Citation: ZHANG Bo, ZHANG Hong, YANG Yun-fei, HU Guang-zhou, ZHANG Peng-qi, LUN Fei. Study on the influence of particle size on the ash melting behavior of Jincheng coal[J]. Journal of Fuel Chemistry and Technology, ;2018, 46(12): 1430-1436. shu

Study on the influence of particle size on the ash melting behavior of Jincheng coal

1.
Qinhuangdao Entry-Exit Inspection and Inspection Bureau Coal Detection Technology Center, Qinhuangdao 066003, China
2.
School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou 221116, China

Corresponding author: ZHANG Hong, hzhang@cumt.edu.cn
Received Date: 6 August 2018
Revised Date: 28 September 2018

Fund Project: The project was supported by the National Natural Science Foundation of China and Shanxi Low Carbon Coal Foundation(U1510106)the National Natural Science Foundation of China and Shanxi Low Carbon Coal Foundation U1510106

Figures(9)

The slagging mechanism of the Jincheng coal in the ash-agglomerate fluidized bed gasification was explored. A typical Jincheng coal sampled from Shanxi, China was prepared into different particle size and the XRF, XRD, AFT, SEM and FactSage^TM were employed to study the influence of particle size on the ash content, chemical and mineral composition and ash fusibility. The results indicate that the ash chemical composition and AFTs vary little with size below 6 mm. For the pulverized samples below 0.2 mm, there are apparent differences in the chemical composition and mineral composition, especially in Fe₂O₃. Both AFT results and SEM observations show that the sample with particle size less than 45 μm has a significantly higher melting temperature than the other three samples. The slag contents calculated with FactSage^TM are consistent with the AFT results and SEM observations, which indicates that the change of ash melting behavior with particle size results from the change in chemical composition. The ternary phase diagram of SiO₂-Al₂O₃-Fe₂O₃ can be used successfully to explain the mechanism of the change of ash melting behavior with particle size for Jincheng coal.
- Jincheng coal,
- ash-agglomerate fluidized bed,
- ash fusion temperature,
- slagging
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