Research on the stability for 3 mm retention coal samples of Shenhua
This study investigated the changes in characteristic values of various main detection items of Shenhua coal 3mm stored coal samples with prolonged storage time.By selecting 6 representative Shenhua coal varieties and inviting 11 laboratories to participate in collaborative experiments,the experimental items include moisture,ash content,volatile matter,total sulfur,calorific value,and hydrogen,lasting for 71 days.Summarizing and analyzing experimental data,the results showed that the calorific value of the six varieties participating in the experiment was significantly unstable,with a significant decreasing trend over time,and a good linear correlation.An innovative estimation formula for the decrease in calorific value was provided.The characteristic values of ash,volatile matter,total sulfur,and hydrogen are relatively stable and have little variation over time.The conclusion of this study provides data support for the reasonable handling of quality deviation issues in re inspection in coal trade.
coal of Shenhuaretention coal samplesstabilitycollaborative testinglinear regression
NETL
NSTL
万方数据
