Academic literature on the topic 'Coal Coal washing. Fluidization'

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Journal articles on the topic "Coal Coal washing. Fluidization"

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Modiga, Agnes, Ndabenhle Sosibo, Nirdesh Singh, and Getrude Marape. "A Feasibility Study Evaluating the Efficiency of Fine Coal Washing Using Gravity Separation Methods." Academic Research Community publication 2, no. 4 (2019): 497. http://dx.doi.org/10.21625/archive.v2i4.394.

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Coal mining and washing activities in South Africa often lead to the generation of
 fine and ultra-fine coal which is in most cases discarded due to high handling and
 transportation costs. Studies conducted revealed that a large quantity of these fines
 have market acceptable calorific values and lower ash contents. In order to reduce
 fines discarded, processes have been developed to re-mine and process the fine coal
 discards with the aim of improving the calorific value, adding them to coarse washed
 coal to increase the yield as well as pelletizing the fines so as to meet the market
 specifications in terms of size.
 The goal of this study was to evaluate the efficiency of fine coal washing using
 gravity separation methods and comparing the products thereof to the market
 specifications with regards to the calorific value and the ash content. Coal fines from
 the No.4 lower seam of the Witbank coalfield in South Africa resulting from a dry
 coal sorting plant were subjected to a double-stage spiral test work, heavy liquid
 separation and reflux classifier test work respectively.
 The reflux classifier achieved products with low ash content and an increased
 calorific value, at high mass yields. At higher fluidization water flowrate, the reflux
 classifier performance was superior to that of the spirals with products of lower ash
 content and higher calorific value. At low cut point densities, heavy liquid separation
 yielded the cleanest products with very low ash content but at much lower mass
 yields. As the density increased, the mass yields increased with the ash content while
 the calorific value decreased. Most of the products from the different processes met
 most of the local industries’ specifications but none of them met the export market
 as well as the gold and uranium industry specifications due to the high ash content.
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Song, Chun Yan, Yong Liang Gui, Yan Shi, and Bin Sheng Hu. "Fluiding Characteristics of Pulverized Coal in Fluidization & Injection Jar." Advanced Materials Research 418-420 (December 2011): 2130–33. http://dx.doi.org/10.4028/www.scientific.net/amr.418-420.2130.

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The fluiding characteristics of pulverized coal in fluidization & injection jar were studied systematically with the conveying property testing equipment of pulverized coal designed by ourselves. Results show that the fluidization process of pulverized coal in fluidization & injection jar is a progressive process. The necessary condition of fluidization for pulverized coal in fluidization & injection jar is that the actual fluiding velocity exceeds the theoretical fluiding velocity. According to the moving state of pulverized coal particles in fluidized and injection jar, the fluidization process of pulverized coal consists of three stages of static bed, fluidization bed and gas flow bed.
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Wang, Hui Feng, Zhi Qiang Xu, and Da Niu Pei. "Study on Electrolyte for Coal Washing in Coal Slurry Sedimentation." Advanced Materials Research 518-523 (May 2012): 3195–99. http://dx.doi.org/10.4028/www.scientific.net/amr.518-523.3195.

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Introduced the current situation of coal slurry difficult sedimentation because of clay easily expansion and hydration to form colloidal suspensions. Experiments of suppressing montmorillonite using several different electrolyte solution was done. The results show that KCl solution can inhibit expansion and hydration of montmorillonite and improve its sedimentation effect significantly and reduce the amount of flocculant greatly. After raw coal sedimentation comparative test, the results show that washing coal by KCl solution can indeed promote coal slurry sedimentation effectively, and the dosage of flocculant is only about 2.5% that of water washed coal.
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Pata, Jaroslav, Milan Carsky, Miloslav Hartman, and Vaclav Vesely. "Minimum fluidization velocities of wet coal particles." Industrial & Engineering Chemistry Research 27, no. 8 (1988): 1493–96. http://dx.doi.org/10.1021/ie00080a023.

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Zhao, Xin Jun, Qi Tai Eri, and Qiang Wang. "Fluidization Properties and Mixing Properties of Binary Mixtures of Quartz Sand and Coal Char in Fluidized Bed." Advanced Materials Research 997 (August 2014): 554–59. http://dx.doi.org/10.4028/www.scientific.net/amr.997.554.

