Ιδρυματικό Αποθετήριο
Πολυτεχνείο Κρήτης
Πολυτεχνείο Κρήτης
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| URI | http://purl.tuc.gr/dl/dias/4BAE2D1D-9A14-4A8B-84C1-EC18A01EAFE2 | - |
| Αναγνωριστικό | https://doi.org/10.3390/min12020184 | - |
| Αναγνωριστικό | https://www.mdpi.com/2075-163X/12/2/184 | - |
| Γλώσσα | en | - |
| Μέγεθος | 17 pages | en |
| Τίτλος | Effect of grinding media size on ferronickel slag ball milling efficiency and energy requirements using kinetics and attainable region approaches | en |
| Δημιουργός | Petrakis Evaggelos | en |
| Δημιουργός | Πετρακης Ευαγγελος | el |
| Δημιουργός | Komnitsas Konstantinos | en |
| Δημιουργός | Κομνιτσας Κωνσταντινος | el |
| Εκδότης | MDPI | en |
| Περίληψη | The aim of this study is to evaluate the effect that the size of grinding media exerts on ferronickel slag milling efficiency and energy savings. A series of tests were performed in a laboratory ball mill using (i) three loads of single size media, i.e., 40, 25.4, and 12.7 mm and (ii) a mixed load of balls with varying sizes. In order to simulate the industrial ball milling operation, the feed to the mill consisted of slag with natural size distribution less than 850 μm. Grinding kinetic modeling and the attainable region (AR) approach were used as tools to evaluate the data obtained during the ball milling of slag. Particular importance was given to the determination of the specific surface area of the grinding products, the identification of the grinding limit, and the maximum specific surface area which could be achieved when different grinding media sizes were used. The results showed that, in general, the breakage rates of particles obey non-first-order kinetics and coarse particles are ground more efficiently than fines. The AR approach proved that there is an optimal grinding time (or specific energy input) dependent on the ball size used for which the volume fraction of the desired size class is maximized. The use of either 25.4 mm balls or a mixed load of balls with varying sizes results in 31 and 24% decrease in energy requirements, compared to the use of balls with small size (12.7 mm). | en |
| Τύπος | Peer-Reviewed Journal Publication | en |
| Τύπος | Δημοσίευση σε Περιοδικό με Κριτές | el |
| Άδεια Χρήσης | http://creativecommons.org/licenses/by/4.0/ | en |
| Ημερομηνία | 2023-08-24 | - |
| Ημερομηνία Δημοσίευσης | 2022 | - |
| Θεματική Κατηγορία | Ball size effect | en |
| Θεματική Κατηγορία | Slag | en |
| Θεματική Κατηγορία | Grinding | en |
| Θεματική Κατηγορία | Kinetic modeling | en |
| Θεματική Κατηγορία | Specific surface area | en |
| Θεματική Κατηγορία | Energy requirements | en |
| Θεματική Κατηγορία | Specific energy | en |
| Θεματική Κατηγορία | Attainable region approach | en |
| Βιβλιογραφική Αναφορά | E. Petrakis and K. Komnitsas, “Effect of grinding media size on ferronickel slag ball milling efficiency and energy requirements using kinetics and attainable region approaches,” Minerals, vol. 12, no. 2, Jan. 2022, doi: 10.3390/min12020184. | en |
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