DEMO CASE 1

Upcycling of waste from the Lithium extraction & refinery

OBJECTIVE

The primary objective of DC 1 is to investigate the upcycling of lithium extraction residues, specifically aluminosilicate residues (LAR), for several construction and ceramics applications (such as concrete, road layers, binder systems, paste backfill, and ceramic tiles). ICARUS aims to improve upcycling technologies and processes for waste valorisation and to define new formulations that meet the technical and environmental requirements of the final applications.

Location

Spain & Germany

Sectors involved

Lithium mining and extraction, ceramics industry, construction materials sector

Key partners

Lithium Iberia, K-UTEC, Univ. Lorraine, Acciona Construcción, Keraben Group, CSIC-ICV, CARTIF

Benefits

Economic

Lower waste disposal costs and creation of value-added ceramic and construction products, along with potential savings from the partial replacement of primary raw materials..

Technological

Proven sintering process tailored to LAR with comparable performance to traditional materials.

Environmental

Decreased mining waste and carbon footprint from material extraction and transport, research into alternative binder systems.

Frequently Asked Questions

The lithium residue comes from a site in Spain, and it is processed and tested in Spain and Germany by a network of industrial and research partners.
LAR (Lithium Aluminosilicate Residue) is a by-product from lithium extraction. Instead of being discarded, ICARUS is exploring how it can be turned into useful materials for construction and ceramics.
By reusing mining waste, the project reduces the need for quarrying natural materials, cuts CO₂ emissions from transport, and prevents landfill disposal.
The ceramics and construction sectors can reduce costs and environmental impact, while mining regions benefit from new job opportunities and more sustainable local development.

DEMO CASE 2

Upcycling of industrial and urban cellulosic waste

OBJECTIVE

Demo Case 2 will develop and validate an efficient system to recover cellulose from urban wastewater (WWTP) and absorbent hygiene products (AHP) collected separately. Both materials will be recycled and upcycled into new products for the construction sector through eco-design and sustainable processing. Additional valorisation routes will be explored in sectors such as the chemical industry. The process will be supported by a digital platform powered by artificial intelligence (AI) to enable automatic optimisation of operational parameters, ensuring consistent quality of the recovered secondary raw materials (SRMs).

Location

Spain & Italy

Sectors involved

Wastewater Treatment sector, chemical industry, technological sector, construction materials sector

Key partners

i-FORIA, Acciona Agua, Acciona Construcción, CARTIF, & SMC

Benefits

Economic

Lower sludge management costs and access to a new market for bio-based products.

Technological

Development of lightweight composite materials with adaptable mechanical properties.

Environmental

Reduced volume of urban waste including sewage sludge and lower emissions linked to its treatment; decrease of AHP waste disposal in landfills and incinerators.

Frequently Asked Questions

Cellulosic fibres could be used as a reinforcing component in binder materials. More specifically, these recovered fibres from WWTPs and AHP products could be added, for example, to concrete mixtures applied particularly in slabs and pavements. These concrete structures have a large surface area compared to their volume and are prone to cracking due to drying shrinkage, especially in hot and windy climates. The use of cellulose fibres would help reduce crack width or even prevent their formation.
Toilet paper is the main source of cellulose in WWTPs, and cellulose content can vary between 20% and 30% of the influent’s chemical oxygen demand (COD). Thus, the recovery of cellulose will not only support the promotion of circular economy strategies but also help reduce the influent organic matter load to WWTP, and consequently, the overall energy consumption of the treatment .
The raw materials used by leading manufacturers of absorbent personal hygiene products (AHPs) are of the highest quality, given the sensitive nature of their intended use. Preserving not only their quality but also the exceptional chemical-physical properties that make these materials so carefully selected is therefore of critical importance. i-Foria’s proprietary treatment process for recycling post-consumer AHPs fully addresses this challenge by retaining the original performance characteristics of the materials. The result is the production of high-quality cellulose, suitable for reuse in a wide range of industrial applications.
The recovery of cellulosic sludge will take place at the Sant Celoni Wastewater Treatment Plant (Barcelona, Spain), operated by ACCIONA, and it will be recycled at i-Foria’s R&D center located within SMC Group’s facilities in Spresiano (Italy), where AHP products will also be processed.

DEMO CASE 3

Steelmaking slag upgrading via carbon capture routes into added value materials

OBJECTIVE

Demo Case 3 explores the use of steelmaking slags as raw materials for producing sustainable Precipitated Calcium Carbonate (PCC). The resulting co-products will be assessed for applications in the construction, ceramic, and steel industries. The process will be adapted to align with the ICARUS lifecycle, aiming to balance process efficiency, products’ quality, and CO₂ capture, while ensuring economic viability. Digital predictive models will support process optimisation and lay the foundation for future upscaling.

Location

Spain

Sectors involved

Steel industry, Calcium carbonate producers, civil construction sector and ceramics producers.

Key partners

ArcelorMittal Global R&D, Cales de Llierca, ArcelorMittal España, ACCIONA CONSTRUCCION, ICV-CSIC, Keraben Group

Benefits

Economic

To increase the market value of steelmaking slags, not only producing a set of added value products, but also generating CO2 credits along the process. In addition, reduces the dependence on the natural resource’s extraction.

Technological

To develop a new process which integrates, CO₂ capture processes within existing industrial processes.

Environmental

To achieve zero landfilling of steelmaking slags, while reducing the extraction of natural raw materials. All, achieved with an innovative carbon negative process, lowering environmental footprint of the products.

Frequently Asked Questions

Unlike conventional slag valorisation, producing PCC directly from slag adds high-value functionality. It enables CO₂ mineralization, turning emissions into a marketable product. Most slag reuse focuses on bulk applications like cement; PCC production taps into fine chemical markets. Residual fractions are not discarded but upcycled into construction materials, closing multiple loops. This dual valorisation is unique among industrial waste strategies. It shifts slag from low-grade material to a source of premium and sustainable materials
Producing PCC from steel slag fulfils two environmental objectives: first, the upcycling and valorisation of the slag in the production of an added value product. Otherwise, the slag will be mostly landfilled or partially utilized in no-profitable applications. Secondly, the process is carbon negative, by means of the sequestration of CO2 from industrial streams in the PCC structure, thus preventing its release into the atmosphere.

Additionally, to ensure a circular approach, all the co-products generated along the process can be incorporated as a raw material in various industries—such as ceramics, construction, and steelmaking—promoting industrial symbiosis, boosting economy and reducing the need for virgin raw materials.
Stabilised steel slag can be processed into pigments or additives for ceramic tiles, offering colouration effects and technical properties similar to conventional materials. All materials will be tested to meet strict safety and performance standards. The slag is chemically stabilised before use to ensure it is non-hazardous and suitable for ceramic applications.

All, contributes to reduce the need for natural raw materials like clays or metal oxides, lowering environmental impact and supporting a more circular production model in the ceramics industry.
Steelmaking slags is a historical alternative material for the construction sector, although in minor proportions. Several problematics , such as volumetric expansion and leaching, prevent its major acceptance and use in the sector as aggregates or sand. After the process of DC3, the stabilized slags is expected to lack of this drawbacks, becoming a sustainable and competitive material in this applications, unlocking the negative perspective of the slags and other residues.