Estudo e caracterização de um resíduo gerado no processamento de granito

Abstract

Brazil is among one of the largest producers and exporters of ornamental and cladding stones. However, the production chain of these materials is one of the biggest generators of waste in the mining industry. Residues from ornamental rocks have characteristics and properties similar to the source material. However, the irregular disposition of these materials can generate several damages to the environment. Currently, with practices aimed at preserving the environment, waste can be used in applications in other industrial sectors. In this sense, it is necessary to know their characteristics and properties for possible applications or to be disposed of in licensed landfills. Thus, the main objective of this work is to characterize a fine residue generated in the granite processing of a company located in the state of Ceará. For this purpose, tests were carried out by scanning electron microscopy, macroscopic analysis of the rock, specific mass, moisture, granulometric analysis and thermogravimetric analysis. The rock of origin of the residue is a monzogranite, being observed in the residue the presence of minerals such as zircon and albite. The specific mass of the residue sample was 2.52 g/cm3 and is close to that of rock composition minerals. The granulometry rocha ornamental; Ceará; aproveitamento.of the sample is constituted of a fine material, with 90% of the material smaller than 90µm, with low humidity and with stable thermal behavior. It is possible to infer the use of fine granite residue for the production of materials such as red ceramics, concrete blocks, cladding ceramics and in agriculture. However, these materials would need to be subjected to specific technological studies to prove the feasibility of using these products.