Utilização de resíduos de catalisador (ECAT) e cinzas da casca de arroz (CCA) na elaboração de vidros silicatos soda-cal destinados ao setor de embalagem

Abstract

Study on the use of rice husk ash (RHA) and waste catalyst (ECAT), two industrial solid waste generated in large quantities in Brazil, getting soda-lime glass for the production of packaging. Both the waste may be classified as class II waste according to NBR 10,004. Samples were produced adding Na2CO3 and CaO to obtain a composition within the range of commercial soda-lime glasses. The results showed that both can be used as received (without any previous treatment) replacing important raw materials, source of Al2O3 and SiO2, necessary for glass formation. The produced samples were amber due to the presence of nickel (Ni2+ ions) from the ECAT and optical transmittance of 18%. These also showed good homogeneity, i.e., absence of bubbles and striae and dissolution rate higher than a commercial soda-lime glass. In general, the samples are presented suitable for applications that require low transmittance such as colored glass containers, which does not require perfect visibility and transparency. Finally, the waste level of incorporation was approximately 78 mass%.