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Journal articles on the topic 'Ball mills'

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Author: Grafiati

Published: 4 June 2021

Last updated: 29 January 2023

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1

Chica Osorio, Lina María, Ismael Eduardo Rivera, Marlon Rincón Fulla, Adriana Marcela Osorio, Moisés Oswaldo Bustamante, and Juan María Menendez Aguado. "Comparison of alumina ball size distribution in two white cement grinding units using Swebrec function." DYNA 86, no. 209 (April 1, 2019): 25–29. http://dx.doi.org/10.15446/dyna.v86n209.73970.

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The results of characterizing the alumina ball size distribution in two mills of a crushing and grinding plant are shown. The mills were unloaded and the ball charge was screened in order to establish the ball size distribution. For both mills, the balls retained during the unloading were compared to the balls retained at the beginning of the process, and additionally, they were compared to the results obtained by the Swebrec adjusted distribution model. In both cases, the experimental data have had a good fit with this model. This practice is important in order to establish the best ball charge at the beginning of the operation and the ball recharge in the steady state.

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2

Austin, L. G., and R. R. Klimpel. "Ball wear and ball size distributions in tumbling ball mills." Powder Technology 41, no. 3 (March 1985): 279–86. http://dx.doi.org/10.1016/0032-5910(85)80026-7.

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3

Haley, Rebecca A., James Mack, and Hairong Guan. "2-in-1: catalyst and reaction medium." Inorganic Chemistry Frontiers 4, no. 1 (2017): 52–55. http://dx.doi.org/10.1039/c6qi00400h.

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4

Campo, F., and Jairo A. Escobar Gutiérrez. "2D Model for Ball Mills." Materials Science Forum 530-531 (November 2006): 282–85. http://dx.doi.org/10.4028/www.scientific.net/msf.530-531.282.

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This work develops a mathematical model that explains the ball mills operational speed. The scope of the model is defined by the powder as the number of particles per cm3 and the Relevance defined as the ratio between different forces. In this study, the Relevance is defined as the ratio between superficial tension and inertial forces. The conditions for a free flowing powder and a single particle are differenced and non-dimensional numbers are found. The model proposed use the friction force between mill walls and the powder mass is related by a friction coefficient that can be calculated from angle repose. An experimental approach proves that the suppositions made in order to develop the model were adequate in this way the existence of the non-dimensional numbers is confirmed. It is also discussed the use of non-dimensional numbers to increase processing speeds with by increasing gravity clarifying that a given Relevancy, it is not dependent of the non-dimensional numbers. Thus, the model can help in the design process of ball mills with a deeper understanding of the phenomena.

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5

Vickers, G. W., and K. W. Quan. "Ball-Mills Versus End-Mills for Curved Surface Machining." Journal of Engineering for Industry 111, no. 1 (February 1, 1989): 22–26. http://dx.doi.org/10.1115/1.3188728.

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The use of end-mills for machining low curvature surfaces is examined in relation to the more popular ball-mills. End-mills are shown to give a better match to the required surface geometry and hence reduce the number of surface passes required. They also have a much better efficiency of material removal and longer tool life. It is shown that the use of end-mills for curved surface work can typically reduce the overall cutting time by a factor of twenty-four.

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6

Zhang, Xiaohui, Xitao Liu, Jianguo Zhao, Wenjun Sun, Yuanna Zhang, Jun Qiao, Guoqiang Xing, and Xiaoshu Wang. "Model Study of Mechanicochemical Degradation in a Planetary Ball Mill." Sustainability 15, no. 2 (January 11, 2023): 1353. http://dx.doi.org/10.3390/su15021353.

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The process of ball milling and the materials that compose planetary ball mills are highly complex, and the existing research on the change in ball-milling energy is not mature. The theoretical model of a ball mill was established for the first time to simulate the motion, collision process, energy transfer, and temperature change of small balls during the ball-milling process. Furthermore, by comparing the information with the experimental data for a ball mill, the motion trajectory of the grinding ball, and the energy transfer between the balls and materials were studied, and the micro process during milling was discussed. This study provides a certain theoretical basis for the follow-up engineering application.

