Authors: Silva, S N¹; Romão, E C¹; Barbosa, G S¹; da Costa, W B¹; Vernilli, F²; Lopes, J M G²; de Almeida, B V²

Source: Ironmaking & Steelmaking, Volume 39, Number 8, November 2012 , pp. 622-630(9)

Publisher: Maney Publishing

Abstract:

CSN BF no. 2 has only three hot blast stoves. Owing to the operational risks as well as output losses associated with the BF operation with just two hot blast stoves, the revamping time of this equipment becomes a crucial issue, requiring special attention in each phase of the project from planning to execution so as to shorten the time as much as possible. According to this context, the present paper describes in detail the main technologies used in the last revamping of hot blast stoves carried out in February 2007. These technologies included an accelerated cooling down curve, air conditioning system (good working condition) and convection heating system, which in association with an innovative construction methodology, involving movable and multilevel platforms, has allowed the project to be completed from blow to blow in a record time of just 67 days and 10 h, resulting in a reduction of costs around R$3·4m.

Keywords: Hot blast stove; Blast furnace; Refractories

Document Type: Original Article

DOI: http://dx.doi.org/10.1179/1743281212Y.0000000021

Affiliations: 1: Companhia Siderúrgica Nacional (CSN), Rio de Janeiro, Brazil 2: Engineering School of Lorena, EEL/USP, São Paulo, Brazil

Publication date: 2012-11-01

More about this publication?

• Authors wishing to cite fast track papers should give the journal name and the article DOI. This will enable reference linking via CrossRef and allow forward and backward citation tracking systems to associate the fast track citation with the final journal reference.

  This journal features top 10 articles which are freely available. Please click here and click on the 'Top articles' link in the right-hand menu to view the list and start downloading.

• Editorial Board
• Information for Authors
• Subscribe to this Title
• Terms & Conditions
• Online submission site
• Top 10 Articles
• ingentaconnect is not responsible for the content or availability of external websites

Related content

• In this: publication
• By this: publisher
• In this Subject: Materials & Manufacturing ,  Mining & Metallurgy
• By this author: Silva, S N ;  Romão, E C ;  Barbosa, G S ;  da Costa, W B ;  Vernilli, F ;  Lopes, J M G ;  de Almeida, B V

Website © Publishing Technology. Article copyright remains with the publisher, society or author(s) as specified within the article.

• Terms and conditions
• Privacy policy
• Information for advertisers