Utilization of Red Mud and Its Neutralisation for Safe Disposal

Suchita B. Rai*, Kailas L. Wasewar**
*Jawaharlal Nehru Aluminium Research Development and Design Centre, Nagpur.
** Dept of Chemical Engineering, VNIT, Nagpur.
Periodicity:February - April'2010
DOI : https://doi.org/10.26634/jfet.5.3.1137

Abstract

The century old technology, the Bayer process remains the most economic means of obtaining alumina from bauxite till date. Worldwide alumina is produced from bauxite by Bayer Process which generates highly alkaline solid waste (pH 12 - 13.5) known as Red Mud. Around 70 million tonnes of red mud per annum is generated world wide of which ~ 4 million tonne of red mud is generated annually in India. Disposal of such a huge quantity of alkaline solid waste is creating a big environmental issue leading to its alternative usage / utilization methods. Several routes of using red mud in effective ways have been tried and extensive research is still going on to find the most suitable and economic way of utilizing the same. It is an iron-rich residue which also contains undigested alumina, titania and sodium aluminosilicates. Indian Red Mud mainly consists of Fe2O3 (35-55 wt %), Al2O3 (16-22 wt %), SiO2 (4-16 wt %), Na2O (3-6 wt %), TiO2 (2-19 wt %), CaO (0.8-4.5 wt %) and other oxides in trace amount depending upon the mineralogy and process parameters used. Red mud is disposed as slurry having a high solid concentration of 30-60% and with a high ionic strength. It is disposed as dry or semi dry material in red mud pond or abandoned bauxite mines. The disposal of the red mud represents a major loss of valuable soda and has a high pH value as a result of the entrained soda.  The environmental concerns which are related to the disposal of red mud are its large quantity which consumes vast areas of land and its causticity. Problems associated with the disposal of red mud waste include its high pH (12-13), alkali seepage into underground water, safety in storage, and alkaline air borne dust impact on plant life. High iron content has also shown scope of metal / value added product recovery from the same. Many special adsorbent / compounds have been developed from red mud for pollution control purpose also. But these applications are not always economically viable because of source and surrounding conditions. So environmentally safe disposal has also been given importance; i.e. neutralization of red mud for safer disposal as well as amendment of red mud to support re-vegetation / vegetation cover in the plant and mine surrounding areas. At present, there is no viable process developed for utilising the bauxite residue, consequently this large quantity of waste material is required to be disposed economically and safely to the environment. In this paper, all different directions of red mud utilization are discussed. The paper also reviews the methods of neutralization for its safe disposal.

Keywords

Red Mud, Utilization, Disposal, Neutralization, Review, Indian Scenario.

How to Cite this Article?

Rai, S. B., and Wasewar, K. L. (2010). Utilization Of Red Mud And Its Neutralisation For Safe Disposal. i-manager’s Journal on Future Engineering and Technology, 5(3), 1-8. https://doi.org/10.26634/jfet.5.3.1137

