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我队利用中子俘获法测定钻孔中非磁性铁矿中铁元素的品位。从矿区岩石的全分析资料看,岩石中主要含有Fe、Si、Ca、C、O、H、Mn等元素,而Al、Mg、K、N、P等含量少。铁的俘获截面较大,其7.646和7.632MeV峰(统称7.64MeV)的单、双逃逸峰易测、干扰较小。其它元素不致影响铁的测量。对Fe_2O_3试剂、纯大理岩、煤、石蜡和水等样品进行了测定,测得Fe_2O_3试剂的俘获γ能谱见图1。
Our team used neutron capture method to determine the grade of iron in non-magnetic iron ore boreholes. According to the total analysis data of the rock in the mining area, the rock mainly contains Fe, Si, Ca, C, O, H, Mn and other elements while the content of Al, Mg, K, N and P is small. Iron capture section larger, its 7.646 and 7.632MeV peak (collectively 7.64MeV) single and double escape peak easy to measure, less interference. Other elements do not affect the measurement of iron. The Fe_2O_3 reagent, pure marble, coal, paraffin and water samples were measured, and the captured γ spectrum of the Fe_2O_3 reagent was measured as shown in FIG. 1.