• Waste Heat Recovery for EAF—Innovative Concepts and Industrial Implementation

31 OCAK 2018
Waste Heat Recovery for EAF—Innovative Concepts and Industrial Implementation
The development of a waste heat recovery plant requires extensive knowledge as well as long experience of the entire plant. Primetals provides waste heat recovery solutions for EAFs, some of which are presented in this article. A waste heat recovery plant is introduced, which was installed in Italy. Waste heat is used to produce steam for two pickling lines, which are a large distance from the EAF. The substitution of the existing gas-fired boilers led to a decisive reduction of operating costs of the steel plant. A heat recovery plant was installed at a steel plant in Sweden, where hot water at high pressure is produced and utilized for the local district heating system. The implementation of waste heat recovery systems for EAFs will be presented in detail, and operational results achieved will be discussed.

In recent years, waste heat recovery in the steel industry has attracted more and more attention. Environmental regulations, public funding, as well as required revamps of old dedusting systems lead steel plant operators to discuss and to evaluate possibilities of recovering waste heat.

The development of a waste heat recovery plant requires extensive knowledge as well as long experience of the entire plant, including water-steam cycle as well as the electric arc furnace (EAF) process and dedusting system. Innovative waste heat recovery solutions are introduced and discussed in this article.

Another challenge for waste heat recovery at EAF plants is to identify a possible utilization for the recovered energy. Thus, possible applications for a heat consumer inside or outside the steel plant are discussed.

Industrial implementations of waste heat recovery plants are presented to demonstrate economic and reliable utilization of EAF waste heat for different applications.

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