化工进展2017，Vol.36Issue(z1)：167-174,8.DOI:10.16085/j.issn.1000-6613.2017-1318
碱性氧化物对煤灰熔融特性影响的研究进展
Research progress on the effect of alkaline oxides on coal ash fusibility
摘要
Abstract
The high contents of sodium and calcium in Zhundong coal induce severe slagging problems in boilers 'heating surfaces durning coal combustion.The slagging of coal ash has important relationship with coal ash fusibility,and the alkaline oxides in coal ash can influence the ash fusibiltiy significantly.Recent progress on the effect of alkaline oxides on coal ash fusibility was summerized.The present studies show that the addition of Na2 O can reduce the ash fusion temperatures (AFTs)significantly.The Na containing minerals with low melting point such as albite, nepheline and the eutectics they form is the main reason for reducing the AFTs.K2 O mainly exists as illite in ash, the AFTs show no significant change as the K2 O content varies.The AFTs drop first and rise later with the increase of CaO or MgO content,the change of minerals'melting point leads to the change of the AFTs.The existing form of Fe2 O3 depends on the reaction atmosphere.The Fe in ash mainly exists as FeO in reducing conditions, Fe-containing minerals such as fayalite and hercynite can easily form eutectics thus reducing the AFTs.Further studies should be focused on the effect of alkaline oxides on the ash fusibility of Zhundong coal,to produce novel additives for resisting the slagging problems efficiently.关键词
煤燃烧/灰熔融特性/碱性氧化物/准东煤/结渣/沉积物Key words
coal combustion/ash fusibility/alkaline oxides/Zhundong coal/slagging/deposition分类
能源科技引用本文复制引用
王东旭,王洋,李文艳,肖海平..碱性氧化物对煤灰熔融特性影响的研究进展[J].化工进展,2017,36(z1):167-174,8.基金项目
国家科技支撑计划项目(2015BAA04B02). （2015BAA04B02）
