Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.9/388
Título: Exergy cost of mineral resources
Autor: Rosa, Rui Namorado
Rosa, Diogo R. N.
Palavras-chave: Exergy entropy; mineral resources; ore grade; recovery ratio; concentration.
Entropy
Mineral resources
Ore grade
Recovery ratio
Concentration
Data: 2008
Citação: Rosa, Rui Namorado; Rosa, Diogo R. N. Exergy cost of mineral resources. In: International Journal of Exergy, Vol. 5, nºs 5-6, 2008, p.535-555.
Resumo: Mineral deposits are considered as natural capital whose value can be assessed in exergy terms. Historical industry experience provides evidence that exploitation of mineral deposits and the beneficiation of ores are essentially energy intensive. The persisting decline of the grade of the developed deposits demands increasing exergy replacement and processing costs. The results demonstrate how far processed ores and concentrates are from ideal behaviour, and technologies from reversibility conditions. The exploitation of mineral resources of declining quality for mineral commodities imply a long time trend of increasing mass and exergy inputs spent per unit product output, in line with a law of ‘diminishing returns’ on invested exergy.
URI: http://hdl.handle.net/10400.9/388
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