Experiments and Modeling of Ash Mineral Evolution in Burning High-Sulfur Coal with Lime
详细信息 查看全文
- 作者：Wenlong Wang ; Zhongyang Luo ; Zhenglun Shi ; Kefa Cen
- 刊名：Energy & Fuels
- 出版年：2011
- 出版时间：January 20, 2011
- 年：2011
- 卷：25
- 期：1
- 页码：130-135
- 全文大小：796K
- 年卷期：v.25,no.1(January 20, 2011)
- ISSN：1520-5029
文摘
The mineral phase evolution of ash was studied when high-sulfur coal was burnt with CaO at different proportions. Experiments were carried out in a drop-tube furnace. Modeling via FACTSAGE was performed by obtaining the absent thermochemical property data of the key mineral 3CaO路3Al2O3路CaSO4 and expanding the database. It was found that the ash mineral phases follow a certain rule to evolve and have an immense potential for modification. At low CaO proportion, 2CaO路Al2O3路SiO2 might be the dominant mineral phase in ash. However, with the increase of CaO addition, the amount of 2CaO路Al2O3路SiO2 may decrease and the amount of 2CaO路SiO2 and 3CaO路3Al2O3路CaSO4 may increase noticeably. Owing to the excellent hydraulic characteristics of the latter two minerals, coal ash is very possible to become cement-like. The findings may open up an efficient way to burn the high-sulfur coal. The burning of high-sulfur coal with lime may result in an attractive sulfur fixation as well as a high-quality byproduct.