平顶山矿区一矿煤矸石特征及其利用途径分析

采集平顶山矿区一矿煤矸石山混合矸,经过粉碎、研磨、缩分后,采用常规化学分析、XRF、XRD、SEM、EDS、FTIR和DSC-TG研究煤矸石的化学组成和矿物组成,用高纯锗γ能谱法检测煤矸石的放射性,根据GB/T212-2008、GB/T213-2008对煤矸石进行工业分析和发热量测定.结果表明:煤矸石的主要化学成分为SiO2、Al2O3,以及Fe2O3、CaO、MgO、K2O、Na2O、TiO2、MnO等；矿物组分为高岭石、石英、白云母、白云石、方解石、伊利石和微量黄铁矿,并含有较多的有机碳.煤矸石放射性符合国标A类装修材料的要求,碳含量和发热量达到三类煤矸石要求,可以用来制备烧结砖、水泥和轻集料等建材制品.

Analysis of the characteristics and utilization of coal gangue in the NO.1 coal mine of Pingdingshan mine area

Coal gangue samples were collected from the gob piles in NO.1 coal mine of Pingdingshan mine area.After being crushed,ground,homogenized and quartered,the chemical composition and mineral composition of the coal gangue were investigated by the conventional chemical analysis,XRF,XRD,SEM,EDS,FTIR and DSC-TG.The radioactivity of coal gangue was detected by high-purity germaniumγ-ray.The proximate analysis and the calorific value of coal gangue were carried out according GB/T212-2008 and GB/T213-2008.The results show that the main chemical compositions of coal gangue are SiO2 and Al2O3,as well as Fe2O3,CaO,MgO,K2O,Na2O,TiO2 and MnO.The mineral components of coal gangue are kaolinite,quartz,muscovite,dolomite,small amount of calcite,illite and pyrite.It also contains a lot of organic carbon.The radioactivity of coal gangue meets the requirement of national standard for the decoration materials of class A.The fixed carbon content and calorific value satisfy the requirements for the class 3 coal gangue.Therefore,the coal gangue can be used to prepare the sintered brick,cement,lightweight aggregates and other building materials.