准格尔煤田高铝煤矸石中勃姆石富集特征及成因  

Enrichment Features and Causes of Boehmite in High-Alumina Partings of Junger Coalfield

作　　者：石松林[1] 刘钦甫[1] 孙俊民[2,3] 伍泽广[2,3] 孙波[1] 

机构地区：[1]中国矿业大学(北京)地球科学与测绘工程学院,北京100083 [2]大唐国际高铝煤炭研发中心,内蒙古呼和浩特010050 [3]国家能源局高铝煤炭开发利用重点实验室,内蒙古呼和浩特010050

出　　处：《煤炭工程》2014年第5期116-118,122,共4页Coal Engineering

基　　金：国家自然科学基金资助(51034006;41072119)

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。The mineralogical characteristics of the partings in the No. 6 coal seam from the Dafanpu Mine of the Jungar Coalfield were studied applying X - ray diffraction （XRD） , optical microscope, electron scanning microscope equiped with an energy dispersive X -ray spectrometer （SEM -EDX）. The results show that the main minerals in the partings are boehmite （ 60% ） and kaolinite （40%）, with obvious genetic relations in optical microscope images. The A1 - rich area is different from the Si -rich area in SEM -EDX Mapping images. The boehmite is transformed from kaolinite in the desilieation. The chemical reaction reacted strongly in the space between crystal layers of kaolinite and strongly around the kaolinite surface.

关 键 词：准格尔煤田 勃姆石 高岭石 高铝煤矸石 

分 类 号：TD98[矿业工程—选矿]