Novel Evaluation Method of Quality of Material in Urban Ore in terms of Total Material Requirement

本研究将城市矿石回收利用化学元素的总物料需要量（TMR）（城市矿石TMR， UOTMR）与天然矿石冶炼提取化学元素的总物料需要量（TMR, NO-TMR）进行比较，以期与天然矿石同等评价城市矿石品位。在NO-TMR框架的基础上，建立了UO-TMR框架。对报废家用电器的UO-TMR进行了首次估算和评估。使用情景分析进行估算，其中考虑到用于高级回收的额外能源，改变了回收元素和/或材料的数量。对四种类型的日本建筑材料的tmr进行了估算，并评估了回收材料（如由废料制成的钢）的功能增加与创造功能增加所需的额外能源和材料投入之间的权衡。在对资源依附性指标进行国别分析的基础上，提出了利用资源依附性指标评价资源依附性综合指标的新方法。

In this study, the total materials requirement (TMR) to recycle chemical elements from the urban ore by recycling (urban ore TMR, UOTMR) has been compared with the TMR to extract the element from the natural ore by smelting (nat ural ore TMR, NO-TMR) in order to evaluate the urban ore grade on an equal footing with the natural ore. A framework of UO-TMR based on the NO-TMR framework is developed. The UO-TMR for end-of-life electric home appliances have been first estimated and evaluated. The estimation were carried out using scenario analyses, in which the number of recycled elements and/or materials was changed considering additional energy for advanced recycling. The TMRs for the recycling of materials from four types of Japanese buildings have been also estimated and the trade-off between the increase in function of recycled materials such as steel made from scrap and the additional inputs of energy and materials required to create the increase in function were evaluated. A novel method to evaluate an integrated indicator for resource dependency by using TMR has been finally developedfrom the country-by-country breakdown analyses of TMR.