Article
Metallurgy & Metallurgical Engineering
Serkan Cayirli, Hasan Serkan Gokcen
Summary: This study investigated the dry grindability of calcite powders in a laboratory batch type stirred mill with vertical and horizontal orientations. Results showed that the d(50) values decreased and then increased with increasing stress energy, and the product size was finer for the horizontal orientation at the same stress energy value. This is the first study to compare mill orientation (vertical vs. horizontal) under the same test conditions.
MINING METALLURGY & EXPLORATION
(2021)
Article
Engineering, Chemical
Ann-Christin Boettcher, Carsten Schilde, Arno Kwade
Summary: The study aims to investigate the position, velocity, and radial circulation of individual grinding beads at different operation parameters in stirred media mills. The results can be used to validate DEM simulation results and provide important insights for studying fine grinding processes in stirred media mills.
ADVANCED POWDER TECHNOLOGY
(2021)
Article
Engineering, Chemical
Deyu Jiang, Lizhen Deng, Taotao Dai, Ruihong Liang, Wei Liu, Chengmei Liu, Changhong Li, Junzhen Zhong, Hongwen Zhong, Jun Chen
Summary: This study investigated the changes in particle characteristics, nutrient composition, and volatile components during the grinding process of matcha at various time intervals (20-140 min). The results showed that grinding time significantly affected the particle size, color, and aroma of the matcha powder. It also preserved the active polyphenols and amino acids and facilitated the formation of characteristic flavor substances. These findings suggest that the use of stirred media mills has potential for producing high-quality matcha.
Article
Geochemistry & Geophysics
Ugur Ulusoy, Serkan Cayirli, Guler Bayar, Hasan Serkan Gokcen
Summary: This study compared the effect of stirred and ball mill grinding on the particle shape of ground calcium carbonate (GCC), and found that the ball mill produced particles with higher aspect ratio values compared to the stirred mill. XRD and SEM analysis supported this conclusion. The physical properties of GCC particles, such as aspect ratio, surface area, and whiteness, were discussed based on their application areas.
Article
Geochemistry & Geophysics
Simon Larsson, Juan Manuel Rodriguez Prieto, Hannu Heiskari, Par Jonsen
Summary: Modeling wet stirred media mill processes involves complex multiphysics interactions, which are successfully tackled in this study by developing a multiphysics model for an HIG5 pilot vertical stirred media mill. The model uses a particle-based coupled solver approach and loose two-way couplings between different constituents. Numerical results show good agreement with experimental measurements, predicting mill power consumption and dynamics of grinding media and fluid accurately.
Article
Engineering, Chemical
T. Santosh, C. Eswaraiah, Rahul K. Soni, Shravan Kumar
Summary: In this study, experiments were conducted to reduce the size of PGE bearing chromite ore using HPGR, ball mill, and stirred mill. The performance of HPGR was evaluated in two stages, and its operating variables were optimized. The crushed product of HPGR was further ground in a ball mill and stirred mill, and a comparative analysis of their performance and energy consumption was conducted. It was found that the stirred mill produced a finer product with about 40% less energy consumption, indicating that the HPGR-stirred mill combination is a more energy-efficient grinding circuit.
ADVANCED POWDER TECHNOLOGY
(2023)
Article
Engineering, Chemical
Christian Hoefels, Regina Dambach, Arno Kwade
Summary: In the search for energy reduction potential in the energy-intensive industrial sector, a new development and optimization of process-determining parameters for a dry-operated agitated bead mill has been investigated. By adjusting operating and geometry parameters, specific energy consumption can be decreased from over 150 kWh/t to about 80 kWh/t, defining an optimal setup for machine operation.
MINERALS ENGINEERING
(2021)
Article
Engineering, Chemical
Wang Guo, Yuexin Han, Yanjun Li, Zhidong Tang
Summary: The wet grinding of iron ore powder using a stirred media mill was studied, and it was found that the particle size distribution of grinding products matched well with the RRB function. Operational parameters such as ball filling rates and stirrer tip speeds were investigated for their impact on PSD width and energy efficiency. An equation was established to predict PSD based on the RRB function and size-energy model, providing a good fit to grinding products under different conditions.
