Mineralogical, Chemical and Morphological Studies of Fly Ashes from Thermal Power Stations of India
Mineralogical, chemical and morphological characteristics of fly ash collected from three thermal power stations viz. Bokaro Thermal Power Station (BTPS), Chandrapura Thermal Power Station (CTPS) and Durgapur Thermal Power Station (DTPS) of Damodar Valley Corporation (DVC), India have been well addressed in the present paper through analytical studies. The study reflects that all three samples are F type of fly ashes. According to mineralogical study quartz is the major component in all the three fly ash samples while the minor components are magnetite and hematite. Morphological study using scanning electron microscopy technique has revealed that the fly ash samples consist of spherical (solid or hollow spheres), oval or irregularly shaped particles of varying size. The study has also shown that the fly ashes from these thermal power stations can be used for various purposes such as backfilling in open cast mines, stowing in underground mines, cement manufacture, in paints as an extender, reclamation of subsided land etc.
Ashokan, P. et al. (2003). Characteristics Variation of Coal Combustion Residues in an Indian ash Pond. Waste Management & Research, 22: 265-275.
Ashokan, P. et al. (2005). Coal Combustion Residues – Environmental Implications and Recycling Potential. Resource, Conservation and Recycling, 43(3): 239-262.
Blanco, F. et al. (2005). Variation in fly ash properties with milling and acid leaching. Fuel, 84(1): 89-96.
Bakharev, T. (2005). Geopolymeric Materials prepared using class F Fly ash and Elevated Temperature Curing. Cement and Concrete Research, 35(6): 1224-1232.
Bhattacharjee, U. and T.C. Kandpal (2002). Potential of Fly Ash Utilisation in India. Energy, 27(2): 151-166.
Coal Wing, Geological Survey of India, Calcutta, 2006(www.gsi.org)
Das, S.K. (2003). Morphology of some Indian Fly Ashes. Indian Concrete Journal, 77: 12-16.
Das, S.K. and Yudhbir (2005). Geotechnical Characterization of Some Indian Fly Ashes. J. Mat. in Civil Engg., 17(5): 544-552.
Georgakopoulos, A. (2003). Chemistry and Morphology of Fly Ash Samples from the main Lignite Power stations of Northern Greece. 8th International conference on Environmental Science and Technology, Leninos Island, Greece, September 8-10, pp. 256-263.
Iyer, R.S. and J.A. Scott (2001). Power Station fly ash – A Review of Value-added Utilization outside of the Construction Industry. Resources, Conservation and Recycling, 31(3): 217-228.
Ilic, M. et al. (2003). Mineralogy and Microstructure of Sintered Lignite Coal Fly Ash. Fuel, 82(3): 331-336.
Jaarsveld, J.G.S.V. et al. (2003). The Characterisation of source materials in fly ash-based geopolymers. Materials Letters,57(7): 1272-1280.
Kumar, V. et al. (2003). Management of Fly Ash in India: A Perspective. 3rd International Conference – Fly Ash Utilisation and Disposal, 19-21 February, New Delhi, India.
Kumar, V. et al. (2003). Key Note Address. 3rd International Conference – Fly Ash Utilisation and Disposal, 19-21 February, New Delhi, India.
Kumar, V. and M. Mathur (2005). Fly ash in Roads and Embankments. National Seminar and Business Meet on Use of Fly Ash in Roads and Embankments. Allahabad, pp. 3- 15.
Ministry of Coal. Annual Report, 2005 (www.coal.nic.in)
Ministry of Power. Annual Report, 2005(www.powermin.nic.in)
Morena et al. (2005). Physico-chemical Characteristics of European Pulverized Coal Combustion Fly Ashes. Fuel,84: 1351-1363.
Ojha, K., Narayan, C., Pradhan and A.N. Samanta (2004). Zeolite from Fly Ash: Synthesis & Characterization. Bull- Mater. Sci., 27(6): 555-564.
Pandian, N.S. (2004). Fly Ash Characterization with reference to Geotechnical Application. J. Indian Inst. Sci., 84: 189-216.
Phair, J.W. et al. (2000). Mechanism of polysialation in the incorporation of zirconia into fly ash-based geopolymers. Industrial and Engineering Chemistry Research, 39: 2925- 2934.
Sarkar, A. et al. (2006). A Comprehensive Characterization of Fly ash from a Thermal Power Plant in Eastern India. Journal of Fuel Processing Technology, 87: 259-277.
Singh, G. et al. (2007). Assessment of Trace Elements Leaching of Coal Combustion Residues from Bokaro Thermal Power Station. Journal of Environmental Science & Engineering,
49(1): 77-86.
Saxena, N.C. (2003). Utilization of Fly Ash in Mines. National Seminar on Fly Ash Utilization, Chhattisgarh, Korba, 29- 30 January.
Saxena, et al. (2003). Fly Ash – To Convert the Waste Land into Productive Land and in Developing Alternative Cost Effective Building Materials. Chhattisgarh, Korba, January, 29-30.
Teri Energy Directory & Data Yearbook, 2003-04.
Vassilev, S.V. and C.G. Vassileva (2007). A New Approach for the Classification of Coal Fly Ashes based on their Origin, Composition, Properties and Behaviour. Fuel, 86: 267-299.
Xu, H. and J.S.J.V. Deventer (2000). The geopolymerisation of alumino-silicate minerals. International Journal of Mineral Processing, 59: 247-266.