Studies on the Characterization of Indian Coals Using FE-SEM and EDS and its Relevance to Coal Washability
Authors
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Scientist, CSIR-Central Institute of Mining & Fuel Research, Dhanbad ,IN
K. M. P. Singh -
Scientist, CSIR-Central Institute of Mining & Fuel Research, Dhanbad ,INPriyanka Kumari Ujala
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Sr. Principal Scientist & Head, of Head Research Grouop, CSIR-Central Institute of Mining & Fuel Research, Dhanbad ,INT. Gouri Charan
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Scientist, CSIR-Central Institute of Mining & Fuel Research, Dhanbad ,ING. V. Ramana
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Scientist, CSIR-Central Institute of Mining & Fuel Research, Dhanbad ,INAnandaya Sinha
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Director, CSIR-Central Institute of Mining & Fuel Research, Dhanbad ,INPradeep K. Singh
Keywords:
No Keywords.Abstract
The basic objective of coal washability is to establish the set of maximum possible separation performance for a given coal feed and to access the cut gravity for achieving clean coal of desired quality. The conventional float-sink (F-S) analysis is time taking, hazardous and at the same time costly. Indian coals are of drift origin and vary widely in the washability characteristics and there is also wide variation from seam to seam at the same mine. The washery is to be fed with coals from multiple sources/seams, which are having wide washability characteristics. The standard practice of washability will not help the washery to improve its performance as a result an alternative online analyzer especially for a commercial coal washing plants which maximize the reliability of actual coal washability in conjunction with particle size distribution, ash, etc is the need of the hour.
Researchers worldwide, are trying to establish the washability characteristics of coal through different routes X-ray/gamma, basically imaged based/processing to solve the problem. An automated coal washability analyser is being under developmental stage which will give near real-time F-S data that would maximize the yield at desired ash level and impact positively on the profitability of the plant operation. The results are very promising with the actual standard float and sink data to the coal analysed with the X-ray analyser, which are being highlighted in the present paper.
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References
Dhar, J. and Niyogi, B. B. (1942): X- Ray studies in Indian coals, Part I, Volume VIII, No. 1 Published on March 18th 1942, pp. 127-138.
Lin, C. L. and Miller, J. D. (1996): “Cone beam X-ray Microtomography for three-dimensional liberation analysis in the 21st Century,” Int. J. Miner. Process, 47 (1996) 61-73.
Lin, C. L., Miller, J. D., Luttrell, G. H. and Adel, G. T. (1999): Development of an on - line coal washability analyzer, Semi- annual Report, (10/01/1998-03/31/1999), University of Utah, Department of Metallurgical Engineering, 31st March, (1999).
Lin, C. L. and Miller, J. D. (2000): “Development of an On-line Coal Washability Analysis System Using X-ray Computed Tomography,” Coal Preparation, Vol. 21. pp. 383-409 (2000).
Lin, C. L., Miller, J. D., Luttrell, G. H. and Adel, G. T. (2001): Development of an on-line coal washability analyzer, Final Report, University of Utah, Department of Metallurgical Engineering, June, 2001.
Lin, C. L., Miller, J. D. and Luttrell, G. H. (2002): “Evaluation of a CT-based coal washability analysis system under simulated on line conditions,” Minerals and Metallurgical Processing, vol. 19, No. 1, 2002.
Miller, J. D. and Lin, C. L. (2003): 3D analysis of particulates in mineral processing systems by cone beam X - ray Microtomography, XXII IMPC, pp. 1561-1570, 29 September- 3 October 2003, Cape Town South Africa.
Adel, Gregory T. and Wang, Damin (2005): “The Assessment of Fine Coal Cleanability,” Coal Preparation, 25: 129-140, 2005.
Videla, A. R., Lin, C. L. and Miller, J. D. (2007): “3D characterization of individual multiphase particles in packed particle beds by X-ray Microtomography (XMT),” Int. J. Miner. Process. 84 (2007) 321-326.
Schena, Gianni, Santoro, Luca and Favretto, Stefano (2007): “Conceiving a high resolution and fast X-ray CT system for imaging fine multi-phase mineral particles and retrieving mineral liberation spectra,” Int. J. Miner. Process. 84 (2007) 327-336
Miller, Jan D., Lin, Chen-Luh, Hupka, Lukasz and Al-Wakeel, Mohamed I. (2009): “Liberation-limited grade/recovery curves from X-ray micro CT analysis of feed; material for the evaluation of separation efficiency,” Int. J. Miner. Process. 93 (2009) 48-53.
