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首页> 外文会议>Sixth International Conference on Environmental Issues and Management of Waste in Energy and Mineral Production Swemp 2000, May 30-Jun 2, 2000, Calgary, Alberta >The role of LCA in performance assessment in minerals processing -A copper case study
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The role of LCA in performance assessment in minerals processing -A copper case study

机译：LCA在矿物加工性能评估中的作用-铜的案例研究

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摘要

This paper demonstrates the use of Life Cycle Assessment (LCA) as a basis for assessing potential environmental performance in the minerals industry through a copper case study. The case study is sourced from a demonstration plant of a hydrometallurgical process that converts copper sulfides and oxides to LME Grade A copper using a leach / electrowinning technology. The life cycle approach is supported by a sequential leach extraction protocol to better quantify the potential mobility of metals and complementary anions from solid waste residues. Sequential leach tests showed that the majority of iron and sulfur, the main components of these residues, are unlikely to mobilize under waste deposit conditions. This information was used to modify the potential burdens predicted using conventional LCA practice, giving a more realistic view of the overall potential impact associated with this process. Certain environmental effect scores were sensitive to changing process conditions; the eco-toxicity indicator was affected by changing process feed composition, whilst the global climate change indicator (greenhouse effect) was affected by changes to the current density for electrowinning.
机译：本文演示了使用生命周期评估（LCA）作为通过铜案例研究评估矿产行业潜在环境绩效的基础。案例研究来自湿法冶金示范工厂，该工厂使用浸出/电解沉积技术将硫化铜和氧化物转化为LME A级铜。生命周期方法由顺序浸提方案支持，可以更好地量化固体废物残留物中金属和互补阴离子的潜在迁移率。连续浸出试验表明，这些残留物中的主要成分铁和硫的大部分在废物沉积条件下不太可能迁移。该信息用于修改使用常规LCA惯例预测的潜在负担，从而更实际地了解与此过程相关的整体潜在影响。某些环境影响评分对变化的工艺条件敏感；生态毒性指标受工艺进料组成变化的影响，而全球气候变化指标（温室效应）受电积电流密度变化的影响。

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