Relevant bibliographies by topics / Coal crushing

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers

Academic literature on the topic 'Coal crushing'

Author: Grafiati
Published: 4 June 2021
Last updated: 15 February 2022

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Journal articles on the topic "Coal crushing"

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Xu, Dengke, Chaomin Mu, Wenqing Zhang, and Zhongqing Li. "Research on Energy Dissipation Laws of Coal Crushing under the Impact Loads." Shock and Vibration 2021 (June 18, 2021): 1–13. http://dx.doi.org/10.1155/2021/5563196.

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Dynamic crushing characteristics of coals are closely related with energy absorption and release of coals under certain strain rate. Hence, it is necessary to investigate energy dissipation laws of coal crushing under the impact loads with different strain rates. Based on the dynamic and static mechanical tests, crushing energy, total absorption energy, total releasable elastic latent energy, and relations between fractal feature of fragments, mean particle diameter and energy during crushing behaviors of outburst coal and nonoutburst coal were investigated. According to research results, crushing energy, total absorption energy, and releasable elastic latent energy of outburst coal and nonoutburst coal are related with strain rate, and they present exponential growths with the increase of the strain rate. However, the energy dissipation rate (ratio of crushing energy and incident energy) was basically constant at about 10%∼20%, that is, energy dissipation rate is a variable unrelated with strain rate. There is a good logarithmic relationship between the dynamic compressive strength of coals and the absorption energy density and elastic latent energy density, and dynamic comprehensive strength of coals has important impacts on energy absorption. The fractal features of coal fragments were obvious under dynamic impacts. The higher fractal dimension of fragment and the smaller mean particle diameter of experimental fragments bring the greater energy needed.
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Dubrovsky, V. A., Y. V. Isakov, and I. I. Potapov. "Water-Coal Suspension Preparation Using Electrohydraulic Coal Breakage Method." Materials Science Forum 870 (September 2016): 657–60. http://dx.doi.org/10.4028/www.scientific.net/msf.870.657.

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This paper presents the results of an investigation into obtaining water-coal suspension from brown coals of Kansk-Achinsk basin using the electrohydraulic method. The obtained results are the basis for developing the technology of obtaining water-coal suspension using electrohydraulic crushing.
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Miroshnichenko, D. V. "Crushing properties of coal." Coke and Chemistry 56, no. 12 (December 2013): 449–55. http://dx.doi.org/10.3103/s1068364x13120090.

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Yang, Daolong, Yanxiang Wang, Bangsheng Xing, Yanting Yu, Yuntao Wang, and Youtao Xia. "Recent Patents on Roll Crushing Mills for Selective Crushing of Coal and Gangue." Recent Patents on Mechanical Engineering 13, no. 1 (February 12, 2020): 2–12. http://dx.doi.org/10.2174/2212797613666200109112255.

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Background: Gangue is the concomitant product of coal mining. The traditional approach for gangue treatment is to transport it from underground to ground level to accumulate and form gangue hills. Objective: On the basis of summarizing previous research results, this paper introduces the hydraulic roller crusher and the electric machine built-in coal gangue roller crusher, which avoids the complex transmission problems caused by the movement of the central axis when the roller crusher is allowed to roll. Methods: The hydraulic counter-roll crusher directly separates large pieces of coal and underground gangue such that large pieces of coal gangue do not escape from the well. The electric machine built-in roller crusher is an explosion-proof electric machine used in the crushing roller. Results: Both of these crushers can be used in the selective crushing technology of coal gangue in a coal mine and can meet the requirements of crushing different material sizes and generally avoid the centre of the roller crusher. Conclusion: Both of these crushers reduce transportation costs, minimise land occupation, prevent surface subsidence, decrease environmental treatment costs, reduce environmental pollution, and decrease the transport volume of gangue underground. Various patents have been discussed in this article.
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Zhang, Li Song, Xiang Zhen Yan, and Xiu Juan Yang. "Classification Prediction Method Used in Coal Crushing." Advanced Materials Research 1044-1045 (October 2014): 268–71. http://dx.doi.org/10.4028/www.scientific.net/amr.1044-1045.268.

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Coal principal stresses with reservoir plane is analyzed, consequently coal seam crushed classification method is presented based on Hoek-Brown criterion. According to the coefficient of coal crushing, coal seam crushed coefficient size, four grades of A,B,C,D are divided for coal crushed degree along wellbore direction, and coal crushed classification standard is determined. Using the classification method and standard, the distribution regularity of coal crushing is studied for ZP-05 Well in QinShui basin. The research results show that coal crushing of ZP-05 is considered as grade B. The prediction results agree well with the measured values.
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Miroshnichenko, D. V., V. V. Koval, S. V. Fatenko, and Y. V. Nikolaichuk. "Crushing Properties of Coal 2. Binary Coal Blends." Coke and Chemistry 63, no. 11 (November 2020): 513–18. http://dx.doi.org/10.3103/s1068364x20110046.

