Caracterização e processamento de resíduos vítreos visando a reciclagem no município de Campina Grande-PB.

Abstract

Glassy residues are 100% recyclable. Its reuse reduces environmental impact, contributes to the diversification of manufactured products and fall production’s costs. This study aimed the recycling, on craft scale, of waste glass from vitreous residues from the urban disposal of Campina Grande/PB city, targeting the sustainability of a collectors group. Flat and hollow glasses were characterized by chemical analysis, TG and DTA, and subjected to different temperature profiles in order to obtain new products. The chemical composition of glasses employed showed that they are sodium-calcium-silicates. The DTA curve showed two small endothermic bands in the 700 - 750ºC range and between 800 and 1000°C which is characteristic of glass fusion. A negligible loss of weight (<1%) was observed on TG which confirms the high thermal stability of flat glass. Tests indicate that the ideal temperature for fusion was 800ºC. From the studies, it was possible to transfer the acquired knowledge to the residue collectors team of the Unidade de Beneficiamento de Materiais Vítreos through workshops in drawing, painting, molds preparation, beneficiation, pigmentation and burning of the working material.