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7

Ene, Gheorghe, and Iuliana-Marlena Prodea. "Calculus of the Required Driving Power for Tube Ball Mills." Revista de Chimie 59, no. 1 (February 9, 2008): 106–12. http://dx.doi.org/10.37358/rc.08.1.1717.

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This paper presents the determining of the necessary driving power for tube ball mills, regarding frequently used working conditions: by rolling balls and by falling down balls, on parabolic trajectory. To make easier the calculation of driving power, the established correlations where used in Blanc formula.

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8

Nkomo, Fortune, and Francois K. Mulenga. "Assessing the Effects of Material Properties on Load Behavior in Dry Ball Mills Using DEM." 2018 International Conference on Multidisciplinary Research 2022 (December 30, 2022): 253–64. http://dx.doi.org/10.26803/myres.2022.21.

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Understanding how the mill load behaves is crucial for enhancing ball mill effectiveness. This study aimed to create a discrete element method (DEM) model to simulate the motion charge in ball mills and to analyze how the simulation material properties affected the load behavior. The steel balls were modelled as a collection of distinct particles, each of which was subject to Newton’s laws of motion and tracked in a Lagrangian manner. Hertzian contact law was used to describe inter-particle collisions. Then, this numerical model was coded using the open-source C++ program LAMMPS Improved for General Granular and Granular Heat Transfer Simulation (LIGGGHTS) to mimic laboratory and pilot-scale ball mills. The load positions measured from the DEM simulations were compared to the published experimental data and empirical models of comparable laboratory and pilot-scale experiments to validate the findings. The angular shoulder position ranged between 137° to 154° for the range of Young’s modulus of 0.5 to 1000 MN/mm2. Angular shoulder and toe positions had a variation of less than 10% from the laboratory and pilot-scale experimental data. The outcomes demonstrated a significant relationship between load position and material characteristics such as Young's modulus in DEM simulation. This preliminary model can be used for choosing the appropriate material parameters for ball mills both with DEM and coupled CFD–DEM multiphase simulations. This assessment concluded that material properties affect the load behavior in computer simulations of ball mills.

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9

Zheng, Pu Yan, Du Wang, Xiu Ping Yao, and Yan Zhou Yuan. "The Study of Wear Matrix Model Test Improvement." Advanced Materials Research 753-755 (August 2013): 2214–18. http://dx.doi.org/10.4028/www.scientific.net/amr.753-755.2214.

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The ball mills, which have great energy consumption, are commonly used in coal-fired power plant. The key to reduce their energy consumption is to determine the best ball loading, the optimum gradation and the complement parameters. The premise of determining these parameters is to give the balls wear law. The wear matrix model, which determines the balls probability distribution through their diameters, is one of the practice methods to determine the balls attrition rule. This study assessed the wear law through the change of balls weight, determines the program feasibility and the test time through the test of a ball mill.

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10

Piekaj, Paweł. "Modern grinding balls sorting machines." New Trends in Production Engineering 2, no. 1 (October 1, 2019): 86–95. http://dx.doi.org/10.2478/ntpe-2019-0009.

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Abstract Raw materials produced in large quantities are ground in ball, vibratory and stirred ball mills. In mills, the working parts are grinding balls. During grinding, grinding balls wear, change their diameter and lose their shape. The effect of this is the unfavourable change in the grinding balls parameters, which results in deterioration of the technological conditions of the milling process. Relevant parameters of the grinding balls set are restored during maintenance shutdowns. Grinding balls are sorted into appropriate size classes; grinding balls that are not suitable for further use are rejected, and then a set of grinding balls with appropriate parameters is used again. The time needed to prepare the required set depends mainly on the sorting time. To reduce this time, appropriate grinding balls sorting machines are used. The paper presents major problems associated with the grinding balls sorting process, a comparison of modern types of grinding balls sorting machines, a description of their construction and technological parameters.

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11

Gao, R. X., and W. Thelen. "Sensor-Integrated Grinding Balls for on-Line Load Distribution Measurement in Ball Mills." Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture 208, no. 3 (August 1994): 183–90. http://dx.doi.org/10.1243/pime_proc_1994_208_077_02.

