灰中酸性成分对灰熔融温度的影响

魏砾宏; 马婷婷; 李润东; 杨天华; 李延吉; 文丽娜

灰中酸性成分对灰熔融温度的影响

沈阳航空航天大学能源与环境学院, 沈阳辽宁 110136

基金项目: 国家自然科学基金(51176130); 辽宁省教育厅科学研究项目(L2012053)。

详细信息

通讯作者:
魏砾宏,Tel:+86 02489728508,E-mail:weilihong@sau.edu.cn。

中图分类号: TK16
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出版历程
- 收稿日期: 2014-05-29
- 修回日期: 2014-07-30
- 刊出日期: 2014-10-30

Effect of acidic compositions on ash fusion temperatures

College of Energy and Environmental, Shenyang Aerospace University, Shenyang 110136, China

摘要

摘要: 搜集并统计了世界129种典型煤种、城市污水污泥及污泥/煤混烧灰样的灰成分及灰熔融特征温度等相关数据,研究灰中酸性成分SiO₂、Al₂O₃、TiO₂和P₂O₅对灰熔融特性的影响。结果表明,Al₂O₃是决定灰熔点的主要因素,酸性金属氧化物SiO₂、Al₂O₃和TiO₂形成的耐熔矿物质石英、偏高岭石、莫来石、金红石等可提高灰熔点。非金属氧化物P₂O₅与污泥和污泥/煤的灰熔点FT二次拟合很好且明显降低熔点,污泥灰中P₂O₅含量显著高于煤灰是导致其熔点明显低于煤的重要原因。
- 酸性成分 /
- 灰熔融温度 /
- 灰 /
- 污泥 /
- 煤
Abstract: Ash fusion characteristic parameters of 129 typical original ash samples were collected locally and abroad, which included coals, sewage sludge and blends of sewage sludge/coal. These data were used to study the effect of acidic oxides including SiO₂, Al₂O₃, TiO₂ and P₂O₅ on ash fusion temperatures (AFTs). The refractory minerals such as quartz, metakaolin, mullite and rutile formed by SiO₂, Al₂O₃ and TiO₂ improve the AFTs. The results show that Al₂O₃ is a main factor in determining AFTs. Furthermore, the non-metal oxides P₂O₅ has a significant correlation with the FT of sewage sludge and sewage sludge/coal blends and its increase can obviously reduce AFTs, which might be caused by the higher P₂O₅ content in sewage sludge.
- acidic composition /
- ash flow temperature /
- ash /
- sewage sludge /
- coal

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参考文献(33)

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