• Gregor Borg
  • Martin-Luther-Universit├Ąt Halle-Wittenberg
  • Germany
Abstract

Mining and mineral processing industry are under pressure from political and social stakeholders to deliver products more sustainably with a much smaller environmental impact. Technical innovations to achieve these goals include reduction in energy consumption, waterless mineral processing, improved particle liberation, and safe dry stacking of tailings. Traditional abrasional comminution in robust ball and SAG mills is known for its inefficiency with respect to breakage and energy consumption. Earlier theoretical predictions and numerical modelling postulated that more efficient impact breakage should occur at higher impact energies from higher operational velocities. The VeRo Liberator impact crusher operates in such a mechanical high-velocity regime and achieves very high particle size reduction ratios and degrees of particle liberation at very low energy consumption and without using process water. These step-changing comminution results are achieved from high frequency, high-velocity impacts with an efficient momentum transfer that leads to the effective disintegration of the feed material. The VeRo Liberator technology has currently achieved TRL 7 and several units operate currently at mining operations and test facilities in South Africa

About the speaker

Gregor Borg is a German geologist and holds a double affiliation as Professor of Economic Geology and Petrology at Halle University in Germany and Honorary Professor at the Camborne School of Mines in Cornwall. Gregor has published widely on a wide range of topics such as ore deposits, crustal evolution and geoarchaeology. He works also as consultant to the international mineral exploration and mineral processing industry. As one of his assignments he is the Chief Consultant for PMS GmbH, who have invented, produced, and marketed the highly innovative VeRo Liberator ore comminution technology