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For the on-line measurement of stress and energy distributions inside ball mills, two types of self-contained, autonomous grinding balls with fully integrated piezo-electric sensors and data-processing electronics are developed and fabricated. The basic model is designed for batchwise experiments on ball mills, where data registered in electronic memories are read out through cable connections to a processing circuit. The improved model contains additional data modulation circuits with a VHF microtransmitter, allowing on-line data retrieval. For the purpose of circuit miniaturization, hybrid and surface mount techniques (SMT) have been utilized. The instrumented balls are identical in size, mass and surface characteristics to the normal grinding balls, with the minimum outer diameter being 40 mm. Systematic experiments have shown that they are fully applicable in a realistic grinding environment where grinding media are presented. In addition to ball mill applications, the developed integration and measuring technique is generally suited for on-line data registration on free-moving objects or other industrial applications where accessibility of the measurand is insufficient.

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12

Burmeister, Christine Friederike, and Arno Kwade. "Process engineering with planetary ball mills." Chemical Society Reviews 42, no. 18 (2013): 7660. http://dx.doi.org/10.1039/c3cs35455e.

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13

Cleary, Paul W. "Axial transport in dry ball mills." Applied Mathematical Modelling 30, no. 11 (November 2006): 1343–55. http://dx.doi.org/10.1016/j.apm.2006.03.018.

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14

Ryabov, E. A., S. Yu Yurasov, and O. I. Yurasova. "Parametric modeling of ball end mills." Russian Engineering Research 36, no. 9 (September 2016): 784–85. http://dx.doi.org/10.3103/s1068798x16090197.

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15

Vermeulen, L. A. "A contribution to ‘ball wear and ball size distributions in tumbling ball mills’." Powder Technology 46, no. 2-3 (April 1986): 281–85. http://dx.doi.org/10.1016/0032-5910(86)80038-9.

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16

Si-Yong, Zhao, Lin Huai-Tao, Zeng Yao-Dong, Lu Jin-Cai, and Chang Zhe-Chuan. "The optimal mating of balls and lining plates in ball mills." Wear 178, no. 1-2 (November 1994): 79–84. http://dx.doi.org/10.1016/0043-1648(94)90131-7.

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17

Matsui, Anatolii, Vasyl Kondratets, and Anastasiia Abashina. "Energy efficiency optimization of ore grinding by ball mills in a closed cycle with a single-spiral classifier." Modeling, Control and Information Technologies, no. 4 (October 23, 2020): 96–99. http://dx.doi.org/10.31713/mcit.2020.19.

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Factors are identified whose role in increasing the productivity of ball mills is not fully disclosed. The criterion of optimality in the task of increasing the energy efficiency of ore grinding by ball mills and the influence of these factors on its value. Ways to improve the energy efficiency of ore grinding are proposed.

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18

Ryabov, E. A., V. A. Grechishnikov, R. M. Khisamutdinov, S. Yu Yurasov, and O. I. Yurasova. "Assessing the Life of Ball-End Mills." Russian Engineering Research 39, no. 3 (March 2019): 249–51. http://dx.doi.org/10.3103/s1068798x19030195.

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19

Li, Kun Shan, and Yang Li. "The Assembly Design of Non-Ball Mills." Advanced Materials Research 605-607 (December 2012): 65–68. http://dx.doi.org/10.4028/www.scientific.net/amr.605-607.65.

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The purposes of assembly design (DFA) are aimed to rapidly fit certain machine parts together with the final assemble quality guaranteed. This indicates certain measurements are taken in the very initiative stages to achieve the lowest assembly cost, include quantitative analysis of products; products design optimizations and compression of assembly time. To both aspects of products assemblage capabilities and cost reductions, the DFA usually acquires the least numbers of parts also ensures the ease manufacture and assemble of the parts.

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20

Eremenko, Yu I., D. A. Poleshchenko, Yu A. Tsygankov, and M. D. Borovinskikh. "IDENTIFICATION OF BALL MILLS BY OPERATION DATA." MINING INFORMATIONAL AND ANALYTICAL BULLETIN 1 (2018): 150–57. http://dx.doi.org/10.25018/0236-1493-2018-1-0-150-157.

