Exploration of a new path to reduce air pollutant emissions in the sinter plant of steelworks

Abstract

Tremendous air pollutant emissions have become an obstacle to curbing the green development of the steel industry. How to minimize the air pollutant emissions? In this study, the gas flow network model of the sinter plant was first established by using the dynamic material flow analysis method. Moreover, based on the circulation theory, the waste gas recycling of the sinter plant was constructed and the gas flow network model was optimized. Therefore, the waste gas and air pollutant emissions can be reduced. The results showed that the actual air consumption in the sinter plant was 79.40% higher than the theoretical value, with a serious waste of air resources. After waste gas recycling, the waste gas emissions from the production of per ton sinter were reduced by 49.54%, and the emissions of SO2, NOX, and soot were reduced by 4.5 g, 9.1 g, and 1.8 g, respectively.