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Wang, Yang, Hong Wei Yan, Hui Shan Lu, and Qiang Gao. "Research of Crushing Mechanism Based on Pulverized Coal Sample Preparation System." Advanced Materials Research 634-638 (January 2013): 1618–21. http://dx.doi.org/10.4028/www.scientific.net/amr.634-638.1618.

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Coal is the main material for human’s production and livelihood, and human pay more attention to it. Nowadays, Chinese crushing equipment’s volume is bigger, in view of this phenomenon, the author put forward to design a pulverized coal intelligent sample preparation device. This design not only has small size, but also has coarse crushing, drying, screening, grinding, grading and pulverized coal’s intelligent detection. It can well detect pulverized coal’s composition and year. In this paper, the author research on this mechanism’s coarse crushing device. Firstly, the author analyze the composition of coal to make a better foundation for crushing, then introduce the overall process of coarse crushing, and research the various parts of working principle and related parameters.
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Zheng, Wen Xiang, Ming Sun, and Wan Dong Han. "Experimental Research on Critical Force of Crushing and Sorting Coal Mine Gangue." Applied Mechanics and Materials 329 (June 2013): 26–30. http://dx.doi.org/10.4028/www.scientific.net/amm.329.26.

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First, The pressure test on two actual coal mine irregular and different particle sizes of coal and gangue, through the experimental data, using MATLAB software to give a graphic simulation and assumptions test of normal distribution, by the graphics and hypothetical test confirmed that coal and gangue had obvious demarcation, namely the critical force of crushing and storing coal gangue. In a coal mine as an example,and acquisiting more irregular and different particle sizes of coal and gangue were broken by static experiments and dynamic crushing experiment, using the experimental data obtained pressure distribution and pressure distribution curve equation,by equation to solve the crushing critical force FL of the size of 50-90mm coal and gangue,through mathematical and graphical analysis proved the rationality of FL,and providing a basic data for the future work.
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KINOSHITA, Masaaki, Yoshiki YAMAGUCHI, and Hirohisa YOSHIDA. "Crushing of coal by bowl mill." Journal of the Fuel Society of Japan 69, no. 9 (1990): 787–90. http://dx.doi.org/10.3775/jie.69.9_787.

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ORGANISCAK, JOHN A., and STEVEN J. PAGE. "Airborne Dust Liberation During Coal Crushing." Coal Preparation 21, no. 5-6 (December 2000): 423–53. http://dx.doi.org/10.1080/07349340108945630.

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Dissertations / Theses on the topic "Coal crushing"

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Flores, Ismael Vemdrame. "Avaliação da influência do tamanho de partícula sobre as propriedades de carvões coqueificáveis e de coques produzidos em escala de laboratório." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2014. http://hdl.handle.net/10183/114440.

