SPL‐CYCLE: Closing the loop of the Spent Pot‐line (SPL) in Al smelting process
Research Project , 2018 – 2021

Each ton of aluminium produced in Al smelters generates approx. 20kg of hazardous waste, which is a mix of the carbon lining and the refractory lining, known as "spent pot lining" (SPL). Worldwide aluminium production in 2016 was approximately 59 million tonnes, corresponding to the generation of 1.18 million of tonnes of SPL. The current practice of the waste management of hazardous SPL is landfilling or incineration, which costs aluminum producers on average 200 EUR/tonne (240 million EUR annually on a global level).

The project presents a novel zero waste technology for the recycling of spent pot lining (SPL) from aluminum production, consisting of four main separation on processes (preparation, extraction, flotation, and refining) in order to achieve the quality of products needed by end‐users. The final products will be used either in aluminum production (recovered carbon and fluoride slats) or will be sold to the refractory industry or the construction industry (recycled refractory residues). A pilot demonstration of the operability of the system will be constructed at the company in Slovenia, with the aim of optimizing and valorizing the technology. Additionally a reliable business model will be developed enabling the next steps to commercialization.

The innovative technology itself and the new sustainable approach will therefore represent a new circular economy business model for aluminum producers with the complete elimination of waste deposition and incineration costs.

Participants

Burcak Ebin (contact)

Forskare vid Chalmers, Chemistry and Chemical Engineering, Energy and Material, Nuclear Chemistry

Martina Petranikova

Forskarassistent vid Chalmers, Chemistry and Chemical Engineering, Energy and Material, Nuclear Chemistry

Collaborations

Aluminum of Greece

Greece

Flemish Institute for Technological Research

Mol, Belgium

National Technical University of Athens (NTUA)

Athens, Greece

Scientific Research Center Bistra Ptuj

Slovenia

Slovenian National Building and Civil Engineering Institute (ZAG)

Ljubljana, Slovenia

University of Ljubljana

Ljubljana, Slovenia

UVR-FIA GmbH

Freiberg, Germany

Funding

EIT RawMaterials

Funding Chalmers participation during 2018–2021

EIT RawMaterials

Funding Chalmers participation during 2018–2021

Related Areas of Advance and Infrastructure

Sustainable development

Driving Forces

Production

Areas of Advance

More information

Latest update

2018-11-12