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Universidade Federal De Santa Catarina Centro Tecnológico Programa De Pós-graduação Em Engenharia Química
| Content Provider | Semantic Scholar |
|---|---|
| Author | Jorge, Geraldo Martins, Mayer |
| Copyright Year | 2014 |
| Abstract | Current and future markets points to a growing need to reuse the existing inputs, as well as transform the rejects from a process as a raw material to another process. This productive route in addition to minimize or eliminate environmental liabilities enables a greater profit, because it eliminates cost the of transportation, disposal and neutralization of waste, minimizing the environmental and social impact and leading raw materials costs to more competitive levels. In this context, the heavy ash of coal that is a byproduct originated of coal combustion in thermo-electric plants presents itself as a raw material for the glass industry. This happens because of their physical, chemical and mineralogical characteristics that are compatible with various raw materials used in the glass industry, indicating a possibility of full or partial replacement of these inputs to the production of vitreous materials and glass-ceramic. This study has its focus centered on the development of formulation to the production of glass-ceramic materials based on heavy ash of coal generated in Thermo-electric Plants as raw material of low cost and high added value. To merge the vitreous masses, was performed a complementary study using the Vogel-FucherTammam equation, relating the components of each formulation with the objective of obtaining an algorithm that relates the composition of the sample to the temperature prediction of thermo-physics phenomena, crystallization, formation of a half ball, softening and melting. For this study, it was used an experimental planning {3.3}, resulting in ten formulations of the three components, heavy ash and two fluxes (Na2O and LiO2), in a delineation of mixtures that allowed the generation and analysis of response surfaces diagrams related to thermal phenomena linked to the formation of glass and glass-ceramic obtained in this study. It was also created a mathematical model from a logistic curve with the goal of predicting the melting temperature of the material without the need for thermal analyses. The glass-ceramic generated was also evaluated through quantification of crystalline phases by x-ray diffraction that pointed to the emergence of eucriptita and nepheline as majority phases. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://repositorio.ufsc.br/xmlui/bitstream/handle/123456789/129201/331438.pdf;jsessionid=82CB9D745E443463AF6641859D2FFE1F?sequence=1 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
