Study on mineral factor of ternary-component blended coal on coal ash fusibility and its fusion mechanism

Published on Jan 1, 2013in Journal of China Coal Society
Zhao Qing-liang1
Estimated H-index: 1
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Abstract
The work described in this paper was to determine the improved high-temperature ash-fusion behavior by means of ternary-component blended coal technique.All the experiments based on three kinds individual coal which existed remarkable difference in coal ash chemical composition and ash fusion temperature.According to ternary-component blended coal with a certain proportion,mineral components and ash chemical composition were analyzed by Xray diffraction(XRD) and X-ray fluorescence(XRF) separately.The results show that refractory minerals and fluxing minerals in coal have a prominent effect on high-temperature ash-fusion behavior.Mineral Factor(MF) is introduced to characterize this influence between minerals and ash-fusion behavior.Moreover,with the more content of anorthite,the fusion temperature will decrease more obviously,while the law of mullite is just the opposite.Meanwhile,A negative correlation is found between the strongest peak intensity of anorthite as well as the relative content of amorphous glass and the ash flow temperature,quartz and mullite are just on the contrary about FT temperature.High-temperature ashfusion behavior can be improved by utilizing ternary-component blended coal technique.
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#1Fenghai Li (CAS: Chinese Academy of Sciences)H-Index: 17
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Abstract Blending is a promising method to modify the ash-fusion characteristics of coal to meet gasification requirements. To investigate the variation in ash-fusion behavior for high ash-fusion-temperature (AFT) coal through coal blending and its regulating mechanism, the ash-chemistry characteristics of four coals (Nantun, Pengzhuang, Biaodian, and Xiangyuan) were analyzed. Mineral-transformation behaviors in the mixed ashes were investigated by X-ray powder diffractometry using normalized re...
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#1Fenghai Li (CAS: Chinese Academy of Sciences)H-Index: 17
#2Huixia XiaoH-Index: 5
Last. Yitian Fang (CAS: Chinese Academy of Sciences)H-Index: 28
view all 3 authors...
Abstract To investigate the correlation between ash flow temperature (FT) and its average mole ionic potential (I average ), the FT of ten coals were tested by ash fusion temperature analyzer, and ash compositions were analyzed on an X-ray fluorescence spectrometry. An approximately linear relationship between the FT and its I average was found: FT = 509.12 + 17.98 I average , and its R-squared value was 0.9054. The experimental FTs were all consistent with the linear relationship in the range o...
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