Circular Economy


CSN is constantly looking for innovations to face the challenges that impact its various sectors of activity. Among these movements, the search for strengthening the Circular Economy stands out. It presents itself as the alternative to change the very logic of the productive organization, towards the reuse and revaluation of the materials on which the supply of goods and services is supported. “Extracting, transforming, consuming and discarding” has been the path taken by contemporary production processes so far. The Circular Economy consists of a development cycle that preserves and enhances natural capital, optimizes resource production and minimizes systemic risks. In addition to an opportunity for innovation, the occasion will provide knowledge and promote the company's initiatives to reduce costs, expand sustainability and, with it, new market opportunities.

Production model based on circular economy


The CSN Group applies the concept of circular economy in all sectors and businesses in which it operates. Focused on generating value from the maximum use of natural resources, the company evaluates solutions and implements technologies for the reuse of materials in its own production processes or reuse in other production chains. 
With an integrated and verticalized production process in the steel chain, CSN generates different types of co-products that, instead of being destined to landfills, are marketed and reinserted in different types of industries – fine chemistry, pharmaceutical, agribusiness, among other sectors. Integrating environmental responsibility to the search for value generation in all its businesses, CSN created the Special Sales area, , which guarantees the proper destination for each type of co-product, with sales in Brazil and abroad. The trading unit is divided into six different segments:
  1. Carbochemicals: Generation of chemicals such as ammonia, tar, BTX and sulfur.
  2. Co-products and residues: Carepa, zinc and galvalume lees, oxides and other co-products generated.
  3. Disposed and unusable: Sale of unused materials, scrap paper, motors, pumps, other scraps without internal application and obsolete warehouse materials.
  4. Assets: Sale of demobilized assets – trucks, cars and equipment.
  5. Opportunity steel: Sale via auction of opportunity items such as coils, rolls, plates and pipes.
  6. Business development: Promotes new opportunities of value to co-products for the entire CSN Group and partnerships with universities and companies.
In the last 5 years, CSN's sales of special sales items has tripled only with good management, a well-structured business model for segregation and search for partners in the market.
The total volume of waste generation was 9% lower compared to 2020

96% of non-hazardous waste is reused, reprocessed or marketed as an insum for other production chains

100% of the blast blast slag generated in upv is forwarded to the cement production of CSN Cimentos

In SWT (Germany), 99% of the slag generated was allocated to external recycling

Waste co-processing reduces the use of fossil fuels in clinker ovens by up to 20% per year

UPV carried out the recovery and reuse of 593,400 tons of metal scraps during its 2021 production cycle

Circula +


The CSN Group uses its own sales platform (via competition) and has currently worked on the creation of a Marketplace (Circula+), together with CSN Inova, because it believes in a sales solution that adds value to waste, with a transparent sales environment and aligned with the Company's ESG culture – encouraging the economy of waste pickers,  and raising the levels of recycling to expressive levels. With Circula+, the Company envisions the service to other companies, besides CSN, focusing on meeting 100% of the needs of the industry.

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