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To study the fluidization properties and mixing properties of binary mixtures of quartz sand and coal char, the experiments were carried out in fluidized bed with an inner diameter of 50 mm. The pressure drop lines and mixing index were obtained under different operating conditions with changing the static bed height and the volume fraction of coal char. A new formula of mixing index was proposed to consider the difference of horizontal mixing behavior. The result showed that the static bed height does not make an appreciable influence to minimum fluidization velocity and fluidization status. However, the volume fraction of coal char affected the minimum fluidization velocity obviously, and the minimum fluidization velocity decreased monotonously with decreasing the volume fraction. Although the small volume fraction of coal char was good for mixing, the effect was limited by the height of bed and the mixing index becomes constant almost at 80mm static bed height when the volume fraction was less than 0.4.
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Villanueva, Hernan, and Harmeet Lamba. "Operator guidance system for coal washing." Artificial Intelligence in Engineering 12, no. 3 (1998): 261–73. http://dx.doi.org/10.1016/s0954-1810(97)10003-6.

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SUBASINGHE, G. K. N. S., and E. G. KELLY. "Model of a Coal Washing Spiral." Coal Preparation 9, no. 1-2 (1991): 1–11. http://dx.doi.org/10.1080/07349349108960553.

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LI, M., C. J. WOOD, and J. J. DAVIS. "A Study of Coal Washing Spirals." Coal Preparation 12, no. 1-4 (1993): 117–31. http://dx.doi.org/10.1080/07349349308905113.

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Liu, Xuemin, Hairui Yang, and Junfu Lyu. "Optimization of Fluidization State of a Circulating Fluidized Bed Boiler for Economical Operation." Energies 13, no. 2 (2020): 376. http://dx.doi.org/10.3390/en13020376.

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To reduce the auxiliary power consumption and improve the reliability of large-scale circulating fluidized bed (CFB) boilers, we developed energy-saving CFB combustion technology based on the fluidization state re-specification. A calculation model of coal comminution energy consumption was used to analyze the change in comminution energy consumption, and a 1D CFB combustion model was modified to predict the operation parameters under the fluidization state optimization conditions. With a CFB boiler of 480 t/h, the effect of fluidization state optimization on the economical operation was analyzed using the above two models. We found that combustion efficiency presents a nonmonotonic trend with the change in the bed pressure drop and feeding coal size. There are an optimal bed pressure drop and a corresponding feeding coal size distribution, under which the net coal consumption is the lowest. Low bed pressure drop operation achieved by reducing the coal particle size is not beneficial to SO2 and NOx emission control, and the pollutant control cost increases. The effect of fluidization state optimization on the gross cost of power supply can be calculated, and the optimal bed pressure drop can be obtained.
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Shah, N. D., C. D. Chriswell, and R. Markuszewski. "Separation by Countercurrent Washing of Coal-Caustic Mixtures during Chemical Coal Cleaning." Separation Science and Technology 24, no. 1-2 (1989): 79–95. http://dx.doi.org/10.1080/01496398908049753.

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Dissertations / Theses on the topic "Coal Coal washing. Fluidization"

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Musser, Jordan M. H. "Development of a separation riser with flow pulsations for small coal particles." Morgantown, W. Va. : [West Virginia University Libraries], 2007. https://eidr.wvu.edu/etd/documentdata.eTD?documentid=4997.

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Thesis (M.S.)--West Virginia University, 2007.<br>Title from document title page. Document formatted into pages; contains xiii, 99 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 70-72).
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Yan, He Leo, and 嚴鶴. "Revitalization of abandoned coal washing site." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2012. http://hdl.handle.net/10722/196519.

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Pugalia, Neeraj. "Numerical modeling of cold flow and hot gas desulfurization in a circulating fluidized bed." Morgantown, W. Va. : [West Virginia University Libraries], 2001. http://etd.wvu.edu/templates/showETD.cfm?recnum=2056.

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Thesis (M.S.)--West Virginia University, 2001.<br>Title from document title page. Document formatted into pages; contains xvi, 119 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 103-106).
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Davis, Van Leslie. "Characterization and scale-up of microbubble generation in column flotation." Thesis, This resource online, 1990. http://scholar.lib.vt.edu/theses/available/etd-03242009-040658/.

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Che, Zhuping. "Application and evaluation of spiral separators for fine coal cleaning." Morgantown, W. Va. : [West Virginia University Libraries], 2009. http://hdl.handle.net/10450/10760.

