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Kinetic Study on Decomposition and Dissolution of Limestone in Converter Slag

  • Haohua Deng
  • Nan Wang
  • Min ChenEmail author
  • Guangzong Zhang
Conference paper
Part of the The Minerals, Metals & Materials Series book series (MMMS)

Abstract

The kinetic behaviour of limestone decomposition and dissolution in converter slag at temperatures in the range of 1300–1400 °C was studied. The influence of decomposition reaction on the lime dissolution rate was also investigated. The rate-limiting steps of decomposition and dissolution of limestone in converter slag were determined on the basis of shrinking core hypothesis. The experimental results indicate that a mixed controlling mechanism of chemical reaction and heat conduction through the produced lime layer should be considered for the limestone decomposition in converter slag. The rate-controlling mechanisms of the dissolution of produced lime differ during the various sub-processes. In addition, examination of the lime microstructure at higher slag temperature revealed that cracks are formed in decomposed lime layer; lime dissolution is promoted by molten slag and penetrates through these cracks.

Keywords

Kinetic behaviour Limestone decomposition Dissolution rate Converter slag 

Notes

Acknowledgments

The authors gratefully acknowledge the National Natural Science Foundation of China (51574065, 51574066, 51774072 and 51774073) and the National Key R&D Program of China (No. 2017YFB0304201, 2017YFB0304203, 2016YFB0300602) which have made this research possible.

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Copyright information

© The Minerals, Metals & Materials Society 2019

Authors and Affiliations

  • Haohua Deng
    • 1
  • Nan Wang
    • 1
  • Min Chen
    • 1
    Email author
  • Guangzong Zhang
    • 1
  1. 1.School of MetallurgyNortheastern UniversityShenyangChina

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