Rheological Behavior of Fly Ash Suspension with Additive for Hydraulic Conveyance

  • 1 Department of Mechanical Engineering, K.R. Mangalam University, Gurugram, India

Abstract

In the present work, rheological behaviour of a fine particulate fly ash slurry suspension is studied with and without addition of an additive. Rheological experiments are performed for the range of shear rate from 50 to 200 s1. Sodium sulfate is used as an additive in the fraction of 0.2, 0.4 and 0.6% (by weight). Addition of sodium sulfate to the fly ash slurry suspension leads to an improvement of its rheological characteristics. A reduction in relative viscosity and pressure drop is more pronounced with the addition of sodium sulfate in proportion of 0.4%, while marginal with 0.2 and 0.6% (by weight). The analysis reveals that the fly ash suspension has a potential to for being transported in a slurry pipeline with higher concentration and minimum energy consumption.

If the inline PDF is not rendering correctly, you can download the PDF file here.

  • [1] Naik H.K., Mishra M.K. and Rao U.M. (2011): Evaluation of flow characteristics of fly ash slurry at 40% solid concentration with and without additives. World of coal Ash Conference May 9-12 (U.S.A. Denever). pp.1-15.

  • [2] Kumar K., Kumar S. and Kumar A. (2018): Effect of additives on static settled concentration, pH and viscosity of bottom ash-water suspension. − Journal of Mechanical Engineering – Strojnícky Časopis, vol.68, No.3, pp.49-58.

  • [3] Kumar K., Kumar S., Gupta M. and Garg H.C. (2017): Measurement of flow characteristics for multiparticulate bottom ash-water suspension with additives. − Journal of Residual Science and Technology, vol.14, No.1, pp.11-17.

  • [4] Kumar S., Kumar K. and Gupta M. (2016): Characterization of heavy metal trace elements in the fly ash from a thermal power plant. − Energy Sources Part A: Recovery, Utilization and Environmental Effects, vol.38, No.16, pp.2370-2376.

  • [5] Kumar S., Mohapatra S.K. and Gandhi B.K. (2013): Effect of addition of fly ash and drag reducing on the rheological properties of bottom ash. − International Journal of Mechanical Material Engineering, vol.8, pp.1-8.

  • [6] Convery M., Downing L., Yin C.Y., Goh B.M. and Sharifah A.S.H.A.K. (2010): Characterization of glass ceramics produced from vetrification of class f malaysian coal fly ash. − International Journal of Mechanical and Materials Engineering, vol.5, No.1, pp.1-4.

  • [7] Lorenzi L.D. and Bevilacqua P. (2002): The influence of particle size distribution and nonionic surfactant on the rheology of coal water fuels produced using Iranian and Venezuelan coals. − Coal Preparation, vol.22, No.5, pp.249-268.

  • [8] Singh G., Kumar S., Singh M.K. and Mohapatra S.K. (2016): Environmental impact assessment of ash disposal system of a thermal power plant. − International Journal of Hydrogen Energy, vol.41, No.35, pp.15887-15891.

  • [9] Kumar K., Kumar S., Gupta M. and Garg H.C. (2016): Effect of addition of bottom ash on the rheological properties of fly ash slurry at varying temperature. − IOP Conf. Series: Materials Science and Engineering, vol.149; 012044.

  • [10] Parida A., Senapati P.K. and Mishra B.K. (2006): Slurry pipeline for fly ash- a design method for energy efficient fly ash disposal by hydraulics conveying. − Bulk Solids Handling, vol.26, pp.556-562.

  • [11] Kumar S., Gandhi B.K. and Mohapatra S.K. (2014): Performance characteristics of centrifugal slurry pump with multi-sized particulate bottom and fly ash mixture. − Particulate Science and Technology, vol.32, No.5, pp.466-476.

  • [12] Seshadri V., Singh S.N., Jain K.K. and Verma A.K. (2008): Effect of additive on head loss in the high concentration slurry disposal of fly ash. − Journal of Institute of Engineering (India), vol.89, pp.3-10.

  • [13] Senapati P.K. and Mishra A.K. (2015): Bulk hydraulic disposal of highly concentrated fly a ash and bottom ash-water slurries. − Particulate Science and Technology, vol.33, No.2, pp.124-131.

  • [14] Mosa E.S., Saleh A.H.M., Taha T.A. and EI-Molla A.M. (2008): Effect of chemical additives on flow characteristics of coal slurries. − Physicochemical Problems of Mineral Processing, vol.42, pp.107-118.

  • [15] Buckingham E. (1921): On plastic flow throu gh capillary tubes. − ASTM Proceeding, vol.29, pp.1154-1156.

  • [16] Darby R. and Melson J. (1981): How to predict the friction factor for flow of Bingham plastics. − Chemical Engineering, vol.88, No.26, pp.59-61.

  • [17] Chandel S., Singh S.N. and Seshadri V. (2009): Deposition characteristics of coal ash slurries at higher concentrations. − Advanced Powder Technology, vol.20, No.4, pp.383-389.

OPEN ACCESS

Journal + Issues

Search