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Ash fusion behavior modification mechanisms of high-calcium coal by coal blending and its ash viscosity predication

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Listed:
  • Li, Fenghai
  • Zhou, Meijie
  • zhao, Wei
  • Liu, Xuefei
  • Yang, Ziqiang
  • Fan, Hongli
  • Han, Guopeng
  • Li, Junguo
  • Xu, Meiling
  • Fang, Yitian

Abstract

In this paper, the ash fusion temperature (AFT) modification of high calcium Huolinhe lignite (HLH) with the addition of high aluminum Datong coal (DTC) and their corresponding mechanisms were investigated by an AFT tester, X-ray diffractometer, Raman spectrometer, and FactSage software. The AFTs of HLH mixtures increased gradually with the increasing DTC mass ratio due to their corresponding decrease in the total basic oxide content of CaO, MgO, Fe2O3, Na2O, and K2O. The formations and content increases of high melting-point minerals (anorthite, cordierite, and mullite), the gradual decrease in the ratios of no bridging-oxide bond/bridging-oxide bond (NBO/BO), and an increase in the R (R = (Q3 + Q2)/(Q1 + Q0)) value resulted in the increases in the AFT and ash viscosity. Considering the variations in the characteristics of AFT and ash viscosity, the 40.0–50.0 % DTC mass ratio might be suitable for HLH entrained-flow bed (EFB) gasification. The combination of AFT measurement and ash viscosity predication using FactSage provided a simple method to determine whether ash characteristics of coal were suitable for EFB gasification.

Suggested Citation

  • Li, Fenghai & Zhou, Meijie & zhao, Wei & Liu, Xuefei & Yang, Ziqiang & Fan, Hongli & Han, Guopeng & Li, Junguo & Xu, Meiling & Fang, Yitian, 2024. "Ash fusion behavior modification mechanisms of high-calcium coal by coal blending and its ash viscosity predication," Energy, Elsevier, vol. 288(C).
    • Handle: RePEc:eee:energy:v:288:y:2024:i:c:s0360544223032231
    DOI: 10.1016/j.energy.2023.129829
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