能量色散X荧光光谱法测定煤灰成分方法研究  

Research on the determination of coal ash by energy dispersive X-ray fluorescence spectrometry method

作　　者：陈宝华 CHEN Baohua(CCRI(CangzhouBohai New Area)Coal TestingCorporation Ltd.,Cangzhou 061113,China;China Coal Research Institute Corporation Ltd.,Beijing 100013,China;National Coal Quality Inspection and Testing Center,Beijing 100013,China)

机构地区：[1]煤科(沧州渤海新区)煤炭检测有限公司,河北沧州061113 [2]煤炭科学技术研究院有限公司,北京100013 [3]国家煤炭质量检验检测中心,北京100003

出　　处：《煤质技术》2024年第5期85-90,共6页Coal Quality Technology

基　　金：煤炭科学技术研究院有限公司新产品新工艺开发基金资助项目(2023CG-MJ-01)。

摘　　要：采用能量色散X荧光光谱法测定煤灰成分,与化学分析法相比较则所需的设备相对简单且快速测得结果、操作更简单及更为经济有效。介绍采用能量色散(EDXRF)测定国能神优煤灰中多种灰成分的方法,针对灰样制备过程、基体效应、能谱模式等试验条件进行探讨,并通过多个煤灰标准样品进行核验,指出灰样制备过程采用研磨通过0.1 mm标准筛后于(815±10)℃灼烧1 h的标准方法进行,基体效应采用多元线性回归去除灰成分中硅与铝、磷与钙、钾与钙、铁钛钙间4种元素相互干扰情况,选择80 kcps-480 s能谱模式可通过多个煤灰标准样品检测,其结果与认定值的误差均在不确定度要求的范围内,数据准确,能够适用于目前实验室快速测定煤灰成分的要求。The determination of coal ash composition using energy-dispersive X-ray fluorescence spectrometry(EDXRF)is compared with the chemical analysis method,which requires relatively simple equipment and can obtain results quickly,with simpler operation and greater economic efficiency.This paper introduces the method of determining multiple ash components in Guoneng Shenyou coal ash using EDXRF.The experimental conditions such as the preparation process of the ash sample,matrix effect,and energy spectrum mode are discussed.The method is verified by multiple coal ash standard samples.It is pointed out that the preparation process of the ash sample should be carried out by grinding through a 0.1mm standard sieve and calcining at(815±10)℃for 1 hour.The matrix effect is removed by multiple linear regression to eliminate the interference between silicon and aluminum,phosphorus and calcium,potassium and calcium,and iron,titanium,and calcium in the ash components.The energy spectrum mode of 80 kcps-480 s can be detected through multiple coal ash standard samples,and the results are within the range of uncertainty requirements compared to the recognized values.The data is accurate and can meet the current laboratory’s requirements for rapid determination of coal ash components.

关 键 词：能量色散 X荧光光谱法 煤灰成分 基体效应 能谱模式 多元线性回归 

分 类 号：TQ531[化学工程—煤化学工程]