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Research on Recycling and Resouae Recovery of Solid Wastes by Hydrothermal Nano-Process

纳米水热法固体废物资源化利用研究

基本信息

批准号：
18201012
负责人：
ITOH Hideaki
金额：
$ 29.29万
依托单位：
Nagoya University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (A)
财政年份：
2006
资助国家：
日本
起止时间：
2006 至 2007
项目状态：
已结题

项目摘要

Today, the resource depletion is one of the important issues of all over the world. In order to solve this issue, the higher-efficiency techniques for resource recovery from various solid wastes such as ceramics would be required. However, there are no techniques for recovering the variable resources from solid wastes, especially, ceramics, because most ceramics have relatively high stability for heat, mechanical stress and so on. In this research, we investigated on the development of the higher-efficiency techniques for valuable resource from ceramics such as cemented carbides, zirconia and magnet by the hydrothermal nano-process. To show that hydrothermal nano-process technique we proposed is one of key-technologies for solving the resource recovery issues, we investigated the following topics :1.Hydrothermal mechanochemical nano-process2.Hydrothermal oxidation nano-process3.Hydrothermal mineralization nano-processAs a result of this research, we succeeded in recovering valuable res … More ources from the following wastes :1.WO_3 powder and aqueous solution with Co ions were separated from WC-Co cemented carbide cutting tools by the hydrothermal oxidation treatment with acid aqueous solution.2.Zrconia powder for sintering with yttrium was recovered from spent partially stabilized zirconia sintered compact by the hydrothermal and mechanochemical treatment.3.Ferrite particles consisted of Fe and Mn could be recovered from spent toner carrier powder by the hydrothermal oxidation treatment with H_2O_2.4.Neodymium oxalate was recovered from spent Nd-Fe-B permanent sintered magnet by the hydrothermal oxidation treatment with HC1 and oxalic acid.5.Co-A1 composite-oxide could be recovered from spent cathode of the Li-secondary battery by the hydrothermal oxidation treatment.6.Natural minerals could be recovered from wastewaters with various oxo-anions such as boron, fluorine, arsenic, etc. by the hydrothermal mineralization treatment with mineralizer such as hydrated lime and calcium chloride. Less

资源枯竭是当今世界面临的重要问题之一。为了解决这一问题，需要从各种固体废物（如陶瓷）中回收资源的更高效技术。然而，目前还没有从固体废物中回收可变资源的技术，特别是陶瓷，因为大多数陶瓷具有相对较高的热稳定性，机械应力等，在本研究中，我们研究了开发更高效的技术，从陶瓷，如硬质合金，氧化锆和磁铁的有价值的资源，通过水热纳米过程。为了说明我们提出的水热纳米处理技术是解决资源回收问题的关键技术之一，我们研究了以下几个方面：1.水热机械化学纳米处理2.水热氧化纳米处理3.水热矿化纳米处理 ...更多信息从以下废物中去除：1.采用酸性水热氧化法从WC-Co硬质合金刀具中分离出WO_3粉末和含Co离子的水溶液; 2.采用水热-机械化学法从部分稳定氧化锆烧结体中回收含钇烧结用氧化锆粉末; 3.采用H_2O_2水热氧化法从废墨粉载体粉末中回收由Fe和Mn组成的铁氧体颗粒; 4.采用HCl和草酸水热氧化法从Nd-Fe-B永磁烧结体中回收草酸钕; 5. Co-Al复合材料-Al_2O_3-Al_3O_4-Al_2O_4-Al_3O_4-Al_3O_4-Al_2O_4-Al_3O_4-Al_4O_4-Al_3O_4-Al_4-Al_3O_4-Al_4-Al_2O_4-Al_4-Al_3O_4-Al_4-Al_4O_4-Al_4-Al_2O_4-Al_4-采用水热氧化法可以从锂二次电池废阴极中回收氧化物。6.采用熟石灰、氯化钙等矿化剂对含硼、氟、砷等多种含氧阴离子的废水进行水热矿化处理，可以回收天然矿物。少