Arcelor Mittal Katowice Poland
Repair of 2 Hot Blast Stoves

Scope of work:

In July 2014 HeatTeQ received an enquiry for the repair of the stoves #4 of blast furnaces 2 and 3 of the Katowice plant of Arcelor Mittal. The scope of work for this enquiry was based on an inspection of both stoves after they had been cooled down to ambient temperature by the customer. In the enquiry the bidders were requested to propose methods for repair of both stoves.

 

Facts and Figures

Project: Repair of 2 Hot Blast Stoves
Duration: 3 months
Customer: Arcelor Mittal Poland
Partner: Lizmontagens SA
Execution: 2014-2015

Summary

Stoves #4 of blast furnaces 2 and 4 are internal combustion chamber stoves of similar size, equipped with external burners. Stove 4 of BF 2 is a so called high alumina design stove, whilst stove 4 of BF 3 is a so called Silica design stove. The other difference is that Stove 4 of BF 3 is equipped with a so called protection wall to cope with the impact of the mechanical burner; this protection wall is not incorporated in Stove 4 of BF 2.
Arcelor Mittal prepared the Scope of Repair for both stoves based upon an internal inspection of both stoves after cool down to ambient temperature. This scope was subsequently confirmed with certain amendments after an inspection by HeatTeQ and agreement was reached on the repair methods proposed by HeatTeQ.

Heatteq provided the following services and supplies:

  • Engineering of the required modifications
  • Supply of all refractory materials
  • Engineering and supply of all auxiliary equipment required for installation
  • Provision of supervision and labour required for installation
  • Provision of equipment and supervision of heat-up of both stoves


The repairs can be summarized as follows:

  • Repair of cracks in the dome area of both stoves
  • Removal and replacement of 3 layers of checkers on the top of the checker column of both stoves
  • Complete removal and replacement of hot face lining in the burner shaft above the hot blast outlet of stove 2.4
  • Repair of cracks above the hot blast outlet in the combustion chamber lining of stove 3.4
  • Removal and replacement of the hot face lining between the burner inlet and the hot blast outlet of stoves 3.4 and 2.4
  • Complete removal and replacement of the hot blast outlet refractory lining of both stoves