Development status and prospects of rapid ash content detection technology in coal preparation plants
The research on the development status of ash rapid detection technology is of great significance for the development of ash determination technology that meets the needs of intelligent coal preparation plant construction.The rapid ashing method,active and passive online testing,and national standard automatic ash measurement technology were systematically sorted out,the main problems in existing technologies were identified,and some suggestions were proposed.Research has found that the overall technological level of coal preparation plants in mining area in China is relatively lagging behind,and there are still significant gaps in automation and accuracy in the sampling,preparation,and chemical analysis process among different regions or enterprises.The rapid ashing method has problems such as low efficiency,high labor intensity of workers,and poor representativeness of samples,which can no longer meet the requirements of coal preparation plants.The testing accuracy of active online testing methods such as low-energy gamma ray backscatter,high-energy gamma ray annihilation radiation,dual-energy gamma ray transmission,neutron activation,X-ray fluorescence spectroscopy,and laser-induced breakdown spectroscopy(LIBS)is greatly affected by coal quality characteristics parameters such as coal type,particle size,ash composition and content,moisture,and coal preparation process conditions,and there are also many problems such as relatively high equipment investment costs,radiation source management,and daily maintenance management costs.The national standard method of fully automatic ash measurement technology realizes the automated operation of sampling,sample preparation,and ash measurement,with high testing accuracy but relatively long testing time.The research and development of ash content rapid detection technology in coal preparation plants should be based on the overall requirements of rapid determination,high precision,high accuracy,unmanned level and standardization.Customized research and development should be carried out according to the actual needs of coal preparation production and coal preparation processes,and the level of intelligence and digitization should be improved through technologies such as digital twins.
coal preparation plantrapid ash content detectionsampling and sample preparationstandardizationintelligentization
NETL
NSTL
万方数据
