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Development of suitable product recovery systems of continuous hybrid jig for plastic-plastic separation
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| Title: | Development of suitable product recovery systems of continuous hybrid jig for plastic-plastic separation |
| Authors: | Ito, Mayumi Browse this author →KAKEN DB | | Saito, Ayumu Browse this author | | Murase, Nana Browse this author | | Phengsaart, Theerayut Browse this author | | Kimura, Shoko Browse this author | | Tabelin, Carlito Baltazar Browse this author | | Hiroyoshi, Naoki Browse this author →KAKEN DB |
| Keywords: | Recycling | | Jig | | Hybrid jig | | Continuous jig | | Plastic |
| Issue Date: | Sep-2019 |
| Publisher: | Elsevier |
| Journal Title: | Minerals engineering |
| Volume: | 141 |
| Start Page: | 105839 |
| Publisher DOI: | 10.1016/j.mineng.2019.105839 |
| Abstract: | A modified jig called the hybrid jig was recently developed to separate mixed-plastics with similar specific gravities effectively using the concepts of bubble attachment, surface wettability and gravity separation. This method was effective in a batch-type jig setup, but when applied to a continuous-type jig setup, the efficiency of the process dramatically decreased. This drop in efficiency was attributed to the unintended negative effects of air bubbles on separation especially close to the screw-type extractor at the product end though this type of product recovery system was successfully applied to the RETAC and reverse jigs. To address this problem, a better product recovery system for continuous-type hybrid jig is proposed in this study, and the effects of air injection rate at different positions of the hybrid jig separation chamber were evaluated. The results showed that fluidization behavior of particles in the hybrid jig was influenced by not only water pulsation but also the rising motion of air bubbles. To improve the purity of heavy materials in the bottom layer products, two product recovery systems are proposed: (1) a screw-type extractor with one "separating" single-screen, and (2) a screw-type extractor with modified air injection and water pulsation (i.e., upward flow period was shortened). |
| Rights: | © 2019. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/ | | http://creativecommons.org/licenses/by-nc-nd/4.0/ |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/82578 |
| Appears in Collections: | 工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 伊藤 真由美
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