Determination of metal-abundant high-density particles in municipal solid waste incineration bottom ash by a series of processes : Sieving, magnetic separation, air table sorting, and milling
Copyright © 2020 Elsevier Ltd. All rights reserved.
| Publié dans: | Waste management (New York, N.Y.). - 1999. - 112(2020) vom: 01. Juli, Seite 11-19 |
|---|---|
| Auteur principal: | |
| Autres auteurs: | , |
| Format: | Article en ligne |
| Langue: | English |
| Publié: |
2020
|
| Accès à la collection: | Waste management (New York, N.Y.) |
| Sujets: | Journal Article Air table Bottom ash Density MSW Metal recycling Coal Ash Metals Metals, Heavy Solid Waste |
| Résumé: | Copyright © 2020 Elsevier Ltd. All rights reserved. Valuable non-ferrous (NFe) metals are contained in municipal solid waste incineration (MSWI) bottom ash (BA). The applicability of an air table for separating NFe metal-abundant particles in MSWI BA (<8 mm) was studied. A stepwise separation procedure was developed based on the performance tests of the air table conducted by changing three variables (air injection, vibration, and end slope). As a result of the stepwise separation, six bulk density ranges (<0.7 to >1.1 g/cm3 at intervals of 0.1 g/cm3) were prepared from non-magnetic fractions with four size ranges (4-8, 2-4, 1-2, and 0.5-1 mm). The effectiveness of air table sorting was evaluated based on dry particle density and proportion of metals. NFe metals were obtained by sieving (>0.5 mm) after a ball mill process, confirming that NFe metals accounted for 3.2% of the < 8 mm MSWI BA. The highest particle density of each size fraction and the proportion of NFe metals in the fractions were 3.19 g/cm3 and 59.9% (4-8 mm), 2.97 g/cm3 and 28.8% (2-4 mm), 2.78 g/cm3 and 10.4% (1-2 mm), and 2.87 g/cm3 and 4.4% (0.5-1 mm). In the 0.5-2 mm particles, the highest density fraction contained 68.7% of the NFe metals, which were expected to be recovered by applying an air table separator to MSWI BA 0.5-2 mm |
|---|---|
| Description: | Date Completed 17.06.2020 Date Revised 17.06.2020 published: Print-Electronic Citation Status MEDLINE |
| ISSN: | 1879-2456 |
| DOI: | 10.1016/j.wasman.2020.05.002 |