References

[1]. Peter Newton, “Making Bricks with Red Mud in Jamaica,” IDRC, Resources, Books: Reports, Vol.21, No. 2.
[2]. Chaddha M.J., S. Rai and R.N. Goyal, “Characteristics of Red Mud of Indian Alumina Plants and their possible Utilisation”, ENVICON 2007, pp.41-44.
[3]. Wanchao Liu, Jiakuan Yang and Bo XiaRef, “Application of Bayer Red Mud for Iron Recovery and Building Material Production from Alumosilicate Residues,” Available online 8 April 2008.
[4]. Singh Maneesh, S.N. Upadhayay, P. M. Prasad, “Preparation of special cements from red mud,” Waste Management,Vol. 16,No. 8,pp. 1996, 665- 670.
[5]. “Method for Producing Bricks from Red Mud,” Document Type and Number: United States Patent 3886244.
[6]. H.H. Nakamura et al., "Use of Bauxite Wastes for Lightweight Building Products," Ceramic Bulletin, March, 1971, pp. 248-250.
[7]. Paramguru K., P.C. Rath, V.N. Misra, “Trends in Red Mud Utilisation,” Mineral Processing and Extractive Metallurgy Review: 26: pp.1-29, 2005.
[8]. Nimje M. T., R. J. Sharma, G. S. Sengar, “Conversion of Aluminium Industrial wastes (Fly- ash, red mud) into glassceramic products,” ENVICON 2007, pp.41-44, 132-135.
[9]. Satpathy Alok et al., “Red mud: A Potential Coating Material,” ENVICON 2007, pp.139-141.
[10]. Fofana Mohamad, et al., “Treatment of Red Mud from Alumina Production by High Intensity Magnetic Separation,” Magnetic and Electrical Separation. 1995. Vol. 6, pp. 243-251.
[11]. Erça Erol and Reat Apak, “Furnace smelting and extractive metallurgy of red mud: Recovery of TiO , Al O 2 2 3 and pig iron”, Journal of Chemical Technology & Biotechnology, 26 Mar 1997. Vol.70 No.3, pp. 241 - 246.
[12]. Mishra, B., A. Staley, D. Kirkpatrick, “Recovery of Value-added Products from Red Mud,” Minerals & Metallurgical Processing. 2002. Vol. 19, No. 2, pp. 87-94.
[13]. Courtney R., Timpson J.P., Grennan E., “Growth of Trifolium pratense in Red Mud Amended With Process Vol. No. pp. Sand, Gypsum and Thermally Dried Sewage Sludge,” International Journal of Surface Mining, Reclamation and Environment, Vol. 17, No.4, December 2003 , pp. 227-233(7).
[14]. Varnanas S.P., D. Boufounas, & D. Fafoutis, Proceedings of the 9 International Conference on Environmental Science and Technology, Rhodes island, Greece, 1-3 Sept. 2005.
[15]. M. Paradis, J. Duchesne, A. Lamontagne, and D. Isabel, “Using Red Mud Bauxite for the Neutralization of Acid Mine Tailings: a Column Leaching test“, Canadian Geotechnical Journal Vol. 43, No.11, pp.1167–1179 (2006).
[16]. S. Vlahos, K.J. Summers, D.T. Bell and R.J. Gilkes, “Reducing Phosphorus Leaching from Sandy Soils with Red Mud Bauxite Processing Residues,” Australian Journal of Soil Research Vol.27, No.4, pp. 651-662.
[17]. Yee Soong, et al., CO Sequestration Via 2 Brine/bauxite Residue Mixture, National Energy Technology Laboratory, U.S. Department of Energy, Pittsburgh, PA 15236-0940,
[18]. Summers R. N., Rivers M.R. and Clarke, M. F. , ”The use of Bauxite Residue to Control Diffuse Phosphorous Pollution in Western Australia- A win –win win outcome”, th Proceedings of the 6 International Alumna Quality Workshop 2002.
[19]. Chunmei Shi, Jianhang Xu, Eric Beckman, Robert Enick, ”Carbon Dioxide Sequestration via ph Reduction of Red Mud using Liquid Co ”, University of Pittsburgh, 2 pp.703-707
[20]. Claudia Brunori, Carlo Cremisini, Paolo Massanisso, Valentina Pinto, Leonardo Torricelli, “Reuse of a Treated Red Mud : Studies on Environmental Compatibility,” Journal of Hazardous Materials B117, pp.55–63 (2005).
[21]. D.J. Cooling, ”Improving the sustainability of Residue Management Practices- Alcoa World Alumina Australia”, Perth, Australia, pp.3-16, Paste (2007).
[22]. G. Mussels, G. Sparkling, J. Summers, “Bioremediation of Bauxite Residue in Western Australia –An Initial Feasibility Study,” Alcoa of Australia Report No. 26, ISSN 1320-4807, August (1993).
[23]. Hanahan Colleen, McConchie David, M. Pohl John, Creelman Robert, Clark, Malcolm, Stocksiek Curt, ”Chemistry of Seawater Neutralization of Bauxite Refinery Residues (Red Mud)”, Environmental Engineering Science, ISSN 1092-8758, 124-138, (2004).
[24]. Jones Graham B, Joshi Gargi, Clark Malcolm, McConchie David M, ”Carbon capture and the aluminium industry: preliminary studies”, Southern Cross University , (2006).
[25]. Laszlo Kotai, Istvan E. Sajo, Istvan Gacs, Katalin Papp, Andras Bar tha, Gyorgy Banvolgyi “An Environmentally Friendly Method for Removing Sodium in Red Mud,” Chemistry letters, 35 (11), (2006).
[26]. Sameer Khaitan, David A. Dzombak and Gregory V. Lowry, “Mechanisms of Neutralization of Bauxite Residue by Carbon Dioxide,” Journal of Environmental Engineering, (2009).
[27]. Report prepared by RRL, Bhubaneswar, Treatment of red mud for its complete utilization as soil conditioner/ fertilizer, (1995).
[28]. Sara J. Palmer, Ray L. Frost, “Characterisation of Bauxite and Seawater Neutralized Bauxite Residue using XRD and Vibrational Spectroscopic Techniques,” Journal of Material Science , Vol. 4, No.1/Jan (2009).
[29]. Virotec, Australia scientists, June 2003, “Dealing with Red Mud- By-product of the Bayer Process for Refining Aluminium,” Materials World, Vol. 11, No. 6, pp.22-24, June (2003).
[30]. Samir Khaitan, David A. Dzombak, Gregory V. Lowry, “Neutralisation of Bauxite Residue with Flyash,” Environmental Engineering Science, Vol. 26 No.2, pp.431-440 February 1, (2009).
[31]. Suchita Rai, K. L. Wasewar, M. J. Chaddha, Biswanath Sen, Jyoti Mukhopadhyay, “Neutralisation of Bauxite Residue for its Safe Disposal,” ETWMT-09, Indo- Italian Conference on Emerging Trends in Waste Management technologies, pp.473-475, Dec3-4, (2009).
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