Material Transport and Energy Efficiency in Grinding Mills (original) (raw)

2015

Abstract

Comminution is the most energy intensive process in mining industry and it consumes up to 3% of the total electrical energy generated in the world. More than 80% of the plant comminution is spent in the area of milling. There are three fundamental process mechanisms -Particle breakage, charge motion and discharge, that control the energy efficiency of grinding mills. Fundamentally, comminution has been considered as a combination of breakage and classification (or removal of product size particles) processes. Since the work done in comminution is proportional to the energy usage (or power draw), a great emphasis has been laid towards understanding and development of relationships between energy and breakage processes in the last few decades of research. This was followed by the development of discrete element modeling (DEM) in 1980s to understand the charge motion and this technique has been successfully used to optimize the design of shell lifters. Although the quest for efficient ...

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