Comparação entre dois cenários de produção para uma mina de ouro, com a aplicação de conceitos de teor de corte e custos fixos

Abstract

This work brings a comparison of two production mining models, aiming to optimize the destination of each material to seek the best economic result, starting from a defined final pit limit and using concepts of Cut of Grade. The two scenarios were designed using the Deswik.blend software. The first scenario (Cenário_01) was designed respecting the constraint existing in the current process (Rota_01) and the second (Cenario_02) seeking an alternative process route (Rota_02) to increase production using the low-grade ore material. The main restriction in the currently existing process (Rota_01) is the transport of material since there is overcapacity in the equipment responsible for the other stages of the process. The current process route (Rota_01) has a maximum capacity of 6.24 million tons per year, restricted by transport capacity. The idea of the alternative route (Route_02) is to take crushed material by truck to the leaching pads, thus achieving an estimated extra production capacity of 1.113 million tons per year. The results showed an increase of 7,7% in operating profit (EBITDA) and around 9% in the project's NPV.