IUVSTA 15th International Vacuum Congress (IVC-15), AVS 48th International Symposium (AVS-48), 11th International Conference on Solid Surfaces (ICSS-11)
    Vacuum Science & Technology Friday Sessions
       Session VST+MS-FrM

Paper VST+MS-FrM6
Disassembling and Materials Recovering Process of Zinc-Carbon battery by Vacuum Aided Recycling Systems Technology

Friday, November 2, 2001, 10:00 am, Room 125

Session: Semiconductor & Functional Coating Systems & Processes
Presenter: Y. Saotome, Gunma University, Japan
Authors: Y. Saotome, Gunma University, Japan
Y. Nakazawa, Kokushikan University, Japan
Y. Yamada, Nagata Seiki Co., Ltd., Japan
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Every material has its own vapor pressure and the principle of VARS Tech. is based on sorting and recovering a specific material from the midst of other combined products through evaporation in a vacuum and the use of different evaporation temperatures for each material.@footnote 1@ In the present paper, VARS Tech. has been applied to the recycling of used batteries. Zinc-Carbon battery R20PU was selected as a specimen and was heated by radiation through vacuum vessel wall made of glass. The resulting relationship between vacuum pressure, reduction in mass and the temperature during heating indicates the occurrence of some evaporation. For the analyses of these complex phenomena, similar experiments were carried out on each component and material of the battery. As a result, at the temperature of about 450K, PVC insulation ring at the top of the battery becomes warped and then water(solution) is evaporated from the inside of battery. From the aspect of recycling process, softening and decomposition phenomenon of PVC insulation ring is correspond to the beginning of disassembling of battery as an assembled product. Actually, disassembling process is accelerated by the evaporation of ZnCl@sub 2@ and can-zinc above about 700K. After the vacuum thermal cycle, the specimen is disassembled and comes to parts such as jacket-metal, some plate metals, an electrode-carbon and positive reactant in powder state. As shown above, the vacuum-aided recycling method is a process that consists of disassembling, sorting, and recovering materials. As shown above, vacuum aided recycling technology has superior characteristics as a restoration systems technology of EcoFactory. As shown above, vacuum aided recycling technology has superior characteristics as a restoration systems technology of EcoFactory. @FootnoteText@ @footnote 1@ Y.Saotome, Y.Nakazawa and Y.Yamada, Vacuum, 53(1999), 101-104.