煤炭转化2025，Vol.48Issue(1)：101-113,13.DOI:10.19726/j.cnki.ebcc.202501010
工业固废制备复合助熔剂用于调控高灰熔点煤灰的熔融特性研究
Application of complex flux from industrial solid waste to adjust ash fusibilty of high ash melting point coal ash
摘要
Abstract
Fusibilty of coal ash is an important parameter for coal gasification.Addition of flux is widely used to lower the high ash melting point coal ash fusion temperatures.The complex flux can significantly reduce the dosage of flux,improving the overall efficiency of coal gasification for the synergistic effect between different components.In this study,the impact of complex flux agents pre-pared from industrial solid waste,steel slag(GZ)and red mud(CN),the influence of complex flux on ash fusibility of high ash melting point Lu'an coal(LA)ash was investigated,and the mineral trans-formation was analyzed by experiment and calculation.The results show that addition amount of 2%-8%GZ,CN and complex flux can effectively lower the ash fusion temperatures(AFTs)of LA ash.As the mixing mass ratio of GZ and CN increases,the AFTs show a V-shaped variation;the combination of GZ and CN has a significant synergistic effect on reducing the melting characteristic temperature of Lu'an ash,and the synergistic effect is closely related to the addition amount and the mixing mass ratio of GZ and CN;the AFTs of Lu'an ash with composite flux is lower than that with GZ and CN alone,when the addition amount is 2%and the mixing mass ratio is 9∶1,or the addition amount is 4%,the mixing mass ratio is greater than 5∶5,or the addition amount is 6%and 8%with all mixing mass ratios.The mineral composition at high temperature demonstrates that when the addi-tion amount and the mixing mass ratio are 2%and 9∶1,the contents of mullite and sillimanite in Lu'an ash at high temperature are significantly reduced;when the addition amount is 4%-8%,the low-temperature eutectic is formed between albite and anorthite,calcite,gehlenite and other calcium-containing minerals at high temperature.These accounted for the synergistic effect of the composite flux on reducing theAFTs of Lu'an ash.关键词
煤气化/高灰熔点煤/工业固废/复合助熔剂/煤灰熔融性Key words
coal gasification/high ash melting point coal/industrial solid waste/complex flux/ash fusibility分类
化学化工引用本文复制引用
何鑫,孔令学,白进,申峻,杜安稳,李文..工业固废制备复合助熔剂用于调控高灰熔点煤灰的熔融特性研究[J].煤炭转化,2025,48(1):101-113,13.基金项目
国家自然科学基金项目(U23A20129)、山西省重点研发计划项目(202102090301004)和山西浙大新材料与化工研究院技术开发项目(2022SX-TD011). （U23A20129）