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Atualmente a decrescente disponibilidade de carvões de excelente qualidade e seus preços elevados levam as coquerias a utilizarem carvões mais baratos e consequentemente com propriedades inferiores. Ao mesmo tempo, ocorre à necessidade de se manter as elevadas especificações de qualidade exigidas para o coque pelos altos-fornos. Nesse contexto, independente da escolha dos carvões a serem utilizados, o controle granulométrico dos carvões e misturas, realizado durante a britagem, pode manter ou até melhorar a qualidade do coque a ser produzido. O presente estudo teve como objetivo geral avaliar de que forma as propriedades dos carvões variam em relação a suas principais frações granulométricas após a cominuição, e estudar qual o efeito de diferentes distribuições de tamanhos de partículas sobre as propriedades de coques produzidos em escala de laboratório. Para isso, dois carvões coqueificáveis individuais e uma mistura foram amostrados, separados em frações granulométricas e caracterizados. Após a caracterização das matérias-primas, foram confeccionados coques em escala de laboratório, a partir de diferentes misturas de granulometrias para os carvões individuais amostrados. A caracterização dos coques foi realizada segundo análise imediata, textura, reatividade ao CO2 em termobalança, resistência a frio em tambor tipo I e microresistência. Os resultados obtidos da caracterização das matérias-primas mostraram que a cominuição dos carvões leva a concentrações de cinzas, matéria volátil e composição maceral em diferentes frações granulométricas produzindo alterações nas propriedades coqueificantes das frações granulométricas. O resultado da caracterização dos coques mostrou que cada carvão apresenta uma distribuição de tamanhos de partículas mais adequada, que irá gerar um coque de boa qualidade. Em termos de reatividade ao CO2, uma grande quantidade de partículas finas nas misturas levou a um aumento da reatividade dos coques produzidos. Além disso, a resistência mecânica foi mínima para as misturas grosseiras, enquanto uma mistura mais fina tendeu a produzir coques de resistência mecânica superior.
Nowadays, the decreasing availability of excellent quality coals and their high prices lead cokemakers to use cheaper coals, consequently with inferior properties. At the same time, there is the need to maintain the high coke quality specifications required for the blast furnace. In this context, independent of the choice of coal to be used, the particle size control of coals and blends, created during crushing, can maintain or even improve the quality of coke to be produced. The present study had as main objective to assess how the properties of coals vary in relation to its particle size fractions after crushing, and study what effect different particle size distributions can cause on the properties of coke produced in laboratory scale. Thus, two individual coking coals and a blend were sampled, separated into particle size fractions and characterized. After the characterization of raw materials, cokes were made on a laboratory scale, from blends of different particle sizes for an individual coals. The characterizations of cokes were done by proximate analysis, texture, thermobalance CO2 reactivity, cold strength in a CSR drum, and microstrength. The results of the characterization of raw materials showed that the comminution of coal leads to concentrations of ash, volatile matter and macerals on different size fractions, causing changes in coking properties of size fractions. The results of the characterization of the cokes showed that each coal used has a more suitable particle size distribution which will generate a good quality coke. In terms of CO2 reactivity, a large amount of small particles in the blend led to an increase of coke reactivity. Furthermore, the mechanical strength of cokes was sharply affected by coarse particle, while a blend with high fine proportion produced a coke with high mechanical strength.
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Ševčík, Vlastimil. "Pevnostní výpočet mlýnu pro drcení uhlí." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2014. http://www.nusl.cz/ntk/nusl-231309.

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This master's thesis deals with construction concept, execution and final evaluation of the stress-strain analysis of the main parts of the coal crushing fan mill. The main thesis part describes the general issue and different types of coal crushing fan mill. Construction part of the thesis is focused on optimal design evaluation and strength analysis of spiral body case as well as fan mill beater wheel.
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Books on the topic "Coal crushing"

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Press, Real Journal. I Never Dreamed I Would Be a Super Cool COMPUTER PROGRAMMER but Here I Am Crushing It: Lined Notebook Journal. Independently Published, 2020.

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Notebooks, Jay Office. I Never Asked to Be the World's Best Boss but Here I Am Absolutely Crushing It: Funny Lined Notebook, Office Gag Gift for Coworker, Sarcastic Joke Journal, Cool Humor Birthday Stuff, Diary, Perfect Appreciation Gift. Independently Published, 2020.

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Book chapters on the topic "Coal crushing"

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Ermakov, A. Y., and V. V. Senkus. "MECHANIZED CRUSHING & SCREENING PLANT." In XVIII International Coal Preparation Congress, 887–89. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-40943-6_137.

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Silyutin, Sergey, and Vladimir Artemiev. "Technology of Electromagnetic Dynamic Crushing and Milling." In XVIII International Coal Preparation Congress, 891–94. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-40943-6_138.

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Kirma, Turgut, Ekrem Selçuk, Ali Kalkanli, and Arda Çetin. "Production of Coal Crushing Hammer Heads by Bi-metal Casting." In Friction, Wear and Wear Protection, 81–92. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2011. http://dx.doi.org/10.1002/9783527628513.ch9.

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Zhao, Li-hua, and Ming Liu. "Operation and Maintenance of Coal Conveying System Screening and Crushing Coal Machinery in Thermal Power Plant." In International Asia Conference on Industrial Engineering and Management Innovation (IEMI2012) Proceedings, 731–40. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-38445-5_75.

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"Chapter 9 Crushing." In Minerals and Coal Process Calculations, 105–26. P.O. Box 11320, 2301 EH Leiden,The Netherlands, e-mail: Pub.NL@taylorandfrancis.com, www.crcpress.com – www.taylorandfrancis.com: CRC Press/Balkema, 2016. http://dx.doi.org/10.1201/9781315225524-10.

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"Failure of Coal Crushing Plant Taper Bearing." In ASM Failure Analysis Case Histories: Failure Modes and Mechanisms. ASM International, 2019. http://dx.doi.org/10.31399/asm.fach.modes.c9001741.

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Farne, Hugo, Edward Norris-Cervetto, and James Warbrick-Smith. "Chest pain." In Oxford Cases in Medicine and Surgery. Oxford University Press, 2015. http://dx.doi.org/10.1093/oso/9780198716228.003.0015.