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Thesis (M.S.)--West Virginia University, 2009.<br>Title from document title page. Document formatted into pages; contains viii, 72 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 46-48).
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Brown, Michael Duane. "An investigation of fine coal grinding kinetics." Thesis, Virginia Tech, 1986. http://hdl.handle.net/10919/45752.

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In recent years, a great deal of interest has been shown in developing methods for preparing super—clean coal containing less than 2% ash and 0.5% sulfur. New techniques for recovering fine coal, such as micro—bubble flotation, can achieve the desired result provided mineral matter is sufficiently liberated. To achieve sufficient liberation, however, it is often necessary to grind to a mean particle size finer than 10 microns. Since conventional ball mills are highly inefficient in this fine size range, the stirred ball mill has been proposed as a more suitable means for ultrafine grinding.<br>Master of Science
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pottimurthy, yaswanth. "Iron-Based Coal Direct Chemical Looping Process: Operation of Sub Pilot Scale Unit with Ohio #6 Bituminous Coal." The Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu1492129127522893.

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Oliver, Edmund T. "An investigation into the liberation characteristics of coal middlings." Thesis, University of Nottingham, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.352934.

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Paul, Anton Dilojaan. "Electrocatalytically induced liberation of mineral matter from coal." Diss., Virginia Polytechnic Institute and State University, 1988. http://hdl.handle.net/10919/82636.

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A new method for demineralizing coal has been developed which is based on the osmotic pressures that occur when electrical double layers overlap. In this technique, coal is exposed to ferric ions in an acidic medium which causes the coal to lose electrons and become positively charged, thereby establishing ionic double layers in the vicinity of its surface. Inside the pores and crevices in which mineral matter is entrapped, the ionic double layers overlap and reduce the chemical potential of water, creating an osmotic pressure. The build-up of such pressure pushes the mineral matter out of the crevices, resulting in mineral liberation. Since the process, which is termed electro catalytically induced liberation (EIL), relies on surface-chemical reactions, the energy consumption is substantially lower than in conventional liberation processes based on comminution. Tests on several different seams of coal from varying geological locations have indicated that the process may be used to remove over 70% of the mineral matter present in coal. Mass balance studies conducted on a Wyodak coal indicate that approximately 90% of the ash removed is by the EIL mechanism, while the balance may be attributed to acid dissolution and the loss of material during handling. Scanning electron micrographs of the coal samples taken before and after treatment show morphological changes consistent with the proposed EIL mechanism. The technique has been used successfully to clean bituminous coals, low-rank coals and preparation plant refuse, and to further reduce the ash content of coals pre-cleaned by other means. A theoretical model has been developed to calculate the osmotic pressure that occurs inside a typical coal crevice during the EIL treatment. The changes in the aqueous chemical potential are calculated using semi-empirical equations derived from solution theory, while partial molar volume changes are accounted for in the final calculation of the osmotic pressure. The model indicates that pressures on the order of 4-7 atmospheres can develop inside crevices with walls 100-1000Å apart. These values are numerically consistent with those predicted by other models developed using different approaches.<br>Ph. D.
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Panday, Rupendranath. "Modeling, identification and control of a cold flow circulating fluidized bed." Morgantown, W. Va. : [West Virginia University Libraries], 2008. https://eidr.wvu.edu/etd/documentdata.eTD?documentid=5833.

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Thesis (M.S.)--West Virginia University, 2008.<br>Title from document title page. Document formatted into pages; contains xiii, 99 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 94-99).
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Books on the topic "Coal Coal washing. Fluidization"

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Demir, Ilham. Washability of trace elements in product (marketed) coals from Illinois mines. Illinois Dept. of Energy and Natural Resources, Illinois State Geological Survey, 1995.

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White, D. M. Assessment of control technologies for reducing emissions of SOb2s and NOx from existing coal-fired utility boilers: Project summary. U.S. Environmental Protection Agency, Air and Energy Engineering Research Laboratory, 1991.

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Zhongguo jie jing mei ji shu. Zhongguo wu zi chu ban she, 1998.

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Larkin, L. Economic evaluation of oil agglomeration for recovery of fine coal refuse. U.S. Environmental Protection Agency, Air and Energy Engineering Research Laboratory, 1986.

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Zhongguo jie jing mei ji shu. Mei tan gong ye chu ban she, 2012.

