Gerdau Cosigua steel plant

From Global Energy Monitor


This article is part of the Global Steel Plant Tracker, a project of Global Energy Monitor.

Gerdau Cosigua steel plant (Usina siderúrgica Gerdau Cosigua) is an electric steel plant in Rio de Janeiro, Brazil.[1]


The map below shows the location of the steel plant in the Industrial District of Santa Cruz, Rio de Janeiro, Brazil.

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At the beginning of the 1970's, the government-owned Companhia Siderúrgica da Guanabara (better known by its abbreviated name Cosigua) announced plans to build a steel plant on a piece of land near Sepetiba Bay, west of Rio de Janeiro. In 1971, Brazilian steelmaker Gerdau S.A. formed a joint venture with the German company Thyssen A.G., purchasing development rights to the project and immediately beginning construction of the plant. Phase 2 of the plant's construction was initiated in 1974, raising the plant's raw steel production capacity to 545,000 tons per annum. In 1979, Gerdau purchased Thyssen's share of the project and assumed full control of the Cosigua plant.[2][1]

The plant's raw steel production capacity is currently 1.2 million tons per annum[3], with recent annual output reported at 932 thousand tons.[4] The plant's facilities include a mini-mill equipped with a pair of Demag electric arc furnaces[5][6], a rolling mill, a drawing mill, and a nail and clamp factory. The plant manufactures products for use in the construction industry, including rebar, merchant bars, wire rod, drawn products and nails.[4]

Plant Details

Articles and resources


  1. 1.0 1.1 1.2 "History of Gerdau S.A." Funding Universe. Retrieved 2020-08-04.
  2. "Gerdau: Breve Descrição da Empresa" (PDF). P.U.C. - Rio. Retrieved August 4, 2020.
  3. 3.0 3.1 3.2 "Gerdau anuncia plano bilionário para dobrar Cosígua". Portos e Navios. February 3, 2011.
  4. 4.00 4.01 4.02 4.03 4.04 4.05 4.06 4.07 4.08 4.09 4.10 "SEC FORM 20-F: GERDAU S.A." UNITED STATES SECURITIES AND EXCHANGE COMMISSION. March 14, 2017.
  5. 5.0 5.1 "FORNOS ELÉTRICOS A ARCO NO BRASIL" (PDF). Universidade de São Paulo. Retrieved 2020-09-29.
  6. 6.0 6.1 Cláudio Correa do Nascimento (2008). "Modelamento do Rendimento Metálico em Fornos Elétricos a Arco" (PDF). Universidade Federal Fluminense.
  7. "Anuário Estatístico 2020" (PDF). Instituto Aço Brasil. June 2020.

External resources

External articles

This page uses material from the Wikipedia page Gerdau under the provisions of the Creative Commons Attribution-ShareAlike 3.0 Unported License.