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    Effect of Combined Mechanical and Ultrasonic Milling on the Size Reduction of Talc
    (Springer Heidelberg, 2020) Katircioglu-Bayel, Diler
    This study aims to investigate the effect of combined mechanical and ultrasonic milling on the size reduction of talc. Firstly, the talc sample was wet ground in a stirred media mill for five different times (30, 60, 90, 120, and 150 min), and the optimum result was subsequently achieved with treatment by ultrasonication. The effects of amplitude (20, 35, and 50 mu m), solid content (2.5, 5, 7.5, and 10%), and sonication time (60, 120, and 240 min) on the sizes of the final product were investigated. The pre-milling by wet grinding caused a decrease in the grinding resistance of talc. Sequential ultrasonic treatment, which was applied to the talc sample, generated smaller particles in comparison to those acquired by stirred media milling alone. Experimental results were assessed based on the product particle size (d(10), d(50)), reduction ratio, and specific energy consumption. Submicron particles prepared by ultrasonic treatment were perfectly stable compared to stirred media milling alone as investigated in terms of particle size. In addition, the effects of mechanical and ultrasonic milling on structural properties of talc particles were characterized by XRD analysis.
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    Effect of Operating Parameters on the Breakage Process of Calcite in a Stirred Media Mill
    (Springer Heidelberg, 2019) Katircioglu-Bayel, Diler; Ozkan, Safak Gokhan; Toraman, Oner Yusuf
    One of the most energy-intensive processes for producing submicron range calcite is stirred media mill. In the present work, numerous operating parameters such as solid mass fraction, grinding media size, media filling ratio, and grinding time have been investigated using a vertical type stirred media mill. The results are evaluated on the basis of mean particle size, specific surface area, and specific energy consumption. After conducting this study, optimum experimental conditions found to be as 70% media filling ratio, 25% solid mass fraction, 1 mm grinding media size, and 120 min grinding time. Besides, energy savings up to 22% were achieved with the choice of proper media size.
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    Effective role of grinding aids in the dry grinding performance of calcite
    (Elsevier, 2023) Katircioglu-Bayel, Diler
    Grinding aids are organic compounds that chemically attach to a sufficient amount of particle surfaces and prevent the formation of gravitational forces between particles. With the use of grinding aids in grinding, it is possible to increase the amount of production with the wanted product fineness and obtain a finer product with the identical amount of production. The usage of grinding aids prevents particle pelleting and leads to reduced energy consumption. The work aims to research the impacts of three pure grinding aids from different chemical classes on the dry grinding of calcite by the change in grinding time in a vertical stirred media mill. Concerning the results, this study has different aspects than many other studies. In the current study, the results were assessed with different findings: product particle size (d50), media coating, and energy consumption. Addition-ally, powder flowability and surface area were evaluated by different methods. The findings obtained from the experiments demonstrate that all grinding aids in small quantities remarkably had a positive effect on grinding performance of the ground products in comparison to grinding without additives. Moreover, a strong impact of certain grinding aids on the each findings were combined around summary a target diagram.
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    Impact of Operating Parameters on the Breakage Process of Talc
    (Springer Heidelberg, 2020) Katircioglu-Bayel, Diler
    This manuscript aimed to examine the impact of operating parameters on the wet grinding of talc in a vertical-type stirred media mill. Within the scope of the research, the effects of operating parameters including media filling ratio, solid mass fraction, grinding media size, and grinding time were studied. The findings were assessed based on the product particle size (d(50,)d(10)), surface area (S-w), and energy consumption (E-m). As a result of the present research, the following optimum grinding test conditions were determined: 65% media filling ratio, 40% solid mass fraction, 1 mm grinding media size, and 120 min grinding time. After determining the optimum grinding conditions, the Box-Behnken statistical design was used to determine the effect of parameter interactions on thed(50)size. The media filling ratio was found to significantly affect the decrease ind(50)compared to the other two parameters. Furthermore, the minimumd(50)size was also achieved under optimum grinding conditions.
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    Investigation of the use of glycerin as a by-product, pomace oil and paper wastewater as grinding aids in marble dust wastes
    (Elsevier, 2024) Katircioglu-Bayel, Diler
    Waste management in marble processing plants is a considerable problem in countries with developed stone industries and trade. Research on the utilization of stone waste in different fields is still continuing. However, there are few studies on using this stone waste from processing plants as mineral fillers. Moreover, no study in the literature has investigated the influence of grinding aids on stone properties. The current research is the first to compare of the efficiency of different grinding aids on the waste calcitic and dolomitic marble in the production of mineral fillers. The objective of this work is to research the impacts of waste and by-products on the dry grinding of stone wastes as grinding aids in a vertical stirred media mill. The results were assessed in terms of various parameters: product particle size, powder flowability, material coating on the grinding media, and energy consumption. Remarkably, the study showed that the use of any of the grinding aids tested enhanced the grinding process in comparison with the no -aid condition. The best product fineness value was achieved with pomace oil followed by the byproduct glycerin, among the grinding aids tested in both samples. Moreover, a higher media coating reduction and the highest energy saving were achieved with pomace oil. The most significant and lowest increase in the fluidity index was achieved with pomace oil and paper wastewater, respectively. Additionally, the Fourier transform infrared spectroscopy (FTIR) performed to reveal the interaction between particle surfaces and grinding aids demonstrated the activity of pomace oil and glycerin polar functional groups on particle surfaces. The analysis of the agglomeration phenomenon with SEM (scanning electron microscopy) micrographs showed that particle agglomeration could be eliminated with the pomace oil. Thermogravimetric analysis (TGA) was used to investigate changes in the mass of the samples' due to temperature changes. With this study, a significant contribution will be made to the ecosystem using waste marble powder whose storage problematic. (c) 2024 The Society of Powder Technology Japan. Published by Elsevier B.V. and The Society of Powder Technology Japan. All rights reserved.
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    The efficiency of grinding aids in the production of a bio-filling material in a stirred media mill
    (Elsevier Sci Ltd, 2023) Katircioglu-Bayel, Diler; Toghan, Esmatullah Wahib
    In recent years, the importance of recycling in reducing environmental pollution and protecting natural resources has increased daily. Eggshells are among the agro-based wastes from food processing in industries and households, causing adverse environmental impacts on our environment. In the dry grinding experiments conducted in the study, the effects of five dosages of ten grinding aids from five groups on the product were investigated, and it was planned to reduce the adverse impacts of waste on the environment by using it efficiently. Furthermore, the combinations of chemicals yielding the best results in each group in terms of particle size were also tested under the same conditions. The present research investigated the influence of grinding aid type and amount in various groups on product size (d10, d50, and d80), energy consumption (kWh/t), and grinding media coating (g/m2). The current research is promising in preventing the depletion of natural resources and transforming waste into valuable and usable products. Moreover, the utilized grinding aids considerably enhanced the grinding performance. In all experiments with grinding aids, better results concerning product size, energy consumption, and grinding media coating with the product were achieved in comparison with the tests without grinding aids.