| Autor: |
Kovár, Filip, Bartoňová, Lucie, Kostura, Bruno |
| Předmět: |
|
| Zdroj: |
AIP Conference Proceedings; 2023, Vol. 2672 Issue 1, p1-5, 5p |
| Abstrakt: |
Magnetite suspensions are widely used in heavy media separations but as being quite expensive, cheaper alternatives are still being sought. Various materials were tested as a substitution of magnetite, from which those possessing magnetic properties are more advantageous due to their feasible magnetic separation. Moreover, as huge amounts of industrial wastes are produced annually, there is an effort to use them in accordance with circular economy approach. There are several requirements for such solid materials that are to be met, such as the stability of heavy media suspension that directly affects the (coal) separation performance, which can be somewhat problematic to ensure, namely in low-density separations. Therefore, the study evaluates the stability of the heavy media suspensions based on metallurgical wastes (two electric arc furnace dusts and two iron scale samples) that were tested as a substitution of magnetite. Promising results (in terms of industrial utilization) was obtained for 0.045-0.053 mm iron scale and for 0.045-0.053 mm and > 0.045 mm electric arc furnace dusts. The settling rate of the former sample (2.68 cm/min) fall exactly within the recommended industrial range of 2-6.5 cm/min. The settling rates of both electric arc furnace samples were even slightly lower (0.18 and 0.42 cm/min) providing even more stable suspensions, which can be advantageous (e.g.) for their use in cyclone separators. The only waste sample that did not provide a stable suspension was > 0.053 mm iron scale, namely due to coarse and quite variable (assorted) particle size. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
|
