The Separation of Aluminum and Stainless-Steel Scraps Using Vibrating Mixed-Size Ball Bed
| Autor: | Manis Kumar Jha, Kyoungkeun Yoo, Hyunjin Na, Carlito Baltazar Tabelin |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
lcsh:TN1-997
Materials science zirconia ball Metallurgy 0211 other engineering and technologies Metals and Alloys dry gravity separation chemistry.chemical_element stainless steel scrap Scrap Vibration amplitude 02 engineering and technology 021001 nanoscience & nanotechnology chemistry aluminum scrap Aluminium Ball (bearing) General Materials Science Cubic zirconia 0210 nano-technology lcsh:Mining engineering. Metallurgy 021102 mining & metallurgy Gravity separation |
| Zdroj: | Metals Volume 10 Issue 7 Metals, Vol 10, Iss 868, p 868 (2020) |
| ISSN: | 2075-4701 |
| DOI: | 10.3390/met10070868 |
| Popis: | Dry gravity separation using a vibrating zirconia ball bed is proposed in this study to separate aluminum (Al) and stainless steel (STS) scraps obtained from spent hard disk drive recycling. The effects of zirconia ball sizes and vibrating power (vibration amplitude) on the separation efficiency of Al and STS scraps were investigated. The zirconia balls moved down at the center of the vessel and rose with the wall during the vibration test. Although more STS scraps sunk than Al scraps did, the separation efficiency was not maintained because Al scraps also sunk along with balls&rsquo movement. The separation efficiency increased to 86.6% using 1-mm zirconia balls with a 2.5-mm vibration amplitude at 4 min, but it decreased rapidly by ball moving. Therefore, when a ball bed of mixed sizes (2:1 ratio of 1 and 3 mm) was used and arranged, whereby the 3-mm zirconia balls were above the 1-mm ball bed, the separation efficiency increased to 100% for more than 2 min. This dramatic improvement was because the 3-mm ball bed acted as a barrier to prevent sunken STS scraps from rising, and Al scrap cannot sink through the 3-mm ball bed. These results indicate that the separation of Al and STS scraps could be achieved successfully using the dry gravity separation method. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|