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Herhal, Albert J. Assessment of physical coal cleaning practices for sulphur removal: Project summary. U.S. Environmental Protection Agency, Air and Energy Engineering Research Laboratory, 1991.

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Canada Centre for Mineral and Energy Technology. Coal Preparation Washing Processes: A Technology Review. s.n, 1985.

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Onursal, A. Bekir. Evaluation of conventional and advanced coal cleaning techniques. U.S. Environmental Protection Agency, Air and Energy Engineering Research Laboratory, 1986.

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Onursal, Bekir. Evaluation of conventional and advanced coal cleaning techniques. U.S. Environmental Protection Agency, Air and Energy Engineering Research Laboratory, 1986.

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Read, R. B. Final technical report: The ISGS aggregate flotation fine coal cleaning process : Development, characterization and testing. Illinois State Geological Survey, 1987.

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Book chapters on the topic "Coal Coal washing. Fluidization"

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Bojarskiy, Dmitry, and Steve Frankland. "VOSTOCHNAYA COAL WASHING PLANT IMPROVEMENTS." In XVIII International Coal Preparation Congress. Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-40943-6_165.

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Venger, K. G., L. P. Myshlyaev, S. A. Fairushin, I. V. Dostovalova, G. P. Sazykin, and S. F. Kisilev. "Models and Control Algorithms of Coal Washing Processes." In XVIII International Coal Preparation Congress. Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-40943-6_27.

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Ergun, Levent, Ataallah Bahrami, Mustafa Ziypak, and Ayşe Özer. "In-Plant Testing of Teetered Bed Separator in Omerler Washing Plant." In XVIII International Coal Preparation Congress. Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-40943-6_131.

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Davaatseren, Gendeekhuu, and Magsar Bazarragchaa. "DRY ALLAIR® WASHING PILOT PLANT TEST RESULTS ON NARYN SUKHAIT’S MULTI LAYER COAL." In XVIII International Coal Preparation Congress. Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-40943-6_177.

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Yuan, Qing-he, Zong-qing Cui, and Chao Liu. "Study on the Estimation of Coal Washing and Processing Charges." In The 19th International Conference on Industrial Engineering and Engineering Management. Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-38427-1_92.

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"coal washing." In Dictionary Geotechnical Engineering/Wörterbuch GeoTechnik. Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-41714-6_32756.

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"Coal washing efficiency." In Coal Processing and Utilization. CRC Press, 2016. http://dx.doi.org/10.1201/b21459-39.

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"Global coal washing." In Coal Processing and Utilization. CRC Press, 2016. http://dx.doi.org/10.1201/b21459-41.

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Kumar, Dilip, and Deepak Kumar. "Coking Coal Washing." In Sustainable Management of Coal Preparation. Elsevier, 2018. http://dx.doi.org/10.1016/b978-0-12-812632-5.00007-0.

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Kumar, Dilip, and Deepak Kumar. "Fine Coal Washing." In Sustainable Management of Coal Preparation. Elsevier, 2018. http://dx.doi.org/10.1016/b978-0-12-812632-5.00008-2.

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Conference papers on the topic "Coal Coal washing. Fluidization"

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Adams, Bradley R., and Taylor L. Schroedter. "Modeling Pressurized Dense Phase Coal Fluidization and Transport." In ASME 2019 Power Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/power2019-1874.

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Abstract A transient gas-solid model based on CPFD Software’s Barracuda Virtual Reactor was developed for a feed system to a pilot-scale pressurized oxy-coal (POC) reactor. A simplified geometry with a vertical coal hopper feeding into a 0.635-cm diameter horizontal pipe was used to represent key elements of the feed system. Coal particles were transported with 20-atm CO2 gas. The feed system was required to maintain a steady flow of gas and solids at a coal flow rate of approximately 3.8 g/s and a CO2 to coal mass ratio in the range 1–2. Sensitivity of model results to mesh size and particle interaction sub-model settings was assessed. Two design concepts were evaluated. A gravity-fed concept was found to be infeasible due to inadequate coal flow rates even at very high CO2 to coal flow ratios. This was due to gravitational forces being insufficient to move the pressurized coal from the hopper into the CO2 stream at the desired rate. A fluidized bed concept was found to provide the desired coal flow rate and CO2 to coal flow ratio. CO2 injected at the hopper base first fluidized the vertical coal bed before transporting it through a horizontal exit pipe. A second CO2 inlet downstream of the hopper exit pipe was used to dilute the fluidized coal and increase pipe velocities to minimize coal drop out. The amount of coal transported from the hopper was dependent on the net CO2 hopper flow but independent of the CO2 dilution flow. This meant that the coal flow rate and CO2 to coal flow ratio could be controlled independently. Pipe exit coal flow rates were found to fluctuate at levels acceptable for steady burner operation.
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Estejab, Bahareh, and Francine Battaglia. "Modeling of Coal-Biomass Fluidization Using Computational Fluid Dynamics." In ASME 2013 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/imece2013-63339.

