Turning Aluminum Industry Red Mud Waste Into Construction Materials and Critical Metals

Every year, aluminum factories produce mountains of toxic red sludge called "red mud" that mostly just sits in giant ponds, costing money to store and posing environmental risks. RemovAL figured out how to crack open that waste and pull out valuable metals like gallium and rare earths, then turn whatever's left into building materials — bricks, cement, even a full demonstration house. Think of it like urban mining: instead of digging up new ore, you mine what factories already threw away. A consortium of 29 partners across 12 countries spent five years scaling these processes from lab to pilot level.

What needed solving

Europe's aluminium industry generates massive volumes of bauxite residue (red mud) that currently sits in storage ponds, creating ongoing costs and environmental liability. At the same time, Europe imports most of its critical raw materials like gallium and rare earth elements, leaving supply chains vulnerable. Companies need economically viable ways to turn this industrial waste into saleable products while recovering strategic metals.

What was built

The project built multiple technological pilot nodes for extracting gallium, rare earth elements, and iron-silicon from bauxite residue and other metallurgical by-products. On the construction side, the team developed new building materials from processed residue and proved them by constructing a full demonstration house — the "Green Red House" — in Aspra Spitia, Greece, made entirely from RemovAL-produced materials.

Who needs this

Who can put this to work

Quick answers

Who built it

This is a heavily industry-driven consortium with 21 out of 29 partners coming from industry (72%), which is unusually high for EU research projects and signals strong commercial intent. The coordinator METLEN ENERGY AND METALS is a major Greek energy and metals company — not a university — meaning the project was led by someone with direct skin in the game. With 9 SMEs, 5 universities, and partners across 12 countries including major aluminium-producing nations, the consortium covers the full value chain from aluminium production through metal recovery to construction materials. This structure suggests the technologies were developed with real industrial constraints in mind, not just laboratory curiosity.

• METLEN ENERGY AND METALS MONOPROSOPI AECoordinator · EL
• INNCEINNMAT SLparticipant · ES
• WAVESTONE LUXEMBOURG SAparticipant · LU
• RIO TINTO ALUMINIUM PECHINEYparticipant · FR
• ALUM SAparticipant · RO
• RHEINISCH-WESTFAELISCHE TECHNISCHE HOCHSCHULE AACHENparticipant · DE
• INTERNATIONAL ALUMINIUM INSTITUTEparticipant · UK
• RESOURCEFULLparticipant · BE
• ETHNICON METSOVION POLYTECHNIONparticipant · EL
• WAVESTONE ADVISORSthirdparty · FR
• ALUMINIUM PECHINEYparticipant · FR
• AUGHINISH ALUMINA LIMITEDparticipant · IE
• EUROPEAN ALUMINIUMparticipant · BE
• ADVANCED MINERALS AND RECYCLING INDUSTRIAL SOLUTIONS IKEparticipant · EL
• UNIVERSITY OF LIMERICKparticipant · IE
• SINTEF ASparticipant · NO
• ZAAK TECHNOLOGIES GMBHparticipant · DE
• MEAB CHEMIE TECHNIK GMBHparticipant · DE
• HEIDELBERG MATERIALS AGparticipant · DE
• ENALOS EREYNA & ANAPTYKSI IDIOTIKIKEFALAIOUCHIKI ETAIREIAparticipant · EL
• ELKEM ASAparticipant · NO
• KATHOLIEKE UNIVERSITEIT LEUVENparticipant · BE
• ITRB LTDparticipant · CY
• NORGES TEKNISK-NATURVITENSKAPELIGE UNIVERSITET NTNUparticipant · NO
• ACCIONA CONSTRUCCION SAparticipant · ES