Development of Advanced Mineral Processing, Material Recycling and Waste Water Treatment Technology for establishment of Urban Mines

日本的工业系统和日常生活正在向循环型社会转变，以减少能源和资源消耗。为了建立一个基于回收的社会，城市资源回收中心（矿山）是减少废物量的重要场所，通过应用矿物加工技术再利用和回收有价值的材料。作者研究了城市矿山选矿的应用，1）开发了从废弃复印机中回收塑料和金属的工艺，并使用本实验室开发的TACUB跳汰机建造了加工中试工厂。2）开发了从焚烧固体废弃物的熔融工厂中回收金属的工艺，并使用硫化-硫化法。采用低温选择性破碎和三级磁选工艺，从混合动力汽车废镍基混合动力电池中回收电极材料;采用TACUB跳汰机和多重分选机，从废混凝土中回收细骨料、粗骨料和水泥水化物粉;采用硫还原菌，开发含锰废水的深度处理工艺。提出了一种修复重金属污染土壤的微胶囊化方法。

Industrial systems and daily life in Japan are shifting to a recycling-based society to reduce energy and resource consumption. To establish a society based on recycling urban resource recovery centers (mines) are important as places to reduce waste volumes, reusing and recycling valuable materials with application of mineral processing technology. The authors have studied applications of mineral processing in urban mines, and developed new methods and processes as described below.1)A process for recycling of plastics and metals from scrapped copy machines was developed and the processing pilot plant was constructed using the TACUB jig developed in our laboratory.2)A metal recovery process from melting plants of incinerated municipal-solid waste was developed using a leaching-sulfudization method.3)A process recovering electrode materials from waste nickel metal hybrid batteries in a hybrid vehicle was developed using selective crushing at low temperature and 3 stages magnetic separation.4)A process recovering fine and coarse aggregate and cement hydrate powder from waste concrete was developed using TACUB jig and multi-gravity separator.5)An advanced process to treat wastewater containing manganese was developed using sulfur reducing bacteria.6)A microencapsulation method to remediate soils contaminated by heavy metals was developed.