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21

Nomura, Shinichiro. "Analysis of holdups in continuous ball mills." Powder Technology 235 (February 2013): 443–53. http://dx.doi.org/10.1016/j.powtec.2012.10.053.

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22

Fuerstenau, D. W., and A. Z. M. Abouzeid. "Scale up of lifters in ball mills." International Journal of Mineral Processing 15, no. 3 (October 1985): 183–92. http://dx.doi.org/10.1016/0301-7516(85)90034-1.

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23

Lo, Y. C., J. A. Herbst, K. Rajamani, and N. Arbiter. "Design considerations for large diameter ball mills." International Journal of Mineral Processing 22, no. 1-4 (April 1988): 75–93. http://dx.doi.org/10.1016/0301-7516(88)90057-9.

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24

Nailov, N. N. "Re-Lining of Large-Size Ball Mills." Mining Industry Journal (Gornay Promishlennost) 145, no. 3/2019 (July 16, 2019): 58–59. http://dx.doi.org/10.30686/1609-9192-2019-3-145-58-59.

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25

Theuerkauf, J., J. Schwedes, and H. J. Feise. "Two Phase Flow in Stirred Ball Mills." Particulate Science and Technology 15, no. 2 (April 1997): 125. http://dx.doi.org/10.1080/02726359708906733.

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26

Kung, L. S., and J. C. Samin. "Measurement of velocity fields in ball mills." Experimental Mechanics 36, no. 3 (September 1996): 251–57. http://dx.doi.org/10.1007/bf02318015.

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27

Bogdanov, V. S. "Optimization of the design of ball mills." Refractories 26, no. 5-6 (May 1985): 312–15. http://dx.doi.org/10.1007/bf01539598.

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28

Buchholtz, V., J. A. Freund, and T. Pöschel. "Molecular dynamics of comminution in ball mills." European Physical Journal B 16, no. 1 (June 2000): 169–82. http://dx.doi.org/10.1007/pl00011052.

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29

Sevost'yanov, V. S., A. A. Goncharov, and V. P. Potelezhko. "Improvement of the technology of ball mills." Glass and Ceramics 50, no. 2 (February 1993): 55–59. http://dx.doi.org/10.1007/bf00682491.

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30

Koda, Risa, Hiroshi Usuki, Masahiro Yoshinobu, Kana Morishita, Shuho Koseki, Kenichi Inoue, and Masahiro Hagino. "Effect of Work Material’s Hardness on Cutting Performance of TiAlN- and CrAlN-Coated Cutting Tools." Key Engineering Materials 656-657 (July 2015): 231–36. http://dx.doi.org/10.4028/www.scientific.net/kem.656-657.231.

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For better selection of coated cutting tools, TiAlN (Ti50Al50N) and CrAlN (Cr50Al50N) coatings were deposited onto ball-nose and square end mills using arc evaporation, and their cutting performances were evaluated using steel workpieces of various hardnesses. In particular, cutting tests were performed on three types of workpieces, made from S50C, SKD61, and SKD11 steels, having Brinell hardness numbers of HB220, HRC40, and HRC60, respectively. The results of the cutting experiments were elucidated and discussed in terms of the mechanical properties and anti-oxidation resistances of the different coatings. The results revealed that TiAlN-coated square end mills at high cutting speeds (V = 200 m/min ) had superior performance when used on steels with high hardness (SKD11), whereas CrAlN-coated ball-nose end mills were superior when used on low hardness steel (S50C). Therefore, CrAlN-coated ball-nose end mills are concluded to be suitable for the machining of low hardness steels, whereas TiAlN-coated square end mills are preferable for the machining of high hardness steels (SKD11).

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31

Bogdanov, V., S. Anciferov, D. Bogdanov, and E. Sychyov. "STATE AND DIRECTIONS OF DEVELOPMENT OF GRINDING TECHNIC AND TECHNOLOGY." Bulletin of Belgorod State Technological University named after. V. G. Shukhov 7, no. 7 (April 7, 2022): 110–16. http://dx.doi.org/10.34031/2071-7318-2022-7-7-110-116.

