阙志刚, 吴胜利, 艾仙斌, et al. Research Process on Degradating Activities of Chlorine Sources for Inhibiting Dioxin Formation in Sintering Process[J]. 2019, (2): 18-23.
阙志刚, 吴胜利, 艾仙斌, et al. Research Process on Degradating Activities of Chlorine Sources for Inhibiting Dioxin Formation in Sintering Process[J]. 2019, (2): 18-23. DOI: 10.16056/j.1005-7676.2019.02.006.
How to cost-effectively reduce dioxins emission of iron ore sintering process is a new challenge for iron and steel industry at present. The activity of Cl element is one of the major factors
which determines the formation of dioxins. In this paper
two formation mechanisms of dioxins in the sintering process were firstly discussed. It was concluded that de novo synthesis was the main path. Then
the evolution behaviors of Cl element in sintering bed were analyzed. The formation mechanisms of high activity chlorides such as Cl
2
and HCl were clarified. Moreover
the degradation mechanism of high activity chlorides and the reduction of dioxins emission by alkaline calcium f
luxes in sintering mixture such as quicklime/limestone and the nitrogen-containing retarders such as urea/carbohydrazide
were discussed in detail. In addition
the development directions of inhibiting dioxins formation were proposed. This review provides an effective reference for steel industry to reduce dioxins emission in iron ore sintering process.