Author
Seongsoo Kim
Bio: Seongsoo Kim is an academic researcher from Gyeongsang National University. The author has contributed to research in topics: Grinding & Ball mill. The author has an hindex of 6, co-authored 13 publications receiving 130 citations.
Topics: Grinding, Ball mill, Discrete element method, Ball (bearing), Particle
Papers
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TL;DR: In this article, an experimental investigation was carried out on the ultra-fine grinding of inorganic powders using a stirred ball mill and the power consumed in the grinding process was measured, and the comminution coefficient was examined, based on an analysis of the relationship between the experimental specific surface area and the particle size distribution of ground products.
61 citations
TL;DR: In this article, the particle size distribution of poly component particulate systems studied in three kinds of experimental methods is reported. But the results do not show reasonably good agreement between the different analyzers and different sample systems.
Abstract: We report the particle size distribution of poly component particulate systems studied in three kinds of experimental methods. Six analyzers, such as Mastersizer Microplus (Malvern Instruments Ltd., UK), LS230 (Coulter Electronics Ltd., USA) LMS30 (Seishin, Japan), Analysette22 (Fritsch, Germany), HELOS (Sympatec, Germany) based on a laser diffraction and scattering method, and the SKC-2000S (Seishin Co., Ltd., Japan) based on the centrifugal sedimentation method, were used to study the particle size distribution. The results do not show reasonably good agreement between the different analyzers and different sample systems. There is a discrepancy regarding the absolute values, which can be explained by the fact the techniques used are based on different measuring principles. The results of the present study reflect that the investigator must carefully select the particle size analyzer for a particular application. Therefore, we suggest that it is necessary to measure the particle size distribution by using at least two types of analyzers or more of different makers.
14 citations
TL;DR: In this paper, a simulation of the three-dimensional motion of grinding media in the stirred media mill for the research of grinding mechanism has been carried out by 3-dimensional discrete element method (DEM), the movement of ball assemblies was graphically displayed with some snapshots from start of the milling to 0.20 s.
Abstract: A simulation of the three-dimensional motion of grinding media in the stirred media mill for the research of grinding mechanism has been carried out by 3-dimensional discrete element method (DEM). The movement of ball assemblies was graphically displayed with some snapshots from start of the milling to 0.20 s. From these simulation results, the grinding zone in the mill was confirmed to be distributed into two regions, which is near the stirrer and the side wall of mill around the stirrer. The power changing the rotation speed of stirrer was examined based on the micro interactive forces at all the contact points between ball-to-ball and between ball-to-stirrer. DEM is a very powerful tool for the microanalysis of movement of balls, which could not have been solved by a conventional experimental method.
14 citations
TL;DR: In this article, an empirical method to determine the optimum refractive index (RI) of a poly-component particulate system was proposed, which is the ratio of the velocity of light (of specified wavelength) in air, to its velocity in the substance under examination.
9 citations
TL;DR: In this article, the authors investigated the effect of sample concentration on the ultra fine grinding rate of calcite powder in a stirred ball mill with respect to slurry concentration and found that the lower the sample concentration, the better the grinding rate.
Abstract: Wet ultra fine grinding of a calcite powder has been investigated in a stirred ball mill with respect to the effect of slurry concentration. The grinding rate on the submicrometer range was measured and the grinding constant on the grinding rate (K) in the grinding kinetics equation was examined. It is observed that the grinding rate for calcite in the submicrometer size range is different for different sample concentrations. It was found that the lower the sample concentration, the better the grinding rate. Furthermore, an empirical grinding rate (K)-sample concentration model provides a good fit to the grinding results under the experimental conditions investigated. The K improved by a maximum of 1.6 times at 700 rpm and 19.1 times 300 rpm for various sample concentrations, respectively. We confirmed that sample concentration affected the grinding rate of the submicrometer-size powder during the grinding process.
8 citations
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01 Jan 2011
TL;DR: In this paper, the authors proposed to use wind and wave energy for reverse osmosis and electrodialysis for seawater desalination in order to protect the marine environment.
Abstract: Seawater Desalination for Freshwater Production.- Conventional Thermal Processes.- Membranes for Desalination.- Commercial Desalination Technologies.- Nuclear Desalination.- Solar Thermal Processes.- Membrane Distillation for Solar Desalination.- Photovoltaic Reverse Osmosis and Electrodialysis.- Wind and Wave Energy for Reverse Osmosis.- Operating RE/Desalination Units.- Protecting the Marine Environment.
127 citations
TL;DR: In this paper, the micro-and nanostructure of the composites have been analyzed by X-ray diffraction, scanning electron microscopy and high-resolution transmission-empowered microscopy as affected by the type of CaL conditions employed.
122 citations
TL;DR: In this article, the influence of grinding conditions on the production of fine particles and the width of the particle size distribution produced during ball mill grinding was investigated, and the grinding experiments were carried out varying the grinding ball diameter under dry and wet conditions.
115 citations
TL;DR: In this article, the effect of particle size of nanoparticles has a reversed impact on the value of thermal conductivity and the temperature of the suspension has the direct influence on each other.
Abstract: In this paper, the last experimental results of the thermal conductivity of nanofluids have been investigated; therefore, because of the enormous numbers or some repetitions of such studies, it just tried to focus on those which had more acceptable results; however, it is not intended to present a systematic summary of the available references from the literature. All kinds of nanoparticles such as Al2O3, Fe3O4, TiO2, and CuO and their base fluids such as water, engine oil, glycol, and ethylene glycol have been investigated. The results showed that the effect of particle size of nanoparticle has a reversed impact on the value of thermal conductivity. To clarify, the thermal conductivity could increase by reduction in size of nanoparticles. On the other hand, the lower the suspension volume fraction is, the higher the thermal conductivity will be in nonlinear relation. Also the thermal conductivity and the temperature of the suspension have the direct influence on each other. In addition to the fact that a review paper has been prepared, the belief is to start this research with the scientific classification in order of all terms and expressions which have been used by previous scholars.
94 citations
01 Jun 2014
TL;DR: In this paper, the authors discuss the role of technology in infrastructure protection/energy and power, water and waste management, environmental issues and disasters, and climate change in infrastructure management.
Abstract: Technology; Infrastructure protection/Energy and power; Infrastructure protection/Water and waste management; Environmental issues and disasters; Environmental issues and disasters/Climate change
80 citations