Ferro Duo GmbH
About
Ferro Duo GmbH, headquartered in Duisburg, Germany, is a circular economy company that transforms industrial by-products, secondary raw materials, and waste streams into valuable resources for the steel, cement, chemical, agricultural, and water treatment sectors. The company processes and markets iron sulfate (used for cement chromate reduction, animal feed supplementation, agricultural fertilizers, water treatment coagulation, and biogas desulfurization), iron chloride (for water treatment and biogas desulfurization), aluminum oxide, iron oxide, and magnesium sulfate. Ferro Duo also repurposes metallurgical slags and industrial ashes for cement and concrete production. On the thermal processing side, the company operates advanced capabilities including sewage sludge pyrolysis with phosphate recovery, cement kiln bypass dust processing, blast furnace gas sludge recovery, oily mill scale and grinding sludge processing, and electric/oxygen steelworks dust treatment. A major strategic initiative is the SCM (Supplementary Cementitious Materials) Industrial Platform under construction in Duisburg — a double-digit-million-euro investment with private equity partner Lafayette Mittelstand Capital, targeting hundreds of thousands of tons of annual capacity for low-carbon cement manufacturing inputs including granulated blast furnace slag (Hüttensand) and calcined clays, with commissioning planned for 2027. Ferro Duo also participates in the EU-funded EURO-TITAN project for decarbonized titanium recovery and the EIT Raw Materials ScaVanger project. With operations in Germany, Italy, Spain, the USA, and China, the company serves global markets across steel, cement, chemical, agricultural, water and wastewater, biogas, and pigment industries.
Key Products
Multi-purpose chemical product used for cement chromate reduction, animal feed supplementation, agricultural fertilizers, water treatment coagulation, and biogas desulfurization.
Chemical product for water treatment coagulation and flocculation processes, and for hydrogen sulfide removal in biogas systems.
Industrial-grade aluminum oxide recovered from secondary materials, used as alternative raw material in cement production.
Recovered iron oxide supplied to the cement industry as alternative raw material and to the steel industry for reuse.
Chemical product derived from secondary processing, used in the fertilizer industry for crop nutrition and soil amendment.
Processed metallurgical slags repurposed as alternative raw materials for cement and concrete production and as fertilizer components.
Industrial ashes processed and supplied as alternative raw materials for the cement and building materials industry.
Thermal pyrolysis process for sewage sludge that recovers phosphate for fertilizer use while reducing waste volumes and producing energy.
Thermal processing of cement kiln bypass dust to recover usable materials and reduce landfill waste in the cement industry.
Recovery and processing of blast furnace gas sludge from steel production to extract iron and carbon values.
Processing of steel mill by-products containing oil and iron for material recovery and circular reuse.
Thermal treatment of EAF and BOF steelworks dust to recover zinc, iron, and other valuable metals.
Chemical processing to extract rare earth elements from industrial residues for strategic material supply.
Processing of red gypsum from titanium dioxide production for reuse in cement and construction applications.
Specialized recycling process for decommissioned wind turbine blades, recovering fiber and resin materials for reuse.
Processed granulated blast furnace slag used as Supplementary Cementitious Material (SCM) in cement and concrete production.
Thermally activated clay materials produced as SCM for low-carbon cement manufacturing.
Processing and recovery of construction and demolition concrete for aggregate and material reuse.
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