Análise de viabilidade financeira e operacional sobre a nova planta para de reprocessamento de rejeitos da mina Lago Azul do estado de Rondônia

Abstract

Over the years, large mining projects have been depositing tons of tailings in contagion dams. Any type of mineral exploration generates waste, ore and ore tailings. These dams represent a constant risk to the environment and to the population that lives in the surroundings, so they need constant monitoring. In addition to the large enterprises, the médium and small ones also produce tailings. In the last tow decades, several educational institutions in many countries bagan to study ways to reuse mining tailings, using the added value to the ore as na incentive for companies to turn their resources to this type of study. In Brazil, such studies are very focused on iron ore tailings. This study, however, focuses on the reuse of cassiterite tailings in the Lagoa Azul mine, in the state of Rondônia. The data is real and was collected in the field and the calculations were made based on curret quotes. Considering the high contente os cassiterite and niobium in the tailings, we will discuss the methods that will be used to separate thisand Other minerals of interest that are presente in tailings from mining in the state. The economic feasibility study was based on a new processing plant that was acquired for the reprocessing of tailings from the Lagoa Azul mining in Itapuã d’Oeste – RO. Using the payback method for financial analysis, which broadly is the study of cash flow resulting from the algebraic sum of three estimates: revenue, cost and taxes.This study found that the acquisition of the new plant is economically and operationally viable, considering that after the start of its operation, it will reach a payback within 15 months, taking into account a minimum attractiveness rate (TMA) of 20%, providing an increase in weekly cash flow of 110%