Effect of Al<sub>2</sub>O<sub>3</sub>/CaO on the melting and mineral transformation of Ningdong coal ash

Feng Wang; Min Yao; Haoyong Kan; Jianping Kuang; Ping Li; Jiashuo Zhang; Yixin Zhang

doi:10.1016/j.cjche.2020.04.001

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Effect of Al₂O₃/CaO on the melting and mineral transformation of Ningdong coal ash

Energy, Resources and Environmental Technology | Updated：2026-01-06

- Effect of Al₂O₃/CaO on the melting and mineral transformation of Ningdong coal ash
- Chinese Journal of Chemical Engineering Vol. 28, Issue 12, Pages: 3110-3116(2020)
- Affiliations：
  
  1. State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, College of Chemistry and Chemical Engineering, Ningxia University,Yinchuan,China,750021
  2. Ningxia Shenyao Technology Co. Ltd.,Yinchuan,China,750000
  3. China University of Mining and Technology,Xuzhou,China,221116
- Author bio：
- Funds：
- DOI：10.1016/j.cjche.2020.04.001
  CLC：
- Published：2020
- Accepted：
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DOI：

O DOI： 10.1016/j.cjche.2020.04.001.

摘要

Abstract

Coal ash melting characteristics has a direct impact on the smooth operation of entrained gasifier. Mineral conversion of coal ash is very significant to be investigated

because the mineral can affect the melting temperature and viscosity under high temperature conditions. In this paper

the effects of different Al

/CaO on the mineral conversion

melting temperature and viscosity of Ningdong coal ash are studied by the combination of experiment and simulation. The trend of melting temperature decreases firstly and rises with increasing Al

/CaO. The ash melting point reached to the lowest when the ratio is 1.23. XRD and Factsage software are used to analyze crystallization behavior of samples. The results show that the content of anorthite

albite and corundum increases and subsequently decreases

while the content of mullite decreases firstly and then rises with increasing Al

/CaO. High content with CaO can contribute to form albite and anorthite of low-melting. Besides

high content with Al

can tend to produce mullite of high-melting. The results of experimental a

nd simulation are basically the same

which lays a foundation for the melting characteristics of Ningdong coal ash and can provide technical support for the smooth operation of the entrained-gasifier.

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Effect of Al2O3/CaO on the melting and mineral transformation of Ningdong coal ash

DOI：10.1016/j.cjche.2020.04.001

摘要

Abstract

关键词

Keywords

references

Effect of Al₂O₃/CaO on the melting and mineral transformation of Ningdong coal ash