Cathode ray tube glass recycling: an example of clean technology

Abstract

In this study the use of ‘cleaned’ end of life (EOL) cathode ray tube (CRT) glass as a raw material in ceramic glazes is described. At present, the recycling and industrial utilization of CRT, a glass material from TV and computer sets, is a subject of intense research with particular regard to the so-called open-loop recycling, namely cycles different from that of the origin. However, the use of CRT glass as a secondary raw material is strictly related to the demand of high-quality raw material. The good preliminary results reached by introducing clean TV and PC monitor panel and cone glass into ceramic glaze formulations pushed research toward the setting-up of a base glaze that is exploitable for the production of pigmented, silk-screened and flame-hardened glazes (products used industrially for coating floor tiles). The aesthetic and chemical characterization of the tiles glazed by this product showed an extremely similar behaviour to originals that did not contain CRT glass. The good technical results achieved have been supported by the life cycle assessment analysis, which has demonstrated a reduction of the environmental impact of the CRT glass-containing ceramic glaze with respect to the standard one.

Keywords

Cathode ray tube glass waste of electrical and electronic equipment ceramic glaze life cycle assessment wmr 793-3

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References

Andreola, F. , Barbieri, L. , Corradi, A. , Lancellotti, I. , Falcone, R. & Hreglich, S. (2003) Possibilità di riciclo di vetro da cinescopi dismessi per l’ottenimento di vetro-ceramici . Rivista della Stazione Sperimentale del Vetro (Possibility of end of life cathode ray tubes glass recycling for the obtainment of glass-ceramic materials). 33, 25-29 .

Andreola, F. , Barbieri, L. , Corradi, A. , Garzoni, M. , Guidetti, E. , Lancellotti, I. , Medici, A. , Rabitti, D. & Sansone, A. (2004) Smalti per piastrelle dal vetro di TV e monitor. (Glazes for ceramic tiles starting from TV and PC monitors glasses) . Recycling, 8, 85-89 .

Ecohitech a cura di Consorzio Tecnoimpresa Editore. (2004) Milano, pp. 29-41.

Eppler, R.A. (1983) Glazes and Enamels in Glass Science & Technology, vol. 1. Academic Press, New York .

FISE ASSOAMBIENTE. (2003) L’Italia del recupero, Rapporto FISE ASSOAMBIENTE sul riciclo dei rifiuti, (Italy of recovery, Report FISE ASSOAMBIENTE on waste recycling) 123-137,

Fleming, J.W. (1993) Optical Properties and Characterization in Experimental Techniques of Glass Science, Simmons C.J. , El-Bayoumi, O.H , (eds). The American Ceramic Society, Westerville, OH, USA .

Guy-Schmid, C. & Thamin, E. (1998) Recytube: integrated recycling of end-of-life Cathode Ray Tube glass . Proceedings of the TRAWMAR Workshop, Rhodes.

Lewis, P.A. (1988) Pigments Handbook, Vol. 1. John Wiley & Sons, New York .

Navarro, J.M.F. (1991) El Vidrio, CSIC, Madrid, Spain .