electronic equipment devices. REAL DECRETO 208/2005. ECO-TV PROJECT It must be complied the selective collection of CRTs. The main priority for its treatment is its reutilization. In Consequence 3- PROJECT DATA:  3- PROJECT DATA Key data. Objective: DEVELOPMENT OF STRATEGIES FOR THE REUSE OF CATHODE RAY TUBES Total budget: 51.967 Euros Community contribution Perspective program : 78% Duration: 13 Months. European Project ( Spain, Hungary) Project leader: VALENCIA PROVINCIAL COUNCIL. Technological partner: AIDICO Instituto Tecnológico de la Construcción. European partner: E-misszió ( Asociación sin animo de lucro instalada en Hungría destinada a la promoción de iniciativas ambientales). Environmental benefits Reduce on contaminant dumping Reduce on the consumption of raw materials (silica sand…) Valuable market for stock in landfill sites Waste product into resource. Added Value Partners 4. STRATEGIES FRONT NEW TECHNOLOGIES :  4. STRATEGIES FRONT NEW TECHNOLOGIES PC Monitor Analogical TV New Market For Raw materials * *Electronics Recycling Demonstration Project, Minnesota 2000. Tony Hainault et al. Slide7:  Figure 2. Anatomy of CRTs* THE CRTS OR CATHODE RAY TUBES DEVICES WERE DEVELOPED IN THE 40S, THEY ARE THE MAIN COMPONENT IN MONITOR AND TVS SETS AND ALLOW TO SEE THE IIMAGE. Glass Screen. CRTs front part. The CRTs last models had changed lead for SrO y BaO Glass Funnel. The Backside of CRTs, it has the bigger lead content Neck Glass (contains lead). Table 1. Glass Composition in weight (%) *Characterization of Lead Leachability from Cathode Ray Tubes Using the Toxicity Characteristic Leaching Procedure. Timothy G. Townsend. University of Florida, 1999. Slide8:  OPEN-LOOP APPLICATIONS FOR CRTs IN CONSTRUCTION MATERIALS Ceramic based Materials Insulation materials Polymer based Materials Cement based Materials Geopolymeric source Slide9:  Silica based ceramics silica glass also can introduce a radical change in the ceramic technology and in the development of low temperature ceramic products Ceramic paste Clay. Degreaser agents Flux agents Talc… *Adapted from CERAM, del Project: Materials Recovery From waste Cathode Ray tubes (CRTs) 2002-2004. The Waste & Resources Action Programme. ISBN: 1-84405-077-7. Link: www.wrap.org.uk *Figure 4. Optimum firing temperatures to attain the desired properties *Figure 3. Colour comparison between three sets of briquettes (0, 5% 10% CRT glass fired to 1080ºC *Table 2 . Physical properties for the briquettes developed Slide10:  *Products glazed with coloured versions of this base glaze with 95% of EOL CRT colour panel glass . PC+ 5% pigment TV + 5% pigment MIX+ 5% pigment CRT glass in glazes. CRT panel glass cullet contains barium, strontium and zirconium oxides, components that are often added to glazes bacuse of their positive effect on glaze quality. *Adapted from L A R. Siikamäki. Glaze For low-Fired Ceramics From End-Of-Life Cathode-Ray Tube Glass. Glass Waste, ed. Mukesh C. Limbachiya, John J. Roberts. Thomas Telford Publishing, Kingston 2004. pp.281-289. *Table 3. Glaze properties *Table 4. Leaching of heavy metals, ISO 7086 test (glazes containing 14.5% CRT (in weight)). Slide11:  CRT GLASS PbO Foaming agents TiN o SiC 750-900ºC N2, CO2 , O2 SiO2 Pb FOAM-GLASS SYNTESIS Gas bubbles, due to oxidation reaction FOAM-GLASS related Bibliography:  FOAM-GLASS related Bibliography François Méar, P Yot et al. “Characterisation of porous glasses prepared from Cathode Ray Tube (CRT)”. Powder technology Vol 162, pp 59-63. (2006). François Méar, P Yot et al. “ Effects of temperature, reaction tiem and reducing agent content on the synthesis of macroporous foam glasses”. Materials letters Vol.60, pp. 929-934. (2006). François Méar, P Yot et al. “Mechanical behaviour and thermal and electriacla properties of foam glass”. Ceramics international Vol.33, pp 543-550. (2007). F. Méar, P.Yot et al. “The changes in lead silicate glasses induced by addition of a reducing agent (TiN or SiC). Journal of Non-Cristalline Solids. Vol. 351, pp 3314-3319. (2005). G. Bruasatin, E. Bernardo, G. Scarinci. “Production of Foam Glass From Glass Waste”. Glass Waste, ed. Mukesh C. Limbachiya, John J. Roberts. Thomas Telford Publishing, Kingston 2004. Pp68-81. EUROPEAN PRODUCERS of Foam Glass, related* Furnace at Hasopor, Norway. Millcell, Switzerland *Adapted from CERAM, del Project: Materials Recovery From waste Cathode Ray tubes (CRTs) 2002-2004. The Waste & Resources Action Programme. ISBN: 1-84405-077-7. Link: www.wrap.org.uk Slide13:  Polymer based materials. Polyester resin CRT GLASS COMPOSITES Activator Catalyser POLYMER COAT *Girbés I. Adapted de PETRART, Proyecto: Desarrollo de nuevos acabados en productos de piedra artificial para la obtención de revestimientos de uso exterior e interior. EXP; IMIDTA/2004/187. AIDICO **Rodríguez MJ. & Girbés I. Adapted de REVIHOR, Proyecto: Reutilización de residuos de vidrio como puzolana en prefabricados de hormigón . OCYT 2003. AIDICO *Figure 5. Artificial stone picture. PETRART **Table 5. Some Properties of covers developed in REVIHOR Slide14:  *Girbés I. Adapted de REVIHOR, Proyecto: Reutilización de residuos de vidrio como puzolana en prefabricados de hormigón . OCYT 2003. AIDICO. ** Adapted de Morrison C. “Reuse of CRT Glass as Aggregate in Concrete”. Glass Waste, ed. Mukesh C. Limbachiya, Jhon J. Roberts. Thomas Telford Publishing, Kingston 2004. pp. 91-98. Filler or Lightweight Aggregate for Concrete, open a reliable and economically viable alternative for high-tech applications in structural concretes Slide15:  SOURCE OF GEOPOLYMERS *Beleña I. & Girbés I. Adaptado de REVIHOR, Project: Reutilización de residuos de vidrio como puzolana en prefabricados de hormigón . OCYT 2003. AIDICO Fig 8. Glass activation after initial treatment with alkaline solution NaOH 6.4M. This objective requires deep research in the alkali activation processes of silica based pozzolans yielding special high durable and compact concrete. Low energy consumption Low environmental impact . . Slide16:  Contacts; Isabel Girbés Clari, Ph.D. Hydraulic Binders area e-mail: isabel.girbes@aidico.es Javier Ferrer Roig. Valencia Provincial Council. e-mail: javier.ferrer@dva.gva.es Zoltán Kurtán E-misszió Environmental Association E-mail: zoltan.kurtan@dbh-group.com

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