洗煤过程中煤结构的变化

化工学报 ›› 2010, Vol. 61 ›› Issue (12): 3220-3227.

洗煤过程中煤结构的变化

石金明，向军，胡松，孙路石，苏胜，徐朝芬，许凯

华中科技大学煤燃烧国家重点实验室，湖北武汉 430074

出版日期:2010-12-05 发布日期:2010-12-05

Change of coal structure during washing process

SHI Jinming, XIANG Jun, HU Song, SUN Lushi, SU Sheng, XU Chaofen, XU Kai

Online:2010-12-05 Published:2010-12-05

摘要/Abstract

摘要：

选用山西阳泉无烟煤、东北贫煤、云南小龙潭褐煤，通过洗煤制取煤样，低温灰化并采用XRF进行灰成分分析，结合傅里叶红外光谱法对煤结构进行分析，而且引入了红外参数来反映整个分子结构的变化。研究发现：水洗对煤中的矿物质脱除效果不明显，主要脱除的是可溶性物质，而酸洗主要脱除的是晶态SiO₂，但是还有部分物质不能被脱除;随着煤阶的增加，煤中的矿物质与煤分子结构结合更紧密。煤化程度越低，煤结构中的基团越复杂，煤化程度高的煤中，谱图比较规律，在指纹区中，更能反映洗煤对煤结构的影响。对红外参数的分析说明了贫煤和无烟煤中脂肪度都很低，且主要以芳环碳骨架为主，而褐煤中存在很多支链结构。

关键词: FONT-SIZE: 10.5pt, mso-bidi-font-size: 11.0pt, mso-bidi-font-family: 宋体, mso-font-kerning: 1.0pt, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, mso-bidi-language: AR-SA, mso-ascii-font-family: Calibri">傅里叶变换红外光谱法hansi-font-family: 宋体" lang=EN-US>;FONT-SIZE: 10.5pt, mso-bidi-font-size: 11.0pt, mso-bidi-font-family: 宋体, mso-font-kerning: 1.0pt, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, mso-bidi-language: AR-SA, mso-ascii-font-family: Calibri">洗煤hansi-font-family: 宋体" lang=EN-US>;FONT-SIZE: 10.5pt, mso-bidi-font-size: 11.0pt, mso-bidi-font-family: 宋体, mso-font-kerning: 1.0pt, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, mso-bidi-language: AR-SA, mso-ascii-font-family: Calibri">矿物质hansi-font-family: 宋体" lang=EN-US>;FONT-SIZE: 10.5pt, mso-bidi-font-size: 11.0pt, mso-bidi-font-family: 宋体, mso-font-kerning: 1.0pt, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, mso-bidi-language: AR-SA, mso-ascii-font-family: Calibri">煤结构

Abstract:

In order to demonstrate the change of coal structure and the effect of mineral, Yangquan anthracite, Northeast lean coal and Xiaolongtan lignite were used in this study, and the samples were prepared by washing with water and acid.Low-temperature ashing and X-ray fluorescence(XRF) were used to analyze the ash compositions, and coal structure was analyzed by Fourier infrared spectrum(FTIR）.Introducing infrared parameters provided additional information of the molecular structure of coal which was not reflected by FTIR.It was shown that the effect of water-washing for demineralization was not remarkable, and the main removed minerals were soluble substances, but the main removed minerals during acid-washing were crystalline SiO2.With the increase of coal rank, minerals and coal molecular structure integrated more closely.The lower the coal rank, the more complex the groups in coal structure, but the IR spectrum indicated a regular pattern in high rank coal.The aliphatic degree in lean coal and anthracite were very low and there was aromatic carbon skeleton mainly, but there was a lot of branched-chain structure in lignite.

Key words: FONT-SIZE: 10.5pt, mso-bidi-font-size: 11.0pt, mso-bidi-font-family: 宋体, mso-font-kerning: 1.0pt, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, mso-bidi-language: AR-SA, mso-ascii-font-family: Calibri">傅里叶变换红外光谱法hansi-font-family: 宋体" lang=EN-US>;FONT-SIZE: 10.5pt, mso-bidi-font-size: 11.0pt, mso-bidi-font-family: 宋体, mso-font-kerning: 1.0pt, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, mso-bidi-language: AR-SA, mso-ascii-font-family: Calibri">洗煤hansi-font-family: 宋体" lang=EN-US>;FONT-SIZE: 10.5pt, mso-bidi-font-size: 11.0pt, mso-bidi-font-family: 宋体, mso-font-kerning: 1.0pt, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, mso-bidi-language: AR-SA, mso-ascii-font-family: Calibri">矿物质hansi-font-family: 宋体" lang=EN-US>;FONT-SIZE: 10.5pt, mso-bidi-font-size: 11.0pt, mso-bidi-font-family: 宋体, mso-font-kerning: 1.0pt, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, mso-bidi-language: AR-SA, mso-ascii-font-family: Calibri">煤结构

石金明, 向军, 胡松, 孙路石, 苏胜, 徐朝芬, 许凯. 洗煤过程中煤结构的变化 [J]. 化工学报, 2010, 61(12): 3220-3227.

SHI Jinming, XIANG Jun, HU Song, SUN Lushi, SU Sheng, XU Chaofen, XU Kai. Change of coal structure during washing process[J]. CIESC Journal, 2010, 61(12): 3220-3227.

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