SKF Invests in Anferra to Recycle Hazardous Steel Grinding Sludge Circularly

SKF has announced a strategic investment alongside Stephen Industries and Chalmers Ventures in Swedish startup Anferra AB, whose breakthrough technology converts hazardous steel grinding sludge into ferric chloride for water treatment and hydrogen gas as an energy carrier, delivering a net climate benefit of negative 470 kilograms of carbon dioxide equivalent per tonne of sludge processed compared with conventional incineration or landfill disposal. The investment marks the first initiative from SKF Ventures, SKF's new initiative to accelerate industrial innovations, addressing one of the most persistent waste challenges in the steel and bearing industry where approximately 12 million tonnes of grinding sludge are generated globally each year, classified as hazardous waste with most non-recycled volumes handled through high-cost incineration or environmentally damaging landfill. Ebba Adolfsson, Chief Executive Officer and Co-founder of Anferra, said SKF has been an important partner since the early stages of Anferra's development and that the investment will accelerate the journey toward industrial implementation around the world with the ambition of significantly reducing grinding sludge landfilling while increasing circularity and resource efficiency globally.

 

The Grinding Sludge Problem and Anferra's Chemical Solution

 

Steel grinding sludge is a finely powdered mixture of metal particles, abrasives and contaminated grinding emulsion generated during metal grinding operations, a material whose composition variability makes standardised recycling technically difficult and whose hazardous classification means conventional disposal carries significant regulatory compliance costs and environmental liability for generating companies. The 12 million tonnes produced globally each year represent both a substantial hazardous waste management burden and a significant loss of iron content that could be recovered and reintroduced into industrial supply chains as a secondary raw material if a viable recycling process were available at commercial scale. Anferra's process achieves up to 90 percent iron recovery with significantly lower energy demand than conventional processing, achieving the dual commercial benefit of reducing disposal costs for grinding sludge generators while producing ferric chloride, a widely used chemical agent in wastewater and water treatment, and hydrogen gas as commercially saleable output streams.

The negative 470 kilogram carbon dioxide equivalent per tonne climate benefit is particularly striking because it represents a genuinely net negative outcome, meaning that processing grinding sludge through Anferra's technology removes more greenhouse gas equivalent from the atmosphere through avoided emissions and beneficial by-product production than the processing itself consumes. Mikael Krook, Director of SKF Ventures, said grinding sludge is one of the toughest recycling challenges in the steel and bearing industry and that Anferra's approach represents a smarter way forward, positioning SKF as a first mover in circular recycling innovations and creating new value from waste streams. The potential for the technology to shift grinding sludge from hazardous waste classification toward secondary raw material status aligns with the EU's efforts to harmonise waste regulations and build a stronger market for secondary raw materials, creating a regulatory tailwind that could accelerate commercial adoption as European waste framework revisions progress.

 

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The Investment Consortium and Complementary Expertise

 

The three-investor consortium brings together capabilities across industrial application, deeptech venture scaling and research commercialisation that collectively address the key barriers to translating Anferra's laboratory-proven technology into industrial deployment at commercial scale. SKF contributes industrial application knowledge, waste stream volume from its own grinding operations and decades of experience in sustainability leadership, providing both a first commercial customer and the credibility that enterprise industrial buyers require before adopting new waste processing technologies from startup suppliers. Stephen Industries adds expertise in scaling high-impact deeptech and greentech ventures, providing the commercial development and growth acceleration capabilities that complement SKF's industrial domain knowledge and Anferra's technical innovation.

Chalmers Ventures provides venture building capabilities and connection to the research ecosystem at Chalmers University of Technology in Gothenburg, enabling further technology development and commercialisation support from one of Scandinavia's leading engineering research institutions. The three-party structure reflects a deliberate ecosystem approach to deeptech commercialisation where the startup provides the core technology, the industrial partner provides market access and application credibility and specialist venture builders provide the commercial scaling infrastructure that early-stage startups typically lack. This consortium model reduces the execution risk of commercialising a genuinely novel industrial chemistry process by embedding the startup within relationships that address the primary barriers of technology validation, market access and scaling expertise simultaneously.

 

Circular Economy and SKF's Broader Sustainability Strategy

 

The Anferra investment fits within SKF's broader application of circularity principles across its operations, which include remanufacturing bearings, circular oil use through its RecondOil programme, exploring recycled steel solutions with ultra-low emissions and investigating hydrometallurgical methods to minimise resource loss and accelerate the transition to a net-zero, more circular industrial ecosystem. For a company manufacturing hundreds of millions of bearings annually, the grinding processes that generate sludge represent a significant operational waste stream, making the development of an effective recycling solution both an environmental priority and a potential cost reduction opportunity as hazardous waste disposal costs increase under tightening European waste regulations. The SKF Ventures vehicle established to make the Anferra investment signals a broader strategic commitment to accelerating circular economy innovations that extend beyond SKF's existing operational practices into the development of new circular technologies that can transform persistent industrial waste challenges industry-wide.

The EU's Critical Raw Materials Act and Secondary Raw Materials strategy create a regulatory environment increasingly favourable to technologies that recover industrial metals from waste streams, as European policy progressively strengthens requirements for recycled content and secondary material use in manufacturing while tightening the regulatory framework for hazardous waste landfill and incineration. Anferra's potential to reclassify grinding sludge from hazardous waste to secondary raw material under evolving EU waste regulations would fundamentally change the economics of sludge management for thousands of European metalworking companies, creating a substantial addressable market for the technology beyond the bearing and steel sectors where SKF operates.

 

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Outlook for Industrial Circular Chemistry Startups

 

Whether Anferra can successfully scale its grinding sludge recycling process from its current development stage to industrial implementation requires demonstrating consistent feedstock processing across the compositional variability of sludge from different metal grinding operations, securing offtake agreements for the ferric chloride and hydrogen outputs and developing the operational infrastructure for collecting and processing sludge from geographically dispersed industrial customers. The combination of SKF as a committed first commercial partner, Stephen Industries' scaling expertise and Chalmers Ventures' technology development support provides a more comprehensive commercialisation infrastructure than most industrial chemistry startups access at the equivalent stage, reducing the timeline and execution risk of reaching industrial deployment. Sustained progress toward commercial scale implementation would establish Anferra as a pioneering example of how industrial circular chemistry can transform persistent hazardous waste streams into valuable secondary resources with genuinely negative carbon impact.

 

Source: PRNewswire