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In an effort to assess the fluidization characteristics of coal-biomass mixtures, computational fluid dynamics (CFD) was used and validated. The gas and solids phases were modeled using an Eulerian-Eulerian approach to efficiently simulate the physics. The computational platform Multiphase Flow with Interphase eXchanges (MFIX) was employed to simulate the particle-particle interactions of coal-biomass mixtures and compare the predictions with experimental data. The coal-biomass mixtures included sub-bituminous coal and hybrid poplar wood. Particles properties of both materials fall within the Geldart A classification. Of particular interest to this study was predicting particle mixing in fluidized beds and biomass hydrodynamics. Both materials and two mass ratio mixtures were studied and pressure drop across the bed for various gas inlet velocities and bed height were analyzed and compared to the experiments.
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Koca, H., S. Koca, and M. Karaoğlu. "Recovering of fine coal particles from tailing ponds of TKİ Alpagut-Dodurga coal washing plant." In The 8th International Mineral Processing Symposium. CRC Press, 2017. http://dx.doi.org/10.4324/9780203747117-81.

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Zhang, Gehong, Weisheng Guan, Pinghai Lv, and Junfa Gao. "Experimental research into flocculation sedimentation of acid coal washing wastewater in a coal preparation plant." In International Conference on Civil, Transportation and Environmental Engineering (CTEE 12). WIT Press, 2013. http://dx.doi.org/10.2495/ctee120631.

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Xinyu Wu. "Constructing the safety management information system of coal washing and dressing." In 2011 International Conference on Computer Science and Service System (CSSS). IEEE, 2011. http://dx.doi.org/10.1109/csss.2011.5974525.

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Zhang, Lijun, and Xiaohua Xia. "Coal washing plant cyclone module control with a pump-storage system." In 2015 34th Chinese Control Conference (CCC). IEEE, 2015. http://dx.doi.org/10.1109/chicc.2015.7259802.

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Romero Luna, Carlos Manuel, JOSE CARLOS ANDRADE, Gretta Larisa Aurora Arce Ferrufino, and Ivonete Ávila. "AN EXPERIMENTAL INVESTIGATION ON FLUIDIZATION OF TERNARY MIXTURE OF COAL, BIOMASS AND INERT." In 16th Brazilian Congress of Thermal Sciences and Engineering. ABCM, 2016. http://dx.doi.org/10.26678/abcm.encit2016.cit2016-0628.

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Liu, Zhongwen, and Feng Zhang. "The Study on Comprehensive Operation Optimization Management of Modern Coal Washing Enterprises." In 2010 International Conference on E-Product E-Service and E-Entertainment (ICEEE 2010). IEEE, 2010. http://dx.doi.org/10.1109/iceee.2010.5660794.

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Zhang, Lijun, Xiaohua Xia, and Bing Zhu. "Magnetite and water addition control for a dense medium coal washing circuit." In 2015 Chinese Automation Congress (CAC). IEEE, 2015. http://dx.doi.org/10.1109/cac.2015.7382785.

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Badulescu, Camelia. "TESTS FOR THE DESTABILIZATION OF ARGILLACEOUS SUSPENSIONS FROM WASTEWATER RESULTED AFTER COAL WASHING." In 15th International Multidisciplinary Scientific GeoConference SGEM2015. Stef92 Technology, 2011. http://dx.doi.org/10.5593/sgem2015/b11/s4.092.

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Reports on the topic "Coal Coal washing. Fluidization"

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Killmeyer, R. P., P. H. Zandhuis, M. V. Ciocco, W. Weldon, T. West, and D. Petrunak. Fine Anthracite Coal Washing Using Spirals. Office of Scientific and Technical Information (OSTI), 2001. http://dx.doi.org/10.2172/781457.

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Picard, J. L. Coal preparation washing processes: a technology review. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1985. http://dx.doi.org/10.4095/307007.

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