Fast-thermal Neutron Induced Prompt γ-ray Analysis Measures The Volatile In Coal

In the coal industry it is often necessary to have suitable quantitative date avaitable concerning the chemical concentrations, volatile matter yield or quantity of heat in coal.Untill the recent years, these information was obtained by means of sampling techniques associated with conventional chemical anylysis.These methods are ill-suited to plant automation for its low efficiency.The nuclear techniques,owing to the penetration power of the radiations,can provide new control prospects that can eliminate the difficulties linking to the sampling techinques,hereby allowing direct on-line analysis of the coal.Neutron-induced prompt gamma-ray analysis(NIPGA) can be used for fast analysis of coal .Fast-thermal neutron interact with the nucleus of the coal to produce inelastic scattering(n, n'γ) reaction and neutron cappture(n, γ) reaction.We can obtain the chemical concentrations in coal by means of induced prompt gamma-ray spectrum ,thereby calculate the quantity of volatile matter yield.Pulsed neutron generator brings valuable help in this methed for its fast open-shut capability and improving signal-to-noise ratio.This paper introduce the analysis methed,principle and system of the quantity of volatile in coal by means of the fast-thermal neutron-induced gamma-ray by pulsed neutron generator.We avoid the interfere of different elements with the multiple linear regression on spectra. The deviation of the quantity of volatile in coal between NIPGA and conventional chemical anylysis is equal to or less than 1.5% 。...