Citation: YANG Xin, HUANG Jie-jie, FANG Yi-tian, WANG Yang. Slagging characteristics of fly ash from anthracite gasification in fluidized bed[J]. Journal of Fuel Chemistry and Technology, ;2013, 41(1): 1-8. shu

Slagging characteristics of fly ash from anthracite gasification in fluidized bed

YANG Xin ^1,2 ,
HUANG Jie-jie ^1,, ,
FANG Yi-tian ¹ ,
WANG Yang ¹

1.
1. Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China;

Corresponding author: HUANG Jie-jie,
Received Date: 12 August 2012
Available Online: 17 October 2012
Fund Project: 中国科学院战略性先导科技专项(XDA07050100) (XDA07050100) 中国科学院知识创新工程方向(KGCX2-YW-320)。 (KGCX2-YW-320)

An experimental procedure was tested for studying the sintering and fusion characteristics of fly ash from anthracite fluidized bed gasification at the temperature approaching the ash deformation temperature (DT), and the slagging characteristic was investigated. The quantitative analysis on the composition of crystalline mineral matter and the amorphous phases in the thermal treated ash was carried out using X-ray diffraction analysis (XRD). Experimental results show that the slagging tendency of fly ash is related to the transformation of minerals. AFTs of fly ash are lower than those of original coal due to higher contents of Fe, Ca, and Mg. The formation of melting matrix causes a liquid-phase sintering at 100~200℃ below the DT, which leads to a shrinkage deformation and clinkering due to the formation and transformation of feldspar that plays a 'glue’ role in sintering. A great amount of Ca and all of Fe are found in the glass phase, which improves the amorphous phase in concentration. These fluxing components in the glass phase that do not crystalize during thermal treatment can promote the densification process of sintering and the slagging or agglomeration tendencies.
- fly ash,
- fluidized bed gasification,
- slagging characteristics,
- minerals,
- glass phase,
- quantitative analysis
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