Valoração de resíduos sólidos através da produção de um compósito de matriz metálica.

Abstract

The inadequate disposition of industrial and consumption waste in the environment is an incorrect practice and very accomplished in the present days. The need to find other purposes for such waste is of extreme importance. The objective of this research was to evaluate the incorporation of an agro industrial residue (rice hull ash) into aluminum waste (beverage cans and metallurgical industry residue) producing a metallic matrix composite. The characterization of these wastes separately was performed by X-ray diffraction analysis, X-ray fluorescence and optical spectrometry. Rice husk ash is a product with high purity silica, with about 90%. The aluminum recycling process is extremely important because it reduces the volume of bauxite that would need to be extracted to produce the same amount of raw material and also produce a material with 95% of purity. By means of the stirring melting technique, the rice husk ash was incorporated into the aluminum matrix. Optical and scanning electron microscope analyzes were carried out confirming the introduction of reinforcement in the matrix. To investigate the properties of this composite, tests of hardness, impact strength and density were performed, attesting the improvement of some properties of this material.