Research status and development trend of belt coal sampling technology

As the first link of coal quality testing, coal sampling technology plays an important role in the actual production and application. Based on the upgrading of China’s coal industry and the in-depth development of sampling technology, starting from the actual needs of coal-using enterprises in different fields, it is introduced that the current coal sampling methods in China mainly include manual sampling and mechanical sampling. According to the application situation, mechanical sampling is divided into automobile coal sampling, train coal sampling, chute coal sampling and conveyor belt coal sampling. The sampling standards of coal sampling technology in China are summarized, and the application status and development of coal sampling technology with conveyor belt at home and abroad are summarized. The coal sampling devices of conveyor belt are divided into conveyor belt end sampling devices and conveyor belt middle sampling devices according to different sampling positions. Several common types of conveyor belt end sampling devices and conveyor belt middle sampling devices are analyzed, and and the different types of sampling devices are systematically introduced. Through the analysis of the current situation of coal sampling technology and equipment of conveyor belt, four main problems existing in coal sampling technology of conveyor belt in China are summarized : ① Most of the sampling operations are not carried out in strict accordance with the sampling standards ; ② the basic research of sampling technology is not deep enough, and the key structure of sampling equipment still has certain defects ; ③ the sampling equipment is intelligent and the degree of automation is low; ④ the professional quality of the sampling equipment management personnel is not high. Considering the deep integration of intelligent control and detection technology and sampling technology, continuously improving sampling standards, improving the automation and intelligence of sampling equipment, and improving the adaptability of conveyor belt coal conveying sampling machinery are the future development direction of conveyor belt conveying sampling technology in China.