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Major Trends in the Mineral Processing Industry

Aktuelle Trends in der mineralverarbeitenden Industrie

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Abstract

The paper starts by considering the broad framework of the industry, and in particular whether the current boom in production and the threatened shortages of certain strategic minerals are likely to lead to scarcities. The paper suggests that shortages are unlikely and that minerals will become even more widely available and at lower cost. That said, energy and maintaining the license to operate will drive the introduction of new technologies.

Using copper as an example, we point out the inevitable lower grades that will be processed and for ever lower selling prices in real terms, as has happened for centuries. Technological innovation is the driver of these trends, and the paper highlights several areas where significant changes are poised to occur: in pre-conditioning and in minimizing grinding by removing gangue at coarser sizes earlier in the flowsheet; in recognition that the excessive energy used in comminution may be largely caused by the formation of force chains that bear the load and resist breakage events; and finally, two developments by Jameson (Can Metallurgical Quart 49(4), 324–330, 2010) for more energy efficient fine particle flotation and a significantly new concept for coarse particle flotation to 1400 micron.

Zusammenfassung

Zunächst werden allgemeine Aspekte der mineralverarbeitenden Industrie betrachtet; insbesondere die Frage, ob der derzeitige „Boom“ bei der Produktion und die drohende Knappheit bestimmter strategischer Mineralien eventuell zu Engpässen führen könnten. In der vorliegenden Arbeit wird die These aufgestellt, dass Engpässe unwahrscheinlich sind und dass mineralische Rohstoffe zunehmend zu niedrigeren Kosten verfügbar sein werden. Außerdem werden Energiefragen und die Erhaltung von Betriebsbewilligungen die Einführung neuer Technologien vorantreiben.

Am Beispiel von Kupfer wird auf die unvermeidliche Verarbeitung armer Erze und auf die stetig sinkenden realen Verkaufserlöse verwiesen, was bereits seit Jahrhunderten zu beobachten ist. Technische Innovationen treiben diese Entwicklungen voran. Einige Gebiete, in denen wesentliche Veränderungen zu erwarten sind, werden in der Arbeit vorgestellt:

  • Reduktion des Zerkleinerungsaufwands durch frühere Abtrennung von grober Gangart,

  • Bedeutung des Kraftflusses über Materialbrücken für die Zerkleinerungsenergie,

  • Aktuelle Entwicklungen von Jameson bezüglich der Flotation im Fein- und Grobkornbereich (bis zu 1400 μm).

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Correspondence to Robin J. Batterham.

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Batterham, R. Major Trends in the Mineral Processing Industry. Berg Huettenmaenn Monatsh 158, 42–46 (2013). https://doi.org/10.1007/s00501-013-0109-0

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