Investigation on variation mechanisms of ash fusion and viscosity of high calcium-iron coal by coal blending

Zhao, Wei; Ma, Mingjie; Zhao, Chaoyue; Wang, Yong; Yang, Ziqiang; Zhang, Xujing; Fang, Yitian

doi:10.1016/j.fuel.2022.126663

Cited by 5 publications

(1 citation statement)

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“…Wang et al [29] explored the effects of additive type and blending ratio on the fusion characteristic and the mineral phase transformation of iron-rich Zhundong coal and gave the best suggestions for adding proportions. However, despite extensive research on the potential and efficacy of various additives in regulating the fusion characteristics of coal ash, [30] there is a notable gap in understanding the behavior of iron-based minerals found in coal, such as hematite, magnetite, and wurstite. The complex composition of ash during the gasification process and its interaction with iron-based minerals, along with the detailed reactions and their influence on the ash melting mechanism, require further exploration.…”

Section: Introductionmentioning

confidence: 99%

Regulation Mechanism of Ash Fusion of Iron‐Rich Coal in Xinjiang with Different Additives

Lv,

Zhang,

Wang

et al. 2024

ChemistrySelect

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To realize the high‐efficiency utilization of iron‐rich coal (ZC), it is necessary to conduct in‐depth research on its ash fusion characteristics and regulation mechanism. In this paper, the fusion temperature test of ZC coal ash was first carried out in a weak reducing atmosphere, and diatomite (GZT) and Naomaohu high‐calcium coal (NMH) were selected as additives. The results show that the four characteristic temperatures of ZC coal ash are all low under weak reducing conditions. The addition of NMH ash lowered the fusion temperature of ZC coal ash, while the GZT ash increased the fusion temperature to varying degrees. When the addition ratio of NMH ash is less than 40 %, the effect of increasing the difference between the deformation temperature and flow temperature of ZC coal ash is still positive. The addition of NMH ash made the slag system generate a high content of calcium‐magnesium feldspar and calcium‐iron feldspar, decreasing the fusion temperature of the blended coal ash. The addition of GZT ash increased the content of SiO2 in the slag system and promoted the increase of the iron‐pyroxene content, and the formation of the iron‐aluminum pyroxene and cordierite mineral phases, thereby increasing the coal ash fusion temperature.

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Section: Introductionmentioning

confidence: 99%