Influence of Iron Content on Ash-melting Characteristics and Mineral Evolution During Combustion of Zhundong High-iron Coal

LIU Bojianzhi; JIN Jing; HE Xiang

doi:10.19805/j.cnki.jcspe.2025.230760

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Influence of Iron Content on Ash-melting Characteristics and Mineral Evolution During Combustion of Zhundong High-iron Coal

更新时间：2026-01-21

- Influence of Iron Content on Ash-melting Characteristics and Mineral Evolution During Combustion of Zhundong High-iron Coal
- Chinese Journal of Power Engineering Vol. 45, Issue 2, Pages: 198-204(2025)
- 作者机构：
  
  1. 上海理工大学能源与动力工程学院,上海,200093
  2. 上海市动力工程多相流与传热重点实验室,上海,200093
  3. 上海发电设备成套设计研究院有限责任公司,上海,200240
- 作者简介：
- 基金信息：
- DOI：10.19805/j.cnki.jcspe.2025.230760
  CLC： TQ534
- Published Online：15 February 2025，
  
  Published：2025
- 稿件说明：
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刘薄鉴治,金晶,何翔. 铁含量对准东高铁煤燃烧过程中灰熔融特性与矿物演变的影响动力工程学报, 2025, 45(2): 198-204 https://doi.

org/10.19805/j.cnki.jcspe.2025.230760
刘薄鉴治,金晶,何翔. 铁含量对准东高铁煤燃烧过程中灰熔融特性与矿物演变的影响动力工程学报, 2025, 45(2): 198-204 https://doi. DOI： 10.19805/j.cnki.jcspe.2025.230760.

org/10.19805/j.cnki.jcspe.2025.230760 DOI：

摘要

选择准东高铁煤将军庙煤作为研究对象

通过改变添加剂Fe

含量

研究铁含量对准东高铁煤灰熔融特性的影响

进一步分析准东高铁煤煤灰中矿物的演变规律

并计算分析煤灰的黏度。结果表明:在将军庙原煤煤灰中

低熔点矿物钙镁黄长石的生成是其灰熔融温度较低的主要原因;当将军庙煤中Fe

质量分数为8%时

煤灰的变形温度(DT)、软化温度(ST)均降至最低

主要原因是生成了大量铁橄榄石;将军庙煤中Fe

质量分数大于8%时

煤灰矿物中出现高熔点矿物的莫来石

使其DT和ST均上升;温度超过1 000 ℃后

随着温度的继续升高

煤灰的黏度逐渐减小;Fe

质量分数为8% 的煤灰黏度最先进入煤灰的强沉积区间

沾污结渣情况最严重;温度为1 300 ℃时

不同Fe

质量分数下煤灰的黏度基本相同。

Abstract

The Jiangjunmiao coal of Zhundong high-iron coal was selected as the research object

and the effect of iron content on the ash-melting characteristics of Zhundong high-iron coal ash was investigated by changing the content of Fe

. Moreover

the evolution of minerals in the coal ash of Zhundong high-iron coal was analyzed

and the coal ash viscosity was calculated and analyzed. Results show that the formation of low melting point mineral calcium-magnesium yellow feldspar is the

main reason for its lower ash melting temperature. When the Fe

content in the Jiangjunmiao coal is 8%

the ash deformation temperature (DT) and softening temperature (ST) decrease to the lowest

which is mainly due to the generation of a large amount of iron olivine. When the Fe

content in Jiangjunmiao coal is higher than 8%

mullite

a high melting point mineral

appears in the ash minerals

causing both DT and ST of coal ash to increase. After the temperature exceeds 1 000 ℃

the viscosity of the coal ash gradually decreases with the increase of temperature. The viscosity of coal ash with 8% Fe

content is the first to enter the strong deposition zone of coal ash with the most serious staining and slagging. At temperature of 1 300 ℃

the viscosity of coal ash with different Fe

contents is basically the same.

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