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本文阐述了用超热中子活化分析法测定矿石样品中金时,由于超热中子自屏蔽产生的金的减低情况(或称减低因子),制备了3种不同金粒度范围的合成金矿样,并分别用热中子活化分析方法和超热中子活化方法分析。3种金粒度的范围即:≤53μm、53—150μm和150—250μm合成的矿样,超热中子活化分析结果与热中子活化分析法比较,金分别降低了11%、31%和33%。同时,测得金的标准参考矿物MA-1的减低因子为5%,加拿大CANMET标明,其粒度≥80%的成分小于37μm。
This article describes the use of super-thermal neutron activation analysis method for the determination of gold ore samples, due to the reduction of gold produced by the self-shielding neutron reduction (or reduction factor), prepared three different gold particle size range of synthetic gold And analyzed by thermal neutron activation analysis and superheated neutron activation respectively. The range of the three gold particle sizes is: ≤53μm, 53-150μm and 150-250μm synthetic ore samples, compared with the thermal neutron activation analysis results of thermal neutron activation analysis, the gold decreased by 11%, 31% and 33 %. At the same time, the standard reference mineral MA-1 gold reduction factor of 5%, Canada CANMET marked, the particle size ≥ 80% of the components less than 37μm.