Life cycle assessment of secondary aluminium refining
Life cycle assessment of secondary aluminium refining
复制标题
再生铝精炼的生命周期评估
DOI：
10.1007/978-3-319-48144-9_150
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
J. Hammervold
中科院分区：
文献类型：
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作者：
Gro Gilstad;J. Hammervold
本文介绍了用于精炼消费后铝废料的各种技术的生命周期评估（LCA）。目标是确定相关精炼技术与原铝生产相比的环境绩效。该评估基于给定的废料成分和给定的纯度限制，以满足目前由原铝生产的某种铝产品的技术要求。从环境角度来看，低温电解和分级结晶是优选的精炼方法。这是因为这些方法的能源使用量较低，而对环境的影响主要是由精炼过程中使用的能源造成的。由于评估是基于特定的废料成分和特定的纯度要求，因此建议研究减少环境影响的其他可能性，例如更好的分类工艺或生产更适合回收的变形合金。当铝的使用量进一步增加并且建立了更稳定的废料来源时，这些方法可能会更有意义。
This paper presents a life cycle assessment (LCA) of various technologies for refining of post-consumer aluminum scrap. The goal is to identify the environmental performance of relevant refining technologies compared to the production of primary aluminum. The assessment is based on a given scrap composition and given purity limits to meet the technical requirements of a certain aluminum product which is currently produced from primary aluminum. From an environmental perspective lowtemperature electrolysis and fractional crystallization are the preferred refining methods. This is due to the low energy use in these methods, and that the environmental impact is mainly caused by the energy used during refining. Since the assessment is based on a specific scrap composition and specific purity requirements, it is suggested that other possibilities to reduce environmental impacts are investigated, for example better sorting processes or production of wrought alloys more suitable for recycling. Such methods are likely to be more relevant when the use of aluminum has increased even further and more stable sources of scrap are established.