masterThesis
Uso de geotêxteis não tecidos para o dessecamento de resíduos da operação de corte de rochas ornamentais
Fecha
2019-07-30Registro en:
VASCONCELOS, Italo Andrade. Uso de geotêxteis não tecidos para o dessecamento de resíduos da operação de corte de rochas ornamentais. 2019. 71f. Dissertação (Mestrado em Engenharia Civil) - Centro de Tecnologia, Universidade Federal do Rio Grande do Norte, Natal, 2019.
Autor
Vasconcelos, Italo Andrade
Resumen
In the past years the production of ornamental rocks have been intensified at Brazil, with the
demand increase on the confection of ornamental pieces there were concerns about the amount
of waste produced and its correct conduction, considering that during the process of cutting and
polishing of rock, the water is used for the refrigerated the diamond disc. With that, the water
used to carry the solids particles of the rock, resulting in an abrasive sludge that are generally
conducted, in Brazil, to septic tank and sewage systems causing silting of the water courses due
to the deposition of the solids or the sludge were deposit for decantation processes with the
reuse of water. But this procedure has little effectiveness and it takes a long time to complete
the desiccation because of the thinness of the solid material contained in the slurry. Due to this
fact, has been known of the efficiency to use geotextiles in the desiccation of materials with
small particle sizes. The present study sought to evaluate the dewatering of the sludge produced
in the marble industry using three different types of geotextiles. At the beginning it was
developed a prototype with small dimensions in which the geotextile was inserted in its interior.
Therefore, procedure successive fillings that symbolized the fillings performed between the
cutting stages at the marble industry. Observing the flow rate behavior and the reduction of the
total solids content through the prototype developed, in each filler and for each geotextile under
study. It observed that the geotextiles had a typical behavior in the flow outflow over time,
independent of the geotextile used, besides a significant reduction in the solids content of the
prototype showing the efficiency of the use of the geotextile for the drying of this type of
abrasive sludge. Finally, it was concluded that the GTX300 obtained the best response in the
reduction of solids content and a better distribution of the flow over time.