TY - JOUR A1 - Sterling, David A1 - Breitung-Faes, Sandra A1 - Kwade, Arno T1 - Experimental evaluation of the energy transfer within wet operated stirred media mills JF - Powder Technology N2 - Wet-operated stirred media mills are commonly used in the field of fine and ultra-fine grinding. Depending on the application, there are different mill geometries and mill equipment materials of which the grinding chamber lining and the stirrer are made. Polyurethane and ceramics are frequently implemented materials. Besides the process-relevant effects such as cooling and wear prevention, an energy efficient mill operation is intended, which can be achieved, by using mechanistic stress models. Here, besides the mill geometry, the process parameters, various energy-transfer-coefficients are also determined. In this work, the effect of different mill equipment materials on the mill-related-energy-transfer-coefficient are investigated by experiments while operating different mills only with water and grinding media but without feed material. It was found that the mill equipment material has a significant effect on the power consumption and thus, the energy transfer within the mill as a result of friction between different materials. KW - Stirred media mill KW - Grinding chamber and stirrer materials KW - Advanced stress model KW - Energy transfer coefficient KW - Energy efficiency Y1 - 2023 U6 - https://doi.org/10.1016/j.powtec.2023.118579 SN - 0032-5910 VL - 425 PB - Elsevier BV ER - TY - JOUR A1 - Sterling, David A1 - Breitung-Faes, Sandra A1 - Kwade, Arno T1 - Improved energy transfer model for mechanistic scale-up of stirred media mills JF - Powder Technology N2 - Wet-operated stirred media mills are commonly used in the field of fine and ultra-fine grinding. Depending on the application, there are different mill geometries, sizes and mill equipment materials of which the grinding chamber lining and the stirrer are made. Increasing energy prices demand an energy-efficient mill operation for a desired product, which can be achieved with mechanistic stress models. Here, besides the mill geometry and volume, the process parameters and various energy-transfer-coefficients are of importance. In this work, the impact of different mill equipment materials affecting the mill-related-energy-transfer-coefficients on performance prediction and scale-up using the advanced stress model are investigated. It was found that the mill-related-energy-transfer-coefficients as well as the improved grinding-media-energy-transfer-coefficients have a significant effect on the prediction precision of the comminution times and specific energies for chosen target particle sizes. KW - Stirred media mill KW - Scale up KW - Mechanistic model KW - Mill equipment materials KW - Advanced stress model KW - Energy transfer coefficient KW - Energy efficiency Y1 - 2024 U6 - https://doi.org/10.1016/j.powtec.2024.119978 SN - 0032-5910 VL - 444 PB - Elsevier BV ER -