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The analysis of the state and direction of development of equipment and technology for grinding materials in the Russian and foreign cement industry is carried out. The equipment used for grinding with ball mills, vertical mills and press-roll grinders is considered. The effectiveness of the use of ball mills and their advantage over other grinding units used in large-capacity production is shown. One of the main directions for the development of the efficiency of the grinding process in ball drum mills has been determined. It consists in the development of intra-mill devices that are aimed at destroying stagnant zones in the feed, intensifying the work of grinding bodies and creating conditions within the mill classification of the crushed material. The design and principle of operation of a ball drum mill equipped with an inclined inter-chamber partition is described. It ensures the transverse-longitudinal movement of grinding bodies in the mill body. The advantages of using an inclined inter-chamber partition are given, which include a reduction in the weight of the mill load and the hydraulic resistance of partition, improved aspiration, reduced power consumption and provision of transverse-longitudinal movement.

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32

Lagos, Carolina, Raúl Carrasco, Guillermo Fuertes, Sabastián Gutiérrez, Ismael Soto, and Manuel Vargas. "Big Data on Decision Making in Energetic Management of Copper Mining." International Journal of Computers Communications & Control 12, no. 1 (December 2, 2016): 61. http://dx.doi.org/10.15837/ijccc.2017.1.2784.

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It is proposed an analysis of the related variables with the energetic consumption in the process of concentrate of copper; specifically ball mills and SAG. The methodology considers the analysis of great volumes of data, which allows to identify the variables of interest (tonnage, temperature and power) to reach to an improvement plan in the energetic efficiency. The correct processing of the great volumen of data, previous imputation to the null data, not informed and out of range, coming from the milling process of copper, a decision support systems integrated, it allows to obtain clear and on line information for the decision making. As results it is establish that exist correlation between the energetic consumption of the Ball and SAG Mills, regarding the East, West temperature and winding. Nevertheless, it is not observed correlation between the energetic consumption of the Ball Mills and the SAG Mills, regarding to the tonnages of feed of SAG Mill. In consequence, From the experimental design, a similarity of behavior between two groups of different mills was determined in lines process . In addition, it was determined that there is a difference in energy consumption between the mills of the same group. This approach modifies the method presented in [1].

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33

Kuppuswamy, Ramesh, and Kapui Mubita. "Electro-polishing of tungsten carbide ball nose end mill to improve tool life." Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering 231, no. 4 (December 16, 2015): 667–75. http://dx.doi.org/10.1177/0954408915622595.

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Electro-polishing was used as an alternative to mechanical polishing for the cutting edge preparation of tungsten carbide (WC) ball nose end mills. High-quality cutting edge surfaces with roughness of magnitude 0.3–0.35 µm was achieved using the electro-polishing process. A direct current of 0.96 A was passed through an electrolytic cell containing the electrolyte sodium hydroxide with a concentration—2.5 mol/dm3. The ball nose end mill was suspended as the anode and a stainless steel (SS304) as the cathode. The ball nose end mill was electro-polished using the optimized parameters which was obtained through performing the preliminary experiments on tungsten carbide coupons of size D6 × 20 mm. The effects of electro-polishing on the surface texture of the ball nose end mill were determined using surface texture examinations. Machining tests were conducted on Ti6Al4V alloy to understand the growth of flank wear on the electro-polished ball nose end mills. After every 5 m of cutting distance, flank wear measurements were done for both the regular ball nose end mill and the electro-polished ball nose end mills. The results revealed that the electro-polished ball nose end mill reached a flank wear of 0.15 mm after a cutting distance of 550 m. This was significantly more than the cutting distance of the standard ball nose end mill of magnitude 350 m for the same amount of flank wear. This showed an increase in tool life of over 50%.

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34

Rosenkranz, S., S. Breitung-Faes, and A. Kwade. "Experimental investigations and modelling of the ball motion in planetary ball mills." Powder Technology 212, no. 1 (September 2011): 224–30. http://dx.doi.org/10.1016/j.powtec.2011.05.021.

