贵州无烟煤灰分与高位发热量相关性研究

煤的燃烧性能与煤中各物质的含量有密切关系。灰分的分析是煤工业分析的重要内容。为了快捷、省时、省力确定煤的发热量,以历年来采集的400组贵州无烟煤煤质数据为基础,通过计算,得到了灰分与发热量的回归方程。通过相关性检验发现:相关系数R为0.999,大于相关系数临界值,表明线性关系特别显著。通过误差检查,确定回归方程式推算误差置信范围为0.16。为了进一步验证回归方程的准确性,用贵州12个主要产煤区煤样的实测值与计算值进行比较,发现最大误差值为0.18,最小误差值为-0.01,远小于GB/T 213—2008《煤的发热量测定方法》规定的再现性临界差。

Research on correlation of ash content of anthracite and gross calorific value

Combustion performance of coal is closely relevant to its components.Ash analysis is an important part of coal proximate analysis.In order to get calorific value of Guizhou anthracite with less time and consuming,taking 400 groups coal quality data gathered over years as samples,get the regression equation between ash content and calorific value.The correlation test indicates that the correlation coefficient R is 0.999,which is greater than critical value.That means the inner relation is quite remarkable.The error confidence interval has been calculated which is plus or minus 0.16 according to error detecting.In order to further test and verify the accuracy,coal samples from 12 main mining area in Guizhou Province are used to compare the measured value with calculated value.The results show that the maximum error is 0.18,the minimum error is-0.01,far less than the reproducibility critical error stipulated in GB/T 213—2008 determination methods of coal calorific value.