Integrated design for SO₂ reduction with waste heat recycling during the iron ore sintering process

Abstract

This paper presents an integrated approach for SO₂ reduction and energy conservation by recycling waste gas during the iron ore sintering process. We established a mathematical model for the sintering flue gas temperature (SDG-T) and SO₂ content (SDG-SC), and analysed the influences of the raw materials (carbon and moisture contents) and operation parameters (sinter bed height and speed). Correspondingly, we develop a novel optimisation framework for the design of the sintering process. Using the proposed integrated approach along with a 360 m² sinter from Anshan Iron and Steel Co., Ltd (An Steel) as an example, we have considered the SO₂ captured by the waste heat resources during the sintering process. Finally, we compare our design approach with that of the conventional approach to verify the capability of our proposed approach in capturing SO₂ using recycled waste gas.

Keywords:

• Integrated design
• Flue gas temperature
• SO2 content
• Waste heat
• Sintering process