Article
Engineering, Chemical
Shicong Luo, Claus Erik Weinell, Soren Kiil
Summary: The purpose of this study is to develop a mathematical model for the dispersion of agglomerates in inorganic pigment concentrates. The population balance analysis includes three potential mechanisms, which are surface erosion, rupture, and re-agglomeration. Experimental data of transient agglomerate size distributions were measured to validate the model. The simulations show that surface erosion is the dominant mechanism in pigment dispersion.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Engineering, Chemical
Xiaolong Zhang, Yuexin Han, Yanjun Li, Wenbo Li, Jiancheng He, Jianping Jin
Summary: The study found that using a special ceramic-medium stirred mill can enhance the flotation recovery of silver. Compared to steel ball-medium stirred mill and ball mill, the performance of the special ceramic-medium stirred mill was better. The excellent flow characteristics of the ceramic medium contributed to the high liberation degree of silver minerals from gangue minerals.
Article
Agriculture, Dairy & Animal Science
Yanan Xu, Xinjiang Zhang, Taiyu Hui, Jiaming Sun, Weidong Cai, Guangyu Lin, Lingling Wang, Xingtang Dou, Zhanhong Wang, Di Han, Jiaming Wang, Yu Zhang, Yuting Qin, Ming Gu, Zhixian Bai, Yinggang Sun, Yanzhi Wu, Rui Chen, Zeying Wang
Summary: This study investigated the relationship between KRT26 and TCHH gene polymorphism and production performance in Liaoning cashmere goats, identifying that these genes were associated with cashmere fineness. The AA and GG genotypes were found to be preferred marker genotypes for cashmere fineness.
ANIMAL BIOTECHNOLOGY
(2021)
Article
Materials Science, Ceramics
Taewoo Kim, Yeon-Sook Lee, Dong-Won Lee, Da-Eun Hyun, Seung Hwa Jung, Keun Bong Lee, Jun Young Shin, Heesoo Lee, Yong-Nam Kim
Summary: Wear tests were conducted on yttrium-stabilized zirconia beads with diameters of approximately 100 μm to investigate their wear resistance characteristics. A novel method for monitoring wear state was proposed, which involved measuring the change in bead size over time to obtain the wear rate. The study found that the wear rate of the beads was largely influenced by the hardness of the outer region, as well as the phase fraction and grain size.
CERAMICS INTERNATIONAL
(2023)
Article
Engineering, Chemical
Alessandro L. R. de Oliveira, Rodrigo M. de Carvalho, Luis Marcelo Tavares
Summary: This study used the UFRJ mechanistic mill model and DEM to analyze the impact of various design and operational variables on the breakage rates and distribution function in copper ore grinding. Results indicated that stirrer speed significantly increased breakage rates, while an increase in percent solids decreased breakage rates.
Article
Materials Science, Multidisciplinary
Jinpeng Li, Huarui Zhang, Zhanxin Li, Ming Du, Jiulong Chen, Yesheng Xiong, Hu Zhang, Ying Cheng
Summary: This study investigates the wetting characteristics and flow behavior of sand particles bonded with silicate binder. It finds that coarse and circular particles demonstrate stronger wetting properties compared to fine and angled particles. The ring shear test can measure the cohesion and internal friction angle of the wet sand mixture, while the Mohr Coulomb model can calculate the unconfined yield strength and main consolidation stress to quantify the flowability. The particle size distribution is identified as the most important factor affecting the flowability of wet sand particles.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Pharmacology & Pharmacy
Gulenay Guner, Dogacan Yilmaz, Ecevit Bilgili
Summary: This study analyzed the effects of stirrer speed and bead material loading on fenofibrate particle breakage during wet stirred media milling using various kinetic and microhydrodynamic models. The nth-order model was the most suitable for describing the temporal evolution, showing almost second-order kinetics. Higher stirrer speed and/or loading with zirconia beads led to faster breakage. Additionally, a multiple linear regression model incorporating microhydrodynamic parameters provided the best explanation for the variation in breakage rate constant.
