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首页> 外文期刊>Environmental Science & Technology >Ore Grade Decrease As Life Cycle Impact Indicator for Metal Scarcity: The Case of Copper
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Ore Grade Decrease As Life Cycle Impact Indicator for Metal Scarcity: The Case of Copper

机译：矿石品位下降作为金属稀缺性的生命周期影响指标：以铜为例

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摘要

In the life cycle assessment (LCA) of products, the increasing scarcity of metal resources is currently addressed in a preliminary way. Here, we propose a new method on the basis of global ore grade information to assess the importance of the extraction of metal resources in the life cycle of products. It is shown how characterization factors, reflecting the decrease in ore grade due to an increase in metal extraction, can be derived from cumulative ore grade-tonnage relationships. CFs were derived for three different types of copper deposits (porphyry, sediment-hosted, and volcanogenic massive sulfide). We tested the influence of the CF model (marginal vs average), mathematical distribution (loglogistic vs loglinear), and reserve estimate (ultimate reserve vs reserve base). For the marginal CFs, the statistical distribution choice and the estimate of the copper reserves introduce a difference of a factor of 1.0-5.0 and a factor of 1.2-1.7, respectively. For the average CFs, the differences are larger for these two choices, i.e. respectively a factor of 5.7-43 and a factor of 2.1-3.8. Comparing the marginal CFs with the average CFs, the differences are higher (a factor 1.7-94). This paper demonstrates that cumulative grade-tonnage relationships for metal extraction can be used in LCA to assess the relative importance of metal extractions.
机译：在产品的生命周期评估（LCA）中，金属资源的稀缺性目前正在初步解决。在此，我们基于全球矿石品位信息提出了一种新方法，以评估金属资源开采在产品生命周期中的重要性。结果表明表征因素如何反映出由于金属提取量增加而导致的矿石品位下降，是如何从累积的矿石品位-吨位关系中得出的。 CFs源自三种不同类型的铜矿床（斑岩，沉积物和火山成因的块状硫化物）。我们测试了CF模型（边际与平均），数学分布（对数与对数线性）和储量估计（最终储量与储量基础）的影响。对于边际CFs，统计分布选择和铜储量估计值的差异分别为1.0-5.0和1.2-1.7。对于平均CF，这两个选择的差异较大，即分别为5.7-43和2.1-3.8。将边际CF与平均CF进行比较，差异会更大（系数为1.7-94）。本文证明了金属提取的累积品位-吨位关系可用于LCA中以评估金属提取的相对重要性。

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  • 来源
    《Environmental Science & Technology》 |2012年第23期|12772-12778|共7页
  • 作者

    Marisa D. M. Vieira; Mark J. Goedkoop; Per Storm; Mark A. J. Huijbregts;

  • 作者单位

    PRe Consultants bv, Printerweg 18, NL-3821 AD Amersfoort, The Netherlands;

    PRe Consultants bv, Printerweg 18, NL-3821 AD Amersfoort, The Netherlands;

    Kopparberg Mineral AB, Verkstadsvaegen 52, S-714 36 Kopparberg, Sweden;

    Department of Environmental Science, Faculty of Science, Radboud University Nijmegen, P.O. Box 9010, NL-65OO GL Nijmegen, The Netherlands;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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  • 正文语种 eng
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