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A good way to come up with a list of causes is to visualize the anatomy of the affected area and think of what could go wrong. Thus, in chest pain, there may be pathology of the heart, aorta, lungs, pulmonary vessels, oesophagus, stomach, thoracic nerves, thoracic muscles, or ribs. The main causes of acute chest pain in an individual aged over 60 include are listed in Figure 9.1. A younger patient is less likely to be suffering from diseases of old age, such as: • Acute coronary syndrome • Stable angina • Myopericarditis (usually post-infarction) • Thoracic aortic dissection • Thoracic aortic aneurysm A younger female patient on the combined oral contraceptive pill is more likely to be suffering from: • PE (the combined oral contraceptive pill is thrombogenic) • Pneumothorax (especially if tall and thin) • Cocaine-induced coronary spasm (still rare, but particularly unusual in older people). The following diagnoses require immediate management and should be kept in mind: • Acute coronary syndrome (unstable angina, or myocardial infarction (MI)) • Aortic dissection • Pneumothorax • PE • Boerhaave’s perforation The key features of each are listed below. 1 Features of acute coronary syndrome ■ History of sudden-onset, central, crushing chest pain radiating to either/both arms, neck or jaw, usually lasting a few minutes to half an hour (longer if there is ongoing infarction). Have a higher index of suspicion in those with a previous history of angina on exertion or MI and/or cardiovascular risk factors (smoking, hypertension, hypercholesterolaemia, diabetes mellitus, family history). ■ Signs of hypercholesterolaemia: cholesterol deposits in small skin lumps on the back of the hand or bony prominences like elbows (xanthomata), in creamy spots around the eyelids (xanthelasma), or a creamy ring around the cornea (arcus). Note that arcus is a normal finding in older people. ■ Signs of peripheral (atherosclerotic) vascular disease: weak pulses, peripheral cyanosis, cool peripheries, atrophic skin, ulcers, bruits on auscultation of carotids. ■ Signs of brady- or tachyarrhythmia. An arrhythmia is relevant for two reasons.
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Conference papers on the topic "Coal crushing"

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Seo, Hyeongjun, Sunil Kwon, and Seungrok Lee. "Development and Verification of Measurement Equipment for Residual Gas Content of a Coal Sample." In ASME 2016 35th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/omae2016-54154.

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This paper presents the development of measurement equipment for residual gas content consisting of a cylindrical canister, a grooved rod, and a crusher, as well as a test for verifying its efficiency and crushing ratio. The equipment was designed by considering factors such as crushing mode, material type and size, sealing, empty volume inside the canister, and portability to site. Particularly by designing a rod having grooves, unlike existing rod mills, the initial crushing time was shortened. Test results showed that an average of 83 min was consumed to achieve a 96% crushing ratio, which proved the developed equipment had excellent performance for use at coalbed methane sites.
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Liu, Yu, Jia-Wei Zhou, and Chen-Xu Luo. "Experimental study on impact crushing separation for gangue from raw coal underground." In The 2015 International Conference on Mechanics and Mechanical Engineering (MME 2015). WORLD SCIENTIFIC, 2016. http://dx.doi.org/10.1142/9789813145603_0091.

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Shimizu, Yusuke, Akira Kobayashi, Kazuhiro Watanabe, Emi Ohno, Makoto Echizenya, Katsuhide Fujita, Koji Mori, and Takashi Saito. "Study on Relations Between Abnormal Vibration and Friction Characteristics of a Roller Depending on Water Content for Three Types of Fined Coal." In ASME 2020 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/imece2020-24338.

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Abstract In coal-fired power generation, it is necessary to pulverize coal, and a vertical roller mill with excellent crushing efficiency has become the mainstream. However, In the process of pulverization by compression and shear, abnormal vibrations, which are considered to be self-excited vibration, occurs rarely. As a method of reducing self-excited vibration, adding water has been empirically performed in the field. Since the powder state changes due to water addition, it is necessary to investigate how the vibration characteristics and slip characteristics change. In this paper, we examined the effects of adding water to Artificial coal, Sub-bituminous coal A, and Sub-bituminous coal B with different powder characteristics on the dynamic friction characteristics and dynamic response generated between the roller and the powder. Investigating the relation between the RMS value of the horizontal acceleration response and the slip ratio indicates the degree of slippage of the roller. Next, we investigated the relation between the dynamic frictional characteristics generated during rolling and the slip ratio and found that the Slip-Stick phenomenon remarkably appeared at the test machine speed at which the vibration acceleration was maximum even when water was added. Also, a frequency analysis showed that when the vibration acceleration increased, the resonance frequency decreased, and the phenomenon of uniting was confirmed for all types of coal, suggesting that the abnormal vibration that occurred was self-excited vibration.
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Dmitry, Popolov, Zaitsev Gennady, Zaselskiy Igor, Velitchenko Vladimir, Konovalenko Vadim, and Kormer Marina. "Experimental Studies of the Process of Crushing Coal Charge on Hammer Mill with the View of Introducing Technologies and Products 4.0 at the Industrial Enterprises." In III International Scientific Congress Society of Ambient Intelligence 2020 (ISC-SAI 2020). Paris, France: Atlantis Press, 2020. http://dx.doi.org/10.2991/aebmr.k.200318.014.

