Tracking effective measures for closed-loop recycling of automobile steel in China.
Tracking effective measures for closed-loop recycling of automobile steel in China.
复制标题
跟踪我国汽车钢闭环回收利用的有效措施。
DOI：
10.1016/j.resconrec.2014.03.006
复制
发表时间：
2014
影响因子：
13.2
通讯作者：
Kiyotaka Tahara
中科院分区：
文献类型：
--
作者：
Hiroki Hatayama;Ichiro Daigo;Kiyotaka Tahara
由于对杂质的容忍度低，以及使用各种类型的钢铁产品的复合材料，汽车中的钢材的闭路回收尤其困难。必须开发减少杂质或提高杂质容忍度的技术，并在适当的时候将其引入钢材回收系统。本研究以中国为例，对汽车行业实施闭环回收的可行性进行了评估。采用材料夹点分析方法，结合汽车制造用钢板生命周期的动态模拟，估算了可用于闭路回收的废钢数量和废钢中的铜污染量。结果表明，到2050年，由于铜污染严重，每年产生的旧钢板中有一半以上将不得不进行向下回收。然而，对缓解铜污染问题的三种技术的情景分析表明，有可能增加闭路循环中使用的旧废料的数量。特别是，提高钢铁生产过程中的铜容忍度，无论是现在还是2050年都可能有效。
Closed-loop recycling of steel in automobiles is particularly difficult because of the low tolerance for impurities and the use of composites of various types of steel products. Technologies that reduce impurities or increase impurity tolerance must be developed and introduced to the steel recycling system at the appropriate time. This study evaluated the feasibility of closed-loop recycling in the automobile industry in China. Material pinch analysis combined with dynamic modeling of the life cycle of steel sheets used in the manufacture of automobiles was employed to estimate the amount of steel sheet scrap available for closed-loop recycling and the amount of copper contamination in the scrap. The results indicate that by 2050, more than half of the old steel sheet scrap generated annually will have to be down-cycled because of its high copper contamination. However, scenario analyses of three types of technologies for mitigating the problem of copper contamination showed the potential for increasing the amount of old scrap used in closed-loop recycling. In particular, improving copper tolerance in the steel production process could be effective both now and in 2050.