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35

Lei, X. L., Liang Wang, Bin Shen, Fang Hong Sun, Z. M. Zhang, and Ming Chen. "Fabrication and Application of Diamond Coated Micro Ball End Mills." Materials Science Forum 697-698 (September 2011): 462–65. http://dx.doi.org/10.4028/www.scientific.net/msf.697-698.462.

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Thin diamond films are deposited on commercial tungsten carbide micro ball end mill by using hot filament chemical vapour deposition (HFCVD) technique. Raman spectrum results confirm the high purity of sp3-carbon bond diamond of as-deposited films. The scanning electron microscope (SEM) investigation exhibits continuous fine grained diamond films are uniformly deposited on micro ball end mill. Milling of graphite is chosen to check the cutting performance of fabricated diamond coated micro ball end mill. For the sake of comparison, milling test is also carried out using uncoated micro ball end mill under the same cutting parameters. The milling test results show that the tool life of diamond coated micro ball end mill is about 10 times than that of uncoated one, which may attribute to high hardness, wear resistance, low sticking to graphite of deposited diamond films and strong adhesive strength between them and substrate surfaces.

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36

Kolev, Nikolay, Petar Bodurov, Vassil Genchev, Ben Simpson, Manuel G. Melero, and Juan M. Menéndez-Aguado. "A Comparative Study of Energy Efficiency in Tumbling Mills with the Use of Relo Grinding Media." Metals 11, no. 5 (April 29, 2021): 735. http://dx.doi.org/10.3390/met11050735.

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An evaluation of Relo grinding media (RGM, Reuleaux tetrahedron-shaped bodies) performance versus standard grinding media (balls) was made through a series of grinding tests, including a slight modification of the standard Bond test procedure. Standard Bond tests showed a reduction in the Bond ball mill work index (wi) of the mineral sample used in this study when using Relo grinding media. The modified Bond test procedure is based on using the standard Bond ball work index test but changing the circulating loads (350%, 250%, 150%, 100%). The comparative tests with RGM were carried out at the same number of revolutions as the grinding tests with balls at respective circulating load. The RGM charge yielded a 14% higher net undersize product than balls, which hints at improving energy efficiency and the potential for significant mining industry benefits.

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37

Ibrahim Habibov, Famil Hamidov, Ibrahim Habibov, Famil Hamidov. "INTEGRATION OF AUTOMATIC BALL ADJUSTING DEVICE INTO THE GRINDING PROCESS SYSTEM OF «AZERBAIJAN INTERNATIONAL MINING COMPANY." ETM - Equipment, Technologies, Materials 09, no. 01 (January 22, 2022): 04–09. http://dx.doi.org/10.36962/etm0901202204.

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While the technologies used in the manufacturing sector, as well as equipment and special technical means, are characterized by modernity, reliability and high productivity, they have undergone certain improvements and innovations from time to time. Meanwhile, the work done on the grinding process in SAG Mill mills installed at the AGL plant in the Kadabay contact area is of great importance. The article presents the results of the integration of the automatic ball adjusting device into the system of SAG mills used in the grinding process. Keywords: mining industry, grinding process, balls, wear, automatic loading, loading device.

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38

Rudovica, V., J. Tjutrins, A. Viksna, and G. Zarina. "Investigation of Optimized Homogenization by Ball Mills for Quantitative Chemical Analysis in Sandy Soils." Latvian Journal of Chemistry 50, no. 1-2 (January 1, 2011): 57–63. http://dx.doi.org/10.2478/v10161-011-0053-9.

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Investigation of Optimized Homogenization by Ball Mills for Quantitative Chemical Analysis in Sandy SoilsThe efficiency of homogenization was studied by examining particle size distribution and element quantification in the sandy soils using the ball mills. The following parameters were optimized - sample volume, oscillation frequency and grinding time. The homogenized soil fraction with ~ 85% of particles with sizes below 40 μm was established to give high precision and accuracy of quantitative analysis of the results.

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39

Zaujec, Rudolf, Peter Pokorný, František Jurina, Tomáš Vopát, and Vladimír Šimna. "Influence of Finish Milling Strategies on the Tool Wear." Research Papers Faculty of Materials Science and Technology Slovak University of Technology 26, no. 42 (June 1, 2018): 197–206. http://dx.doi.org/10.2478/rput-2018-0024.

