Comminution

Abstract

Size reduction is an integral part of mineral processing which has the largest contribution to the energy consumption of mineral processing plants. This chapter provides an overview of size reduction theories and describes different mechanisms of breakage which are relevant in the mineral processing context, along with ore characterisation tests which measure the response of ore to different mechanisms of breakage. The most common comminution machines found in mineral processing are briefly described with explanations of how such equipment are typically laid out in comminution circuits. Concepts of novel approaches to designing flexible circuits are presented followed by process operation control strategies. Fine grinding, becoming an integral part of many mineral processing circuits, is also covered in this chapter along with appropriate placements for applications of fine grinding machines and important operating parameters. This chapter covers aspects of comminution which are relevant to mineral processing only and does not extends to other areas such as food, chemical, pharmaceutical, etc.