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From Blasting to Grinding: The Different Stages of Ore Breakage in Comminution

Beschreibung

Comminution is an essential part of mineral processing which involves the breakage of ore to achieve size reduction. Its aim is to increase the likelihood of separation and liberation of valuable minerals from gangue in subsequent processing stages (Napier-Munn et al., 1996; Fuerstenau, 2003; Wills and Napier-Munn, 2015). Ore breakage in comminution occurs in three forms, namely; blasting, crushing and grinding (Kapur et al., 1997; Le Pham, 2011; Yahyaei et al., 2016). During blasting, ore breakage occurs by means of explosive devices. In crushing, it occurs via mechanical compression of ore against hard surfaces (Unland and Szczelina, 2004). In the case of grinding, ore breakage takes places through a combination of two or more of: impact (ores drop against a rigid body or media drop against ores), abrasion (ores of similar size shear against each other) and attrition (relatively big ores grind smaller materials) (Austin, 2002; Le Pham, 2011; Wills and Napier-Munn, 2015).Comminution is well known to be highly energy-intensive. Previous studies have shown that comminution typically accounts for 50% of the energy consumption in a mineral processing circuit, and globally comminution activity accounts for about 0.2% of the world's electricity supply (Napier-Munn et al., 1999; Ballantyne and Powell, 2014). In addition, the process has been shown to be inefficient, in that a small fraction of the energy supplied is directly utilised for rock breakage (Tromas, 2008). The remaining energy is either lost as heat (Radziszewski, 2013), carbon dioxide (CO2) emissions (Norgate and Haque, 2010) or absorbed by the comminution equipment causing wear and degradation (Weerasekara et al., 2013).

Autor

Professor Jacks is a leading expert in mineral processing, with a distinguished career dedicated to optimizing the efficiency and sustainability of extracting valuable materials from the earth. Their particular area of expertise lies in comminution, the crucial process of breaking down large rocks into progressively smaller particles for further processing. "From Blasting to Grinding: The Different Stages of Ore Breakage in Comminution" represents Professor Jacks' culmination of years spent researching and refining the various techniques used in ore comminution. Professor Jacks meticulously analyzes the entire process, from the initial use of controlled blasting to break down rock formations to the application of grinding mills that reduce particles to the desired size. Professor Jacks' passion extends beyond the purely technical aspects of comminution. They are a strong advocate for ensuring this critical process is conducted in an environmentally responsible manner. Professor Jacks' research explores ways to minimize energy consumption, reduce dust generation, and develop innovative crushing and grinding technologies that have a lower environmental footprint. Their writing is known for its clarity and ability to bridge the gap between complex engineering concepts and practical applications in the mining industry. In "From Blasting to Grinding," Professor Jacks embarks on a comprehensive exploration of the art and science of ore comminution. They delve into the specific mechanisms of each stage of the process, showcase advancements in crushing and grinding technologies, and explore the ongoing quest to make comminution more efficient, sustainable, and cost-effective. Professor Jacks' insightful analysis equips readers with a deep understanding of this fundamental aspect of mining and its role in supplying the raw materials that fuel our modern world.

Produktdetails

• Verlag: tredition
• Seitenzahl: 152
• Erscheinungstermin: 7. Juni 2024
• Englisch
• Abmessung: 234mm x 155mm x 11mm
• Gewicht: 263g
• ISBN-13: 9783384253439
• ISBN-10: 3384253434
• Artikelnr.: 70928444