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Abstract The article deals with the tool life of ball nose end mills during finish milling of weld deposit. The aim was to determine and compare the wear of ball nose end mill for different types of ball end milling strategies, as well as to specify particular steps of the measurement process. For tool life test, DMG DMU 85 monoBLOCK 5-axis CNC milling machine was used. In the experiment, the cutting speeds, feed rates, axial and radial depth of cut were constant. The coated cemented carbide was used as tool material. The cutting tool wear was measured on Zoller Genius 3s and laser Blum Micro Compact NT. The results show different achieved tool life of ball nose end mills depending on the finish milling strategy.

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40

Shi, Fengnian, Rob Morrison, Andrew Cervellin, Fraser Burns, and Fiesal Musa. "Comparison of energy efficiency between ball mills and stirred mills in coarse grinding." Minerals Engineering 22, no. 7-8 (June 2009): 673–80. http://dx.doi.org/10.1016/j.mineng.2008.12.002.

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41

Afuni, Ahmad. "Heat ball formulæ for k-forms on evolving manifolds." Advances in Calculus of Variations 12, no. 2 (April 1, 2019): 135–56. http://dx.doi.org/10.1515/acv-2017-0026.

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AbstractWe establish a local monotonicity identity for vector bundle-valued differential k-forms on superlevel sets of appropriate heat kernel-like functions. As a consequence, we obtain new local monotonicity formulæ for the harmonic map and Yang–Mills heat flows on evolving manifolds. We also show how these methods yield local monotonicity formulæ for the Yang–Mills–Higgs flow.

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42

Peretyat’ko, V. N., A. S. Klimov, and M. V. Filippova. "Roller grooving in ball-rolling mills. Part 1." Steel in Translation 43, no. 4 (April 2013): 168–70. http://dx.doi.org/10.3103/s0967091213040128.

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43

Monov, Vladimir, Blagoy Sokolov, and Stefan Stoenchev. "Grinding in Ball Mills: Modeling and Process Control." Cybernetics and Information Technologies 12, no. 2 (June 1, 2012): 51–68. http://dx.doi.org/10.2478/cait-2012-0012.

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Abstract The paper presents an overview of the current methodology and practice in modeling and control of the grinding process in industrial ball mills. Basic kinetic and energy models of the grinding process are described and the most commonly used control strategies are analyzed and discussed.

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Kwon, Young-Soon, Konstantin B. Gerasimov, and Sok-Keel Yoon. "Ball temperatures during mechanical alloying in planetary mills." Journal of Alloys and Compounds 346, no. 1-2 (November 2002): 276–81. http://dx.doi.org/10.1016/s0925-8388(02)00512-1.

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Bwalya, M. M., M. H. Moys, G. J. Finnie, and F. K. Mulenga. "Exploring ball size distribution in coal grinding mills." Powder Technology 257 (May 2014): 68–73. http://dx.doi.org/10.1016/j.powtec.2014.02.044.

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Schwedes, J., and F. Bunge. "Comminution and transport behaviour in agitated ball mills." Advanced Powder Technology 3, no. 1 (1992): 55–70. http://dx.doi.org/10.1016/s0921-8831(08)60689-5.

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Tavares, Luís Marcelo, and Raquel D. C. Kallemback. "Grindability of binary ore blends in ball mills." Minerals Engineering 41 (February 2013): 115–20. http://dx.doi.org/10.1016/j.mineng.2012.11.001.

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Shi, Fengnian. "An overfilling indicator for wet overflow ball mills." Minerals Engineering 95 (September 2016): 146–54. http://dx.doi.org/10.1016/j.mineng.2016.06.027.

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Weedon, D. M. "A perfect mixing matrix model for ball mills." Minerals Engineering 14, no. 10 (October 2001): 1225–36. http://dx.doi.org/10.1016/s0892-6875(01)00139-x.

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Austin, L. G., W. Hilton, and B. Hall. "Mill power for conical (Hardinge) type ball mills." Minerals Engineering 5, no. 2 (January 1992): 183–92. http://dx.doi.org/10.1016/0892-6875(92)90041-7.

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