准格尔煤田高铝煤矸石中勃姆石富集特征及成因

doi:10.11799/ce201405038

煤炭工程 ›› 2014, Vol. 46 ›› Issue (5): 116-118.doi: 10.11799/ce201405038

准格尔煤田高铝煤矸石中勃姆石富集特征及成因

石松林¹,刘钦甫¹,孙俊民²,伍泽广²,孙波¹

1. 中国矿业大学（北京）
2. 大唐国际高铝煤炭研发中心

收稿日期:2013-12-15 修回日期:2014-02-24 出版日期:2014-05-15 发布日期:2014-05-10
通讯作者: 刘钦甫 E-mail:lqf@cumtb.edu.cn

Enrichment and genetic analysis of boehmite in high-alumina partings in the coal seam of the Jungar Coalfield

Received:2013-12-15 Revised:2014-02-24 Online:2014-05-15 Published:2014-05-10

摘要/Abstract

摘要：

运用X射线衍射分析（XRD）、光学显微镜、扫描电镜（SEM）及能谱分析（EDX）等技术，研究了准格尔煤田大饭铺煤矿6号煤层夹矸中富铝矿物的种类、相互关系及其成因。研究表明：夹矸中富含勃姆石（60%）和高岭石（40%），光学显微镜下两者具有明显的共生关系，能谱面分析（Mapping）图像中可见Si元素与Al元素富集部位不同，两者分异现象明显；夹矸中勃姆石主要是由高岭石脱硅蚀变而来的，勃姆石主要分布于高岭石晶层之间和晶粒表面周围，并逐渐向高岭石内部蚀变。

关键词: 准格尔煤田, 勃姆石, 高岭石, 高铝煤矸石

Abstract:

The mineralogical characteristics of the partings in the No.6 coal seam from the Dafanpu Mine of the Jungar Coalfield were studied using analytical procedures including X-ray diffraction (XRD), optical microscope, electron scanning microscope equiped with an energy dispersive X-ray spectrometer(SEM-EDX). The results showed that the main minerals in the partings were boehmite (60%) and kaolinite (40%), which had obvious genetic relations in optical microscope images. The Al-rich area was different from the Si-rich area in SEM-EDX Mapping images. The boehmite was transformed from kaolinite in the desilication. The chemical reaction reacted strongly in the space between crystal layers of kaolinite and strongly around the kaolinite surface.

Key words: Jungar Coalfield, boehmite, kaolinite, high-alumina partings

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