Uso de óleo residual de fritura como reagente coletor de minerais

Abstract

The main objective of this study was to evaluate the potential of frying residual oil as anionic collector in phosphate minerals flotation. It has been analyzed the acidity index of the oil by titration. Microflotation tests were conducted in Hallimond’s tube with pure apatite, quartz and calcite at high collector concentrations. The pureness of the samples were verified by X-ray diffraction and x-ray fluorescence for microflotation tests. Furthermore, in order to comprehend the mechanisms of the collector adsorption on mineral’s surface, electrophoretic tests with a neutral electrolyte (KCl) and collector solution. It was accomplished a high floatability for calcite (86%) and apatite (71%), at the concentrations of 90mg/l and 100mg/l, respectively. According to the zeta potential, tests the apatite and calcite’s surfaces became more negative in the presence of the collector. In conclusion, it has been notice, by the results analyzes, that is possible to use frying residual oil as collector in phosphate minerals flotation, however it is necessary more specific tests and a deeper study to understand how the variables influences the flotation process.