Estudo da viabilidade da utilização do by-pass na flotação da Usina do Sossego a partir da avaliação da recuperação por faixa nos estágios Cleaner e Scavenger-cleaner

Abstract

This paper reports a study conducted for the company VALE stage on the feasibility of using the by-pass the flotation circuit of the plant Sossego, from the assessment of the recovery in stages by age cleaner and scavenger-cleaner, varying in size. In order to optimize flexibility and flotation circuit, the by-pass was installed as an alternative for cases of operational maintenance of a vertical mills, where it forwards the material from the circuit rougher and scavenger-cleaner directly to the cleaner circuit thus avoiding the overhead that the mills is in operation and also reducing the feed rate of the plant, which was economically unviable, thus changing the particle size of the alimentation of these circuits. From this fact, the sampling was done in alimentation, concentrate and tailings circuits cleaner and scavenger-cleaner, where the samples were sent to the laboratory where they underwent screening, filtering, drying kilns, homogenization and quartering, and thus prepared for chemical analysis (copper content). After knowing the results of analysis of content was verified the feasibility of using this alternative, since the by-pass has contributed a significant improvement in metallurgical recovery of both copper cleaner circuit as the circuit scavenger-cleaner who got the content copper specified.