STUDY OF EMERALD WASTE ADDED TO CERAMIC MASS FOR CERAMIC COATING MANUFACTURING

Reference Presenter Authors
(Institution)
Abstract
09-030 olimpio baldoino da costa vargens neto vargens neto, o.d.(Instituto Federal da Bahia); Barbosa, V.A.(Instituto Federal da Bahia); Leão, M.A.(Instituto Federal da Bahia); SANTOS, O.C.(INSTITUTO FEDERAL DE EDUCAÇÃO CIÊNCIA E TECNOLOGIA DA BAHIA); DA CONCEIÇÃO, A.R.(INSTITUTO FEDERAL DE EDUCAÇÃO CIÊNCIA E TECNOLOGIA DA BAHIA); The use of tailings resulting from the mining industry is one of the great challenges of today, because when these are discarded indiscriminately in nature, they produce a great environmental impact. In addition, the use of the product appears in the market as a viable solution to meet the high demands of the inappropriate disposal by the minimum cost in substitution to other raw materials, but also for contributing to the reduction of environmental damage. According to the National Mining Plan, the mining of emeralds is an important area of ??economic activity in Brazil, the country that ranks second among the exporting nations of this gem. The operation is carried out in an unstructured manner, without adequate technical monitoring. This lack of structure means that there is no full use of the ore, causing an unnecessary amount of waste, which generates an environmental liability. In this context, the present study has as its primary objective the use of the emerald residue as a ceramic mass component. In the formulation of the specimens emerald residues with percentages of 0%, 5%, 10% and 15% by weight were used. The prepared specimens, of dimensions 60x20x5mm, were sintered at temperatures of 850 ° C, 950 ° C and 1050 ° C. After sintering, the following mechanical properties were evaluated: flexural strength, water absorption and linear retraction, as well as the microscopic characteristics of the scanning electron microscopy (SEM) fracture. The results show that the use of the emerald residue in the ceramic mass is within the parameters necessary for its classification as ceramic coating. It is concluded that the use of emerald mining waste is an alternative to the production of coatings, as it generates a material with excellent mechanical properties and commercial potential at low firing temperatures. The use of waste and the low temperatures represent savings in production costs. 
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