Abstract:Combined with the uses of checking coal sample and existing problems in coal sample management, the structure and operation flow of intelligent storage system was introduced in detail in this paper. It was summarized the improvements on sample storage, authority control, network real-time remote monitoring and certification, custom rule of selective examination, and automatic remind of processing expired samples after using the system.It was suggested to design independent monitoring device of each bottle, and the special cabinet with large capacity drawer for 13mm total moisture checking sample.

Abstract:Through the coal quality analysis of screen overflow and screen underflow at different grinding durations,the grindability difference of mineral substance and organic components in low rank coal was researched,and the comparison research of grindability of inertinite and vitrinite in organic components was done.The results showed that the grindability of mineral substance in low rank coal was better than the organic components,the pulverized coal mineral substance was easier to be grinded to the fine particles compared with the organic components;the grindability of inertinite was better than vitrinite,which means that the inertinite is easier to be grinded to pulverized coal fine particles.

Abstract:Based on international standard proposal of Solid mineral fuels - determination of total sulfur in coal by titration method, the research experiment of international inter laboratory studies were done, the analysis and research for experimental data were done, so the precision of this method could be determined, and the accuracy could be evaluated.It was shown that: the determination result of this method and the classic Eschka method have no significant bias, the precision and accuracy could all meet the requirements, so the scientificalness of this international standard proposal and adaptability internationally could be proved.