Secondary & Tertiary Crushing Circuits
project viability is generally more pronounced when treating hard ores than average to soft . historically relied on the use of bond crushing and rod mill work indices . General Manager Technical Solutions, Ausenco Limited, 8/2404. Logan Road .. competence, ie the lower values of A × b indicate harder rock. In contrast to.A crusher is a machine designed to reduce large rocks into smaller rocks, gravel, or rock dust.. Crushers may be used to reduce the size, or change the form, of waste materials so they can be more easily disposed of or recycled, or to reduce the size of a solid mix of raw materials (as in rock .