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 high-
velocity, 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...

Related articles:

Issue 04/2018

Innovation

Dear readers, The mining industry faces important challenge, as outlined in the report on “Global mining trends 2018". Although commodity prices are on the rise again, most markets are still facing...

more
Issue 01-02/2017

Challenges in the ore processing

Advanced technologies for pre-concentration and comminution of low grade ores in the FAME project

Many of these elements are regarded as “Critical Raw Materials” (CRM) by the EU as they are - limited in securing their supply - used extensively by European Industry and currently their supply is...

more
Issue 05/2016

Trends in the Crushing of Mineral Ores

Mining Industry

1?Introduction Crushing is an important step in the complex process of mineral processing (Fig. 1). In open pit mines, rock chunks with edge lengths of 2 m have to be processed. In underground...

more
Issue 11/2016

Equipment concept

Optimizing the production of crushed sand for dry-mix mortar industry

1 Introduction “Mortar” is a building material that can be described as a mix consisting of a binder (e.g. cement, lime), mineral aggregate with a maximum particle size d = 4.0 mm, and any...

more
Issue 12/2014 ESCC 2015

Call for abstracts is now open

It is with great pleasure that Chalmers University of Technology invites all interested to the European Symposium on Comminution and Classification on the 7-10 September 2015 in Gothenburg/Sweden....

more