|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||9th International Symposium on High Temperature Metallurgical Processing
||Kinetics Study on Limestone Decomposition in Early Converter Slag
||Nan Wang, Haohua Deng, Min Chen, Ming Chen, Ying Wang, Cuihuan Huang
|On-Site Speaker (Planned)
Compared to the conventional lime slagmaking mode, adding limestone directly into converter is considered to be favorable to energy conservation and emission reduction by transferring the decomposition reaction of limestone from the shaft or rotary kiln to the converter. In this paper, the kinetics of limestone decomposing in early converter slag was studied at 1300-1400℃, and the effects of slag temperature and stirring speed introduced to the slag bath were examined. The kinetic results based on shrinking core model analysis showed that the limestone decomposition was a mixed rate control of chemical reaction and heat conduction through the lime layer, which could be promoted at higher slag temperature. The chemical reaction rate constant and effective thermal conductivity were also determined. In addition, smaller limestone particle less than 15 mm and more heat supply to the converter bath are recommended to accelerate the limestone decomposition in early converter slag.