Desenvolvimento de artefatos vítreos obtidos pela reciclagem de lixo eletrônico - caracterização e processamento.

Abstract

The vigorous industrialization of modern world, high consumption, accelerated rhythm of the innovation and programmed obsolescence do with that electronic equipments become electronic waste in short time. Thousands of computer monitors that are erroneously discarded in the environment are part of that waste, because these contain great amount of vitreous residues that can be reused and/or recycled. Recycling of that type of residues occurs without volume or properties loss. This work has as objective collects, to characterize and to recycle vitreous residues originating from of Cathode Rays Tubes, identified for CRT (Cathode Ray Tubes), which integrate monitors of computers. Those materials were characterized through X-Ray Fluorescence, X-Ray Diffraction, Scanning Electron Microscopy, Thermogravimetry, Differential Thermal Analysis and Fourier Transform Infrared Spectroscopy techniques. Vitreous residues were submitted to two recycling technical processes: Slumping and Casting to handcrafts production. For so much, plaster, quartz and feldspar (GQF) and plaster molds were made. After the characterizations it was observed that screen and funnel glasses, that constitute the monitor, presented different chemical compositions, being silicium oxide (SiO2) the component in larger percentile in these glasses, with 59.89% and 48.63% grades for screen and funnel, respectively. X-ray diffractograms of funnel and screen vitreous residues samples are to each other similar, presenting an amorphous band that indicates absence of crystalline phases. In vitreous residue micrographs, considerable irregularity was observed in the particles size, while thermogravimetry showed glass thermal stability. Analyses were accomplished to several temperatures to identify the appropriate temperature to Slumping and Casting techniques, being determined 760 and 800 °C, respectively. For recycling techniques used can be concluded that computer monitors CRT has potential to be recycled in decoration artifacts production, contributing with environment preservation in agreement with sustainability principles.