Comminution

Mechanical high-velocity comminution by VeRo Liberator® technique for efficient particle liberation and size reduction

Summary: The efficiency improvement in the comminution of ores has been on the international agenda of the mining industry for some time but substantial advances are still relatively scarce. It is generally agreed upon that major goals include a substantially reduced energy consumption, systems that operate dry, markedly enhanced particle size reduction, and improved particle liberation. The VeRo Liberator® was invented some five years ago and applies a completely new, mechanical comminution principle, which applies highvelocity, high-frequency impact comminution.

1 Introduction

The industrial scale 100 t/h VeRo Liberator® prototype features a vertical four-fold axle-in-axle system, equipped with a large number of hammer tools, which rotate on three levels clockwise and anticlockwise against each other. The resulting high-frequency, high-velocity impacts cause a highly turbulent particle flow and trigger fracture nucleation and fracture propagation preferentially at and along mineral boundaries. Breakage occurs from the high-velocity stimulation of particles, where the elasticity and compressibility modules control differential particle behaviour. This...

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