Development of methodology for estimating recoverable reserves of urban mine

城市矿山可回收量是指城市矿山可回收利用的物质存量。评估了过去20年中每年金属材料的报废回收率。时间序列EoL-RR显示出超过20%的偏差。高EoL-RR出现在材料价格高的时期，预计这是由材料库存的冬眠行为造成的。城市矿山按可回收性分为四类，例如待回收物料、消散物料、嵌入于不可回收的废弃物产品中的物料及不可从已回收废弃物产品中释放的物料。第四类的证据是在电弧炉钢中发现的贵金属。作为城市矿山可回收性的总结知识，从EoL产品回收链中进行过程所需的条件树。

Recoverable urban mine was defined as the amounts of material stock which can be going to be recycled. End-of-life recycling rates of metallic materials for each year in the past two decades were evaluated. The time-series EoL-RR showed a deviation of more than twenty percent. High EoL-RRs were shown during a period when prices of the material are high, which were expected to be caused by hibernating behavior of material stock. Four category of Urban mine were classified in terms of recoverability; such as materials to be recovered, dissipated materials, materials embedded in EoL products not to be recovered and materials not to be liberated from recovered EoL products. The evidence of the fourth category was found as precious metals in electric arc furnace steel. As summarizing knowledge of recyclability of urban mine, the tree of conditions which required for conducting processes in the chain of recycling from EoL products.