Lin, C. L. and Miller, J. D. (2010): Advances in X-ray Computed Tomography (CT) for Improved Coal Washability Analysis, 16th International Coal Prep Congress (ICPC 2010), April 25-29, 2010, Lexington, Kentucky, USA.
Strydom, Hayley (2010): The application of dual energy X - ray transmission sorting to the separation of coal from torbanite; M S Thesis, Johannesburg, South Africa, 2010.
Bachmann, Jan F., Bachmann, Claus C., Cipold, Michael P., Wurst, Helge B., Springer, Hauke (Germany) and Laurila, Mel J. (USA) (2012): Washability Monitor for Coal Utilizing Optical and X-Ray Analysis Techniques, 2012.
Shamaila, S., Ntsoelengoe, B., Bachmann, J., Wurst, H. and Cipold, M. (2012): “Development of a prototype X-ray transmission washability monitor,” The Journal of The Southern African Institute of Mining and Metallurgy, volume 1, 12 March 2012, pp. 179-184.
Atkinson, B. and Swanson, A. (2016): Further development in washability prediction Using coal grain analysis XVIII international coal preparation Congress 28June-01July, 2016, pp 73-78.
von Ketelhodt, L. and Bergmann, C.: “Dual energy X-ray transmission sorting of coal,” The Journal of The Southern African Institute of Mining and Metallurgy, Vol. 110, 371-378.
Science note, Otago Witness, August 25, 1898, page 54.
Wurst, Helge B., Bachmann, Jan F., Bachmann, Claus C. and Cipold, Michael P. (2013): Washability Monitor for Coal Utilizing Optical and X-Ray Analysis Techniques, 17th International Coal Preparation Conference 1-6 October 2013, Istanbul, Turkey.
Brown, Douglasw, and Atkin, Brian P. (2000): “A Method for the Rapid On-site Assessment of Handleability,” Coal Preparation, Vol. 21, 2000, pp. 299-313.
Miller, J. D., Lin, C. L., Luttrell, G. H. and Adel, G. T. (2001): Development of an on-line coal washability analyzer, final project report, June 26, 2001, Submitted to: United States Department of Energy, Federal Energy Technology Center, United States.
Lin, C. L. and Miller, J. D. (2005): “3D characterization and analysis of particle shape using X-ray micro-tomography (XMT).” Powder Technol 2005; 154(1):61-9.
Plackowski, C., Nguyen, A. V., Lin, C. L. and Miller, J. D. (2015): “Non-destructive characterization of borehole coal samples using X CT technology.” ACARP Project C23024 report, May 2015.
Wang, Y., Lin, C. L. and Miller, J. D. (2015): “Improved 3D image segmentation for X-ray tomographic analysis of packed particle beds.” Miner Eng 2015, 83:185-91.
Sheppard, A. P., Sok, R. M. and Averdunk, H. (2004): “Techniques for image enhancement and segmentation of tomographic images of porous materials.” Phys A, 2004, 339(1):145-51.
Soille, P. (2004): Morphological image analysis: principles and applications. Berlin Heidelberg: Springer-Verlag; 2004.
Viljoen, J, Campbell, Q. P., Roux, M. I. and Beer, F. D. (2015): “An analysis of the slow compression breakage of coal using microfocus X-ray computed tomography.” International J Coal Preparation and Utilization, 2015, 35(1):1-13.
Borgefors, G. (1986): “Distance transformations in digital images.” Comput Vis Graph Image Process, 1986; 34(3):344-71.
Liu, Hongping, Rodrigues, Sandra, Shi, Fengnian, Esterle, Joan and Manlapig, Emmanuel (2017): “Coal washability analysis using X-ray tomographic images for different lithotypes,” Fuel 209 (2017) 162-171.
Bachmann, Jan, et al (2016): Online Washability: Comparison of Dual Parameter and Triple Parameter Analysis, XVIII International Coal Preparation Congress, 2016, pp 255-260.
Zhu, Qian (2014): “Coal sampling and analysis standards” Clean Coal Center, IEA publisher April 2014.
