煤的真相对密度测量结果不确定度评定  

Evaluation of Uncertainty in Measuring Result of True Relative Density of Coal

作　　者：陈娟[1] 刘儒 刘桂林 刘喆 慕苗[1] 李梅[1] 马向荣[1] 薛成虎[1] CHEN Juan;LIU Ru;LIU Gui-lin;LIU Zhe;MU Miao;LI Mei;MA Xiang-rong;XUE Cheng-hu(School of Chemistry and Chemical Engineering,Yulin University,Shaanxi Yulin 719000,China;National Coal and Salt Chemical Product Quality Supervision and Inspection Center(Yulin),Shaanxi Yulin 719000,China)

机构地区：[1]榆林学院化学与化工学院,陕西榆林719000 [2]国家煤及盐化工产品质量监督检验中心(榆林),陕西榆林719000

出　　处：《当代化工》2020年第2期264-267,共4页Contemporary Chemical Industry

基　　金：国家自然科学基金项目(51762042);陕西省教育厅重点实验室科研计划项目(17JS147,18JS121,18JS124,19JS073);国家煤及盐化工产品质量监督检验中心(榆林)开放基金(2019YLMYZX-003,2019YLMYZX-002);陕西省科技资源开放共享平台项目(2019PT-18);陕西省科技厅项目(2018GY-086).

摘　　要：以JJF 1059.1-2012《测量不确定度评定与表示》为依据,结合数学模型,计算出相关灵敏度系数,分析并评价影响煤真相对密度不确定度的每一个因素。结果表明:真相对密度合成标准不确定度为0.014,扩展不确定度为0.028,测定结果的不准确性主要由干燥煤样质量md(不确定度为4.4×10-4)引入,而测定试样的Mad(不确定度为0.029)是md不确定度偏大的主要原因。Based on the standard JJF1059.1-2012"Evaluation and expression of uncertainty in measurement",the main sources of uncertainty in measuring of true relative density of coal were analyzed,the sensitivity coefficient of each component was calculated,and each uncertainty component was evaluated.The result showed that the combined standard uncertainty of true relative density was 0.014 and expanded uncertainty was 0.028.The inaccuracy of the results was mainly caused by the quality md of dried coal(the uncertainty was 4.4×10-4),while the Mad(the uncertainty was 0.029)of the measured sample was the main reason for the high uncertainty of the md.

关 键 词：煤 真相对密度 不确定度 扩展不确定度 

分 类 号：TQ533[化学工程—煤化学工程]