原镁和镁合金的环境影响分析.pdfVIP

L10 原镁及镁合金的环境影响分析 沈万霞 高 峰 王志宏 （北京工业大学 材料科学与工程学院，北京 100022） 摘要：本文运用生命周期评价方法（Life Cycle Assessment, LCA ），并结合镁工业在节能降耗方面的技术进展，定量评价 了2009年我国原镁和镁合金生产过程的资源、能源消耗及其主要污染物的排放。研究表明，我国皮江法炼镁在提高能源 利用效率和环保治理等方面取得了长足的进步，特别是还原过程节能技术的应用对于污染物减排起到了关键作用。与2005 年相比较，2009年原镁过程的不可再生资源消耗和温室效应均有显著的降低。其中，温室效应的影响与2005年相比下降 了约三分之一。通过系统边界的延伸，进一步研究了气体保护法生产 AM60 镁合金的环境负荷，并分析了原镁和原铝在 镁合金生产过程中的环境负荷积累效应。结果表明，原镁生产过程的环境负荷在镁合金生产的积累环境负荷中起到了决 定性的影响。 关键词：生命周期评价；镁冶炼；环境影响；镁合金 Environment impact analysis of primary magnesium and magnesium alloy SHEN Wanxia, GAO Feng，WANG Zhihong (College of Materials Science and Engineering, Beijing University of Technology, Beijing 100022, China) Abstract: Based on the production status of 2009 and combined with the development of energy-saving technology, a quantitative analysis and evaluation of resources consumption, energy consumption and pollutant emissions caused by magnesium production using the Pidgeon process in China was carried out according to the theory and framework of life cycle assessment. The result shows that the Pidgeon process has made great process in improving energy efficiency and environmental governance. Be applied to the reduction process, the energy saving in particular play a key role in the reduction of pollutant emission. Compared to the production status of 2005, the results showed, the production of primary magnesium in 2009 has a sharply reduce in terms of ADP, GWP and AP. Among them, the impact of GWP fell by a third. Expanding the system boundary, this research carries out the environmental load analysis on the technologies of producing magnesium alloy with gas protection, and calculates the cumulative environment load of the primary magnesium and primary aluminum. The result shows that, the environment load brought by pri