8th International Congress on Science and Technology of Ironmaking - ICSTI 2018

The energy recovery system for FINEX® has been developed and adopted with commercial scale to the No.3 FINEX® plant at POSCO’s Pohang Works. The energy recovery system is composed of heat recovery steam generator, dry de-dusting, and expansion turbine–driven power generator, which are optimally configured with adjusting the balance between system efficiency and the process restrictions. For the reliable design, the each components has been selected among the best available technologies, and customized to the FINEX® process conditions through the pilot scale test. The commercial operation of energy recovery system commenced from July 2017, and demonstrated the satisfactory performance as aimed. At present, the energy recovery system is being stably and reliably operated, and contributes to the cost and energy savings at No.3 FINEX® plant. This paper presents the development progress and operating status of energy recovery system tailored to the current FINEX® plant, and evaluates the change and enhancement in FINEX® process. Also, the further optimization is discussed for the proposal of more efficient and economical adoption to the next FINEX® plant.