Journal of Sustainable Metallurgy

, Volume 3, Issue 3, pp 551–560 | Cite as

Mud2Metal: Lessons Learned on the Path for Complete Utilization of Bauxite Residue Through Industrial Symbiosis

  • Efthymios Balomenos
  • Panagiotis Davris
  • Yiannis Pontikes
  • Dimitrios Panias
Research Article


A new concept for a holistic exploitation of the bauxite residue (BR) is presented, where a multitude of niche and bulk application products are produced, leading to a near zero-waste, financially viable, and environmentally benign process. Based on the combination of recent research results, the “Mud2Metal” conceptual flow sheet was developed in order to produce added value products rationalizing BR sustainable valorization. The Mud2Metal flow sheet is analyzed technologically, environmentally, and economically, addressing the challenges and the effects of each processing step, for the case of the Greek BR. The Mud2Metal flow sheet is focused on the selective removal of rare earth elements, the subsequent production of pig iron for the iron and steel industry, and the valorization of the residual slag’s engineered mineral matrix into a variety of building materials. Based on further technological innovation and flow sheet integration/optimization, the plant operation could become economically profitable for the alumina industry, environmentally benign, and socially acceptable; in one word: sustainable.


Bauxite residue Red mud Zero-waste REE Scandium Slag valorization Iron 



The research leading to these results has received funding from the European Community’s Seventh Framework Programme ([FP7/2007‐2013]) under Grant Agreements No. 309373 (EURARE and No. 249710 (ENEXAL This publication reflects only the authors’ view, exempting the Community from any liability.


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Copyright information

© The Minerals, Metals & Materials Society (TMS) 2016

Authors and Affiliations

  1. 1.Aluminium of GreeceViotiaGreece
  2. 2.School of Mining and Metallurgical EngineeringNTUAZografouGreece
  3. 3.Department of Materials EngineeringKU LeuvenLeuvenBelgium

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