Viabilização técnica e econômica da lavra contínua de minério de ferro com o uso de sistema de britagem móvel in pit auto propelido

AUTOR(ES)
DATA DE PUBLICAÇÃO

2010

RESUMO

The conventional mining methods employed in most iron ore mines around the world are based in truck haulage. Starting in 1977, Samarco S/A has successfully introduced an innovative mining method in its iron ore mine located in Mariana, MG, Brazil. Samarcos mining method, known as belt conveyor-based mining, has replaced haul trucks for belt conveyors on the benches, with the front-end loaders feeding the ore directly into the conveyor system through a ore-transfer silo. This method has been used successfully ever since, delivering operational costs significantly lower than those of conventional mining methods. The present research describes a technological innovation effort focused on the challenge of further reducing the mining costs of the belt-conveyor-based mining method. The main objective is to validate the feasibility of the in-pit self- propelled crusher method against the conventional mining method using haul trucks, and against the current belt conveyor-based mining. The approach is based on the comparison of the operational and economic indicators achieved after the implementation of the in-pit crusher method against the forecasts on the original feasibility study. The results have shown that the in- pit crusher method is highly competitive in comparison to the other methods analyzed. The cost savings estimated in the original feasibility study have been validated and were considered appropriate in relation to the international case- studies evaluated as part of the research.

ASSUNTO(S)

lavra lavra de minas britagem (beneficiamento de minério)

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