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Peng, Hao-Yi, Ping Zhou, Jie-Min Zhou, and Fu-Bing Tu. "Orthogonal Experimental Study on Lime Shaft Furnace Briquettes as a Coke Substitute." In ASME 2008 International Mechanical Engineering Congress and Exposition. ASMEDC, 2008. http://dx.doi.org/10.1115/imece2008-69026.

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This paper studied the lime-shaft-furnace briquette used as a substitute for coke with an orthogonal experiment. The main material of briquette was the low-rank anthracite from Jinzhunshan of Hunan, China. The binder of briquette in this experiment was a compound binder including the magnesium-base curing agent, activator, biomass fiber and calcium lingosulfonate. The orthogonal table of L27(313) was chosen in this experiment and its factors consist of the magnesium-base curing agent, activator, biomass fiber, calcium lignosulfonate, mixture ratio of bituminous coal, briquetting pressure, briquetting water and size-composition of anthracite. The original compressive strength, original curshing strength, cold compressive strength, cold crushing strength, hot compressive strength and the heat stability of the briquettes made in this experiment were tested according to the Chinese relevant briquette test national standards. The test results were processed utilizing the method of the total probability formula evaluation. Based on the range analysis and analysis of variance, the optimal component of the compound binder and correlative key briquetting parameters were obtained, namely, 4 percent of magnesium-base curing agent, 1 percent of biomass fiber, 1 percent of activator, 0.12 percent of calcium lignosulfonate, and 20kN briquetting pressure, 17 percent of briquetting water, 10 percent mixture ratio of bituminous coal and the size-composition of anthracite with 58 percent of less than 0.5mm size, 14 percent of between 0.5mm and 1.0mm size, 17 percent of between 1.0mm and 2.0mm size and 11 percent of between 2.0mm and 3.0mm size. Analyzed were the mechanism of the compound binder and the optimal parameters of briquetting technics. The experimental results showed that the lime-shaft-furnace briquette prepared according to the optimal scheme obtained in this experiment could basically demand the industrial production of lime-shaft furnace as the substitute for coke.
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Bissert, Peter T., Joseph P. DuCarme, Jacob L. Carr, Christopher C. Jobes, and Jeffrey A. Yonkey. "Performance Summary of Continuous Mining Machine Proximity Detection Systems." In ASME 2016 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/imece2016-65536.

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Since 1984, remote controlled continuous mining machines (CMM) have caused 40 crushing and pinning fatalities in the United States. Due to limited space in the underground environment and visibility needs, CMM operators typically work close to the machine which exposes them to the danger of being struck or pinned by it. Because of these fatalities, the Mine Safety and Health Administration (MSHA) has published a rule requiring proximity detection systems (PDSs) on all CMMs except for full-face machines. To test PDS performance, researchers at the National Institute for Occupational Safety and Health (NIOSH) conducted a series of field tests in underground coal mines throughout the United States on CMMs equipped with PDSs. The field tests collected data under a variety of conditions to evaluate the warning and shutdown zone performance of these systems. A baseline test condition was measured when the machine was operating in non-mining mode. Three additional conditions discussed in this paper include testing of the PDS while the machine was operating in mining mode, examining the possibility of parasitic coupling to the trailing cable, and examining the effects of the presence of a shuttle car. The results of this study indicate that the average warning and stop zones vary minimally between non-mining mode and trailing cable influence measurements, as well as between the mining mode and shuttle car presence tests. A majority of the measurements for warning and stop zones showed repeatability within +/− 5 inches (12.7 cm). Additionally, parasitic coupling to the trailing cable was not experienced during this field testing. However, these results show that the range of stop zone measurements varied by 4.7 ft on average and as much as 11.7 ft in different field sites. This is most likely due to individual preferences by operators during installation when the warning and stop zone distances are set. While a PDS should effectively stop a CMM when an operator gets too close to the machine, the large variations between field test measurements indicate that there is a wide variation of performance established during system installation.
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