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Your partner for the steel industry on a global level

FERRO DUO GmbH is a reliable and experienced partner of the steel industry. We take care of the environmentally friendly recycling of all waste and by-products from the processes. Find out more about our recycling of by-products in the steel industry below and feel free to contact us if you have any questions about cooperation.

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Our cooperation with steel companies

FERRO DUO GmbH works successfully and efficiently with various steel companies. We process slag in particular - but also other by-products and waste products.

Our cooperation with the steel industry works as follows:

  • We pick up your industrial waste 24/7, 365 days a year.

  • We provide the logistics.

  • We manage your plants.

  • We operate a plant on the partners' sites – always depending on the infrastructure, specialist companies and permits.


Slag is often inevitably produced as a by-product during steel production. Depending on the production process, slag is divided into blast furnace slag and steelworks slag. The liquid blast furnace slag is predominantly cooled in the steelworks by quenching with water, which produces the glassy, fine-grained granulated blast furnace slag. Our technologies ensure that the high-quality blast furnace slag can be transformed into ground blast furnace slag, which in turn can be used in the cement industry. The liquid steel mill slags are poured into so-called beds for cooling. After cooling, they undergo further processing steps such as crushing, screening or grinding. Not only slags, but also other by-products and waste such as iron sulphate, iron chlorides, steel mill dusts, mill scale or ammonium sulphate are  handled by us and processed for recycling in other industries.

Recycling of by- and waste products from the steel industry

We remove and prepare the following products:

  • Blast Furnace Slag / Air-Cooled Blast Furnace Slag

  • Granulated Blast Furnace Slag / Granulated Blast Furnace Slag

  • Grinded blast furnace slag / Ground Granulated Blast Furnace Slag

  • Pig Iron Desulphurization Slag / Desulphurization Slag

  • LD Slag / Converter Slag / Basic Oxygen Furnace Slag

  • Electric Arc Furnace Slag (EAF slag)

  • Secondary Metallurgical Slags (Ladle Slag)

  • Blast furnace gas slurry

  • Ferrous sulfate Copperas, green salt

  • Ferric chlorides Picker Liqueur, Ferros Chloride

  • Steel mill dust OX dusts

  • Mill scale oily (mill scale sludge) and non-oily

  • Iron oxide

  • Ammonium sulphate


Are you interested in working with our company?
We also recycle the by- and waste products of your steel company.